This section provides an overview for constant flow valves as well as their applications and principles. Also, please take a look at the list of 10 constant flow valve manufacturers and their company rankings.
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A constant flow valve is a valve that maintains a set flow rate when there are pressure fluctuations on the inlet or outlet side.
It eliminates the need for control equipment that reacts to pressure fluctuations, thus saving cost and space.
Since no power source is required, fluids that are highly flammable or otherwise potentially hazardous can be handled safely. The set flow rate is predetermined by the valve, so there is no need for on-site adjustments.
Constant flow valves are used in equipment that requires flow distribution for each device or system, equipment that has an upper flow limit, etc.
Applications include controlling water supply up to a low tank, limiting the acceptance of large amounts of water, preventing damage to faucet fixtures and other equipment, saving water, and limiting the flow rate of hot water piping and air conditioning.
When pressure control is required, that cannot be controlled by constant flow valves, it is used with a pressure reducing valve. Due to water pressure countermeasures caused by the difference in elevation of a water pipe.
Depending on the structure and purpose, valves are classified into three types: rubber, spring, and differential pressure regulating valve.
The method using rubber adjusts the flow path area by the difference in pressure between the front and back sides caused by placing a plate with small holes in the flow path that allow rubber fluid to pass through, and by the elasticity of the rubber, thereby maintaining a constant flow rate.
The spring-loaded system consists of a valve seat, a spring, and a stem assembled in the valve plug, seat, and the pressure difference adjusts the flow path area to maintain a constant flow rate.
The system using a differential pressure regulating valve consists of a differential pressure regulating valve and a plate with small holes through which fluid passes, set flow rate range by the perforated plate. The set flow rate can be adjusted within the control range of the differential pressure valve, but the pressure on the outlet side cannot be adjusted, and it must be selected according to the intended use, paying attention to the specification range.
*Including some distributors, etc.
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Plast-O-Matic was formed in 1967 in New Jersey, now situated in Cedar Grove, New Jersey. Plast-O-Matic serves aquarium, chemical dosing, chemical processing, metal finishing, semiconductor, wastewater treatment, water purification, and government application industries. Product offerings include product data sheets, CAD downloads, installation & maintenance instructions, ball valves, check valves, gauge guards, pressure regulators, process cooling sticks, anti-siphon valves, shut-off and diverter valves, sight glass & level indicators, solenoid valves, venting valves, other process controls & pumps, and custom valves.
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