Danfoss 060L315666 KPS 80 Thermostat with Capillary Tube

Product Overview

The Danfoss 060L315666 (KPS 80) is a specialized industrial thermostat featuring an integrated 3-meter capillary tube. This design provides significant installation flexibility, allowing the control unit to be mounted in a convenient location away from the high-temperature sensing point. Designed for demanding applications such as steam control, process heating, and heavy-duty climate regulation, the KPS 80 is renowned for its resilience against high vibration, shock, and harsh thermal cycles. It serves as a reliable, mechanical switching solution for plant environments where digital controllers may be exposed to excessive heat or electrical interference.

Technical Configuration

The KPS series is engineered for durability, offering a robust mechanical design that eliminates the need for external signal conditioning.

• Remote Sensing: The inclusion of a 3-meter capillary tube allows the thermostat bulb to be submerged in high-temperature media while keeping the sensitive switching electronics at a safe distance.
• Temperature Regulation: The KPS 80 provides an adjustable setting range of 70 – 120°C, suitable for critical temperature-controlled industrial processes.
• Adjustable Differential: The unit allows for an adjustable mechanical differential (4.5 – 18°C), enabling engineers to tune the switching threshold to match the specific thermal inertia of their process, thereby preventing unwanted mechanical wear from rapid cycling.
• Installation Versatility: This model is compatible with various sensor pocket lengths (65, 75, 110, or 160 mm), ensuring proper immersion in diverse pipe sizes and fluid volumes.

Technical Specifications

FAQs

What is the benefit of the 3-meter capillary tube?

The capillary tube allows the thermostat body—which contains the electrical switching contacts—to be mounted in a cool, accessible area, protected from the high temperatures (up to 220°C) and environmental hazards at the sensing point.

Can I shorten the 3-meter capillary tube if it is too long for my installation?

No. The capillary tube is a hermetically sealed, fluid-filled system. Cutting or kinking the tube will cause a permanent loss of fluid, rendering the thermostat useless and potentially causing the switch to lock into a permanently open or closed state.

Is this unit protected against vibration?

Yes. The KPS series is specifically designed for industrial applications where vibration is prevalent. Its mechanical internal components are built to resist "chattering" and signal drift caused by motors, pumps, or other nearby rotating machinery.

Engineering Guidelines and Best Practices

• Capillary Handling: When routing the capillary tube, avoid sharp bends. Maintain a bend radius of at least 25 mm to prevent stress fractures in the tube wall. Secure the tube with cable ties along its length to prevent it from rubbing against sharp metal edges, which could lead to a breach.
• Immersion Depth: Always choose the appropriate sensor pocket length (65, 75, 110, or 160 mm) so that the entire active portion of the thermostat bulb is fully submerged in the process media. Incomplete immersion will result in inaccurate readings and a sluggish response time.
• Calibration: After installation, verify the switching point by heating the media slowly and observing the contact state change on a multimeter. If necessary, adjust the setting knob carefully to calibrate the device to the specific thermal load of your system.