Pilot-Operated, Normally-Closed PTFE Bellows Seal Solenoid Valves Series PS

Features:

• 1,000,000+ cycle bubble-tight design; over 2,000,000 cycles has been achieved in field use.
• No metal parts in wetted area.
• Rugged thermoplastic construction.
• Patented Fail-Dry vented design.
• Resistant to atmospheric corrosion.
• Uses line pressure to assist operation, which allows extremely high Cv performance, as well as outstanding pressure ratings.
• Molded corrosion-resistant coil assembly.
• 11 watt/Nema 4X CSA approved water and dust tight enclosure.
• All valves are individually inspected and 100% tested.
• Optional coil connector light indicates when valve is energized.

Mode of Operation:
Requires 5 psi greater pressure at inlet to function properly. With proper differential, Series PS is normally closed (energize to open). Inlet pressure can be as high as 140 psi; backpressure (outlet) can be as high as 70 psi — as long as the outlet pressure is 5 psi lower through the entire operating range.

When the signal is sent to close the valve, it takes about a second for the pilot pressure to overcome the process pressure. Once the pressure is overcome, closure is instantaneous, and potential for water hammer must be considered prior to specification.

Service:
Designed for pressure service; suitable for drain applications as long as 5 psi differential is maintained. Not designed for vacuum service. Not suitable for liquids containing particulate unless a .007 filter is used. Not suitable for liquids which tend to precipitate solids.

Application:
Series PS automatically shuts off flow of highly corrosive and ultra-pure liquids. They can handle acids, caustics, solvents, chlorine solutions, sodium solutions, deionized water, reverse osmosis water, brewery processes, etc. as long as a 5 psi differential is maintained. Series PS is not suitable for solutions containing particulate matter or solutions that tend to precipitate solids. Care should be taken when processing liquids prone to crystallization, such as salt solutions, etc. The internal workings of the PS valve can be adversely affected by crystallization. If you have any questions, please contact our technical group at (973) 256-3000.

Design:
Valves are normally closed by inlet pressure on a diaphragm over the main orifice. When the valve is energized and the pilot orifice is opened, the pressure above the primary diaphragm is released downstream. Once this pressure is released, the pressure below the main diaphragm forces it to open. When the valve is de-energized, pressure is returned to the top of the diaphragm, forcing it to close. The action of the pilot and diaphragm result in a slight delay in the opening and closing, generally a second or two. (Note that without the 5 psi required differential, the pressure above the primary diaphragm will not be released, and the valve will not function properly).

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Watch>>>Introducing Plast-O-Matic Valves

Plast-O-Matic Valves, Inc.
When it comes to thermoplastic valves and controls, we are the problem solvers.
Founded in 1967, Plast-O-Matic Valves' ongoing mission is to provide unparalleled customer satisfaction while continually advancing the technology of liquid pressure and flow control. As the quality leader in the development of thermoplastic valves and controls for corrosive and ultra-pure liquids, POM provides a complete line of standard and custom designed solutions for difficult applications. The company is committed to product innovation, engineering excellence, precision manufacturing, 100% quality testing, and hands-on technical assistance. ISO 9001:2015 Registered.

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