Solenoid Valve Materials

Solenoid Valve Material

Solenoid control valves are made from many materials, normally each material being chosen for its chemical properties and its cost. The base material of a solenoid valve is not only chosen due to the media it will control, but sometimes also the environment that it will be deployed into. Such environments may be hazardous or sterile. In each such case the correct base material must be used for the solenoid valve.

Brass Solenoid Valves

Brass solenoid valves will have a brass body and a combination of brass and stainless steel internals, which in most cases will come into contact with the media passing through the valve. Typical sealing materials are NBR with options for EPDM, FKM or PTFE which are suitable for most compressed air, water, potable water, vacuum, steam, mineral and vegetable oils and most other non corrosive and non aggressive liquids and gases. Pressure ranges typically from 0 to 200 bar

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Stainless Steel Solenoid Valves

Stainless steel solenoid valves will be constructed from either AISI304 or AISI316 stainless steel with an internal mix of various grades of stainless steel from AISI302, AISI304 and 430F stainless steel. which in most cases will come into contact with the media passing through the valve. Typical sealing materials include FKM, NBR, EPDM, FFKM, PTFE, HNBR and with some other more specialised sealing materials being available as stainless steel has excellent chemical resistance. Typical media applications include air, water, pure water, reverse osmosis water, de-mineralised water, slightly aggressive and corrosive acids and alkali's and steam. The natural corrosion resistance makes this type of valve ideally suited to the food, chemical and petrol-chemical industries. Pressure ranges from 0 to in excess of 500 bar.

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Bronze Solenoid Valves

Bronze bodied solenoid valves will have a mix of bronze and AISI302, 304 and 430F stainless steel internal parts, which will all come into contact with the media. Bronze has good resistance to wear and is structurally much stronger than brass and less expensive than stainless steel. Typical sealing materials are PTFE and a range of elastomer materials. Typical media applications include high pressure steam, sea water, hot water, fuel oils, petrol and diesel. Pressure ranges typically from 0 to 20 bar maximum.

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Plastic Solenoid Valves

Plastic solenoid valves are available in a variety of materials from low cost nylon valves for general purpose water, domestic appliance and agricultural systems, through to PVC, PP, PVDF and PTFE bodies plastic valves for very aggressive and corrosive acids and alkali's. Plastic solenoid valves offer lightweight cost effective solutions for liquid and gas control but as plastic is structurally weak in comparison to metal will suffer from low working pressures from typically 0 to 10 bar maximum.

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