水流开关使用说明书 doc
安恒电子流动水平开关产品说明书
ߜ Reed Switch Design for High Repeatability
LVN-20, $29, shown actual size.
These liquid level switches are
sealed with potting compound. The
only path for liquid to the electrical
switch would be through the wires.
If the wires are terminated in an
appropriate manner [e.g. NEMA 6
(IP68) connectors], the level switch will meet or exceed a NEMA 6
LVN-10: 1⁄8 NPT LVN-20: 1⁄4 NPT Switch: SPST
Comes complete with operator’s manual.
Ordering Examples: LVN-20, low cost liquid level switch, $35. LVN-10, low cost liquid level switch, $29.
54 NOM (2 1/8 NOM)
SEALED TO MEET NEMA VI
1/8" NPT (1/8" BSPT) 11 mm HEX (7/16" HEX)
FLOAT 25 DIA x 25 mm H (1 DIA x 1" H)
87 NOM (3 7/16 NOM)
水流计使用方法说明书
水流计使用方法说明书使用方法说明书一、产品说明本说明书主要介绍水流计的使用方法。
水流计是一种用来检测流体流量的仪器，适用于各种液体和气体的流量测量。
本水流计采用先进的技术和高精度传感器，能够准确、稳定地测量流体的流量。
二、使用前准备1.确认产品完整：在开始使用前，检查水流计是否完好无损，并确保配件齐全。
2.仔细阅读说明书：请认真阅读本使用方法说明书，了解产品的结构、性能和使用要求。
3.检查流体参数：在使用水流计时，需要了解被测流体的温度、压力和介质等参数，确保测量的准确性和安全性。
三、使用步骤以下是水流计的使用步骤：步骤一：安装与接线1.选择合适的安装位置：根据实际需要，选择合适的安装位置并固定水流计。
2.连接电源：将水流计的电源接线与电源线连接，确保电源供应稳定。
3.接线：将水流计的信号接线与检测设备接线端口连接，确保信号传输畅通。
步骤二：参数设置1.打开电源：接通电源并确认电源指示灯亮起。
2.进入设置界面：根据产品说明书，进入相应的设置界面。
3.设置参数：根据被测流体的实际参数，按照说明书中的指导进行参数的设置。
步骤三：校准1.开始校准：在校准前，请确保水流计已经预热并稳定工作。
2.按照校准操作说明：根据产品说明书中的校准操作说明，按照要求进行校准。
3.保存校准数据：根据说明书中的指引，将校准数据保存在水流计中。
步骤四：开始测量1.打开水流计：根据产品说明书中的指引，打开水流计并等待其初始化完成。
2.选择测量模式：根据需要选择合适的测量模式，并调整相应参数。
3.开始测量：按下开始按钮，水流计将开始测量流体的流量。
4.记录数据：在测量过程中，可以查看实时数据，并记录需要的数据。
步骤五：维护与保养1.定期清洁：根据产品说明书，定期清洁水流计，确保其正常工作。
2.保护仪器：使用水流计时，请避免剧烈震动和碰撞，保护仪器免受外界损伤。
3.定期维护：按照产品说明书中的要求，定期对水流计进行维护和保养。
四、注意事项1.安全使用：使用水流计时，请遵守相关安全操作规程，确保人员和设备的安全。
水流开关水流量开关安全操作及保养规程
水流开关水流量开关安全操作及保养规程1. 前言水流开关水流量开关是用于监测水流状态并控制水流量的装置。
本文将介绍水流开关水流量开关的安全操作规程以及保养规程，帮助用户正确和有效地使用和维护该装置。
2. 安全操作规程2.1 安装前的准备在安装水流开关水流量开关之前，需要进行以下准备工作：•确保安装位置符合设备要求，并能够方便监测水流状态；•检查设备包装是否完好，确保设备没有损坏；•确保安装人员具备相关的安装经验和技能。
2.2 安装步骤按照以下步骤进行水流开关水流量开关的安装：1.关闭水源，确保工作环境安全；2.清洁安装位置，确保没有杂物和污垢；3.将水流开关水流量开关安装在合适的位置，使用螺丝固定；4.确保装置与水管连接紧密并且无泄漏；5.打开水源，检查设备是否正常工作。
2.3 操作注意事项•使用前请仔细阅读产品说明书，并按照操作步骤进行操作；•请勿在高压下操作该装置，以免发生危险；•请勿将棉布等可燃物放置在装置附近，以免发生火灾；•请勿使用尖锐物体损坏装置，以免影响正常使用。
3. 保养规程正确保养水流开关水流量开关可以延长其使用寿命，并确保其性能正常。
以下是一些常见的保养规程：1.定期清洁：定期清洁装置以去除污垢和杂物。
首先，关闭水源，将装置拆卸下来，用清水和中性清洁剂清洁各个部位，然后用干净的布擦干并重新安装。
2.注意防冻：在寒冷的冬季，如遇到结冰的情况，请关闭水源并将装置从水管中拆卸下来，放置在温暖干燥的地方，等待冰融化后再重新安装。
3.定期检查：定期检查装置的工作状态，确保其正常运行。
特别注意观察是否有泄漏现象，如有泄漏及时处理。
4. 总结水流开关水流量开关是一项重要的设备，用于监测水流状态并控制水流量。
正确的操作和保养可以确保该装置的正常性能和安全使用。
本文介绍了水流开关水流量开关的安全操作规程以及保养规程，希望能对您有所帮助。
注意：本文仅用于提供操作和保养的参考信息，具体操作和保养应根据设备使用说明书进行。
FSW300系列流量开关说明书
FSW300 Series Starts at
£90
Adjustable Switch Point
Low Pressure Drop
Economical
Field Installation for 1⁄2 to 8" Pipes
Instant Response
Dimensions (Excluding Paddle or Tee): 114 x 38 x 89 mm (4.5 x 1.5 x 3.5")
SPECIFICATIONS FSW302, 303, 304
Max Pressure: 25 bar (362 psi)
Max Process Temp: 110°C (230°F)
4.9 to 6.8 (1.3 to 1.8) 9.5 to 12.1 (2.5 to 3.2) 10.6 to 14.8 (2.8 to 3.9)
Comes complete with operator’s manual. Ordering Example: FSW305-G, inline flow switch, 1⁄2" PVC tee connection, 70A-2, audible alarm, £90 + 10.75 = £100.75
Comes complete with operator's manual.
