Malema Markets

Wherever safe, accurate, and repeatable flow control and measurement are required, you can find Malema solutions.

For over 40 years, Malema flow meters, flow controllers, flow switches, relief valves and pressure sensors have been utilized across various demanding applications. They offer high-purity performance in semiconductor production, safety in dangerous industrial environments and precision in hydrogen transportation applications.

Click on the markets below to learn which Malema flow control and measurement solutions can help you achieve your desired results.

View Our Markets

M-VF Series Excess Flow Valves Safety Excess Flow Valves For Automatic Shut-Off With Right Angle Flow

The M-VF Series Safety Excess Flow Valves are engineered for fast automatic shut-off in case of line, hose or fitting failures, protecting employees, plant, and valuable instruments. The M-VF Excess Flow Valves comes in five port sizes – 1/8", 1/4", 3/8”, 1/2” and 3/4” sizes, and the option to choose a FKM or FFKM o-ring for optimal chemical compatibility.

Designed for protection of systems handling corrosive, toxic, radioactive and flammable materials; the excess flow valve will instantly detect surge in the system and stop fluid flow. When the line break is repaired and pressure is equalized in the system, the excess flow valve will open to allow the fluid to flow through the system. The M-VF Series Excess Flow Valve operates effectively with all fluids, liquids or gasses.


  • High reliability
  • Field adjustable
  • Low pressure drop
  • Right-angle flow


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


  • Housing, End Plug, & Adjusting Screw: 316SS
  • Magnets in Adjusting Screws & Pistons: Alnico 5
  • O-rings: Viton
  • Piston: 316SS
Pressure and Temperature
  • Masimum Operating (psig): 3000
  • Burst (psig): 5000
  • Maximum Operating Temperature: Maximum Operating Temperature
Port Size (FNPT) Shut Off Range (Air / SCFM) Shut Off Range (Water/GPM)
1/8" 0.0177 5 0.00264 0.8
1/4" 0.12 35 0.0264 3.5
3/8" 3 60 0.1 4
1/2" 5 75 0.5 10
3/4" 15 130 1 20

For additional specification details, please refer to the product data sheet located in the downloads section of this web page.