Occasionally, manufacturers will make stainless steel seals. Seals, like viton seals or nbr seals, are usually made from some sort of rubber. Valves may be made from both plastic and metal materials, such as PVC, natural polypropylene, PTFE, CPVC, stainless steel, bronze, aluminum, and brass. Manufacturers have a wide variety of materials available to them with which to construct their solenoid valves. These components include: the solenoid valve coil, the valve, an inlet port, an outlet port, a spring, an orifice and an actuator. Once they’ve fabricated the valve components, they assemble them. Manufacturers produce solenoid valves via a variety of processes, such as: CNC machining, laser welding, injection molding and coil winding. Today, much of valve fabrication and use innovation is focused on health and sustainability. Today, newer standards also restrict the use of hazardous substances in valve fabrication, so as to improve their environmental friendliness. In the 1990s, governments around the world, as well as independent organizations, began creating solenoid valve standardizations, which enabled a higher frequency of international trade, easier collaborations between companies and easier maintenance. 1 ELECTRIC SOLENOID VALVE MANUALFor instance, starting in the ‘70s, manufacturers began producing automatic shut-off solenoid valves, which were safer and easier to operate than manual control shut-off valves. This trend of improvement continued on into the late 20th century. Miniature Solenoid Valves – International Polymer Solutions
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