2019 Breeze Jan-Feb

KING SOLENOID VALVES: Prevention of Liquid Trapping

Peter Thomas, P.E., LEED AP President | Resource Compliance, Inc.

In many industrial refrigeration systems, the main liquid feed shut off valve (King Valve) can be remotely controlled as a solenoid valve that is interlocked with the computer control system. The typical configuration of a king solenoid valve assembly includes the following four (4)

components, listed in the direction of flow: Upstream Isolation Valve Strainer King Solenoid Valve Downstream Isolation Valve

This arrangement can offer many advantages over a manually-operated King Valve, but it is important to consider the proper operation of the valve assembly should one of the two manual valves need to be operated in an emergency.

18 RETA.com