The VQ400 Series class “A” safety combination valves are used for control and regulation of gaseous fluids in gas power burners, atmospheric gas boilers, melting furnaces, incinerators and other gas consuming appliances. These combination valves are available in two versions: model VQ420/25 (pipe sizes 3/4” and 1”) and model VQ440/50 (pipe sizes 1 1/2” and 2”). The 1 1/4” connection is obtained by using a DN32 flange kit on a VQ440 body. The features and specifications of both models are identical (unless specified otherwise).
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