Collection:3-Way Plastic Solenoid Valves

Plastic 3-way solenoid valves (3/2-way) switch aggressive media between 2 lines, often in analyzers, laboratory equipment, and dosing systems. Most are diverting valves, which send the flow to 1 of 2 outlets. For simple open and close, choose a 2/2-way plastic valve. The housing is PP, PVC, PVDF, PPS, PEEK, or PA.

Manual override and media separation

Many plastic 3/2-way valves have a manual override for tests without power to the coil. Many also have media separation: the medium touches only the plastic housing and the diaphragm, not the plunger or the plunger tube. This protects the moving parts and helps to keep the medium pure.

Connections

Available connections are NPT or BSP threads, UNF fittings, banjo connections, and solvent-weld sockets for PVC pipe.

Seals

• Compressed air, oil, and fuel: FKM, the most used seal on plastic 3/2-way valves.
• Water and hot water: EPDM.
• Cold water, compressed air, and oil: NBR.
• Very aggressive chemicals: FFKM.

For each chemical, check the resistance of the housing, the diaphragm, and the seal. Plastic 3/2-way valves are for lower pressures and temperatures than metal valves. Some solvents make plastics swell.