KPS 79 060L314366 Danfoss Heavy Duty Thermostat 3m Capillary

Product Overview

The KPS 79 (060L314366) is a ruggedized industrial thermostat from the Danfoss KPS series, specifically engineered for precision temperature control and alarm monitoring in high-vibration maritime and industrial environments. Featuring a specialized setting range of 50 to 100 Celsius and an extended 3-meter capillary tube, this device allows for flexible remote mounting of the control housing away from the heat source. In critical applications such as engine cooling systems, industrial lubrication loops, and chemical process monitoring, the KPS 79 provides the durability required for continuous 24/7 operation. Its high-grade SPDT contact system and adjustable mechanical differential enable fine-tuned control of heating and cooling equipment, ensuring operational safety and efficiency in the harshest offshore and land-based sectors.

Technical Configuration

The hardware architecture of the KPS 79 is designed for survival in mechanically stressed environments. It utilizes a vapor-charged sensing system connected via a 3-meter armored capillary tube, allowing the sensing bulb to be placed deep within a process vessel while the switch housing remains in a more accessible location. The unit features an adjustable mechanical differential between 4 and 16 Celsius, providing the ability to customize switching cycles to prevent excessive actuator wear. The sensing element is rated for a maximum temperature of 200 Celsius, offering a substantial safety buffer for the 50 to 100 Celsius operating range. For versatile integration, the sensor bulb is compatible with multiple pocket lengths (65, 75, 110, or 160 mm), ensuring optimal immersion in various industrial piping and tank configurations.

Technical Specifications

Technical FAQs

What is the primary benefit of the 3-meter capillary tube on the KPS 79?

The 3-meter capillary tube provides maximum installation flexibility. It allows the switch housing to be mounted in a centralized control panel or a cooler environment up to 3 meters away from the hot medium. This protects the electrical terminals and the microswitch from direct thermal exposure and makes maintenance easier for the operator.

How do I adjust the mechanical differential to prevent pump short-cycling?

The KPS 79 features an internal adjustment screw that varies the differential between 4 and 16 Celsius. If your cooling pump is cycling too frequently, increasing the differential toward 16 Celsius will create a wider gap between the "cut-in" and "cut-out" points, effectively lengthening the operation cycles and protecting the motor from thermal stress.

Is this thermostat suitable for use in engine rooms with high vibration?

Yes. The KPS series is specifically designed for high-vibration environments, rated for 4 g (10-200 Hz). The internal components are mechanically dampened to prevent false switching or contact chatter, which is common in marine engine rooms or near heavy industrial reciprocating machinery.

Engineering & Installation Guide

• Capillary Tube Routing: When routing the 3-meter capillary, ensure a minimum bend radius of 25 mm. Avoid contact with sharp metal edges or high-voltage power lines. Secure the capillary every 500 mm to prevent it from vibrating against other surfaces, which could cause a leak in the vapor charge over time.

• Sensor Pocket Immersion: Select a sensor pocket length (e.g., 110 or 160 mm) that places the sensing bulb in the active flow of the medium. For the most accurate results, use a heat-conductive paste inside the pocket to minimize thermal lag and ensure the 50 to 100 Celsius range is monitored with high precision.

• Environmental Sealing: To maintain the enclosure's integrity, ensure the cable gland is tightened securely around the incoming control cable. In marine or outdoor installations, mount the unit with the cable entry facing downwards to create a drip loop, preventing moisture from entering the terminal chamber via the cable jacket.