Your Trusted
Pinch Valve
Supplier
Premium pinch valves, replacement rubber sleeves, and complete accessories — engineered to eliminate clogging, resist abrasion, and withstand corrosive media. Factory-direct since 1982.
Pinch Valves for Every Application
From manual hand-wheel operation to fully automated pneumatic and electric actuation — engineered for the most demanding flow control challenges.
Manual Pinch Valve
Hand-wheel operated with lockable design. Ideal for on/off control in mining and water treatment applications.
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Air Operated Pinch Valve
Pneumatic actuation for fast, remote-controlled flow regulation. Perfect for automated process lines.
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Electric Pinch Valve
Precision electric actuators for proportional flow control. Ideal for dosing and batch process applications.
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Pneumatic Pinch Valve
Fast-cycling pneumatic control for high-frequency open/close applications across industrial systems.
ExploreComplete Accessories from a Single Source
Beyond complete valve assemblies, LIANKE supplies every component you need to maintain, upgrade, or customize your pinch valve system. All accessories are manufactured to OEM specifications and ship worldwide.
Your Reliable Pinch Valve Partner
40+ Years Heritage
Founded as Wenzhou Yongzhong Chemical Machinery Plant in 1982. Four decades of valve engineering excellence.
Globally Certified
API, CE, ISO 9001, ISO 14001, ISO 45001, EAC. Every product meets international quality standards.
7+ Sleeve Materials
NR, EPDM, NBR, CR, Silicone, Hypalon, Butyl — the widest range of rubber sleeve options for any application.
Full Supply Chain
From raw rubber compounding to finished assembly — everything under one roof for speed and consistency.
Global Logistics
Serving 50+ countries with established shipping routes. FOB Wenzhou or CIF to your port.
The Complete Guide to Pinch Valve Sleeve Materials
The rubber sleeve is the heart of every pinch valve — the only component that contacts your process media. Choosing the right material directly determines valve lifespan, chemical compatibility, pressure handling, and total cost of ownership. LIANKE offers the widest range of sleeve materials in the industry with in-house rubber compounding capability.
| Material | Temp. Range | Key Strength | Best Application | Chemical Resistance |
|---|---|---|---|---|
| NRNatural Rubber | -40°C to +80°C | Exceptional abrasion resistance, high elasticity | Mining slurry, sand, gravel | Weak acids & alkalis |
| EPDMEthylene Propylene | -50°C to +150°C | Outstanding weather & ozone resistance | Water treatment, steam | Strong acids, alkalis, ketones |
| NBRNitrile Rubber | -30°C to +100°C | Excellent oil & fuel resistance | Petroleum, hydraulic fluids | Hydrocarbons, oils, fats |
| CRChloroprene | -35°C to +120°C | Flame retardant, moderate oil resistance | Chemical plants | Moderate chemicals & oils |
| SiliconeVMQ — SI6501 | -60°C to +230°C | Widest temp range, FDA compliant | Food, pharma, extremes | Weak acids, limited chemicals |
| HypalonCSM | -30°C to +130°C | Superior chemical & UV resistance | Aggressive chemicals | Strong acids, oxidizers |
| IIRButyl Rubber | -45°C to +120°C | Excellent gas impermeability | Gas pipelines, vacuum | Dilute acids, alkalis, gases |
Natural Rubber (NR)
Q-Grade NR — The Industry WorkhorseNatural rubber remains the most widely used pinch valve sleeve material worldwide. Its exceptional elasticity allows the sleeve to flex thousands of cycles without developing fatigue cracks. NR offers outstanding abrasion resistance — critical when handling mining slurries, sand-laden water, or gravel transport lines.
LIANKE's Q-grade natural rubber is sourced through a strategic partnership with Lanxess and Mitsui, ensuring consistent compound quality. Our NR sleeves achieve 50–60 Shore A hardness, providing the ideal balance between flexibility and structural integrity.
Limitations: Not suitable for petroleum-based fluids, strong oxidizing acids, or prolonged UV exposure.
EPDM Rubber
Ethylene Propylene Diene Monomer — Weather ChampionEPDM excels where temperature extremes, weather exposure, and chemical aggression converge. Its saturated polymer backbone gives outstanding resistance to ozone, UV radiation, and aging — making it the sleeve of choice for outdoor installations and water treatment facilities.
Temperature tolerance ranges from -50°C to +150°C, making it one of the most thermally versatile options. LIANKE's EPDM sleeves are formulated with premium-grade compounds to maximize flex life and minimize compression set.
Limitations: Poor resistance to petroleum oils, mineral oils, and hydrocarbon solvents.
NBR (Nitrile Rubber)
The Oil & Fuel SpecialistWhen your process involves petroleum products, hydraulic fluids, or vegetable oils, NBR is the clear choice. Nitrile rubber's acrylonitrile content provides excellent resistance to hydrocarbon-based media, making it indispensable in oil refining and fuel distribution.
LIANKE offers NBR sleeves with varying acrylonitrile content (33–40%) to fine-tune the balance between oil resistance and low-temperature flexibility.
Limitations: Poor resistance to ketones, esters, and chlorinated hydrocarbons.
Silicone Rubber (VMQ)
SI6501 Grade — Extreme Temperature & Food-SafeSilicone stands apart with its extraordinary temperature range: -60°C to +230°C. LIANKE's SI6501 grade is a high-molecular-weight formulation that meets FDA and EU food-contact regulations — non-toxic, odorless, and taste-neutral.
In food processing and pharmaceutical applications, these properties are critical. The material will not contaminate sensitive products, making it ideal for dairy, beverage, and pharmaceutical transfer systems.
Limitations: Lower abrasion resistance than NR. Not suitable for steam or strong acids/bases.
Material Selection Quick Guide
Answer these questions to find your ideal sleeve material
Engineered for the World's Toughest Industries
LIANKE pinch valves serve critical applications across diverse sectors worldwide.
Mining & Minerals
Slurry transport, tailings management, concentrate handling
Chemical Processing
Acid, alkali, and solvent control in demanding environments
Water Treatment
Municipal plants, desalination pre-treatment systems
Food & Beverage
Dairy, brewing, sugar processing with FDA compliance
Oil & Gas
Fuel transfer, produced water, drilling mud handling
Pharmaceutical
Sterile transfer, batch processing, clean-room systems
Cement & Construction
Cement slurry, aggregate and concrete handling
Power Generation
Ash slurry handling, FGD systems, cooling circuits