Pinch Valves

Working principle

The automatic elastic deformation type pinch valve comprises a valve body and a cylindrical sleeve reinforced with natural or synthetic rubber. It is normally open. The valve is closed by the application of pressure between the valve body and the sleeve. This pressure is created by a fluid, usually compressed air (but this can be replaced by pressurised water). The action of this fluid crushes the sleeve in a particular direction, which is determined by careful positioning of the fibre reinforcement, thus totally closing the valve.

Pinch valve benefits

• Full-bore: No abnormal friction losses, no risk of blockage
• Long sleeve service life: Sleeves strengthened with fibre reinforcement enabling use in extreme conditions
• Easy to install
• Energy-efficient: Low compressed air consumption
• Minimal (no mechanical wear), quick and easy maintenance: The sleeves are the only wear parts

Thanks to their specific characteristics and the variety of sleeves available, Milton Roy pinch valves are suitable for various sectors and many applications: liquids, suspensions, granulates, pastes, etc.

• Acids: Hydrochloric, nitric, sulphuric, hydrofluoric, etc.
• Alkalis: Sodium hydroxide, ammonia, potassium, phosphates, sodium bicarbonate, etc.
• Viscous or abrasive liquids: Seawater, wastewater, limewash, paper pulp, paint, sludge, soot, clay slip, etc.
• Powdered products: Cement, flour, sand, talc
• Edible liquids: Beer, wine, cocoa butter, edible oils, beet juice, milk, sugar, syrups, etc.
• Other fluids: Reagents for water treatment, organic solvents, fertilisers, etc.

They are widely installed in water treatment plants, cement plants, silos, wineries, and even on the trains.