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Pinch Valve

LIANKE specializes in industrial pinch valves engineered for demanding chemical and abrasive applications. Our product range includes manual, pneumatic, electric, and air-operated pinch valves, featuring EPDM sleeves (-40°C to +110°C) for concentrated chemicals, natural rubber (-40°C to +80°C) for wear resistance, and NBR (-30°C to +100°C) for oil applications. These industrial-grade valves excel in chemical processing, welding operations, and abrasive material handling, offering full bore design, self-cleaning operation, and minimal maintenance requirements.

Pinch Valve Sleeve

Our pinch valve sleeve materials currently include Linke’s patented 38-series Nadiflex composite rubber, Q-grade NR natural rubber jointly sourced from Lanxess and Mitsui, EPDM ethylene propylene rubber, SI6501 high molecular silicone rubber, and NBR nitrile rubber. Additionally, we offer specialized pinch valve sleeve materials such as Hypalon rubber, CR-grade chloroprene rubber, and B-grade IIR butyl […]

Manual plastic pinch valve

A manual plastic pinch valve is a type of valve that uses a manual mechanism to pinch and close a flexible plastic sleeve or tube, effectively controlling the flow of various media. Main property of the sleeve Rubber quality Application examples Temperature range Typical media EPDM Chemical applications: Applicable to 75% of all industrial chemical […]

Aluminum Alloy Manual pinch valve

Our pinch valve is ideal for media containing sediments, crystals, or abrasive materials. Common applications include wastewater treatment (sludge, grit, lime), power plants (FGD, ash removal), mining (tailings, slurries), chemical processes, and various industries. This pinch valve features unobstructed flow, full bore design, zero leakage even with particles present, and low maintenance. While temperature limited […]

Pneumatic pinch valve

Solution for controlling the flow of corrosive, abrasive, and granular media in a variety of industrial applications. Designed to shut off or regulate flow with precision, utilizing pressurized air for effortless operation. Main property of the sleeve Rubber quality Application examples Temperature range Typical media EPDM Chemical applications: Applicable to 75% of all industrial chemical […]

Welding pneumatic pinch valve

Welding pneumatic pinch valves are 2/2-way valves that utilize pressurized air to open or close the valve, effectively managing the flow of corrosive, abrasive, or granular media, such as soldering agents. These valves are integral to creating the protective atmosphere required for submerged welding, ensuring that the welding process is efficient and effective Main of […]

Electric pinch valve GJ941X-II

Electric pinch valve uses an electric actuator to control the opening and closing of a flexible elastomer sleeve or tube with configurable actuation which can be configured with most multi-turn electric actuators on the market, providing flexibility in control options. Main of components Body, sleeve, Stem, pinch rod, side guide rod, Hand wheel etc. Working […]

FAQ

What is the basic operating principle of a pinch valve?

Pinch valves regulate fluid flow by squeezing a flexible sleeve along the centre line. When open, they provide a full, unrestricted bore.

What are the main components of a pinch valve?

The valve comprises three key parts: the body, an internal rubber sleeve, and end connections. The sleeve, which closes the valve when compressed, is wear-resistant, absorbing impact energy and returning to shape.

What are the advantages of pinch valves over traditional valve types?

Benefits include low maintenance, a compact design, quick operation, self-cleaning, tight shutoff, and minimal turbulence. Only the rubber sleeve needs periodic replacement.
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What is the typical operating temperature and pressure range for pinch valves?

Standard models operate up to 250°F, with special versions for temperatures from -100°F to 550°F. Pressure ratings depend on valve size, ranging from 100 psig for 1-inch valves to 15 psig for 12-inch ones, with special models reaching 300 psig.

What industries commonly use pinch valves?

Pinch valves are commonly used in wastewater treatment, cement, mining, food and beverage, medical, and pharmaceutical industries, particularly for handling slurries, powders, and abrasive materials.

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

Pinch valves use flexible sleeves for full-bore closure, while diaphragm valves use a flexible membrane against a weir. Pinch valves handle more abrasive media and offer better self-cleaning.

How long does a pinch valve sleeve last?

Typically 1-3 years depending on application, media type, cycling frequency, and operating conditions. Abrasive materials reduce lifespan while clean media extends it.

Can pinch valves handle vacuum?

Yes, with proper reinforced sleeves and body design. Standard pinch valves handle up to -0.5 bar vacuum, while specialized designs can manage full vacuum.

What is the maximum pressure rating for pinch valves?

Standard pinch valves operate up to 10 bar pressure. Size affects rating - smaller valves handle higher pressures (up to 20 bar) while larger ones typically max at 6 bar.

Are pinch valves suitable for food applications?

Yes, with FDA-approved sleeve materials like white natural rubber or food-grade EPDM, pinch valves are widely used in food, beverage, and dairy processing.

Pinch Valve

Air Operated Pinch Valve

Electric Pinch Valve

Manual Pinch Valve

Pneumatic Pinch Valve

Rubber Sleeve for Pipe