Choosing a Pinch Valve

A pinch valve is a type of control valve that utilizes the pinching effect to stop a fluid’s flow. It can be fully ported or full bore. A pinch valve is a very popular type of valve and is used in a wide range of applications. You can learn more about this type of valve by reading this article.

Non-wetted pinch valves

Non-wetted pinch valves use a highly elastic polymeric disc as a diaphragm, which can lift and move to meet the bottom of the valve body. The diaphragm limits the flow rate of the valve by limiting the fluid temperature and pressure. When the valve is fully opened, the diaphragm is separated from the wetted portion, allowing the liquid to flow underneath it.

Non-wetted pinch valves are used for a wide range of processes. Their open-frame design is lightweight and inexpensive, and protects the operating mechanism from contaminants. In addition, their heavy-duty pinch mechanism means that they won’t corrode, and the valve’s seat isn’t susceptible to wear and tear. They are also excellent for handling corrosive, abrasive, and fibrous liquids.

Internal vs external tubing

When choosing a pinch valve, the material of the flow path is crucial. An external pinch valve has a single wetted material, while an internal valve has multiple wetted materials. While external pinch valves are typically more flexible, internal pinch valves are more difficult to adjust.

TheĀ internal volume of a pinch valve is determined by the inner diameter (ID) and the length (length). For most scientific and medical applications, an ID of 1.5mm or smaller is appropriate. Additionally, the valve must have enough internal volume to meet pressure drop requirements.

Effective throttling range

The effective throttling range of a pinch valve is a key factor to consider when choosing one. The throttling range of pinch valves can be anywhere from ten percent to ninety five percent. These valves are used in a variety of applications including liquids, solids, slurries, and more.

The effective throttling range of a pinch valve can be calculated with the help of mathematical tools. One of these tools is based on a theory of cavitation, which is a kind of erosion of the sleeve. In principle, cavitation is caused by a high pressure drop across the valve, but it can also be the result of a single small cavitation.


A pinch valve is a type of valve used in a wide variety of applications. Its name relates to its sleeve, which is a small rubber tube or liner that is squeezed by a pneumatic actuator. They can be used in a variety of industries, including mining, electric power, and chemicals.

The cost of a pinch valve depends on the type and number of components. They can be electric or air operated. The former has a more robust design and requires only a small amount of compressed air to operate. Pinch valves are often used in applications that require a controlled flow of abrasive, corrosive, or fibrous products. There are two main types of pinch valves: air-operated and electric-operated. Electric-operated pinch valves use a different actuator and power, while air-operated pinch valves are commonly used in sanitary food.

Leave a Reply

Your email address will not be published. Required fields are marked *