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While valve bodies are generally either thermoplastics or fluoroplastics, and seals are generally thermoplastic elastomers, many plastic valves use metals in some fashion. In a properly designed valve, these metals have no contact with process media and minimal external exposure. Valve bodies that are not threaded together require a fastener of some type; the best combination of strength and resistance is a stainless steel fastener. In many cases valve bodies are threaded together to eliminate the need for external fasteners, but in certain types of valves the fastener improves the design via added strength and rigidity. Pressure valves, for instance, tend not to perform as well if the body is threaded from two separate parts. Springs are used in fail-safe and automatic pressure valves (relief valves, pressure regulators, etc.) and are generally some type of steel; often stainless steel or other steel, determined by the spring rate and other specific properties required by the valve design and function.
Solenoid Valves use many other materials. In a good plastic valve design, these materials are intentionally isolated from any contact with liquid (unless specified in the design) but can have exposure to atmosphere. Solenoid core tube parts frequently include stainless steel, stainless steel with some ferrous properties, sometimes copper, silver, and other metal parts. Solenoid coils are generally some type of polyester and another plastic material. Some solenoid coils have metal housings. It is important to check the specifications for each valve to ensure that materials are compatible with your process and/or environment.
PVR as raw material and produce green environment protection products of PVR Pipes and Pipe . PVR are also used for :-
1) Cold, hot water supply facilities for public buildings
2) Food, chemical, electronic industrial pipeline networks such as pipeline networks for transporting .All kinds of corrosive liquid
3) Drinking water production system pipeline networks such as pure water and mineral water
4) Air conditioning facility pipeline
5) Compressed gas pipeline networks for industry
6) Pipeline network for swimming pool, solar energy facility
7) Agriculture and garden production transporting system
8) Healthy and non-toxic, bacterial neutral, conforming to drinking water standards
9) Resistant to high temperatures (110oC), with good impact strength (over 5MPa)
10) Unique and unrivaled German connection technique, convenient and reliable installation, low construction expense
11) Good heat preservation
12) Lightweight, convenient to transport and handle
13) Smooth inner walls reduce pressure loss and increase flow speed
14) Sound insulation (reduced by 40% compared to galvanized steel pipes) 15) Recyclable material
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