FLOW CONTROLLER (CSL)

A pneumatic FLOAT CONTROL CSL is a type of level control device that uses a float mechanism to sense the level of a liquid (e.g., water, oil, chemicals) and then uses compressed air (pneumatics) to transmit a control signal or actuate a valve. Key Features ?? Float Sensor: A buoyant object (the float) rises or falls with the liquid level, mechanically linking to a pneumatic component. Pneumatic Output: The movement of the float modulates an internal air relay or nozzle/flapper system to produce a variable pneumatic pressure signal (often 3-15 psi or 0.2-1.0 bar), which is proportional to the level change. Control Function: It typically operates in a continuous control loop to regulate flow into or out of a vessel, maintaining the level at a desired setpoint (CSL - Continuous Setpoint Level). Applications: Commonly used in industrial processes (like chemical plants, wastewater treatment) where reliable, explosion-proof level control is required, as pneumatic systems do not involve electrical circuits at the sensing point.