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Modulating control valves each with 4-20mA I to P converter linked to pneumatic a valve positioner controlling a diaphragm actuator. An air-operated valve, also known as a pneumatic valve, is a type of power-operated pipe valve that uses air pressure to perform a function similar to a solenoid.
The company develops, produces and markets actuators for controlling heating, ventilation and air conditioning systems. Actuators and control valves make up the company's core business, and it is considered a global leader in motor control for HVAC. [4] Newer products have integrated sensors and control electronics using ASICs.
The joint venture KSB Shanghai Pumps Co. Ltd. was founded in 1994. MIL Controls Ltd., Mala (Kerala), India, producer of ANSI valves and control valves, was acquired years later. In 2003 KSB took over Dutch pump supplier DP industries B.V., producer of pumps made of deep-drawn stainless sheet steel for building services and industrial applications.
Flow meters and control valves are manufactured at the Forbes Marshall facilities in Pimpri, Pune. The facility also boasts of a sophisticated calibration rig with the capability to calibrate flowmeters of up to 2000 mm. This NABL accredited rig is the second largest in Asia. [6] [14]
A control valve is a valve used to control fluid flow by varying the size of the flow passage as directed by a signal from a controller. [1] This enables the direct control of flow rate and the consequential control of process quantities such as pressure , temperature , and liquid level.
Air (or other gas) pressure is the power source for pneumatic valve actuators. [1] They are used on linear or quarter-turn valves. Air pressure acts on a piston or bellows diaphragm creating linear force on a valve stem. Alternatively, a quarter-turn vane-type actuator produces torque to provide rotary motion to operate a quarter-turn valve.