WIKA PSM-520 Mechanical Pressure Switch with Settable Differential

The WIKA model PSM-520 is an electromechanical pressure switch that senses pressure changes and provides an on-off contact at a preset value. It is bellows actuated, compact and field adjustable, and is listed by WIKA for automatic start/stop of pumps and fire fighting applications with water, oil, air and other non-corrosive media.

Key features

• Bellows actuated, compact and robust
• Field-adjustable set point and on-off differential
• One SPDT contact: AC-1 10 A 230 V, AC-15 6 A 230 V
• Phosphor bronze bellows, galvanised steel housing

Technical specifications

• Process connection: G 1/4″ (1/4″ BSP female standard, 1/4″ BSPA male optional)
• Ambient temperature: -20 to +70 °C
• Medium temperature: -20 to +100 °C
• Repeatability: 2% of full scale
• Ingress protection: IP33
• Cable entry: Rubber grommet for Ø 6 to 14 mm cable

Typical applications

Jockey and main fire pump controllers, booster sets, water treatment and filtration skids, and alarm signalling on pressure loss in fire water networks.

Selection notes

Choose the model, size and range to suit the system working pressure, the installation point and the listing required by the project specification and Civil Defense approval. AZEIDK supplies complete trims and accessories and can check the selection against your drawings before ordering.

Supply and support from AZEIDK

AZEIDK supplies the WIKA PSM-520 in Saudi Arabia with technical selection, submittal preparation, installation, testing and commissioning, and maintenance through its engineering team, showrooms and warehouses in Jeddah, Riyadh and Dammam. The manufacturer datasheet is available for download on this page. Send your drawings, BOQ or specification to receive a technical and commercial offer, with technical follow-up from our team during execution and after handover.