印度水表技术要求

b) 6% on successful completion of each yearly maintenance period for first 5 yrs and 10% on

successful completion of each yearly maintenance period for last 2 yrs.

26.2 Earnest Money deposited by the firm at the time of bidding for the contract will be adjusted

against security deposit.

27.0 ADDRESSES FOR CORRESPONDENCE:

Any correspondence pertaining to this Tender will be addressed to Delhi Jal Board at the address given below:

Executive Engineer (Project) W-I

Delhi Jal Board (Govt. of NCT of Delhi),

511, Varunalaya, Phase- I.

Jhandewalan, Karol Bagh,

New Delhi – 110005 Ph.: 23681009,

Technical Specifications

RESPONSIBILITY OF WATER METER MANUFACTURERS / DISTRIBUTORS :

1. To design, manufacture, test, supply and give technical support / service to the civil contractors

and submit a full fledged detailed scheme, technology & methodology for taking remote water meter readings of the AMR water meters installed on DJB connections.

2. The DJB may suggest certain modifications such as software, different attributes and facilities

required in Hand Held Device i.e. AMR reading device and operating software, etc. The AMR meter manufacturer shall implement / incorporate all the modifications & suggestions as suggested by the DJB without any extra cost.

A) Non AMR Water meters

2.2 Applicable Standards:

Water meter straight reading means – 15mm size domestic water meters, inferential type, multi jet, magnetically coupled, having dry dial, Class ’B’ conforming to IS-779: 1994 with up to date amendments or ISO 4064:1993 standard with ISI/EEC/OIML/MID certification mark shall be with protection class of IP-68.

The meters shall be supplied complete with G I fittings, brass nuts and brass nipples. Strainer & sealing shall be provided as per relevant IS provision.

2.3 Material of construction:

a) The manufacturer shall provide specific details of materials used for various parts of

the meter which must meet the specifications for the material of construction of the

individual parts of the meters as per IS 779:1994 (latest amendments) or ISO 4064:

1993.

b) The body of the meter shall be of either Brass or Bronze. The firm shall specifically

mention in the offer, the metal used in manufacturing. Material that come in contact

with the water supply shall withstand 2 ppm (parts per million) of chlorine residual in

the water supply and shall be resistant to corrosion.

c)The water meter and accessories shall be manufactured from materials of adequate

strength and durability. The materials, which come in contact with the potable water,

shall not create a toxic hazard, shall not support microbial growth, and shall not give

rise to unpleasant taste or discoloration in the water supply. However, the spindle and

bearings inside the hydraulic chamber shall be made of polished stainless steel with

hard metal tip/ sapphire.

d)The internal pressure cup shall be made of low-ferrous brass not exceeding 0.02% Fe

contents / Engineering plastic. Furthermore the internal pressure cup should overlap