Description
The Series “PS” valve is pilot-operated and normally closed by design. It requires line pressure and flow for operating assistance. Under the correct pressure conditions the coil, when energized (power on), creates an electromagnetic field in the top section of the core tube. This force pulls the core and pilot seat upward, opening the pilot valve. The liquid pressure above the diaphragm is then vented through the open orifice of the pilot valve to the downstream piping. At this moment, the inlet pressure under the diaphragm lifts the diaphragm and opens the main valve orifice, thereby permitting full flow through the valve. When the coil is de-energized (power off), the pilot solenoid spring (not in the wetted area) pushes the core and pilot seat downward, closing the pilot valve. This causes pressure above the diaphragm to rise to inlet pressure level, forcing the diaphragm downward against the main valve seat sealing the valve. Note – Series “PS” solenoid valves require a minimum differential pressure of 5 PSI to operate properly.
For an instructional video on these valves please click HERE.