Ordering Example: FSW301, insertion style flow switch and 70A-2, fast pulse tone alarm, £90 + 10.75 = £100.75
B-75
FS8-WJ 防溅型流量开关 说明书
重量 约 0.9Kg 2 55 0.39 35 0.27 210 1.6 180 1.36 对应2B 2 1/2 70 0.36 45 0.24 270 1.44 220 1.19 57mm 115VDC 0.3A
颜色 黑色 3 95 0.31 65 0.21 330 1.16 270 0.95 对应3B
最大使用压力 1.03MPa 11 20 0.55 15 0.37 65 2.0 55 1.7 对应1B 115VAC 7.4A 44.4A 1 14 / 30 0.48 20 0.34 110 1.9 90 1.6 32mm
温度范围 0～107℃ 1/2 35 0.45 25 0.31 140 1.8 120 1.5 38mm 230VAC 3.7A 22.2A
FS8-WJ
防溅型流量开关
FS8-WJ防溅型流量开关是一插入型的流量开关，安装于1～6(B) 英寸的水流管道上，用于探测水的断流或低流量。 其传感部分由一挡板和一内藏微动开关小箱组成，挡板连接一个 微动开关，当流量变化时，挡板带动微动开关动作，其动作流量 可以通过一个流速调整螺丝调整。
规格书
本体/ 操作单元 适用流体 输出信号 型号 FS4-WJ 动作流量 最小调整值 (出厂设定） 水 (无腐蚀性) ON-OFF (微动开关SPDT 接点) 接液部材质 本体:青铜 挡板:蒙乃雨 管道尺寸(B) 流量 动作 停止 最大调整值 动作 停止 插入挡板尺寸 接点容量 /min m/s /min m/s /min m/s /
型号 FS8-WJ 说明 防溅型流量开关， NEMA-4X (IP56)
27 79 1/2-14NPT
M
132.5 89.5 (212.5) 44
33.5 HEX R1 t 0.1 t 0.15 t 0.2 28.5 28.5
IO-Link数字流量开关操作手册说明书
Before UseDigital Flow SwitchPF3A703H/PF3A706H/PF3A712H-LSafety InstructionsThese safety instructions are intended to prevent hazardous situations and/orequipment damage.These instructions indicate the level of potential hazard with the labels of"Caution", "Warning" or "Danger". They are all important notes for safety and mustbe followed in addition to International standards (ISO/IEC) and other safetyregulations.OperatorThank you for purchasing an SMC PF3A703H/PF3A706H/PF3A712H-L DigitalFlow Switch.Please read this manual carefully before operating the product and make sure youunderstand its capabilities and limitations. Please keep this manual handy forfuture reference.Safety Instructions1324DisplayBody(IN side)Connector pin numbers(on the product)Mounting•Never mount the product in a place that will be used as a mechanical support during piping.•Never mount the product upside down.•Attach the piping so that the fluid flows in the direction indicated by the arrow on the body.•The monitor with integrated display can be rotated.Rotating the display with excessive force will damage the end stop.•Visibility decreases if the display is viewed from the opposite side to the buttons.Check the settings and display from in front of the display.Mounting and InstallationRefer to the product catalogue or SMC website (URL https://) for moredetailed information.IN OUTArrowthe IN side of the product.When installing a regulator at the IN side of the product, make sure that hunting is not generated.•The piping on the IN side must have a straight section of piping whose length is 8 timesthe piping diameter or more.If a straight section of piping is not installed, the accuracy will vary by approximately 3%F.S.•Avoid sudden changes to the pipingsize on the IN side of the product.The accuracy may vary.•Do not release the OUT side pipingport of the product directly to theThe accuracy may vary.○Flow direction○Rotation of the display•Use the correct tightening torque for piping. (Refer to the table below for the requiredtorque values.)•If the tightening torque is exceeded, the product can be damaged.If the tightening torque is insufficient, the fittings may become loose.•Avoid any sealing tape getting inside the fluid passage.•Ensure there is no leakage after piping.•When mounting the fitting, a spanner should be used on the body (metal part) of thefitting only.Holding other parts of the product with a spanner may damage the product.Specifically, make sure that the spanner does not damage the M12 connector.■WiringConnection•Connections should only be made with the power supply turned off.•Use a separate route for the product wiring and any power or high voltage wiring. If wiresand cables are routed together with power or high voltage cables, malfunction may resultdue to noise.•If a commercially available switching power supply is used, be sure to ground the frameground (FG) terminal. If the product is connected to the commercially available switchingpower supply, switching noise will be superimposed and the product specifications will notbe satisfied. In that case, insert a noise filter such as a line noise filter/ ferrite between theswitching power supplies or change the switching power supply to the series power supply.Connecting/Disconnecting•Align the lead wire connector with the connector keygroove, and insert it straight in. Turn the knurled partclockwise. Connection is complete when the knurledpart is fully tightened. Check that the connection is notloose.•To remove the connector, loosen the knurled part andpull the connector straight out.Connector pin numbers (lead wire)Outline of SettingsPower is supplied.∗: If a button operation is not performed for 3 seconds during the setting, the display will flash. (This is toprevent the setting from remaining incomplete if, for instance, an operator were to leave during setting.)∗: 3 step setting mode, simple setting mode and function selection mode settings will reflect on each other.■3 step setting modeIn the3 step setting mode, the set value selected in the sub display and the hysteresiscan be changed in just 3 steps.Switch ONP_1Flow[L/min]H_1settingsWhen shipped, the default setting is as follows.When the flow exceeds the set value [P_1], the switch will be turned ON.When the flow falls below the set value by the amount of hysteresis [H_1] or more, theswitch will turn OFF.If the operation shown below is acceptable, then keep these settings.For more detailed settings, set each function in the function selection mode.