Pressure Gauge and Pressure Switch Settings//Pressure Gauge And Pressure Switch ko Setting Kaise.

Pressure Gauge And Pressure Switch Settings
Pressure Gauge And Pressure Switch Settings kaise kar
It seems you’re asking about “how a pressure switch works and how it’s set (its working principle and setting method)” — maybe you meant “pressure switch”, not “pressure sheet.”
Let’s go step-by-step 👇


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⚙️ Pressure Switch – Working Principle

A pressure switch is a device that automatically turns ON or OFF an electrical circuit when the pressure of air, water, or oil reaches a set value.

It works on a mechanical + electrical principle.
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🧠 Internal Working

1. Pressure Input:
Pressure from the system (pipe, tank, or pump line) enters the switch.

2. Sensing Element:
Inside the switch is a diaphragm, piston, or bellows that moves when pressure changes.


3. Spring Mechanism:
A spring opposes the diaphragm.
You can adjust the spring tension — that decides at what pressure the switch will operate (this is called the set point).


4. Electrical Contacts (Switch):
When pressure pushes the diaphragm enough to overcome the spring:

The contacts change state (either close or open the circuit).

This sends a signal to start/stop a pump, compressor, or alarm.
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🔁 How It Operates (Example)

Pressure Condition Switch Action Result

Below Set Pressure Contacts close Pump starts
Above Set Pressure Contacts open Pump stops


So, the pressure switch works like a gate — allowing current flow only when pressure is below or above the set point.

⚙️ Pressure Switch Setting Method

Here’s how you set it correctly:

1. Disconnect Power – for safety.

2. Connect Pressure Gauge – to monitor the actual system pressure.


3. Locate the Adjustment Screw – usually marked as Cut-in and Cut-out.


4. Adjust the Set Point:

Tighten spring → higher pressure setting.

Loosen spring → lower pressure setting.



5. Test Run:

Start system and watch pressure gauge.

Note when switch turns ON/OFF.

Fine-tune until you reach the desired ON/OFF press

📏 Example: Water Pump Pressure Switch

Cut-in Pressure: 2.0 bar → Pump starts

Cut-out Pressure: 4.0 bar → Pump stops

Differential Pressure (Hysteresis): 2 bar difference