Rotary piston gas meters are manufactured for pressure stages pmax 10 bar, 16 bar. The pressurized parts within the gas meter are made of nodular cast iron, up to size G 1000 the rotors are made of anodized light alloy, above G 1000 they are made of grey cast iron. The anodizing layer achieves a considerably higher resistance to wear of the piston surface.

Oversize bearings and ground timing gears ensure quiet vibration-free operating. A frictionless and pressure tight magnetic coupling transmits the rotation from the pressure chamber to the drive shaft of the counter mechanism. This shaft carries the magnet core and drives the counter mechanism in its isolated housing.

The counter mechanism features a closely stepped adjusting gear and 8 counting wheels.

The gas meters up to size G 400 are flange mounted. Larger gas meters feature bolted-on mounting feet.

All Aerzen gas meters meet the requirements of DVGW-sheet G 492/II and DIN 30690 T 1, DIN 3230 T 5 and pressure devise guideline DGRL 97/23/EG. They are subject to the pressure and leakage tests prescribed by these standards.
The housing materials correspond to the requirements of DIN EN 13445-2 with PED-QM certification with acceptance test certificate EN 10203/3.1.B.

Aerzen rotary piston gas meters already now meet the essential requirements of the future European Rotary piston gas meter standard EN 12480. Until this standard becomes binding the previous legal regulations (calibration law, calibration order) apply, according to which the Aerzen Maschinenfabrik manufactures, tests and approves its products. Works certificates for tests acc. to EN 12480 can be issued on request.

Gases

Aerzen gas meters can be used with any non-corrosive gas according to DVGW-worksheet G 260, including natural gas, town gas, coke oven gas, refinery gas, propane, butane, liquid gas/air mixtures, methane, ethylene, hydrogen and other gases.

Operating temperature

The normal operating temperature range is between -10 °C and +40 °C. Please contact our sales department for higher or lower temperatures. The gas meters can be stored at temperatures of up to +60 °C.

High Temperature Resistance  (HTB - 5 bar)

In the case of a fire, the gas meter must not be an additional hazard. Therefore, the Aerzen gas meter sizes G 40 to G 400 are designed to fulfil the HTB-requirements of DIN 3374.

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