(1) Press the S button once when the item to be changed is displayed on the subdisplay.The set value on the sub display (right) will start flashing.S<Operation>[Hysteresis mode]In the 3 step setting mode, the set value (P_1 or n_1) and hysteresis (H_1) can bechanged.Set the items on the sub display (set value and hysteresis) using the ▲ or ▼ buttons.When changing the set value, follow the operation below. The hysteresis setting can bechanged in the same way.(2) Press the ▲ or ▼ button to change the set value.The ▲ button is to increase and the ▼ button is to decrease the set value.●Press the ▲ button once to increase the value by one digit, press and hold tocontinuously increase.●When ▲ and ▼ buttons are pressed simultaneously for 1 second or more, the setvalue is displayed as [ - - - ], and the set value will be set to the same as thedisplayed value automatically. Afterwards, it is possible to adjust the value bypressing ▲ or ▼.●Press the ▼ button once to reduce the value by one digit, press and hold tocontinuously reduce.(3) Press the S button to complete the setting.To change setting, refer to the operation manual from SMC website(URL https://) or contact SMC.<Operation>[Hysteresis mode](1) Press the S button for 1 second or longer(but less than 3 seconds) in measurementmode. [SEt] is displayed on the main display.When the button is released while in the [SEt] display, the current flow value isdisplayed on the main display, [P_1] or [n_1] is displayed on the sub display (left)and the set value is displayed on the sub display (right).(2) Change the set value using the ▲ or ▼ button, and press the SET button to set thevalue. Then, the setting moves to hysteresis setting.(5) Press and hold the S button for 2 seconds or longer to complete the simple setting.(If the button is pressed for less than 2 seconds, the setting will be returned to P_1.)(3) Change the set value with the ▲ or ▼ button, and press the S button to set thevalue. Then, the setting moves to the setting of OUT2.∗1: Selected items of (1) to (4) become valid after pressing the S button.∗2: After enabling the setting by pressing the S button, it is possible to return to measurementmode by pressing the S button for 2 seconds or longer.∗3: When the output mode is set to accumulated pulse, error output or output OFF, the simplesetting mode cannot be used.(the setting returns to measurement mode by releasing the button when [SEt] is displayed.)■Simple setting modeIn the simple setting mode, the set value, hysteresis and delay time can be changed whilechecking the current flow value (main display).(4) Like the setting of OUT1, the setting returns to the setting of OUT2 by pressing theS button after setting the set value and hysteresis.∗: When [F 1] and [F 2] are set to accumulatedpulse output, error output or output OFF [---]will be displayed in the sub screen when[SEt] is displayed. It is not possible to moveto the Simple setting mode.Change the Function Settings∗1: Setting is only possible for models with the units selection function.∗2: [F 2] The OUT2 setting can be set on the product screen, but since there is no OUT2 switch outputfunction as an output specification, it is not possible to output the ON/OFF signal to an external device.∗3: When the 1 switch output type (output specification symbol is L) is used, [F5] is displayed as [---]and cannot be set.1 to 5 V or 0 to 10 V can be selected when the analogue voltage output type is used.Analogue output free range function can be selected.∗4: When Line name is selected, a suitable line name can be input.To change setting, refer to the operation manual from SMC website(URL https://) or contact SMC.■Function selection modeIn measurement mode, press theS button for 3 seconds or longer,to display [F 0].The [F] indicates the mode forchanging each Function Setting.Press the S button for 2 secondsor longer in function selectionmode to return to measurementmode.To change setting, refer to the operation manual from SMC website(URL https://) or contact SMC.○Reset operationThe Accumulated Flow, Peak Value and Bottom Value can be reset.To reset the accumulated value, press the ▼ and S button for 1 second or longer.○Snap shot functionThe current flow rate value can be stored to the switch output ON/OFF set point.When the items on the Sub display (left) are selected in either 3 step setting mode, Simplesetting mode or Setting of each function mode, by pressing the ▲ and ▼ buttonssimultaneously for 1 second or longer, the value of the sub display (right) will show "----",and the values corresponding to the current flow rate are automatically displayed.MaintenanceHow to reset the product after a power loss or when the power has beenunexpectedly removedThe settings for the product are retained in memory prior to the power loss or de-energizingof the product.The output condition is also recoverable to that prior to the power loss or de-energizing.However, this may change depending on the operating environment. Therefore, check thesafety of the whole installation before operating the product.If the installation is using accurate control, wait until the product has warmed up(approximately 10 to 15 minutes) before operation.Refer to the product catalogue or operation manual from SMC website(URL https://) for more information about the product specifications anddimensions.Specifications / Dimensions○Key-lock function(1) Press the S button for 5 seconds or longer in measurement mode. When [oPE] isdisplayed on the main display, release the button.The current setting "LoC" or "UnLoC" will be displayed on the sub display.(2) Select the key locking/un-locking using the ▲ or ▼ button, and press the S button toset.To use each of these functions, refer to the operation manual from SMC website(URL https://) or contact SMC.The IODD file can be downloaded from the SMC website (URL https://).Note: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer.© 2020 SMC Corporation All Rights ReservedAkihabara UDX 15F, 4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, JAPANPhone: +81 3-5207-8249 Fax: +81 3-5298-5362URL https://PF※※-OMX0003Troubleshootingdisplayed, please contact SMC.Refer to the operation manual from SMC website (URL https://) for moreinformation about troubleshooting.。
