Malema's valves provide instant shut off in the event of a hose break or line failure, preventing the release of hazardous or inflammable products to the area, which can result in a disatrous fire or explosion and untold damage to personel and equipment.

Note: All LPG tank cars and transport trucks are required by law to have excess flow valves installed. In addition, state LPG regulatory bodies require excess flow valves on all LPG storage vessels, storing products for domestic delivery and consumption.

As the fluid enters the valve, it flows through the orifice to the outlet. The orifice and tapered piston create a venturi effect, accelerating the flow through the valve. At a preset flow rate, the pressure differential offsets the spring-loading of the piston and shuts off the valve. Fluid can flow through the valve in either direction; however, the flow will be shut off in the direction indicated on the valve.

Adjustment is achieved by means of an externally adjustable screw that positions the pistons closer or farther away from the orifice. Turning the adjusting screw clockwise to reduce the flow area causes actuation at lower preset flows. Typically, Malema offers three springs for each valve, a light, medium, and heavy spring. These cover the entire trip range of a standard valve.

About us

Founded in 1981, Malema designs and manufactures measurement and control instruments for abrasive slurries, surfactants and high purity and corrosive chemicals.

Malema Flow Sensors products provide improved process control with new leading edge technologies for measurement.

Experienced in sensors, electronics, and process instrumentation, Malema incorporates ground breaking state of the art technologies into every instrument. Utilizing proven measurement techniques, clean room product assembly, and class 100 work surfaces, our products offer unmatched quality and reliability.

Partnering with other top of their class component manufacturers, Malema offers integrated solutions to fluid delivery and control systems.

Using components in the field of fluid measurement with accuracies that are unmatched by any other supplier, Malema offers world class solutions to extreme design challenges in Slurry and Chemical Delivery.

Malema has succeeded in making Peristaltic pumps obsolete from Semiconductor Supply of Slurries to Polishing processes by supporting and succeeding in delivering a solution to a premier OEM in this space.

Offering reliability, performance, and quick response times, our solutions deliver a new level of process control.

Leading companies in technology driven fields have chosen Malema's components for their critical flow sensor requirements. Malema's reputation for innovative, technical solutions guarantees a continuous supply of value-enhanced products. Malema's products are based on proven designs and are manufactured to meet the highest quality standards in the semiconductor, medical, laser, biotechnology, water treatment, chemical, and petrochemical industries. Malema excels in customizing flow products for its OEM customers.