Malema M-VF Safety Excess Flow Valve

Safety excess flow valve for corrosive and non-corrosive fluids.

Starting at $590.00

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  • Usually ships in 4 weeks
Product Specs

Features

  • High reliability
  • Field adjustable
  • Low pressure drop
  • All mechanical
  • Right angle flow
  • Set point accuracy: ±10% maximum
  • Repeatability: 3%
  • Flow range:
    • Air: 100 to 900,000 sccm
    • Water 5 to 25,000 ml/min
  • Set point range for air is referenced at 14.7 psia and 70° F
  • Set point range for water is referenced at 70° F

The Malema M-VF safety excess flow valve is engineered for fast automatic shut-off in case of line, hose, or fitting failures, protecting employees, plant and valuable instruments. The M-VF comes in five port sizes, 1/8", 1/4", 3/8", 1/2", and 3/4" sizes, and the option to chose a KFM or FFKM O-rings for chemical compatibility. Designed for protection of systems handling corrosive, toxic, radioactive and flammable materials; the valve instantly detect a surge in the system and stop fluid flow. When the line break is repaired and pressure is equalized in the system, the valve will open to allow the fluid to flow through the system. The M-VF operates effectively with all fluids, liquids, and gases. 

As the fluid (liquid or gas) enters the valve, the Pressure differential across the piston creates a venturi effect, accelerating the flow through the valve. At a preset flow rate, when the differential exceeds the magnetic attraction between the piston magnet and the adjusting screw magnet, the piston travels instantaneously over towards the output port, thereby shutting off the flow. When the pressure is equalized between both sides of the valve, the piston automatically returns to its previous adjusted flow setpoint. The shut off point is field adjustable and this is achieved by turning the adjusting screw.

Applications

  • Pollution control
  • Leak detection
  • Hydraulic lines
  • Regular protection
  • Compressed air and gas system
  • Gas analyzers
  • Sampling station operator protection
  • Catastrophic failure protection