Paddle Flow Switch Operation

A flow switch operates by conveying a trip motion relay reed switch paddle to another machine within the system usually a pump.

Paddle flow switch operation.

Operation is simple and dependable. Malema flow switches are used in many applications for gases and liquids. 1 2 3 6 output. Up to 11bar both fs8 w fs8 wj are stocked parts.

Refer manual for flow setting vs pipe size paddle length process connection. 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. Switch with an enclosure that meets nema 4x provides protection from dirt washdowns and corrosive liquids. 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.

In the presence of fluid flow controlled movement of the piston actuates an external hermetically sealed reed switch this switch can be used to actuate audible or visual alarms as well as relays or other controls. Paddle flow switches or vane sensors with an electrical contact output are at a specific flow rate. Switch with a 316 stainless steel body is more corrosion resistant than switches with a brass body. 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. The trip signal will indicate to the pump to turn on or turn off. 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. 0 107 c pressure.

Flow switches are mechanical devices used in controlling the flow of air steam or liquid. 1 larger temperature. R1 bspt 1 npt pipe sizes. Mcdonnell miller fs 8 weatherproof paddle flow switch.

In most applications the switch is normally off while there is sufficient flow of liquid or air. The flow rate varies based on the pipe size and paddle used. At preset rates ranging from 50 cc min to 100 gpm gems switches will initiate alarm actuation or automatic shut down of a. Dwyer flow switches are economical and reliable.

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. 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. When the liquid is static or nonexistent the spring is fully extended pulling the magnet downward and opening the switch.