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Fire Protection Pressure Switch

Name: China Fire Protection Pressure Switch Manufacturers Suppliers Factory - CA-Fire Protection
Brand: CA-FIRE
SKU: 303872184

A precision hydraulic sensing device for automatic sprinkler and hydrant systems. Detects alarm valve activation to trigger fire alarms and start fire pumps via reliable electrical contacts. Rated ≥1.2 MPa with adjustable settings for jockey pump control. Vertically mounted on alarm piping with waterproof wiring. Suitable for wet, dry, deluge, pre-action, and water curtain systems. UL/FM certified options available.

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Description

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Products Description

Fire Protection Pressure Switch

A Pressure Switch is a critical sensing device in fire protection water-based systems. When an alarm valve opens, water fills the alarm piping, and the pressure switch detects the hydraulic pressure to close electrical contacts. This outputs signals indicating alarm valve activation and fire pump start command. When the alarm valve closes, the electrical contacts open automatically.

In automatic sprinkler systems, the pressure switch serves dual functions: alarm initiation and pump control. It is essential for wet, dry, deluge, and pre-action systems, as well as for hydrant systems and pressure maintenance (jockey) pump control.

Installation Requirements

The pressure switch must be vertically installed on the piping leading to the water motor gong (hydraulic alarm bell), downstream of the alarm valve retard chamber. Installation must follow fire protection design documents or manufacturer drawings - no disassembly or modification is permitted during installation. Lead wires must be secured with waterproof conduit, verified by visual inspection.

For automatic sprinkler systems, the pressure switch controls both the fire pump and jockey pump, with adjustable pressure settings for jockey pump start/stop operation. Deluge systems and fire-separation water curtain systems should use pressure switches as their water-flow alarm devices, as the rapid water velocity during system activation can damage conventional flow indicators.

Inspection & Testing Requirements

Every pressure switch must carry a clear nameplate with safety operation instructions and a product manual. All components must be free from loose parts, machining defects, corrosion, coating peeling, blistering, or burrs. During performance testing, connect the normally-open or normally-closed contacts with a multimeter, actuate the pressure switch, and verify reliable circuit make and break operation.

For sprinkler systems, 100% of installed pressure switches must undergo functional verification - no sampling is permitted.

The hydraulic strength test requires pressurizing the switch to 1.5 times its rated working pressure (1.8 MPa for a 1.2 MPa rated unit) within 5–10 seconds, holding for 5 minutes, then checking for leaks and mechanical damage. After the strength test, an actuation test confirms continued proper operation.

Why Choose Our Pressure Switch

Our pressure switches deliver reliable pressure sensing with precise hydraulic detection for timely alarm and pump activation. The dual-function design handles both alarm signaling and pump control in a single device. Adjustable settings allow customizable pressure thresholds for jockey pump and system-specific requirements. Each unit passes a 1.5× pressure strength test and is rated for ≥1.2 MPa working pressure. Vertical mounting on standard alarm valve trim and waterproof wire protection simplify installation. Full compatibility covers wet, dry, deluge, pre-action, hydrant, and foam-water systems. Every unit undergoes 100% functional testing for reliable contact operation before delivery.