BL-FRC电子式流量开关说明书
Tianjin Bily Science and Technology Development Co., Ltd. BL-FRC电子式流量开关应用领域：主要适用于气动和液压系统，可用于循环水，切割液及润滑油的断流监测，以及泵的空转保护。
一、概述基于热式原理在封闭的探头内包含两个电阻，其中一个被加热作为探测电阻，另一个未被加热作为基准电阻，当介质流动时，加热电阻上的热量被带走，电阻值被改变，两个电阻差值被用作判断流速的依据。
二、特点无活动部件，免维护。
安装方便，一种型号适用于多种管径要求。
开关量连续调节，极低的压力损失。
结构紧凑，LED显示流动趋势及开关状态。
三、适用场合主要适用于气动和液压系统，可用于循环水，切割液及润滑油的断流监测，以及泵的空转保护。
四、技术参数插入式设定范围1---150cm/s（水）3---300cm/s（油），20---2000cm/s（空气）信号输出PNP、NPN、继电器供电24V±20%DC接通电源最大40mA（PNP或NPN型）最大1A@48V ac/dc（继电器型）空载电流最大80mA设定方式电位器设定耐压范围100bar介质温度变化≤4℃/s响应时间1…13s，典型值2s初始化时间约8s电气保护反相，短路，过载保护防护等级IP67介质温度-20…80℃环境温度：-20…80℃储存温度：-20…10℃材质探头：不锈钢，外壳：不锈钢测量精度±2.5%六、外形尺寸图Tianjin Bily Science and Technology Development Co., Ltd.七、接线图继电器型输出接线 PNP 型输出接线 NPN 型输出接线八、LED 功能及设定（开关量型）九、安装注意事项L+L+棕。
流量开关zwpcl01说明书
流量开关zwpcl01说明书
1.打开流量开关外壳;
2.开关出厂时已设定在约为最小流量值。
调高流量设定值，顺时针旋转调节螺丝①;
3.按动靶片来检查微动开关是否正常工作，过多的逆时针旋转调节螺丝，可能导致流量开关失效;
4.安装结束后，请通过按动流量开关杠杆数次来检查，一旦发下杠杆回复时没有“咔嗒“声，顺势正旋转调节螺丝直到回复时有“咔嗒“声；
5.禁止取出螺丝固定夹②，否则将造成流量调节螺丝失效;
6.漆封的调节螺丝③仅供出厂调整流量开关状态，请勿改变或调解;
7.应观察三个工作周期，确定开关和与之联系运转正常，并及时盖上开关外壳。
EF-G 液体流量开关说明书
ManualFunctionThe EF-G liquid flow switch is designed for controlling and monitoring fluid flows. The function is based solely on the flow of the liquid and is not affected by the system’s static pressure; however, the system does require a basic pressure in excess of 1 bar.The switch is customised for applications where alarms for low flows are required while large flows can pass through without any increased fall in pressure. The switch has a variable through-flow area that increases as the flow increases.The through-flowing fluid lifts a spring-loaded pressure plate. The shaft on which the plate is mounted is mechanically connected to a lever that actuates a built-in micro-switch. The dimension of the pressure plate controls the signal point. The contact changes positions at the ordered alarm point, which can be selected from 1.5 l/m to 30 l/m.If, for example, the switch is used to start a high-pressure pump or to open a valve, the flow may be allowed to increase significantly across the alarm point since the tray is lifted higher and the through-flow area increases continuously. Conversely, the switch can be installed in a flow system for e.g. protection against the dry running of a pump. Normally, at high flows, the fall in pressure across the switch is negligible. Nevertheless, the low flow alarm can be set to as low as 1.5 l/min since the through-flow area continues to decrease as the flow decreases and the plate moves downwards.Those parts that come into contact with the liquid are manufactured in dezincification-resistant brass and stainless steel. Synthetic rubber gaskets. EF-G has an epoxy plastic laminate insulation board which protects the inductive sensor.EF-G designsTwo different connection dimensions of the SP-G model are available: SP-G15 ½” female and SP-G20 ¾” male.EF-G has a built-in inductive sensor with alternating contact function.The outlet side can be rotated 90° or 180°, providing a number of alternative mountings for horizontal or vertical piping.Mounting examples with inlet andoutlet in different directions.Installation instructions EF-G•Refer to the type plate and check that the desired alarm point in l/min and the liquid (e.g.water or oil) are correct.•Check that the amperage does not exceed the maximum load according to the switch contact specifications.•Make sure that the arrow on the switch housing is pointing in the direction of the flow.•Make sure not to exceed the maximum operating pressure of 100 bar.•Make sure the liquid temperature does not fall below the minimum temperature or exceed the maximum temperature: –20 °C to +70 °C.•Mount the switch in the desired position. The outlet side may be rotated 90° or 180°.•If there is a risk of freezing, the outlet side connection should point downwards in order to allow for drainage.•No straight sections are required upstream or downstream of the switch.•Install a dirt filter at the front if there is a risk of clogging. Specifications EF-GFlow range: 0-3,5 m/s. Max. flow limited by pump capacity and acceptablepressure drop.Alarm point: Min 1,5 l/min, max 30 l/min.Connections: EF-G15: ½” BSP femaleEF-G20: ¾” BSP malePressure: Max 100 bar. Min 1 bar.Temperature: -20 °C - +70 °CProtection class: IP67 (NEMA 6)Wetted materials: Dezincification-resistant brass, stainless steel 316 and PTFENitrile (HNBR)/EPDM seals. Optional FPM (Viton)Sensor: Inductive sensor with 1.5 m cable. 20-265 V DC / AC. Other sensors offeredon request.Max hysteres: +/- 10%Pressure drop: Appr. 0,03 bar/1,5 l/minElectrical dataDimensions and weightVikt: 1,1 KgEletta Flow ABBox 5084141 05 Kungens Kurva08 – 603 07 70******************Proprietary RightsThis manual contains confidential technical data, including trade secrets and proprietary information, that are the property of Eletta Flow AB, Sweden.Any changes or alterations to downloaded or printed Eletta original documentation such as manuals, drawings, leaflets, newsletters etc, are not permitted without a written permission from Eletta Flow AB, Sweden. These data are only disclosed to you under permission of limited use within your company. Use for manufacturing or processing is not permitted. Any other use of data and information is strictly prohibited without prior written permission from Eletta Flow AB, Sweden.。
