Application
The G40 diaphragm meters are used for application requiring high 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
They are designed for use with natural gas, manufactured gas and other non-corrosive gases
The G40 diaphragm meter are approved for fiscal use
Operating Principle
The movement of the diaphragm is caused by the pressure difference between the inlet and outlet of the meter. The reciprocal filling is controled 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 a stuffing box
Diapragm meter is amde of four main parts :
- The measurng unit mainly consisting in :
– four measuring chambers
– Two sliding valves
– An outlet pipe - A steel casing where 1 or 2 connectors re fitted
- A magnetic coupling or a stuffing box transmits the movement of the measuring unit to the totalizer
- A totalizer is available in different versions depebding on the applications
Technical Specifications ;
- Gas type : natural gas air, propane, butane, nitrogen and all nn-corrosive gases
- Cyclic Volume : 30 dm3
- Temperature range :
– Ambient ; -25°C to +55°C
– Gas : -25°C to +55°C
– Storage = -40to +70°C - Maximum working pressure : 0.5 bar ( 1 bar optional)
- Flow Range ;
– Qmin : 0.4 m3/ h
– Qmax : 65 m3/ h - Accuracy : Class 1.5
- Approval : MID (04/ 22/ EC) module B, DE -10- MI002-PTB004 Rev. 1 and EN 1359 ; 1998 + A1 : 2006
- Totalizer : IP 54
UV resistnt cover
Fitted with a reflecting dic on the frist drum to facilitate periodical checks
Customized name plates : bar code, customer serial number or logo - Magnetic Coupling Stuffing box : The meter is equipped as standard with a magnetic coupling
As an alternative a stuffing box : can be also installed - Connections :
– Single pipe or 2 pipe connections
– From DN40 to DN80 depending on the G-size
– Vertical or horizontal connections for the G40
– Other connections are available in request - Material
– Steel sheet, drawn or welded depending on the G-size
– The use of a powder-coated painting guarantees long term protection againts corrosion
– All the casings are of screw type to allow easy maintenance on the meter no crimped casing