Collection:Plastic Solenoid Valves

Plastic 2/2-way solenoid valves are lightweight on/off valves that do not rust. Polyamide (nylon) valves are a low-cost choice for water. PVC, PP, PVDF, and PEEK valves are for sea water, demineralized water, and some dilute acids and bases.

Housing material

• Polyamide (PA, nylon): the most common plastic housing, for water in machines and water treatment.
• PVC: for sea water and some dilute acids and bases, up to approximately 60 °C (140 °F).
• PP: for some acids and bases, also at higher temperatures than PVC.
• PVDF and PEEK: for higher temperatures and for media that PVC and PP do not resist.

Check that both the plastic and the seal resist the chemical at its concentration and temperature.

Operating principle

Most plastic valves are indirect-acting or semi-direct. Below typically 0.2 to 0.5 bar (3 to 7 psi) of pressure difference, an indirect-acting valve does not open fully. For water from a tank, choose a semi-direct or direct-acting valve.

Connections

Plastic solenoid valves have a thread (usually BSP), solvent-weld sockets that connect directly to PVC pipe, or push-in connections for plastic tube.

Seals

• Water and hot water: EPDM.
• Cold water and compressed air: NBR.
• Oil and fuel: FKM.
• Very aggressive chemicals: FFKM, on some versions.