Danfoss RT 260A (017D002466) Differential Pressure Switch

Product Overview

The RT 260A (017D002466) is a heavy-duty differential pressure switch engineered for precision regulation in demanding industrial environments such as power plants, chemical processing, and large-scale refrigeration. As a core component of the Danfoss RT series, this unit excels in monitoring the pressure difference between two points, providing critical safety interlocks for pump protection and filter monitoring. By implementing the RT 260A (017D002466), operators can effectively prevent equipment failure caused by cavitation or flow blockages, ensuring maximum system uptime in high-pressure hydraulic and steam applications.

Technical Configuration

The RT 260A architecture utilizes a sophisticated double-bellows system that mechanically compares two independent pressure inputs. The "A" designation signifies that this model is equipped with stainless steel bellows, making it highly resistant to aggressive media such as ammonia (R717) and other corrosive gases or liquids. This specific configuration operates within a regulation range of 1.5 to 11 bar with a fixed mechanical differential. The single-pole changeover switch (SPDT) provides versatile electrical logic, allowing the device to act as either a make-contact or break-contact trigger depending on the wiring configuration, ensuring seamless integration into existing DCS or PLC safety loops.

Technical Specifications

Technical FAQs

Does the RT 260A support ammonia (R717) applications?

Yes, the RT 260A is specifically designed with stainless steel components and high-grade seals to handle ammonia and other non-corrosive fluorinated refrigerants.

How do I adjust the setpoint for this differential pressure switch?

The setpoint is adjusted using the main setting knob located at the top of the unit. The value indicated on the scale represents the differential pressure at which the switch will activate on rising pressure.

Can this unit be installed in outdoor environments?

The RT 260A features an IP66 rated enclosure, providing excellent protection against dust and high-pressure water jets, making it suitable for outdoor installation provided temperature limits are respected.

Engineering & Installation Guide

• Piping and Connections: When connecting the High Pressure (HP) and Low Pressure (LP) lines, ensure the G 3/8 A threads are sealed with compatible materials. For ammonia systems, use only steel or aluminum washers; never use copper, as it will react violently with ammonia media.

• Mounting Orientation: For optimal performance and to prevent condensate buildup within the bellows, it is recommended to mount the switch with the cable entry pointing downwards. If high vibration is present (exceeding 4g), use reinforced mounting brackets to stabilize the internal switch mechanism.

• Electrical Safety: Ensure the power is disconnected before removing the cover. The SPDT contacts are rated for AC-1 (ohmic) and AC-3 (inductive) loads; if switching high-current motors directly, ensure an external contactor is used to prevent contact welding.