6ö MOV and gate valve fitting to fitting.
6ö MOV and gate valve fitting to fitting.
(OP)
I have a client who wants to install a 6” MOV and a gate valve fitting to fitting on a gasoline storage tank suction line. Is that could practice? Should there be a spool in between with a drain so when the tank is isolated (gate valve) the spool could be drained and the MOV could be replaced/repaired if required?





RE: 6ö MOV and gate valve fitting to fitting.
An open/close MOV won't require any more maintenance on fluid containing parts than any other valve and the Motor can be repaired without draining the tank.
Independent events are seldomly independent.
RE: 6ö MOV and gate valve fitting to fitting.
A spool is often useful to provide a support for these quite weighty valves and avoid propping the valve body itself. You can then also put in a thermal relief line draining into a drain or back into the tank.
Otherwise I agree with BI, the fact you're bolted to the isolation should make no difference as to whether you can take the MOV off. All yuo would need to do is hve a small drain pot when you crack the bolts - not too clever, but you're only doing this every few years. A spool would be better but you could find your drain valve seized closed due to inaction....
My motto: Learn something new every day
Also: There's usually a good reason why everyone does it that way