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Mechanical, Heavy Duty, Automatic Air Flow Control Valves

MCV-260 Mechanical, Heavy Duty, Automatic Flow Control Valve

Flow Control Valve
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This valve will control the air flow rate to ±5% of the set flow rate over a wide pressure differential. It is the best commercially available mechanical vacuum flow controller.  The unit operates by use of two diametrically opposed springs and a diaphragm that controls the valve opening. Depending upon pump capacity, flows between 0.5 to 10 CFM can be controlled by increasing or decreasing the spring tension with a wing nut found under the protective spring cover housing. Once set, the control valve will maintain a constant flow, ±5%, up to the capacity of the pump. This valve is a full Flow Controller not a “Flow Regulator” or adjustable orifice commonly found in the industry. Because the MCV-260 uses no make up air, nor “bleed-in” air to control the flow rate, the total volume of air sampled equals the total volume of air exhausted. This is ideal for applications requiring a Gas Meter to be hooked up to the exhaust (pressure application) of the sampler for totalizing the volume of air sampled.

Ordering Information


Mechanical Heavy Duty Automatic Flow Control Valve (3/8" Female NPT Inlet/Outlet).


Rebuild Kit: Replacement Buna “N” diaphragm and “O” Ring.


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