瑞乐科技“SS-H”型水力开关操作手册说明书
1.0 INTRODUCTIONThe Ruelco “SS-H” hydraulic pressure switch is a two way bleed valve this is operated by pressure acting on a piston opposing an adjustable spring force. It functions as either a normally closed or normally open valve. Pressure applied to the sense port will cause the valve to operate.The Model 4HH2 operates as a normally open valve and is called a high switch. If sense pressure acting on the piston is at normal levels, it is insufficient to overcome the spring force. The middle o-ring on the spool is positioned below the bent grooves on the bottom sleeve, thus preventing the instrument pressure from passing to the “Vent” port of the switch body. When the pressure acting on the piston becomes large enough to overcome the spring force, the spool shifts and the center o-ring moves in between the vent grooves on the bottom sleeve. Instrument pressure at the “In” port “Bleeds” into the reservoir through the “Vent” port.The pressure switch “Bleed” action is the same for Model 4HL2. For this model of operation, the switch acts as a normally closed valve and is called a low switch. When normal sense pressure is acting on the piston, the center o-ring on the spool is above the vent grooves in the top sleeve, thus preventing the instrument pressure from passing to the “Vent” port of the switch body. When the sense pressure decreases to an abnormal level, the spring force shifts the spool and the middle o-ring on the spool becomes positioned in between the vent grooves in the top sleeve. Instrument pressure at the “In” port, “Bleeds” into the reservoir through the ‘Vent” port. Changing the sense pressure value when the switch is used as either a high or low id done by altering the force of the spring, the size of the sense piston force is accomplished by turning the spring cap to increase or decrease the spring compression. The piston diameter is changed by adding or removing o-rings on the piston or changing the piston.2.0 INSTALLATIONThe “SS-H” can be panel mounted (with optional panel mount nut) or supported by piping from the sense port in either verticalor horizontal positions. If the switch is mounted horizontally, it is recommended that the small vent holes in the side of the switch body be oriented in a downward position. This will prevent any debris from accumulating in the spring cavity or above the sense piston. It is recommended that the product not be exposed to direct sunlight as this may cause a hazard to personnel.Proper PIPE thread sealant should be used on any pipe fittings threaded into the pressure switch ports. If stainless steel fittings are used, a sealant that will prevent galling is required. When the switch is mounted using the ½” NPT base connectionis adequately tightened, DO NOT loosen the body from the base or re-position the ports. Instead, remove the switch and re-make the ½” NPT connection.3.0 DISASSEMBLY (See Spec Sheet) Tools and materials required for proper disassembly, repair and assembly are as follows:1. 7/8”, 1” and 1-5/16” open endwrenches or two crescent wrenchesof adequate size.2. Small pliers.3. For switches using ¼” diameterpiston, 1 ¼” open end wrench or asuitable crescent wrench.4. High quality silicone base lubricant.5. An appropriate safety solvent.3.1 PARTIAL DISASSEMBLYA) Spring Removal3.1.1 If the switch is installed in anoperating instrument system, it is notnecessary to remove any instrumentsupply or sense pressure. If the unitis a high switch, it will trip whenchanging the spring. If it is a lowswitch, it will not trip when changingthe spring. Precautions should betaken to avoid any unwantedreactions in the instrumentationsystem.3.1.2 To obtain access to the spring (Item2), rotate the lock ring (Item 4)clockwise to loosen it from the springcap (Item 1).3.1.3 Rotate the spring cap (Item 1)counterclockwise until it isdisengaged from the switch body(Item 10).3.1.4 Remove the spring from its cavity inthe switch body. If the parts tube(Item 3) is inside the spring, careshould be taken not to lose it.3.1.5 Follow the procedures in repair andassembly section (Steps 4.15 and4.16) of this manual re re-install thespring.B) Piston Removal3.1.6 If the switch is panel mounted, it isnot necessary to remove it from thepanel. It will be necessary todisconnect any piping or tubing fromthe base that would prevent thebase from being removed. When theswitch is supported by the ½” NPTconnection on its base (Item 16),disconnect any piping or tubing fromthe switch body that would preventits removal from the switch base.CAUTION: Be sure that allinstrument and sense pressures arecompletely bled to zero beforedisconnecting any piping or tubing.3.1.7 Use the appropriate wrenches tohold and loosen the base from theswitch body. Unthread the basecompletely from the switch body.3.1.8 Use the small pliers and grip theraised ridge on top of the piston(Item 15) and pull it from the switchbase (Item 16).3.1.9 If the ¼” diameter piston (Item 19) isinstalled and must be removed fromthe large piston, use the properwrench to hold the ¼” diameterpiston and grip the large piston withthe pliers at the small diameterabove the groove for the .5” pistono-ring (Item 18). Rotate either onecounterclockwise to loosen andseparate the pistons.3.1.10 