A danfoss pressure switch is a device that operates an electrical contact when a preset fluid pressure is reached. The switch makes an electrical contact on either pressure rise or pressure fall from a certain preset pressure level. Pressure switches are in a wide range.
A danfoss pressure switch should not be confused with a pressure transducer. A pressure transducer converts pressure into an electrical output signal. Read our pressure transducer technical article to learn more about them.
Mechanical pressure switch
A mechanical pressure switch uses a spring and a diaphragm, or piston, to control at what pressure the micro-switch is triggered. The spring is the opposing force to the inlet pressure and the springs pretension is adjusted with a set screw or knob. The spring pretension directly correlates to the pressure at which the switch makes an electric contact. When the pressure drops, the switch resets to its original state.
The difference between the switch point and reset point is called hysteresis. Often this is expressed as a percentage of the switch point value, for example, 20%. The manufacturer defines the hysteresis, and for most mechanical switches, it is not configurable by the user.
These pressure switches usually have three different types of contact: normally open (NO), normally closed (NC), and changeover (SPDT) contacts. Changeover contacts are for both NO and NC operation.
The mechanical pressure switch is better suited for handling high voltages and amperages than an electronic pressure switch. They can be used to make a contact change for an increase or decrease in pressure.
FAQs – Danfoss Pressure Switch KP 35 / KP 36:
1. How does the Danfoss pressure switch help in maintaining system safety?
The Danfoss pressure switch KP 35 / KP 36 ensures system safety by providing accurate pressure monitoring and reliable cut-in/cut-out control in industrial and HVAC applications.
2. Is the Danfoss pressure switch KP 35 / KP 36 suitable for refrigeration and air-compressor systems?
Yes, the Danfoss pressure switch is widely used in refrigeration, air-compressor units, and general-purpose industrial systems due to its dependable pressure regulation.
3. Can the Danfoss pressure switch withstand harsh operating environments?
The Danfoss pressure switch KP series is built with robust materials and shock-resistant design, making it suitable for demanding and high-vibration environments.
4. How easy is it to adjust the setpoints on a Danfoss pressure switch KP 35 / KP 36?
Setpoint adjustment on the Danfoss pressure switch is simple and precise, allowing technicians to fine-tune pressure ranges for specific application needs without complexity.
Solid build quality and dependable performance. Easy to install and adjust. KP 36 model gives precise cut-in and cut-out control.
Excellent pressure switch from Danfoss! Very accurate and reliable. The KP 35 works perfectly for controlling compressor pressure. Highly satisfied with performance
Excellent pressure control device. Very durable and consistent in performance. Perfect for both industrial and commercial systems
Danfoss never disappoints. The KP 35 switch is highly responsive and easy to calibrate. Works great in HVAC and refrigeration applications.
Top-quality pressure switch! We’ve used it in our air compressor setup and it performs flawlessly. Great durability and accuracy