Manual Diaphragm Valves

Manual Diaphragm Valves 1/2˝ - 6˝ PVC, 1/2˝ - 4˝ CPVC, 1/2˝ - 10˝ PPL, 1/2˝ - 8˝ PVDF GENERAL DESCRIPTION Overview Hayward all-plastic diaphragm valves are engineered to provide superior handling of difficult media such as corrosive fluids, abrasives and slurries. They can also be used for high purity and sanitary applications. Manual or Automated Available in manual or actuated (pneumatic or electric) models, the valves can be used for on/off and throttling service, feature a multi-turn design for precise control, and are self-draining on one side so that little to no dead volume remains in the valve. Standard material choices for the valve’s body include PVC, CPVC, PVDF and PPL. Each are available with EPDM, FPM or PTFE diaphragms, allowing service in a wide range of applications. Superior Design, Superior Performance The valve controls flow by varying the space between a stationary weir and a moveable flexible diaphragm. By compressing the diaphragm against the weir, all flow is shut off. The only wetted components are the lower half of the valve body and the diaphragm. The diaphragm’s stroke adjustment feature allows precise “tweaking” of diaphragm movement for very precise flow control. A large, sure-grip handwheel makes it easy to open or close the valve, and a beacon-type indicator provides highly visible position indication at the top of the valve’s rising stem. Connection Options Connection options include molded-in ANSI flanges and ASTM True Union socket end connectors.

Manual Valves Overview

TB Series True Union Ball Valves

Solenoid Valves

True Union Solenoid Valves - NPD Design 1/4" to 1" - PVC, and Corzan® CPVC GENERAL DESCRIPTION No Pressure Differential Design: For maximum application flexibility these heavy duty solenoid valves have been designed so that no pressure differential is needed for them to operate reliably. Their unique design eliminates problems such as sticking and "chattering" due to system pressure differentials that can effect ordinary solenoid valves. And their performance is not affected by downstream restrictions caused by nozzles, flow meters or other equipment. This is a real benefit in these types of applications. The valve will operate with up to 40 PSI of backpressure and up to 120 PSI of inlet pressure. There are no minimum pressure requirements. Normally Closed Operation: When electric power is applied to the solenoid, the electromagnetic coil is energized, opening the valve. When the coil is de-energized, the valve closes. Innovative Coil Design: Unique in design, the valve coil rectifies AC current to DC current, resulting in lower coil operating temperatures than other plastic solenoid valves. This permits the coil to be rated for 100% continuous duty applications. Thus, the valve can be left in the open position indefinitely or it can be cycled continuously with no coil damage. Unique Seal Cartridge: Hayward Solenoid Valves feature an easy to replace seal cartridge. No fumbling with small parts and o-rings to replace worn seals. Just install the one-piece cartridge containing the plunger assembly and all of the seals. Corrosion Resistant Coil: The powerful coil assembly and electronics are completely encapsulated in a molded polyester housing, resistant to the harsh corrosive environments to which solenoid valves are often exposed.

Swing Check Valves

Swing Check Valves 3" to 8" - PVC, Corzan® PVC and PPL GENERAL DESCRIPTION Twice the Temperature/Pressure Rating of Other Plastic Swing Check Valves: Hayward Swing Check valves have up to twice the temperature/pressure rating of other plastic swing check valves, and can replace metal valves in many applications. Compare the temperature/pressure rating of Hayward Swing Check Valves to others and see the difference. Unique Two-In-One Seat Design: Swing check valves are often used with slurries or other liquids that can damage the valve seat. A damaged seat in an ordinary swing check results in a useless, destroyed valve. But not with Hayward Swing Check Valves. They feature a unique two-in-one seat design that doubles the valve's service life. The valve body is constructed from two identical halves. If one seat is damaged, simply re-position the clapper so that it seats against the other body seat. Then reverse the valve in the pipeline. Now the valve is again ready for service.