Pinch Valves

PIC® series


The pinch valve is an economic solution which is simple to install and requires very little maintenance. It controls the flow of fluids (liquid, gas or powder) and provides a totally leakproof seal when it is closed.
Milton Roy Europe, with more than 50 years' experience of pinch valves, has a complete range of full-bore valves suitable for many different applications.
This range is available in cast iron, aluminium and PVC versions.
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.

 

Applications

 With their technical characteristics and the variety of sleeves available, our pinch valves are suitable for many applications:

  • 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.
  • Edible liquids: beer, wine, cocoa butter, edible oils, beet juice, milk, sugar, syrups, etc.
  • Powdered products: cement, flour, sand, talc
  • Other fluids: reagents for water treatment, organic solvents, fertilisers, etc.

 

Advantages

  • 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 (bolted flange or threaded socket connection, depending on model)
  • Energy-efficient: low compressed air consumption
  • Minimal (no mechanical wear), quick and easy maintenance: the sleeves are the only wear parts
  • Cast iron/aluminium pinch valves:
    • Total closure even in the presence of solid particles, gas, powders and slurries, etc.
    • Risk of leak into the environment very low, as there are no glands
    • Protection of the installation: no water hammer on closing and opening
  • PVC pinch valves:
    • Chemical resistance: suitable for corrosive atmospheres
    • Light weight: low installation costs (no support)
    • Totally leakproof with gases and powders as well as liquids, and even slurries

TECHNICAL CHARACTERISTICS

Cast iron/aluminium pinch valves

  • 11 sizes available, from DN 20 to DN 300
  • Material: cast iron (DN 20 to DN 80) or aluminium (DN 100 to DN 300) body
  • Three sleeve grades available as standard (other materials on request)
  • Operating pressure: 4 bar (DN 20 to DN 200) / 3 bar (DN 250 and 300)
  • Control pressure: 2 to 6 bar (DN 20 to DN 200) / 1.5 to 4.5 bar (DN 250 and 300)
  • Minimum differential pressure: 2 bar (DN 20 to DN 200) / 1.5 bar (DN 250 and 300)
  • Connections: 316L stainless steel threaded sockets (DN 20)/Cast iron (DN 40 to DN 300) or 316L stainless steel (DN 40 to DN 200) flanges
  • Temperature range: -5°C to +80°C

PVC pinch valves

  • 4 sizes available, from DN 20 to DN 40
  • Material: PVC body, sockets and nuts
  • Three sleeve grades available as standard (other materials on request)
  • Operating pressure: 4 bar maximum
  • Control pressure: 6 bar maximum
  • Minimum differential pressure: approximately 2 bar, depending on sleeve grade
  • Connections: threaded gas sockets
  • Temperature range: -5°C to +60°C


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