Natural Rubber Pinch Valve

Body: Aluminum alloy Cast Iron, Stainless Steel
Pressure: PN6 PN10
Size: 1/2″ -12″ (15mm – 300mm)
The sealing ring :rubber inner liner

    Category: Pinch valve


    Natural Rubber Pinch Valve: Working, Components, and Applications

    A natural rubber pinch valve, also known as a squeeze valve, is a reliable and cost-effective alternative to traditional valve solutions. It offers excellent wear resistance, corrosion resistance, and fatigue resistance, making it ideal for handling abrasive and corrosive materials. In this article, we will discuss how a natural rubber pinch valve works, its components, and applications.

    How a Natural Rubber Pinch Valve Works

    Pinch valves operates by applying pneumatic or hydraulic pressure to pinch and close a flexible tube (also known as a sleeve) made of natural rubber or other elastomeric material. When pressure is applied, the rubber sleeve collapses, effectively blocking the flow of material through the valve. When pressure is released, the sleeve returns to its original position, allowing for the flow to resume.

    Components of a Natural Rubber Pinch Valve

    The main components of a sleeves for air pinch valve include:

    1. Body: The valve body houses the pinch mechanism and the rubber sleeve. It is typically made of aluminum alloy, cast iron, or stainless steel for enhanced durability and longevity.
    1. Rubber Sleeve: The rubber sleeve serves as the sealing element and is made from wear-resistant natural rubber, food-grade high-temperature resistant rubber, ethylene-propylene rubber, or other suitable elastomeric materials.
    1. Actuator: The actuator applies pressure to the sleeve for pinch operation. It can be either pneumatic or hydraulic, depending on the specific application.
    1. Flanges: Flanges are used to connect the pinch valve to the piping system. They are compatible with various standards, including EN 1092, ASME Class 150, AS 4087, and JIS 5K/10K.

    Applications of Natural Rubber Pinch Valves

    Pneumatic pinch valve are widely used for controlling the flow of abrasive, corrosive, and particulate-laden materials in various industries, such as:

    • Cement and concrete manufacturing
    • Silo and bulk material handling
    • Mining and mineral processing
    • Food and beverage processing
    • Chemical and pharmaceutical processing



    1. Excellent wear and corrosion resistance, making them suitable for abrasive and aggressive applications.
    2. Smooth flow path minimizes clogging and reduces maintenance requirements.
    3. Bi-directional, allowing for flow control in both directions.
    4. Simple design with fewer moving parts, reducing the likelihood of mechanical failure.

    Comparison to Other Types of Valves

    There are several types of valves available in the market, such as butterfly valves, ball valves, and diaphragm valves. However, natural rubber pinch valves offer unique advantages, particularly for handling abrasive and particulate-laden materials.

    Key differences between natural rubber pinch valves and other types of valves include:

    1. Natural rubber pinch valves provide better wear and corrosion resistance, whereas other valve types may require special coatings or lining to handle abrasive materials.
    2. Pinch valves have no moving parts in contact with the process fluid, reducing the chance of mechanical failure, while other valves may wear

    Body: Aluminum alloy Cast Iron, Stainless Steel
    Pressure: PN6 PN10
    Size: 1/2″ -12″ (15mm – 300mm)
    Flange accommodation: 
    EN 1092 PN 6/PN10/PN16
    ASME Class 150
    AS 4087 PN 10/ PN 16
    JIS 5K/10K
    Body style: flange
    The sealing ring :
    wear-resistant natural rubber
    natural rubber
    food industry of high temperature resistant natural rubber
    ethylene-propylene rubber
    Ding Qing Nitrile three EPDM, /VITON/FPM Silicone
    fluorine rubber chloroprene rubber /Neoprene
    chlorosulfonated polyethylene rubber Hypalon/CSM butyl acrylate /Butyl and other materials such as other material needs please tips.
    Applications: cement, silo, sand, mineral materials, limestone, clay, marl, sand, slurry

    pinch valve is mainly the channel smooth, wear resistance, corrosion resistance and fatigue resistance, no pressure loss, no blockage, no leakage, water hammer shock, has good physical and chemical properties. Lining sleeve for ease of replacement, low maintenance cost.

    Valves with Actuator
    with both pneumatic and electric actuator
    with gear operator for actuator
    Limit switch box or solenoid valves are available
    for high working temperature condition, pov valve will help to build suitable bracket and coupler

    pinch valve


    What is a pinch valve?

    A pinch valve is a type of control valve that uses a pinching effect to control processes such as air and fluid flow. It works by using two rubber sleeves, known as the elastomeric seals or diaphragms, which are connected by an actuator. When the actuator is triggered, it causes the elastomeric seals to pinch together tightly and restrict or stop material flow through the pipeline. Due to its simplicity and low cost of ownership, the pinch valve is frequently used in water supply systems for regulating pressure and controlling both process fluids and hazardous materials.

