Looking for Gas Proving System Design

Can you describe what is to be proved about the natural gas? Pressure, flow, that it's natural gas rather than something else, etc.? I'm not familiar with your context.

Hi ,

You can use a Z meter Configuration ( Two Ultrasonic Flow meter ), One for measuring and other for Verifying .

Package Vendor Provides Info ( P& ID )

Regards

Jose

There are several systems available on the market. I am presuming that you are doing a valve proving step as part of a gas or oil burner start up.Try googling the Durag AD2H, but there are a number of them on the market. Get a TUV approved one.

A good standard to read, because it is by far the best, is the Australian AS3814. You could also use the American NFPA 85. Section 1 Single burners or Section 2 multiple burners.

The device is normally fitted just prior to the burners. The wiring does not need to be anything special. This is not a hazardous zone. If the above does not cover your question, be more specific.

If by gas proving system you mean a system which checks that the gas valves on an automatic burner are not letting gas leak passed them then forget designing one and buy one off the shelf which has been through an approvals house for testing. Dungs, Kromschoder and Honeywell all make them. One of the Dungs units simply bolts onto the side of their multiblock twin solenoid and governor.

Can anyone explain the principle of valve proving system . I am using DUNGS vdk 200 a so6 model.

SOS any1 ?

A gas meter prover is a device which verifies the accuracy of a gas meter.

A paper "Onsite Proving of Gas Flow Meters" provides an overview and cites references.

www.asgmt.com/default/papers/asgmt2009/docs/032.pdf‎

We are not discussing a gas meter prover. The gas proving system has already been adequately described. It consists of a double block and bleed (sometimes called a vent). It's purpose is to ensure that when the gas fired boiler is not on, there is no leak into the combustion chamber that could cause an explosion when the burner is restarted. I have already detailed the codes that describe the procedure. Use the Australian one. It is more detailed than the American one. Dare I say that the Americans tend to put the procedure into a non SIL rated control system. The proving system should be the automatic procedure immediately before a boiler purge. Imagine the two main block valves in series with the vent valve between them. A pressure transmitter measures the pressure between the two block valve. No, we do not use a pressure switch on a good design. The procedure is. Close the vent valve. Check that the pressure does not increase between the block valves. If it does the first block valve is leaking. If there is no pressure increase briefly open the first block valve, then close it. Check that the pressure does not decay. That tests vent and second block valve Open vent valve. Test over. All valves must be ball valves.