Thanks for all of your resonses.
As someone mentioned above, that "i/p is just the interface between the electronic signals and pneumatic." So, is the answer to the "when do I need I/P" is really: depends on what kind of actuator we select and what kind of signal the controller put out?
A...
I am just learning more details on control valves and its components. Since now I'm starting to see the real objects instead of on paper (P&ID), I've noticed things that I never thought of before such as:
1. Positioner on control valve. My understanding is so it's there to release/add air to...
Thanks for all the responses.
The solenoid conditions are:
Fluid: natural gas
Min P: 0 psig
Max P: 130 psig
Max Rate: 300 slpm
Line size OD: 3/4"
The vendor came back with:
Orifice size: 3/4"
Line Size: 3/4"
Cv=5.8 (per catalog, the title shows "Cv value water (gpm)")
So, when I calculated...
I'm about to purchase several solenoid valves (will be used as an ON/OFF valve). My questions are:
1. can someone inform me more on the solenoid valve. i.e. why we use it, when to use it and when should we not use it
2. The flow I sent the vendor is in slpm, and the fluid is gas (don't ask me...