Remove the installed o-ring from thepiston.3.1.11 Procedures for re-installing thepiston o-rings are in the repair andassembly procedure of this manual.3.2 FULL DISASSEMBLYNOTE: Use the following instructions to completely disassemble the pilot for repair and cleaning. CAUTION: Be sure that all instrument or sense pressures are completely bled to zero before disconnecting any ping or tubing.3.2.1 Follow the procedures stated underpartial disassembly to remove thespring and pistons.3.2.2 Remove the spool (Item 14) from theswitch body. If it is necessary, usethe small pliers and grip the smallend of the spool. Removing thespool also removes the bottomsleeve (Item 13).3.2.3 To remove the top sleeve (Item 8),an o-ring pick (pointed prying tool)can prove useful. Just insert the pickinto one of the .041 holes in the topsleeve and pull the sleeve out. Notethat while using the pick, care shouldbe taken not to scratch the bore onthe top sleeve.3.2.4 The seals on the spool and sleevesmay now be replaced as perinstructions given in the repair andassembly section of this manual.4.0 REPAIR AND ASSEMBLY4.1 Remove the seals from the spool(Item 14), top sleeve (Item 8),bottom sleeve (Item 13), and thepiston (Item 15).4.2 Clean all parts using an appropriatesafety solvent.4.3 Inspect the spool for any majordamage such as burrs or nicks on itsoutside diameter. Also inspect it forstraightness. Replace the spool ifdamaged. 4.4 Examine the polished bores of thepressure switch body (Item 10) forgouges and rough surfaces. Besure that all heavy dirt deposits havebeen removed and replace if thebody is damaged.4.5 Replacement seals from anauthentic RUELCO REPAIR KIT arerecommended to ensure properswitch performance.4.6 Install new seals on the spool, topsleeve, and bottom sleeve andlightly lubricate the seals.CAUTION:Do not leave excessivelubricant on the spool. Doing somay prevent the switch fromoperating to specifications.4.7 Verify the required switch range fromthe Range Selection Chart on thespecification sheet.4.8 Install the required o-ring on thepiston. CAUTION:Do not installmore than one o-ring on the piston.Only one spring range can beselected per switch. Place anyunused o-rings into the parts tube(Item 3) for storage.4.9 When replacing seals on theoptional ¼” piston, install the back-up seal (Item 20) first. Be sure thatthe angle cut ends of the back-upseal overlap to form a smooth flatsurface. Make sure that the back-upis closest to the large diameter of thepiston and install the o-ring (Item 21)onto the piston.4.10 Lightly lubricate all seals beforerebuilding the pressure switch.4.11 Place the spool into the top sleeve,with the angled side going into thetop sleeve. Then place the topsleeve/ spool into the bottom sleeve.The spool should move back andforth around .25” inside the sleeves. 4.12 Place the entire spool/ sleeveassembly into the body.4.13 Install the piston fully into the switchbase. The piston should move backand forth freely.4.14 Thread the switch base into the bodyand firmly tighten using theappropriate wrenches.4.15 Install the lock ring (Item 4) onto thebody and place the spring plate(Item 6) into the body cavity. Note: Ifthe switch is panel mounted, install itinto the panel and secure with apanel mounting ring (Item 5) prior toinstalling the lock ring and springplate.4.16 Install the spring (Item 2) into theswitch body. CAUTION: Verify thatthe spring is the proper color for therange required as shown on theRange Selection Chart on the SS-Hcut sheet.4.17 Place the parts tube inside the cap(Item 1) and thread onto the switchbody. Adjust the switch operation asper user requirements and methods. 5.0 RECOMMENDED MAINTENANCE 4.1 Test Switch Trip Pressure Every 30days4.2 Disassembly, inspect and lubricateYearly or as required4.3 Replace all seals Every two years oras required。
水流开关使用说明书 doc
水流开关使用说明书概述：3S系列液体水流开关用于流经管道的液体流量变化，例如水、乙二醇或其它非危害性液体。
当液体流量超过或低于设定的流量值时，其单刀双掷开关触点（SPDT）可使一个回路导通，而同时切断另外一个回路。
该水流开关通常使用在需要连锁作用或“断流”保护场所。
典型的应用为当冷冻机系统中冷却水断流时，可有效的切断压缩机电流，以保护冷冻机及整个冷冻系统的损坏。
特点：液体压力可高达1MPa，使用范围广。
不锈钢叶片有四，用于直径25~150mm通径的管路。
可根据需要拆卸叶片的节数或修正叶片的长度。
设定点可调整，用户可根据需要进行修整其流量值。
外壳采用全封闭结构，对电器装置有效的防尘，防水汽（可能会有少量凝露）电器开关为整件，封闭式，对少量凝露不会产生漏电的危险。
接线空间大，方便用户接线。
技术参数：电器负载AC250V 15A AC380V 10A绝缘电阻Over 100MΩ,DC500VM耐压AC 1500V/1minute触点寿命1000K 次波纹管寿命5000K 次最大压力17.5kg f/cm2(1750KPa)工作压力10kgf/cm2(1000KPa)环境温度0~60℃流体温度Max 100℃(212°F)，150℃防护标准IP53接口规格DN15(1/2") DN20(3/4") DN25(1") NPT重量0.7kKg3S流量开关可根据所安装总管线的管径，使用不同叶片。
水流开关的安装3S系列水流开关采用NPT 密封螺纹管路接头，有1英寸、4分、6分三种规格，用户订货时选择与管径配套的接头。
外壳的箭头方向应与管路内流向一致水流开关应安装在水平管路上。
如必须安装在垂直管道上，则液体流向应向下往上流。
绝不允许安装在自上往下流向的垂直管路上。
水流开关在使用中绝不允许流向倒流，以免造成叶片反向断裂。
附：叶片修整图：注意:带*的叶片为出厂时安装的带∆的为附加的叶片（未安装）其余尺寸为修正用休整后的叶片安装时，其顶端不得与管壁有任何摩擦，且与管壁底部有5~10mm间隙接线图：典型安装图：水流开关的调节1、打开水流开关外壳；2、开关出厂时已设定在约为最小流量值。
S-09-073数字式水流开关使用及功能设置操作规范(1)
4． 流量设定方法
4.1 按住 SET 键直到屏幕上显示[F_1] ，再次按下 SET 键，进入 OUT1 流量设定模式，屏 幕上显示 [n_1](非反向输出模式下为[P_1]), [n_1]与设定值交替显示，按动▲键与▼键 选择希望的设定值，按▲键增大设定值，按▼键减小设定值，设定完毕按 SET 键确 认，屏幕上显示[n_2] (非反向输出模式下为[P_2])， [n_2]与设定值交替显示，按动▲ 键与▼键选择希望的设定值，按 SET 键确认；接着屏幕上显示 OUT2 的设定模式， 设定方法同 OUT1，只是[n_1]与[n_2]变为[n_3]与[n_4]。
小原（南京）机电有限公司
OBARA (Nanjing) Machinery & Electric CO. ,LTD
文件名称 数字式水流开关使用及功能设置操作规范
1． 数字式水流开关规格说明
文件编号 版次 页号 密等
O/N-S-09-073 第0版
1/5
普通
PF2 7
流体类型 A：空气 W：水
流量范围 04：0.5 to 4L/min 20：2 to 16L/min 40：5 to 40L/min 11：10 to 100L/min
80mA。
载和配线。
进行复位操作，对所有数据进行
设定的数据发生了变化。
再设定。如果设定无法复位，请
将设备交给供应商。
流量超过了额定流量的范围。
将流量下降到额定范围内，错误 显示会自动复位。
Er1、Er2、Er4 的显示复位，需同时按▲键与▼键。
备注：以上操作说明仅限 SMC 的 PF2W 系列数字式水流开关。
4/5
普通
我们通常的设定是[n_1]＜[n_2], [n_1] 设定额定流量，[n_2] 设定最大流量。
水流开关
