KPS units are pressure controlled switches. The position of the contacts depends on the pressure in the inlet connection and the set scale value. In this series, special attention has been given to meeting important demands for: • a high level of enclosure, • robust and compact construction, • resistance to shock and vibration. The KPS series covers most outdoor as well as indoor application requirements. KPS pressure switches are suitable for use in alarm and regulation systems in factories, diesel plant, compressors, power stations and on board ship.
The KPS series from Danfoss includes pressure‑controlled switches and thermostats for indoor and outdoor applications such as alarm systems, factories, diesel plants and ship installations. The document provides product descriptions, approvals, technical data, installation guidelines and accessory information.
Key features include robust IP‑67 enclosures, gold‑plated contacts, wide ambient temperature ranges, vibration resistance, and a variety of connection options. Detailed tables list pressure ranges, differential settings, contact loads and material compatibility for each KPS model.
| Contact load (AC‑1) | 10 A, 440 V |
|---|---|
| Contact load (AC‑3) | 6 A, 440 V |
| Contact load (AC‑15) | 4 A, 440 V |
| Contact load (DC) | 12 W, 220 V |
| Ambient temperature (KPS 31‑39) | -40 °C to +70 °C |
| Ambient temperature (KPS 43‑47) | -25 °C to +70 °C |
| Medium temperature (KPS 31‑39) | -40 °C to +100 °C |
| Enclosure protection | IP 67 |
| Weight (KPS 31‑39) | ≈ 1.0 kg |
| Scale accuracy (KPS 31) | +0.2 bar |
| Scale accuracy (KPS 43) | +1.0 bar |
| Vibration resistance | 2‑30 Hz, 1.1 mm amplitude; 30‑300 Hz, 4 G |
The switches are rated for 10 A at 440 V AC‑1, 6 A at 440 V AC‑3, 4 A at 440 V AC‑15, with a starting current up to 50 A.
The housing is sealed to IP 67 according to IEC 529 and DIN 40050.
They can operate in ambient temperatures from –40 °C to +70 °C.