The rubber pinch valve is an essential component of pneumatic and hydraulic systems. It is used to control valve opening and closing under normal operating pressures. There are many advantages of this type of valve, including good low temperature properties and application versatility. You can use it in a variety of applications and can install it directly into the fluid line or attach it to a tee for easy installation. In addition, a pinch valve can be used for rotational and linear motion control. It also eliminates the need for periodic shutdowns to empty the receiver.
Material selection
When choosing a pinch valve, material selection is critical. A valve’s sleeve should be durable and lightweight. It should also have the necessary abrasion resistance. There are several types of sleeve materials available, including natural rubber, polyurethane, silicone, and EPDM (ethylene propylene diethyl monomer). The sleeve material should also be resistant to corrosion.
The material used to manufacture a pinch valve depends on the pressure and flow characteristics of the media it will handle. The sleeve material must be durable enough to withstand the operating pressure, or it may not close at all. In addition, the material should be suitable for the temperature of the application.
Application
A rubber pinch valve is a valve that has been designed to isolate a flowing media. This rubber pinch valve prevents damage and contamination of other parts. The elastic rebounding property of the rubber sleeve absorbs the impact of the flowing media. In addition, the material is less likely to wear than metal surfaces, so it can last a long time.
Pinch valves are best used in processes where the pressure differential is low. High pressure differentials can cause pinch valves to collapse and deform, so you need to be careful when selecting a pinch valve. Furthermore, they are not ideal for applications where vacuum is present.
Service life
The service life of a rubber pinch valve is determined by a variety of factors, including the type of valve, the actuating method, and the pressure class. A pinch valve should also have adequate flanges to accommodate the flow and pressure required. The service life is increased by ensuring that the valve’s sleeve is made of high-quality materials.
The sleeve of a rubber pinch valve is one of the most important components. The sleeve should be able to withstand corrosion, wear, and abrasion. It should also be able to withstand temperature extremes and exert high bearing pressure. A number of different sleeve materials are available depending on the media flowed through the valve. EPDM rubber pinch valves, for example, are made for higher temperatures, while a POM sleeve is used for low-temperature environments.
Operation
Pinch valves are used to control the flow of fluids and abrasive solids. Their body is made of a molded rubber or synthetic material that contains the pinching mechanism. All other operating parts are external to the valve and do not come into contact with the flow media. These valves are usually used in processes where contamination is a concern. They are also widely used in laboratory equipment such as clinical analyzers and medical instruments.
The pinch valve works by closing and opening the passage. The spring element in the valve acts to close the valve when the negative pressure in the system exceeds the spring force. When the pressure is positive, the rubber sleeve opens and closes the passage.
