Application :
The G525 diaphgram meters are used for application requiring high precision and large rangeability at low pressure (below 1 bar gauge)
Due to the volumetric principle of the diaphragm meter, its metrology is not influenced by installation conditions
The are designed for usu with natural gas, manifactured gas and other non-corrosive gases
The G25 diaphragm meter are approved for fiscal use
Operating Principle :
The movement of the diaphragm is caused by the pressure difference between the inlet and the outlet of the meter. The reciprocal filling is controlled by means of 2 sliding valves.
This oscillating movement is transformed into a rotational one and is mechanically transmitted to the totalizer through a magnetic coupling or stuffing box.
- The measuring mainly consisting in :
– Four measuring chambers
– Two sliding valves
– An outlet pipe - A steel casing 1 or 2 connectors are fitted
- A magnetic couling or a stuffing box versions depending on the applications
Technical Specifications :
- Gas type : Natural gas, air, propane, butane, nitrogen and all nn-corrosive gases
- Cyclic Volume : 20 dm3
- Temperature range :
– Ambient : -25°C to +55°C
– Gas : -25°C + 55°C
– Storage : -40°C + 70°C - Maximum working pressure : 0.5 bar (1 bar optional)
- Flow Range :
– Qmin : 0.25 m3/h
– Qmax : 40 m3/ h - Accuracy : class 1.5
- Approval : MID (0.4/22/EC) module B, DE-10-MI002-PTB004 Rev.1, and EN 1359:1998 + A1:2006
- Totalizer : IP54
UV resistant cover
Fitted with a reflecting disc on the frist drum to facilitate periodical checks
Customised name plates : bar code, customer serial number or logo - Magnetic Coupling Stuffing Box : The meter is equipped as standard with q magnetic coupling
As an alternative a stuffing box can be also installed - Connections :
– Single sheet, drawn or welded depending on the G-size
– The use of a powder-coated painting gurantees long term protection againts corrosion
– All the casing are of a srew type to allow easy maintenance on the meter no crimped casing.