Danfoss KP 36 Pressure Switch For Industrial Refrigeration Systems

A. Product Overview

Danfoss KP 36 is a heavy-duty mechanical pressure switch designed for controlling and monitoring pressure in industrial and commercial systems. It belongs to the well-established KP series, known for long-term reliability, mechanical robustness, and consistent switching accuracy in demanding operating conditions.

The KP 36 is primarily used in gaseous media applications and is commonly installed in refrigeration plants, HVAC equipment, compressed air systems, and industrial utility lines. It plays a critical role in protecting compressors, pipelines, and connected equipment by ensuring pressure remains within safe operating limits.

B. Working Principle

The KP 36 operates using a bellows-based pressure sensing mechanism connected to a snap-action electrical contact system. As system pressure rises or falls, the bellows actuates a mechanical linkage that triggers a rapid contact changeover at the preset pressure point.

The snap-action design minimizes contact chatter and electrical arcing, ensuring reliable switching even under vibration or fluctuating pressure conditions. Depending on configuration, the switch can function as a pressure cut-out, cut-in, or alarm switch with either automatic or manual reset.

C. Key Applications

• Industrial refrigeration compressors and condensing units

• HVAC chillers, package units, and cooling systems

• Compressed air and gas distribution systems

• Process utility skids in chemical and pharmaceutical plants

• Cold storage and food processing refrigeration systems

• Industrial boilers and heating systems (specific variants)

D. Why Industries Use This Product

Industries use Danfoss KP 36 primarily for system protection and operational safety. Pressure deviations can cause compressor damage, pipeline leaks, equipment failure, or unsafe operating conditions.

The KP 36 helps:

• Prevent overpressure or underpressure damage

• Protect compressors and rotating equipment

• Reduce unplanned downtime and maintenance costs

• Maintain compliance with industrial safety practices

• Standardize pressure control across OEM and retrofit installations

Without a reliable pressure switch, systems risk uncontrolled operation, premature component failure, and increased safety hazards.

E. Suitable Buyers

• Refrigeration and HVAC OEMs

• EPC contractors and system integrators

• Plant maintenance and utility departments

• Industrial refrigeration service providers

• Procurement teams handling MRO replacements

The KP 36 is commonly used for replacement in existing Danfoss KP installations and is preferred in standardized industrial refrigeration designs due to its compatibility and proven field performance.

Quick Answers

What is Danfoss KP 36?
Danfoss KP 36 is a mechanical pressure switch used for controlling, monitoring, and protecting industrial refrigeration and HVAC systems based on pressure limits.

Where is Danfoss KP 36 used?
It is used in refrigeration plants, HVAC systems, compressed gas lines, and industrial utility equipment across multiple process industries.

Why is Danfoss KP 36 required in industry?
It prevents equipment damage by ensuring pressure remains within safe limits, reducing downtime and improving system safety.

Who typically uses Danfoss KP 36?
OEMs, HVAC contractors, industrial maintenance teams, system integrators, and procurement professionals.

FAQ Section 

Q1. Is Danfoss KP 36 suitable for refrigeration compressors?
Yes. The KP 36 is widely used in industrial and commercial refrigeration systems for pressure cut-out, control, and alarm functions, helping protect compressors from unsafe operating conditions.

Q2. Can KP 36 be used as a replacement for older Danfoss pressure switches?
KP 36 is commonly used as a direct replacement within the Danfoss KP series, especially in standardized refrigeration and HVAC installations, subject to pressure range compatibility.

Q3. Does Danfoss KP 36 support automatic and manual reset?
Yes. The KP 36 is available in variants with automatic reset as well as manual reset, depending on safety and application requirements.

Q4. What type of media can be used with KP 36?
The KP 36 is primarily intended for gaseous media such as refrigerants and compressed gases, as specified in industrial refrigeration and HVAC systems.

Q5. Is Danfoss KP 36 suitable for industrial environments with vibration?
Yes. The KP series features a shock- and vibration-resistant design with snap-action contacts, making it suitable for industrial operating conditions when mounted correctly.