水流开关水流量开关（简称水流开关）用于水冷冷凝器的出水管处或者蒸发器出水管处，用来检测通过热交换器的水流量，装在出水管处是因为确保有足够的水经过热交换器，从而避免制冷剂冻裂蒸发器，或者保证冷凝器的散热效果，避免高压过高！不管是冷凝器还是蒸发器，一般都是下进上出，有出水一定有进水，有进水不一定有出水，所以放在出水管上更稳定水流开关是保护压缩机的，当水流开关感受到蒸发器（或冷凝器）有足够水流通过时，压缩机才能正常运行，否则水流开关就会切断压缩机的电路使其停机以避免事故。
所以水流开关应该装在设备出水管上才更可靠。
如果装在设备进水管上则可靠性降低，比如当进水管压力足以使水流开关动作（误以为有足够水流通过），但实际水流量很小（甚至有气体混合在水流中通过），就容易产生事故。
如果装在设备出水管上，系统水流经过设备减压后，上述误动作的可能性就大大减少了水流开关只有装在出水管上才更可靠，因为如果装在进水管上，水管在水流开关后、设备前管段损坏，水流开关判断有水，而实际机组已经断水，此时就不能保护停机，而装在出水管上就不存在这个问题。
水流开关实际就是流量开关，是检测循环流量，作为断流保护的。
一般精度要求都不高，即使50%额定流量也可以用，安装位置不需要讲究。
习惯安装在主机出水端主要是该处湍流严重的程度低些。
如果安装在进水口需要在远离弯头的直管段上。
水流开关带有靶片，如果安装在管路的垂直段，因流体回落的原因（俗称：水锤）会造成靶片断裂的故障。
水流开关只对流速有兴趣，只要能保证有合理的流速，安装在管路的任意位置效果是一样只有直管段才能保证合理流速，靠近弯头、大小头、三通等管件处有涡流存在，容易导致失灵。
水流开关的正确安装是:安装在出水的水平管,安装的位置要在5倍管径的中央.为什么不能安装在进水管?因为安装在进水管会存在隐患,那就是当水流开关的挡片断了,直接冲到蒸发器或冷凝器的铜管上,由于比较锋利,有可能会破坏,机组一进水,可是大修呀正常情况下，靶流开关装在机组进水端和出水段的道理是一样的，如果进口没足够水流，出口也没有。
SMC水流量开关说明书
＊线路 ・ 请勿重复的弯折及拉伸导线。
如果导线的配置可能导致重复用力弯折及拉伸，将引起断线。 另外，弯曲的半径原则上在 R65mm 以上。 ・ 请勿错误接线。 错误接线的不同情况，可能破坏流量开关。 ・ 请勿在接通电源时进行接线作业。 可能导致单元内部发生破损或错误运转。 ・ 请勿与动力线及高压线使用相同的接线线路。 因动力线・高压线输出的信号线中的噪音・电涌的混入可能导致发生错误的运转。 流量开关的接线线路请与动力线・高压线分开(不同线路)配置。 ・ 请确认线路的绝缘性。 如果绝缘不良(与其它线路混触，接线末端间的不良 etc)，由于向流量开关附加过大电压负荷或混入电 流，可能会导致流量开关破坏。 ・ 为了防止混入噪音・电涌，请尽量缩短线路。 请将长度维持在 100m 以下。 ＊使用环境 ・ 请勿在腐蚀性气体及液体中使用。 可能导致故障、错误运转。 ・ 请勿在水･药液･油飞溅的场所使用。 可能导致故障、错误运转。 ・ 请勿在发生磁场的场所使用。 可能导致流量开关的错误运转。 ・ 请勿在经常会被水飞溅的环境下使用流量开关。 请避免在经常会被水飞溅的环境下使用流量开关。 绝缘不良、流量开关内部密封树脂的膨胀可能导致错误运转。 ・ 请勿在油分・药品环境中使用。 对于在切削液及清洗液等、各种油类及药品的环境下使用时，有时短期内也有可能对流量开关产生恶 性影响(绝缘不良、流量开关树脂的膨胀所导致的错误运装、导线硬化等)。 ・ 请勿在温度不稳定的环境下使用。 在正常气温变化以外的温度变化环境中使用，可能对流量开关内部造成恶性影响。 ・ 请勿在电涌发生源的场所内使用。 在流量开关周围，如发生大量电涌的装置设备(电磁式升降机·高频诱导炉·电动机等)放置时，可能导致 流量开关内部回路元件的老化或者破损。因此，请考虑电涌发生源的对策，同时注意避免管路的混触。 ・ 请勿使用发生电涌的负荷。 在继电器・电磁阀等直接驱动可发生电涌电压的负荷上，请使用内藏型电涌吸收元件的产品。 ・ 因在 CE 标注中未含对雷电涌的耐性，所以请在装置方面制定雷电涌对策。 ・ 请勿让线路杂物等异物混入产品内部。 可能导致故障、错误运转，所以请勿让线路杂物等异物混入流量开关内部。
流量开关使用说明书
ML4-25系列流量开关应用:本开关为单刀双掷(SPDT)的流量开关，用于检测、观察液体流量的继动器，一般用于空气调节，供水设备方面的用途，用于感应流经管道的液体流量变化，如水、乙烯、乙二醇或其它非危害性液体，其典型应用在需要有连锁作用或“断流”保护的场所。
尺寸规格：● 外壳64×64×48mm (TC20A 型) ● 外壳52×52×48mm (TC20B 型) ● 外壳64×64×48mm (TC20S 型)●外壳64×64×48mm (TC20P 型增强尼龙接口) 本系列已获得CE 认证电气参数： 开关接点额定值： 5A, 1/4HP, 125VAC~250VAC 10A, 1/4HP, 125VAC~250VAC 15A, 1/4HP, 125VAC~250VAC 微动开关有认证标准。
接线图：ML4-25型接线请阅产品上的电路图如TC20B 型： “1”接头—红线 “2”接头—黄线 “4”接头—蓝线 典型流量值（标准型） 表1特殊要求可配8寸流向片国家专利号：ZL02216612.2 03008435.7参数规格：ML4-25型最大工作压力 1.6MPa （TC20A 型：特制3.0MPa ） ML4-25P 型最大工作压力1.1Mpa, ML4-25S 型最大工作压力3.0Mpa （特制4.0MPa ）接头尺寸1”NPT, 3/4”NPT, 1/2”NPT, 1-1/4”NPT流量调节范围及介质温度范围：● 18升/分~2000升/分（标准型） ● 5升/分~3000升/分（非标准型） ●-15℃~100℃（TC20A, TC20B ） ● -15℃~80℃(TC20P)●-45℃~120℃(TC20S 不锈钢型) ●120℃~245℃(TC20S 不锈钢型特制)PRESSURE DROP CHARACTERISTICS （压力损失特性）：标准安装与调节：流向Pressure Drop (dgf/cm 2)1”Paddle (1”流向片)2”Paddle (2”流向片) 3”Paddle (3”流向片）注意：为使开关能感应流量的变化，流向片不得与管道接触，也不得与管道中的任何节流装置接触。
FSW -120系列水壳流量开关说明书
FSW -120 SeriesMolded Flow SwitchPPS Resin -R4Installation:FSW -120 units are factory -calibrated with water in vertical position, with lead wires up. Observe properdirection of liquid flow, as marked “IN” and “OUT” on housing. Can be installed in any orientation.Be careful to keep foreign material out of units during installati on. Use of 50 micron filtration is recommended. All plastic NPT threads should be installed using a suitable thread sealant. (Such as Teflon tape or Permatex “No More Leaks.”) Sealant must be kept out of unit during installation.Avoid over -tightening when connecting piping to unit, which is constructed of plastic material. Connection of metallic pip-ing to plastic units is not recommended.WARNING: FSW -120 flow switches are plastic, straight -thread, “O” ring sealed instruments. Over -tightening will result in breakage.Port Adapter Fittings: Install plastic adapters with O -rings (supplied) directl y i nto “IN” and “OUT” ports before in-stalling unit. CAUTION: Do not exceed 20 inch -pounds maximum torque when installing adapter fittings. Hold wrench flats on adapters as indicated below when installing unit i n piping to prevent additional torque accumulation between adapter and body. (Note: Port adapter fittings must be purchased separately.)Maintenance: The onl y maintenance normall y requi red is occasional cleaning when excessive contamination is pre-sent in the liquid. To disassemble the unit for cleaning: W ith system shut down and no liquid in piping, remove (1) Piston Plug, (2) Spring, and (3) Piston. It is not necessary to remove the unit from the system. Reassemble unit in reverse order (#3 to #1). Use care when handl ing spring to prevent distortion. M-5170/1112Important Points:Omega products must be maintained and installed in strict accordance with the National ElectricalCode and the applicable Omega product instruction Bulletin that covers installation, operation and proper maintenance. Failure to observe this information may result in serious injur y or damages.For hazardous area applications involving such things as, but not limited to, ignitable mixtures, combustible dust and flammable materials, use an appropriate explosionproof enclosure or i ntrinsicall y safe interface device.Please adhere to the pressure and temperature limitations shown throughout this catalog for our level and flow sensors. These limitations must not be exceeded. These pressures and temperatures take into consi deration possible system surge pressures/ temperatures and thei r frequencies.Selection of materials for compatibility with the medi a is critical to the life and operation of Omega products. Take care in the proper s election of materials of construction, testing is requi red. Life expectancy of switch contacts varies with application.Ambient temperature changes do affect switch set points, since the gravity of a liquid can vary with temperature. Our sens ors have been designed to resist shock and vibration. However, shock and vibration should be minimized. Filter liquid media containing particulate and/or debris to ensure the proper operation of our products. Electrical entries and mounting points in an enclosed tank may require liquid/vapor sealing. Our sens ors must not be field -repaired.Physical damage sustained by product may render it unserviceable.Switch Ratings MaximumResistive Loadhermetically sealed reed switch for pilot duty only.Wiring DiagramDimensions240327 rev B。
