Specifications
1. EN 1359 certificated
2. Diaphragm gas meter
This domestic diaphragm gas meters G4 is gas volume measurement instrument for coal gas, natural gas, LPG etc. It is designed and developed according to world advanced technology, based on our rich experience, with the merits of small size, light in weight, accurate measurement, high sensibility, low noise.
It is certified by Chinese standards GB/T6968-1997 and Internation Standard of OIML R137.
Features
1. Compact structure, big capacity of 1.2dm3 cyclic volume and beautiful appearance.
2. Apply Hot-printed technology of international leading level on register, which insures legible reading never fading.
3. Inside and outside of meter case is electro dusted, which insures good appearance, moisture-proof, gas corrosion-resistant and high Impact-resistant.
4. The measuring unit is made of Japanese Copolymerization of formaldehyde M90-44 (POM), injected by Mitsubishi machine; The high physicochemical properties, strong reliability, good self-lubricating property and compactness surpass other similar products remarkably.
5. The rubber diaphragm is made of Polyester fabric coated with nitride synthetic rubber, passed more than 200 Million times of Bally Test, oil-resistant change of mass is less than 65%, the flexibility is less than 0.45g/cm, the low temperature type diaphragm can work under -35° C ambient temperature. All specifications comply with National standard and International standard of OIML R311995.
6. The valve and vale seat are made of imported materials Z-41 Plastic pressure powder, which has been tested by foreign authority that the vale never distorts, has perfectly anti-function and high plainness after grind.
7. The material of register cover is Polycarbonate, which has strong impact resistance and keep the bolt falls into the track to withstand disassembly.
8. Special screw head and seal avoid illegal demolition.
9. Anti-reverse device completely prevents tampering.
10. The valve with 360° Rotation has the ability to resist impurity conglutinates and freezing, and has strong stability and agility; And high accuracy of low discharge.
11. The upper case and lower case are pressed by a steel band under a 40ton atmospheric pressure, which insures stability of sealing.
| Item | Unit | Mode |
| G1.6(S)D | G2.5(S)D | G4(S)D | G2.5(S) DW |
| Nominal flow-rate | m 3 /h | 1.6 | 2.5 | 4 | 2.5 |
| Max. flow-rate | m 3 /h | 2.5 | 4 | 6 | 6 |
| Min. flow-rate | m 3 /h | 0.016 | 0.025 | 0.04 | 0.016 |
| Total pressure loss | Pa | ≤200 | ≤200 |
| Operation pressure range | kPa | 0.5~50 | 0.5~50 |
| Cyclic volume | dm 3 | 1.2 | 1.2 |
| Permissible error | Qmin≤Q< 0.1 Qmax | ±3% | ±3% |
| 0.1Qmax≤Q≤ Qmax | ±1.5% | ±1.5% |
| Min. recording reading | dm 3 | 0.2 | 0.2 |
| Max. recording reading | m 3 | 99999.999 | 99999.999 |
| Working temperature |
| -10~+40 | -10~+40 |
| Storage temperature |
| -20~+50 | -20~+50 |
| Service life | Year | 10 | 10 |
| Connection thread |
| M30×2 | M30×2 |
| Central distance | mm | 110mm or 130mm or by customer |
|
| Weight | kg | 2.00 | 2.00 |
| Outside casing |
| Quality steel sheet | Quality steel sheet |
Storage And Installation Notices
1. Please keep the meters upward and avoiding collision during delivery process. The meter should be stored in a dry location without corrosive medium and with a temperature among -20ºCto 50ºC.
2. Installed where is off fire, no shaking, water and damp proofs, and no direct sunlight.
3. Please make gas system clean and seal before install the meter.
4. Please verify the right connection direction that is connector at the end of upper case arrow should be connected to gas supply pipe. Please install meter upward.
5. The tighten torque on connector should be less than 300 N.m.
A valve should be installed before inlet of meter in gas piping system.
Wuhan Radarking Electronics Corp. is a high-tech corporation which established in 2002. As professional manufacture in meters, our mainly products including: Full Digital IC Card Prepayment Electronic Meters, Smart Electronic Meters, IC Card Prepayment Water Meters, Gas Meters as well as Meter (network) Reading System. We are one of the few manufacturers in Hubei Province whose annual production of electronic meters and water meters can be up to 2.4 million sets.
Employee: There are more than 200 employees including 50 technicians, 10 senior technical staff and 70 employees who have already got college degree, 30 of them obtained metrological verification certificate. Production and technical staff all undergo a rigorous pre-service training, who are skilled and have a strong sense of quality.
Technology: We have a R & D group of 20 persons (About 10% of the company's employees).
Equipment: We have 260 sets of production and testing equipments, including 7 production lines, more than 20 units of the calibration device such as wave soldering machine, reflow soldering machine, automatic placement machine, plug-in assembly lines, assembly lines, packing lines and etc, which have all meet the production requirement.
Material: Materials are in strict accordance with the requirements of the meters and the procurement of national standards, we have already established a qualified supplier evaluation system, and developed a series of test standard. All the materials have to pass strict test before entering into factory, and then be used in production. Measures have been taken to prevent damp and static electricity to ensure the normal performance of the raw materials.
Craft: To make a variety of electronic meters in accordance with the production process, we have developed process documents, to ensure the quality of the products.
Test: We have electronic meter laboratory and full range of test equipments, such as EMC Equipment (ESD, EFTB, SURGE, RF, Attenuation Oscillasion Impulse, DIP, Impulse Current, Pulsed Voltage and etc), Environmental Test Equipment (Alternating Temperature Humidity Test Chamber, Dust Test Devices, Waterproof Test Device, Shock Test Device, Vibration Test Device and etc), R&D Testing Equipment. We make a variety of electronic meters in accordance with the test and develop our test documents to ensure the quality of the products.
Environment: Our production base covers an area of 30 acres, and self-building workshop covers an area of 7000 square meters, production and storage area covers more than 5000 square meters.
Management: We have a high efficiency, innovative, serious management team, and the factory has already passed ISO9001-2008 QMS.
