Buy Pneumatic Solenoid Valve
These True pneumatic solenoid valves are direct acting. They have an upper and lower diaphragm separating the liquid from opposing springs. They are constructed of Geon PVC with Viton or EPDM diaphragms. External fasteners are stainless steel (no metals in wetted area). Available in 1/4" and 1/2", the THP has a CV rating at .31 with a 1/8" orifice, .52 with a 3/16 orifice, and .61 with a 1/4" orifice. Valve performs to 1,000,000 cycles with EPDM diaphragms (Viton diaphragms perform to 100,000 on Series THP). After 1,000,000 cycles (100,000 for Viton), we recommend that the valve be disassembled and inspected. It is also recommended to replace the elastomer seals and u-cups at this point. Contact your distributor for a seal kit. For heavy use applications, you may wish to order a spare seal kit with the valve. Seal replacement takes but a few minutes with common tools no special training is required. In the 3 HVAC valve way the Valve Body is Cast Aluminum but the steel Poppets and Seats are enclosed in a steel sleeve. All materials are compatible with Turbine Engine Fuel, Diesel Oil and Gasoline. The3 way solenoid valve is designed to take advantage of 14 to 30 VDC opening Voltage and to securely hold the Valve in place with only 8 VDC, a feature required to conserve power and to minimize heat. The stainless steelsolenoid Valve provides both relieving and checking functions. It is isolated in the line from Lines to Port #3. The Poppet and Relief Valve employs an entrapped "O" ring as the seal. Total stroke of the Valve is .021 inches. The opening and closing response times are therefore quite low, on the order of 20 ms or less. The Solenoid has a 30 ohm resistance at 76 degrees F and draws 1.36 amps at -70 degrees F. All "wetted" surfaces are either Stainless Steel, Aluminum or Nickel Plated for corrosion protection. All the working and services are provided by the HVAC and the HVAC service valve are best in its working as it has the longer life and durability.
True pneumatic valves have lower and upper diaphragms. These diaphragms are used for separating liquid from opposing springs. Constructed of geon PVC with viton or EP DM diaphragms, True pneumatic valves are designed to last. Stainless steel external fasteners are used as other types of metal are prone to rust. They are available in 1/4 inch and 1/2 inch sizes. True pneumatic valves have a CV rating of 0.31 with a 1/8-inch opening. With a 3/16 inch opening, they perform at 0.52 CV. A 1/4-inch opening performs at 0.61 CV.
True pneumatic valves are designed to perform 1,000,000 cycles with EP DM diaphragms. When using other pneumatic valves, performance of only 100,000 cycles can be expected. After 1,000,000 cycles, the manufacturer recommends that the valve be inspected after it has been disassembled. The elastomer seals and u-cups should be replaced as well. At HVAC Plus, we offer the seal kit. Those who use their True pneumatic valves heavily may wish to have spare seal kit on hand. Special expertise is not needed to perform this replacement; common tools can be used, and it only takes a few minutes to replace the seal.
The three-way HVAC valve is built from cast aluminum. Steel seats and poppets encased within a sleeve made of steel. Compatible with diesel oil, gasoline and turbine engine fuel, this valve is known for its ruggedness and reliability. In addition, the solenoid valve can work in temperatures ranging from 14 to 30 VDC, but the valve can be held in place with only eight VDC, which allows for substantial energy savings. The valve has a total stroke length of 0.21 inches and response times are 20 ms at most. At 76 degrees Fahrenheit, this solenoid has 30 ohm resistance.
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