KPS 35 M/8 (060-310866) Danfoss Pressure Switch

Product Overview

The KPS 35 M/8 (060-310866) is a ruggedized, industrial-grade pressure switch specifically engineered for high-vibration and demanding maritime and heavy industrial applications. As part of the prestigious KPS series, the Danfoss 060-310866 (060-310866) is designed to monitor and control pressure in air, water, and steam systems where reliability is a mechanical necessity. This model features a high-durability bellows sensing element and a gold-plated SPDT (Single Pole Double Throw) contact system. The gold plating ensures high signal integrity for low-voltage PLC circuits while maintaining the capacity for standard power switching, making it a versatile component for B2B control architectures.

Technical Configuration

The KPS 35 M/8 is built for extreme environmental resilience, featuring a Pg 13.5 screwed cable entry with a professional metal cable gland that adheres to DIN 40430 standards. The internal bellows assembly provides a fixed differential of 0.4 bar (6 psi), ensuring precise and repeatable switching cycles even under fluctuating system pressures. Its enclosure and internal mechanisms are tested to withstand pressures up to 12 bar (174 psig). With an ambient temperature range of -40 °C to 70 °C, and a short-term tolerance for up to 80 °C, this switch is ideally suited for engine room environments and outdoor industrial installations.

Technical Specifications

Technical FAQs

Why are gold-plated contacts critical for the 060-310866?

The gold plating prevents the oxidation of contact surfaces. This is essential when the switch is used as a digital input for a PLC or electronic controller, where current is often very low (1–30 mA). Without gold plating, standard contacts might develop a film that prevents low-voltage signals from passing.

What is the significance of the "M/8" designation?

The M/8 designation typically refers to a specific version or marine-approved build standard within the KPS series, indicating enhanced resistance to high-frequency vibrations (up to 4g) and mechanical shocks common in ship propulsion and heavy pump systems.

Can this switch handle high inductive AC loads?

Yes, while optimized for signal integrity with gold contacts, it is robustly rated for standard power switching. It can handle AC15 (inductive) loads up to 4 A at 440 V and features a maximum Lock Rotor (LR) rating of 50 A.

Engineering & Installation Guide

• Vibration Mitigation: For installations on diesel engines, compressors, or other vibrating machinery, ensure the KPS 35 is mounted using the manufacturer-recommended bracketry. The bellows system is designed for these environments, but loose mounting can lead to electrical terminal fatigue.

• Enclosure Integrity: To maintain the IP rating, the metal cable gland must be tightened securely around the electrical cable. Ensure the Pg 13.5 entry is sealed correctly to prevent oil mist or moisture from entering the contact chamber, which is vital in maritime engine rooms.

• Pressure Interface: Use a suitable thread sealant when connecting to the system pressure line. When commissioning, perform a pressure test up to 12 bar to ensure the integrity of the connection. Avoid installing the switch at the bottom of a pipe run where sediment may accumulate in the bellows sensing element.