D what's the meaning of "one 71x one 1 butterfly"?
According to the provisions of the JB/T 308-2004 valve type programming method:D== butterf...
What is the butterfly valve
From the working principle of double butterfly valve can be seen that the operation is sim...
Buried extension butterfly valve is buried directly, or need to repair the valve well?
It is better to set up the valve well for repairing the valve later;If it is extended to r...
Is the pressure test of the centerline butterfly valve checked or checked?
The pressure test of the central butterfly valve is carried out at each station.Basis:1) G...
Tight valves?
unless they have been tampered with that wouldn't be it,they usually wont tighten up on th...
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Wafer And Lug Type Butterfly Valves

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