Pressure Switch

Introduction

• • The LF55 pressure switch is an automatic control device that responds to pressure signals and operates accordingly.
• • It can serve as a safety protection measure in various devices such as pumps, hydraulic systems, and hydraulic machinery.
• • Provide international standard mounting bracket for any part.
• • SPDT switch ensures reliable contact switching.
• • The pressure bellows of the standard model are phosphor bronze bellows, the pressure port is made of brass.

Working principle

By adjusting the screw of the pressure switch, the spring tension can be adjusted. The deeper the screw is screwed in, the greater the spring force that the measuring element must overcome, and the switch point value correspondingly increases. The geometric structure of the spring is designed according to the required switching range. According to the functional principle of mechanical pressure switches, the switching point is defined by the spring pre-tension, which sets the switching point when the pressure increases. When the external pressure acts on the pressure sensing element as the pressure decreases, the spring or diaphragm deforms accordingly. When the pressure reaches a certain level, the deformation of the spring or diaphragm causes a displacement in the mechanical structure, thereby closing or opening the contacts and changing the conductivity state of the circuit.

Widely used for reverse osmosis systems.

Specification

Notice

Use two spanners to avoid damaging the controller； Install to the equipment by four M4 screws on back side of the controller directly； Use multi-purpose mounting plate, it is also easy to install. Please use screws in attachment bag when installing.

Scale plate：two units-“bar”&“psig”；“MPa”&“Kgf/cm2”are also available；

British thread model can add“Ｅ”according to custom requirement，

Also wilding model add“Ｃ”, capillary model add“S”，such as LF5506E；

Ammonia refrigerant model add“B”，such as LF5506B.

Dimension

Wiring Instructions

Pressure Switch Pictures

External Thread: G 1/4” （Standard Version）	External Thread: 7/16-20” （Optional Version）

Installation Picture