CRL Pilot/Pressure relief Valve

Question 1

Normal position for CRL ?

Answer 1

…. CRL is normally closed (think a buildup of pressure will open and relief valve).
-> when controlling pressure exceeds spring setting, disc is lifted off of seat, permitting flow control.

• normally held closed by force of the compression spring above diaphragm, control pressure is applied under the diaphragm.

Question 2

On CRL, turning in the adjusting screw will ___________?

Answer 2

Increases pressure required to open the valve