I am using Bellow Sealed Type Manual Flow control Valves for a Thermic Fluid Circuit
I need to know the following with respect to manual flow control valves:-
1.Should the valves be one size lower than the pipe size?
2. What should be the pressure drop across the valve for a good flow control...
i have got an offer for socket welded end bellow sealed globe valve from a german company aws follows
1 . valve size - 1/2 ' to 1 1/2"
2. Valve class rating :- class 300
3. valve material :- ASTM A 105
4. Ends :- Socket welded type
Can the valve class be correct.
the party is a reputed...