真空释放阀说明书

SFF508型压力真空释放阀
SFF508 Press/Vacuum Release Valve
使
用
说
明
书
Operation Instruction
江苏国能环保设备有限公司
Jiangsu Guoneng Environment Protection Equipment Co,. Ltd.
目录
Contents
产品型号、名称 (2)
Product model, name
外形图 (2)
Outside drawing
用途和适用范围 (2)
Function and applicable range
主要技术参数 (2)
Main technical parameter
结构与工作原理 (3)
Structure and working principle
一、产品型号、名称
1. Product model, name
1.型号：SFF508
1.1 Model: SFF508
2.名称：压力真空释放阀
1.2 Name: pressure/vacuum release valve
二、外形图
2. Outside drawing
三、用途和适用范围
3. Function and applicable range
1.用途：
3.1 Function:
在充气、排气和不正常的温度变化时，保护容器不受过量的正压和负压。

In the case of gas filling, exhausting and abnormal temperature variation,
it can protect the vessel from excessive positive pressure and negative pressure.
2.适用范围：
3.2 Applicable range:
1）在容器正常通气时，延迟气化物的逃逸以降低有价值的蒸发气的损失；
3.2.1 In the case of normal ventilation of vessel, delay the escape of gasifying agent so as to reduce the loss of valuable vapour.
2）在贮存产品时，保持惰性气体密封层；
3.2.2 When storing products, it maintains the seal course of inert gas.
3）在处理因外部热源引起内部压力过量时，作为优良的二次或备用保险。

3.2.3 When processing the excessive internal pressure caused by external heat source, it acts as excellent secondary or spare insurance.
四、主要技术参数
4. Main technical parameter
1. 压力真空释放阀型号含义：
4.1 Meaning of pressure/vacuum release valve model:
SFF 508
入口尺寸Φ508mm
Inlet dimension Φ508mm
压力真空释放阀
Pressure/vacuum release valve
2. zhu主要技术参数表：
4.2 Main technical parameter table:
五、结构与工作原理
5. Structure and working principle
1. 结构
5.1 Structure
SFF508型压力真空释放阀由阀座（件1）、阀盖（件4）、档环（件3）、
档环弹簧（件2）、真空环（件5）、隔膜（件6）、柱销（件7）等组成。

SFF508 pressure/vacuum release valve comprises of valve seat (part 1), valve cover (part 4), retaining ring (part 3), retaining ring spring (part 2), vacuum ring (part 5), diaphragm (part 6), pin (part 7) and so on.
2. 工作原理
5.2 Working principle
1）静止位置（密封时）：
5.2.1 Resting position (when sealing):
当储料仓（或灰库）内部压力维持在阀选定的压力值内时，阀盖保持静止位置。

由于储料仓（或灰库）内压力产生一个力作用于柔性隔膜（件6）顶面使隔膜紧密接触到阀座（件1）上，从而达到密封。

When the internal pressure of storage bin (or ash silo) maintains within the pressure value selected by the valve, the valve cover keeps at the resting position. As there is a force produced by internal pressure of storage bin (or ash silo) being applied to the top surface of soft diaphragm (part 6) to make the diaphragm closely contact with valve seat (part 1), so that the seal is achieved.
2）压力释放：
5.2.2 Pressure release:
当储料仓（或灰库）压力增长到阀选定的压力值时，仓内压力克服阀盖（件4）重量，将阀盖从阀座上举起，同时压力放空，直到储料仓（或灰库）内部压力将到与阀所选定的压力值相同时，阀盖再回到正常位置。

When the pressure of storage bin (or ash silo) increases up to the
pressure value selected by the valve, the internal pressure of bin gets over the weight of valve cover (part 4) to lift the valve cover up from valve seat, at the same time, the pressure is released until the internal pressure of storage bin (or ash silo) reaches up to the same pressure value as that selected by the valve, then the valve cover returns to normal position.
3）真空释放：
5.2.3 Vacuum release:
当储料仓（或灰库）内部压力低于大气压力时，在储料仓（或灰库）内部产生真空。

当将到与阀选定的真空值时，由于大气压力作用到隔膜上，举起真空环到浮动位置，此时空气进入储料仓（或灰库），直到储料仓（或灰库）内真空值小于选定值时，真空环回到正常位置，靠在隔膜上。

When the internal pressure of storage bin (or ash silo) is lower than atmospheric pressure, it will produce vacuum inside of storage bin (or ash silo). When it is to reach to the vacuum value selected by the valve, the vacuum ring will be lifted to the floating position due to the effect of atmospheric pressure on diaphragm, so the air enters into the storage bin (or ash silo) until the vacuum value inside of storage bin (or ash silo) is smaller than the selected value, the vacuum value returns to the normal position, leaning against the diaphragm.。