Danfoss RT 200 Pressure Switch for Industrial & Utility Systems

A. Product Overview

The Danfoss RT 200 is part of the RT series of mechanical pressure switches for general industrial and marine applications. It features a pressure-controlled single-pole changeover (SPDT) contact system and is commonly supplied with minimum pressure reset functionality, making it suitable for safety-oriented control circuits.

RT pressure switches are known for their simple mechanical design, high accuracy, and long service life. The RT 200 is specifically selected for applications where pressure must recover to a safe level before manual or automatic restart is permitted, helping protect critical equipment.

B. Working Principle

The RT 200 operates using a bellows-based mechanical pressure sensing element. Process pressure applied at the inlet acts on the bellows, moving the internal spindle and actuating a snap-action SPDT contact system.

When the pressure falls to the set range value, the contacts change state to trigger an alarm or stop equipment. Reset is only possible once the pressure rises above the set value plus the mechanical differential, depending on the configuration. This operating principle ensures controlled restart and prevents repeated cycling under fault conditions.

C. Key Applications

• Lubrication oil pressure monitoring

• Industrial air and utility compressors

• Pump and circulation systems

• Cooling water and auxiliary circuits

• Power plant and utility equipment

• Marine engines and onboard auxiliary systems

D. Why Industries Use This Product

Industries use the RT 200 primarily for equipment protection and operational safety. In applications such as lubrication systems or utility circuits, restarting equipment before pressure is fully restored can lead to severe mechanical damage.

The RT 200 helps prevent such risks by enforcing pressure recovery before reset, reducing the chance of bearing failure, pump damage, or compressor seizure. Its mechanical reliability, repeatable switching accuracy, and widespread acceptance in RT-series installations make it a preferred choice for standardized and retrofit projects.

E. Suitable Buyers

• Industrial OEMs and system builders

• Power plant and utility engineering teams

• Marine system integrators and shipyards

• Maintenance and reliability engineers

• Procurement teams sourcing safety-oriented pressure switches

The RT 200 is commonly used as a replacement pressure switch in existing RT series installations and is preferred where minimum pressure protection is mandatory.

Quick Answers

What is Danfoss RT 200?
Danfoss RT 200 is a mechanical pressure switch used for monitoring and controlling pressure in industrial and utility systems with safety-oriented reset behavior.

Where is Danfoss RT 200 used?
It is used in lubrication systems, compressors, pumps, utilities, power plants, and marine auxiliary installations.

Why is Danfoss RT 200 required in industry?
It prevents equipment restart under unsafe pressure conditions, helping protect machinery and reduce failure risk.

Who typically uses Danfoss RT 200?
OEMs, utility engineers, maintenance teams, marine engineers, and industrial procurement professionals.

FAQ Section

Is Danfoss RT 200 suitable for lubrication and safety-critical systems?
Yes. The RT 200 is commonly used in lubrication oil and auxiliary systems where minimum pressure must be restored before equipment restart.

Can RT 200 be used for alarm and shutdown functions?
The SPDT contact system allows RT 200 to be used for alarm signaling, shutdown, and interlock control in industrial systems.

Is RT 200 suitable for continuous industrial operation?
RT pressure switches are designed for long service life and stable repeatability, making RT 200 suitable for continuous-duty applications.

Can RT 200 replace other RT series pressure switches?
Yes. RT 200 is commonly used as a replacement in RT series installations where minimum pressure protection is required.

Does RT 200 support standardized and safety-focused installations?
RT series pressure switches support standardized designs and are available with approvals suitable for industrial and marine safety applications.