When you choose a pinch valve, it is essential to consider its material. A pinch valve’s body can be made of EPDM, Neoprene, or any combination of the two. While it is not necessary for the material to be compatible with the media that it is meant to handle, it is important to select an abrasion-resistant liner. This is because damaged materials can develop memory or protrude into the media stream, interrupting flow. This in turn causes pressure drops to increase, and can also lead to turbulence and abrasion on the liner wall.
EPDM
A Pinch valve made of EPDM rubber sleeve is ideal for shut-off control applications in fibrous media. It is designed to withstand up to 6 bars of operating pressure. This pressure is higher than the medium pressure and is therefore not a concern in high-pressure environments. The sleeve is operated through a G 1/4 inch female thread. Pressurized air squeezes the sleeve, forming a tight seal that prevents fluid from passing through it.
The life of the rubber membrane on a pinch valve depends on the number of daily cycles and location. In general, it will last longer than a butterfly valve. EPDM rubber pinch valves are also suitable for high-temperature environments.
Neoprene
The Neoprene pinch valve has a non-metal seat, body, and reinforcing jacket. These features allow it to close tightly over the contact area. The valve is able to handle a variety of fluids, and its non-metallic design also means that it can be used in food-grade applications.
Neoprene pinch valves come in a wide range of materials, including nitrile, EPDM, butyl, and natural rubber. Each material has its own set of characteristics, and is ideally suited for a particular application. Neoprene is particularly resistant to dilute solvents and mild chemicals, and is often used in food applications. Natural rubber is also suitable for applications involving weak chemicals and potable water. It is not, however, suitable for handling strong chemicals.
Casting process
Pinch valves are designed to control the flow of liquids in various applications. They contain a flexible elastomer sleeve that is enclosed in a metal casting. A pressure reducing valve actuator is integrated into the sleeve. This moved here device can be used in a variety of applications including abrasive or corrosive fluids, as well as media containing a high solids content. These pinch valves offer high performance and excellent service life. They are also ideal for proportional control applications.
The sleeve is the most important part of a pinch valve. A well-designed rubber sleeve will provide excellent wear and corrosion resistance. It will also provide good bearing pressure. Depending on the type of media, different types of sleeve materials may be used. For example, EPDM rubber pinch valves are designed for higher temperatures. However, the polymer content of EPDM rubber pinch valves must be controlled to ensure long-term functionality. The sleeve is driven by a pneumatic, hydraulic, or electric actuator.
Inner bushings
The inner bushings of a rubber pinch valve are made from a variety of materials. Standard materials include natural rubber and EPDM. Other materials include butyl, silicone resin, and nitrile. These materials are able to withstand high temperature and high pressure without sacrificing food safety.
These valves are used in wastewater treatment plants, power plants, mining, and various other processes that involve liquids or slurries. Their high wear and corrosion resistance make them ideal for these types of applications. They also can be used in sanitary applications.
Service life
The service life of a rubber pinch valve is defined as the number of cycles in which the valve must be replaced. In general, the service life of a pinch valve is approximately 5 million cycles. Some types have a lower service life than others, but both need to be replaced from time to time. If you need to replace a pinch valve frequently, you can opt for an internal type, which requires only minimal effort and no special tools.
The rubber sleeve of a rubber pinch valve plays an important role in determining the service life. The material used for the sleeve is corrosion-resistant and can withstand high temperatures. In addition, it has good bearing pressure. Several types of sleeve materials can be used, depending on the flow media. The EPDM version is used in higher temperatures. However, the polymer content must be kept within limits.