Paddle Flow Switch Operation

Mcdonnell miller fs 8 weatherproof paddle flow switch.

Paddle flow switch operation.

Flow switches are mechanical devices used in controlling the flow of air steam or liquid. At preset rates ranging from 50 cc min to 100 gpm gems switches will initiate alarm actuation or automatic shut down of a. In most applications the switch is normally off while there is sufficient flow of liquid or air. As flow occurs and the paddle is thrusted forward 20bc 30 c or more the paddle will push the magnet upward and actuate the switch closing the circuit.

The trip signal will indicate to the pump to turn on or turn off. Switch with a 316 stainless steel body is more corrosion resistant than switches with a brass body. When the liquid is static or nonexistent the spring is fully extended pulling the magnet downward and opening the switch. The flow rate varies based on the pipe size and paddle used.

Paddle flow switches or vane sensors with an electrical contact output are at a specific flow rate. R1 bspt 1 npt pipe sizes. Applications include proof of boiler flow air conditioning controlling of dampers according to flow and protecting pumps motors and other equipment against low or no flow. Malema flow switches are used in many applications for gases and liquids.

Switch with an enclosure that meets nema 4x provides protection from dirt washdowns and corrosive liquids. Spdt microswitch mains rated 120 240vac adjustable range. Paddle flow switches are for flow no flow detection in large line sizes engineered for positive liquid flow detection at pressures up to 2000 psig 138 bar unique patented cam design assures low pressure drop and does not require bellows seals or mechanical linkages. Dwyer flow switches are economical and reliable.

Flow switches are used to determine if the flow rate of a fluid is above or below a certain a set point which can be fixed or adjustable. Operation is simple and dependable. 1 larger temperature. Up to 11bar both fs8 w fs8 wj are stocked parts.

1 2 3 6 output. A flow switch operates by conveying a trip motion relay reed switch paddle to another machine within the system usually a pump. When flow stops the vane spring moves the vane actuating a single pole double throw switch rated 5a 120 250 vac to start or stop motor pump engine etc. Malema s application engineers are well trained and are ready to assist with custom calibration and sizing to deliver a flow switch that precisely suits your application.

Flow switch operating principle is based on a free floating magnetic piston which responds only to the motion of fluids within the line not to static or system pressures. Gems sensors offers a broad range of flow switch configurations for use in liquids or gases that feature high quality corrosion resistant materials for use in tough environments with material choices ranging from stainless steel to ryton for vast chemical compatibility. Flow switch can detect liquid movement in pipes.