Selecting Rubber Pinch Valve Materials

When selecting pinch valves, it is essential to know the material they are made of. A pinch valve’s inner liner is usually composed of an all-quality elastomer, and it is typically made of a standard wear-resistant natural rubber. This material is suitable for handling a range of bulk materials and has high temperature resistance. It is also food-safe, which makes it an excellent choice for the manufacturing of valves for processing food products. Other materials used to construct pinch valves include silicone resin, silicone polymer, and fluoro rubber.

Material selection for pinch valve sleeves

Pinch valve sleeves come in a variety of materials for various applications. They can be made from multiple layers or be fiber reinforced. The material used should be suitable for the application temperature and pressure range. The most common material is rubber, which is resistant to corrosive slurries. Other materials include polyurethane, which offers high abrasion resistance.

A pinch valve’s body should be made of a lightweight material to reduce the valve’s weight. Moreover, the material used for the sleeve doesn’t have to be compatible with the media, but should be abrasion resistant. If a sleeve is damaged or torn, the fluid inside can become clogged, which will increase pressure drop, turbulence, and abrasion of the liner wall.

Operating pressure

Operating pressure is the amount of pressure needed to close a pinch valve. Typically, the control pressure is 0 bar. A pinch valve that closes too rapidly may not be effective. The material used for the valve must withstand the expected temperature and operating pressure. Pinch valves are generally very durable and have a low sleeve wear rate.

A pinch valve is an elastomeric rubber sleeve that is opened and closed. When closed, a pinch valve traps particles around the rubber sleeve. When fully opened, it allows unrestricted flow and prevents clogging.

Control pressure

Control pressure is an important aspect of pinch valves. The pressure differential required to close the valve must be greater than the operating pressure. Otherwise, the valve may not close. The material of the sleeve is also important. It should be able to withstand the temperatures of the application. The streamlined flow pattern of pinch valves reduces sleeve wear.

A pinch valve consists of three major parts: a housing, an internal rubber sleeve, and end connectors. These parts are the only parts that come into contact with the flow media. The other components, which are primarily used for support and connection to the valve, are located at the other ends of the valve. When not in use, the valve is in an open state. When it is pressurized, the rubber sleeve is compressed. When it is fully compressed, the flow is obstructed.


In many industrial applications, a pinch valve can be a valuable tool. They are used in processes that include entrained solids, such as slurries. The rubber sleeve of a pinch valve closes droptight around the solids in the flow, preventing entrapment. This makes pinch valves safer than other valve types. They also provide a 100 percent tight shutoff.

The basic design of a pinch valve is very simple: it consists of a molded sleeve made of rubber or synthetic material. The rubber sleeve pinches closed when the pressure increases and the material builds up. When the valve closes, the sleeve stretches, and the material that builds up will flake off. As the sleeve stretches, the velocity of the fluid increases. The higher the velocity of the flow, the more flaked material is blasted.


Rubber pinch valves are a relatively low-maintenance type of valve. These valves are designed to resist abrasion and corrosion and only need maintenance after a long period of use. They are available as mechanical and air-operated valves, and their robustness is ideal for pumping bulk materials and hard-to-regulate liquids. The sleeve is typically made from rubber or other elastomeric material, and requires little maintenance.

In addition to replacing the rubber sleeve, air-operated pinch valves may also require an occasional replacement of the rubber sleeve. This maintenance procedure takes a minimum of time and requires no special tools. It is also relatively inexpensive to perform, resulting in a low total cost of ownership.