    The versatility of this type of valve also makes it great for various applications including industrial wastewater treatment facilities, food processing plants, chemical operations (where corrosive liquids are present), pipe lines containing abrasive materials, pharmaceutical companies handling toxic chemicals, cryogenic pipelines (containing substances that must remain extremely cold), power plants generating steam at high temperatures; etc..

    Pinch valves have many advantages compared to other types of valves such as gate valves or ball valves – they require little maintenance because there are no moving parts; easy installation; minimal operational costs due to lack of friction from any internal parts; they provide good protection from leaks due to their leak-proof design; no risk posed by clogging thanks to its open-end design which allows suspended particles like mud or sand pass without blocking it up. In addition, this type of control valve can operate with high pressure right out-of-the box without requiring any additional modifications during use – making them perfect for quick changes in process conditions where immediate responses may be necessary.

    What is a pinch valve used for?

    A pinch valve is a device used to control the flow of fluids in a piping system. Pinch valves are designed with a flexible sleeve, typically made from an elastomeric or thermoplastic material, that can be opened and closed by mechanically squeezing or pinching the sleeve between two bars in order to block the fluid. This makes them ideal for controlling flows within thicker or more difficult-to-control media like slurries and solids.

    Pinch valves have numerous applications in industrial processes across many industries such as Oil & Gas, Chemical Processing, Mining Operations, Food Processing Plants and Wastewater Treatment Facilities. They are most commonly used for on/off shut offs when fine regulation isn’t necessary; air flow control; water turbine bypass systems; solids transfer vessels; handling corrosive media and slurriess involving abrasive particles; safety shutoffs during process upsets (like clogging); pilot plant testing programs; large scale production vessels where pumps aren’t feasible due to size constraints.

    Due to their ability to handle thick materials without corrosion or wear on internal components, pinch valves often offer significant advantages over traditional types of valves such as ball valves – better pressure equality over long periods of time along with lower friction levels when closing/opening sleeves results in more efficient operation with fewer breakdowns and longer life cycles resulting in cost savings over time. Furthermore they require very little space while allowing flexibility for different shapes which allows for easier integration into existing systems adding additional value depending on installation requirements.

    What is the difference between a pinch valve and a solenoid valve?

    The difference between a pinch valve and a solenoid valve is often misunderstood. To answer this question, we must first understand the basics of how each type of valve works.

    A pinch valve, also known as an internal plug or squeeze valves, consists of an expandable rubber body which opens and shuts off fluid flow by deforming along its length when pressure on the outside is applied. The main benefit to using pinch valves instead of other types is that they can control all kinds of media regardless of properties such as viscosity and abrasiveness. As well, they have virtually no moving parts so there are no seats or seals to wear out over time and regular maintenance requirements are minimal.

    Solenoid valves, on the other hand, use electromagnetic coils to open and close ports in order to shut-off or direct flow from one pipe/passageway to another. This method allows for very precise control over flow rates; however it does require more energy than other methods due to its utilization of electricity for operation (unless utilizing manual override models). Additionally, while solenoid valves are highly reliable in many applications due to their relatively simple design principle – concerns may arise regarding contamination entering through tiny crevices leaking past the traditionally used elastomeric sealings after time has passed – thus leading potential buyers towards materials such as PTFE-coated seating surfaces if long-term reliability is desired with little maintenance required down the line.

    To summarize: Pinch Valves offer superior media control capabilities without relying on energy sources; however they lack precise port size regulation necessary in certain industries compared to Solenoid Valves which do require power for operation but provide better port size regulation with more reliable sealing characteristics thanks largely in part due material advancements made throughout recent years – giving users greater confidence in long-term performance even under harsh conditions potentially encountered during everyday operations.

    What are the advantages of a pinch valve?

    Pinch valves are a type of valve used in industries to control the flow of liquids and gases. These valves are normally designed with a variable orifice, which allows the user to change the size of the opening and shut off liquid or gas flows quickly and easily. The advantages of pinch valves include enhanced durability, reduced maintenance requirements, noise reduction, improved safety measures, greater accuracy in controlling media flows, increased flexibility for automated processes using multiple applications.

    From a durability perspective, pinch valves have elastomer sleeves that provide superior wear resistance compared to other types of industrial valves on the market today. This reduces downtime due to maintenance costs as well as ensures reliable performance over time. Noise levels can be substantially reduced when compared with metal-to-metal butterfly or gate valves because they do not contain any moving parts that vibrate against each other.

    In terms of safety features, pinch valves typically employ an emergency hand override system which allows complete closure even when power is not available or if there is a system malfunction. This means less risk if there is an operational failure due to unexpected forces like pressure surges within pipes carrying hazardous materials such as chemicals and other potentially dangerous substances. Furthermore, their design enables better accuracy in controlling media flows since they offer adjustable tightness settings which allow users to fine tune liquid volumes more precisely than with conventional mechanisms like diaphragm seals and ball checks; again reducing operator error along with improving environmental health & safety regulations compliance (as long as approved components are employed).