his series diaphragm domestic gas meters are a new generation of diaphragm gas meters produced by our company, adopting the international advanced technology and equipment. They accord with GB/T6968-1997 “Diaphragm Structure Gas Meter” B level standard which equals to OIML R31-1995 standard.
The diaphragm gas meter adopts independent cassette mechanism and has the features of stable material, safely performance, high precision measurement, and long-life service.
Functions and Features
With independent cassette mechanism
High sensitivity and accurate measurement
Convenient installation, simple structure, less spare parts, and convenient maintenance
Key parts are made of import material
Anti-reversion function (can prevent counter from reversing)
Special craft handling, sealable, security, high level anti-corrosive, and long life service.


NAME OF PARAMETER MODELS
SD-SJ1.6 SD-SJ2.5 SD-SJ4.0
Accuracy class B B B
Permissible Error Qmin≤Q＜0.1Qmax ±3%
0.1Qmax≤Q＜Qmax ±1.5%
Nominal flow-rate 1.6 M3/h 2.5 M3/h 4.0 M3/h
Max flow-rate 2.5 M3/h 4.0M3/h 6.0 M3/h
Min flow-rate 0.016 M3/h 0.025 M3/h 0.04 M3/h
Cyclic volume 1.2 dM3
Total pressure loss Less than 200Pa
Operation pressure range 0.5—50kPa
Max. counter reading 99999.999m3 99999.999m3 99999.999m3
Min. counter reading 0.001 m3 0.001 m3 0.001 m3
Distance between inlet & outlet 130 mm/110mm
Ambient Temperature Range -30 ~ 50 ℃
Storage Temperature 5 ~ 40 ℃
Service life 12Y
Applicable Gas Natural gas、Liquefied petroleum gas、Artificial coal gas、Air、Inert gases