A pinch valve is a type of control valve that uses a pinching effect to restrict fluid flow. These valves are typically full bore and fully ported. They can be used in pneumatic conveying systems and have many applications. However, they can be costly. To learn more about pinch valves and their applications, read on!
Limitations of pinch valves
While pinch valves have many benefits, they are also susceptible to wear. They have a limited operating pressure and temperature range. They can only tolerate up to 200°F and 300 psi, respectively. The closing force required to open a pinch valve also depends on the working fluid’s pressure.
Pinch valves are typically made of silicone or flexible PVC tubing. They are inexpensive, but tend to wear out easily and require frequent replacement. However, elastomeric tubing is generally better for a long-term use, although it requires more upfront costs.
Common types of pinch valves
Pinch valves are valves that control and isolate flow of a liquid or gas. They are used in various applications, such as waste water treatment and pharmaceutical manufacturing. They are also used for a variety of laboratory equipment and medical devices. These valves are typically made of rubber. EPDM, NBR, silicone, and food-grade rubber are the most common materials used for the body of the valve.
Pinch valves come in many different designs. Their internal volume is determined by the inner diameter of the tubing they are connected to, as well as the https://evrproducts.com/products/pinch-valves/ length of the tubing. The ID of the tubing is chosen according to the required flow capacity in the particular application. For example, most medical applications choose tubing IDs of 1.5 mm or less, which equates to a flow capacity of about 50 mL per minute. While choosing the appropriate pinch valve for a particular application, keep in mind that the internal volume is more important than the flow capacity. This is because the internal volume of the valve must be within the prescribed pressure drop.
Application of pinch valves in pneumatic conveying systems
Pinch valves have two main components: a sleeve and a body. The sleeve is made of flexible polymer or rubber and should resist wear due to abrasive media. The valve’s design allows for a low pressure differential across the valve and allows media to pass through without being impeded. Pinch valves can be operated mechanically or pneumatically.
Pinch valves are widely used in pneumatic conveying systems and have a wide range of applications. They are often used in batching systems, weighing systems, vacuum toilets, and compressed air control systems. They can completely shut off fluid flow if necessary, making them ideal for a wide range of processes.
Cost of pinch valves
Pinch valves are an important part of a process plant’s flow system and can help isolate abrasive products. They are also useful in regulating the flow of fibrous materials, like carbon and textile fibers. They also have a high rebound elasticity, so they can close and open with ease. However, the type of pinch valves you choose will depend on the media you are handling.
Pressure-assisted pinch valves use outside fluid pressure to close the valve, so there is no need to use a manual operator. These valves work similarly to other types of valves and have tapered connections to connect to the outside of the casing. This fluid pressure overcomes the internal pressure of the media. It then stays closed until the pressure of the system increases. When pressure increases, introduced pressure decreases, which allows the valve to open again. This type of valve is typically used in on/off applications.