As per cited from Danfoss website, CVQ is an electronically operated constant-pressure pilot valve that functions together with the EKC 361 electronic system or an EKC 366 controller.
CVQ enables the electronic (and thus the remote) control of a ICS or PM main valve.
The CVQ valve is used to maintain a constant pressure at the ICS or PM main valve inlet side and can, via suction pressure regulation, very accurately control the temperature of a medium from an air or liquid cooler, etc.
Today, CVQ valve is widely used in Cold Room, Palm Oil Industry (shortening or margarine plant) due to it’s fast response toward changes of suction pressure.
Typical installation of CVQ valve