Causes and Treatment Methods Fault of Differential Pressure Switch

1. No Output signal from differential pressure switch

Cause analysis:

(1) Microswitch damaged:

---Replace microswitch

(2) The switch setting point is set too high,

---Adjust to appropriate setting value

(3) The wire of the microswitch is not well connected,

---Reconnect for microswitch

(4) The pressure sensing part is poorly assembled and has stuck,

---Reassemble for Agility

(5) Damage of pressure sensing element,

---Replace the pressure sensing element

Recommended Products:

Mechanical Differential Pressure Switches

A.YITE Brand 101NN type Mechanical Dfferential Pressure Switches
Higher static Pressure, Large adjustable range


2. Fault phenomenon: Sensitivity of Differential pressure switch is not enough

(1) Poor assembly /excessive friction of transmission mechanism (ejector pin or plunger, etc.)

---Reassemble for Agility

(2) Contact stroke of microswitch is too long

---Reasonable adjustment of contact stroke of microswitch

(3) Improper adjustment of adjusting screw, ejector pin, etc

---Adjust the position of nail and top bar reasonably

(4) Improper installation, such as uneven and inclined installation solutions:

---Change to vertical or horizontal installation

Recommended Products:

Differential Pressure Flow Switches for variable flow primary pumping system

GE-511A Differential Pressure Switches to detect the water flow of pump


3. Fault phenomenon: Signal sending is too fast from differential pressure switch:

(1) Large inlet damping hole

The damping hole shall be properly reduced, or the damping pipe shall be added on the control pipe

(2) Broken diaphragm

---Replace the isolation diaphragm

(3) The impact pressure of the system is too high

---Add damping pipe on the control pipeline to reduce the impact pressure

(4) Solutions to the errors in the design of electrical system

---Design electrical system according to process requirements

Recommended Products:

Air Differential Pressure Switches

Air Differential Pressure Switches for Exhaust Fans

GE-924 Adjustable Air Differential Pressure Switch for monitoring over...



Contact: Mr.Robert

Phone: 0086-13166369204

Tel: 400-852-8332


Add: Building 17 &22, No.2928, Chuan Zhou Highway, Shanghai, 201319, China