LFS系列液体流量开关规格说明书
Page 1Copyright © 2021 Sensata Technologies, Inc. | LFS SERIESPADDLE FLOW SWITCHESSPECIFICATIONSThe LFS range of flow switches are paddle devices that are mounted vertically through a socket or upstand process connection.Electrical connections are made within the housing, which has a screw on sealed lid and cable gland.A choice of paddle sizes is supplied with each switch and selection can be made with reference to the chart below.TechnicalElectricalFeatures• Stainless steel SS304 paddle• 3/4”BSP or 1”NPT mounting plug thread• IP65 Aluminium alloy housing or DIN 43650 connection • Use for flow detection in pipes from 1” bore to 3” bore• Maximum operating pressure 20 barHousing materialAluminium Alloy Paddle material 304grade SS Temperature range See chart below Maximum pressure 20 bar Set point tolerance ±25 %Pressure drop0.2 barConnection in housing or byDIN 43650Mounting thread1”NPT STANDARD PARTSAll ratings are for resistive load only.Page 2CONTACT USCynergy3 Components Ltd.7 Cobham Road,Ferndown Industrial Estate, Wimborne, Dorset,BH21 7PE, United KingdomCopyright © 2021 Sensata Technologies, Inc.Sensata Technologies, Inc. (“Sensata”) data sheets are solely intended to assist designers (“Buyers”) who are developing systems that incorporate Sensata products (also referred to herein as “components”). Buyer understands and agrees that Buyer remains responsible for using its independent analysis, evaluation and judgment in designing Buyer’s systems and products. Sensata data sheets have been created using standard laboratory conditions and engineering practices. Sensata has not conducted any testing other than that specifically described in the published documentation for a particular data sheet. Sensata may make corrections, enhancements, improvements and other changes to its data sheets or components without notice.Buyers are authorized to use Sensata data sheets with the Sensata component(s) identified in each particular data sheet. HOWEVER, NO OTHER LICENSE, EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE TO ANY OTHER SENSATA INTELLECTUAL PROPERTY RIGHT, AND NO LICENSE TO ANY THIRD PARTY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT, IS GRANTED HEREIN. SENSATA DATA SHEETS ARE PROVIDED “AS IS”. SENSATA MAKES NO WARRANTIES OR REPRESENTATIONS WITH REGARD TO THE DATA SHEETS OR USE OF THE DATA SHEETS, EXPRESS, IMPLIED OR STATUTORY, INCLUDING ACCURACY OR COMPLETENESS. SENSATA DISCLAIMS ANY WARRANTY OF TITLE AND ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT, QUIET POSSESSION, AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHTS WITH REGARD TO SENSATA DATA SHEETS OR USE THEREOF.All products are sold subject to Sensata’s terms and conditions of sale supplied at SENSATA ASSUMES NO LIABILITY FOR APPLICATIONS ASSISTANCE OR THE DESIGN OF BUYERS’ PRODUCTS. BUYER ACKNOWLEDGES AND AGREES THAT IT IS SOLELY RESPONSIBLE FOR COMPLIANCE WITH ALL LEGAL, REGULATORY AND SAFETY-RELATED REQUIREMENTS CONCERNING ITS PRODUCTS, AND ANY USE OF SENSATA COMPONENTS IN ITS APPLICATIONS, NOTWITHSTANDING ANY APPLICATIONS-RELATED INFORMATION OR SUPPORT THAT MAY BE PROVIDED BY SENSATA.Mailing Address: Sensata Technologies, Inc., 529 Pleasant Street, Attleboro, MA 02703, USA.ISO9001CERTIFIED cynergy3-lfs-v3 Rev: 07/10/21Mechanical DimensionsRepeatability ±5% Connection in housing or by DIN 43650Contact Form SPDT Electrical Specification 180Model No.LFS-02/H Model No.LFS-03/H Model No.LFS-04/HModel No.LFS-01/H Made in the UK。
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水流开关使用说明书
概述：3S系列液体水流开关用于流经管道的液体流量变化，例如水、
乙二醇或其它非危害性液体。
当液体流量超过或低于设定的流量值
时，其单刀双掷开关触点（SPDT）可使一个回路导通，而同时切断
另外一个回路。
该水流开关通常使用在需要连锁作用或“断流”保护
场所。
典型的应用为当冷冻机系统中冷却水断流时，可有效的切断压
缩机电流，以保护冷冻机及整个冷冻系统的损坏。
⏹特点：
●液体压力可高达1MPa，使用范围广。
●不锈钢叶片有四，用于直径25~150mm通径的管路。
●可根据需要拆卸叶片的节数或修正叶片的长度。
●设定点可调整，用户可根据需要进行修整其流量值。
●外壳采用全封闭结构，对电器装置有效的防尘，防水汽（可能会有少量凝露）●电器开关为整件，封闭式，对少量凝露不会产生漏电的危险。
●接线空间大，方便用户接线。
技术参数：
●电器负载AC250V 15A AC380V 10A
绝缘电阻Over 100MΩ,DC500VM
耐压AC 1500V/1minute
触点寿命1000K 次
波纹管寿命5000K 次
最大压力17.5kg f/cm2(1750KPa)
工作压力10kgf/cm2(1000KPa)
●环境温度0~60℃
流体温度Max 100℃(212°F)，150℃
●防护标准IP53
接口规格DN15(1/2") DN20(3/4") DN25(1") NPT
重量0.7kKg
●3S流量开关可根据所安装总管线的管径，使用不同叶片。
⏹水流开关的安装
●3S系列水流开关采用NPT 密封螺纹管路接头，有1英寸、4分、6分三种规格，用户订货时选
择与管径配套的接头。
●外壳的箭头方向应与管路内流向一致
●水流开关应安装在水平管路上。
如必须安装在垂直管道上，则液体流向应向下往上流。
绝不允许
安装在自上往下流向的垂直管路上。
●水流开关在使用中绝不允许流向倒流，以免造成叶片反向断裂。
附：叶片修整图：
注意:带*的叶片为出厂时安装的
带∆的为附加的叶片（未安装）
其余尺寸为修正用
休整后的叶片安装时，其顶端不得与管壁有任何摩擦，且与管壁底部有5~10mm间隙接线图：
典型安装图：
⏹水流开关的调节
1、打开水流开关外壳；
2、开关出厂时已设定在约为最小流量值。
调高流量设定值，顺时针旋转调节螺丝①；
3、按动挡片来检查微动开关是否能正常工作，过多的逆时针旋转调节螺丝，可能导致流量开关失效；
4、安装结束后，请通过按动流量开关杠杆数次来检查，一旦发现杠杆回复时没有“咔嗒”声，顺时针旋转调节螺丝直到回复时有“咔嗒”声；
5、禁止取出调节螺丝固定夹②，否则将造成流量调节螺丝失效；
6、漆封的调整螺丝③仅供出厂调整水流开关状态，请勿改变或调节；
7、应观察三个工作周期，确定开关和与之连接的系统运转正常，并及时盖上开关外壳。
水流开关调节注意问题
水流开关上面的调节螺丝其基本作用是可以调节其灵敏度。
1.更精确地讲上面的螺丝③是用来调节微动开关的，一般建议请勿改变或调节。
2.下面的螺丝①是用来调节传感元件-波纹管松与紧的程度。
用户需要根据不同的水流量工况进行调节。
一般来説比调节成比较松的波纹管，不大的水流量就可以推动水流开关杠杆，并通过波纹管传递给微动开关。
使微动开关进行切换动作。
反过来调节成比较紧的波纹管，需要相对比较大的水流量。
才能推动水流开关杠杆，并通过波纹管传递给微动开关。
使微动开关进行切换动作。