Gate valve stem in Horizontal position
Gate valve stem in Horizontal position
(OP)
Dears
As per Saudi Aramco Standard SAES-J-600 States " When gate valves are used as block valves for Pressure safety valves,they shall be installed with the stem horizontal or sloping down away from the relief valve to keep the gate from falling off and blocking the flow.".
What is the logic behind the above statement. If the Block valve stem is in vertical position what will happened? Your advice please...
Thanks
Nasim
As per Saudi Aramco Standard SAES-J-600 States " When gate valves are used as block valves for Pressure safety valves,they shall be installed with the stem horizontal or sloping down away from the relief valve to keep the gate from falling off and blocking the flow.".
What is the logic behind the above statement. If the Block valve stem is in vertical position what will happened? Your advice please...
Thanks
Nasim





RE: Gate valve stem in Horizontal position
This statement is copied from API 520 Pt2 (ref 8.3.2).
RE: Gate valve stem in Horizontal position
RE: Gate valve stem in Horizontal position
I suppose the potential is always there for a gate to fall off, but it is a pretty rare event.
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RE: Gate valve stem in Horizontal position