Fire Systems Pressure Reducing Valve
A fire system pressure reducing valve holds the outlet pressure at the set value however high the inlet pressure is. In tall buildings it prevents the pump pressure from being too high for sprinklers and hose cabinets on the lower floors.
The store range includes grooved-end models in PN20 class in 2″, 2½”, 3″, 4″, 6″ and 8″. They are used at floor and zone inlets, on hose cabinet feed arms and on risers divided into pressure zones.
Main Applications
- Lower-floor zone inlets in tall buildings
- Hose cabinet feed arms
- Risers divided into pressure zones
- Inlets with high mains pressure
Technical Data
| Function | Keeping outlet pressure constant |
|---|---|
| Pressure class | PN20 (product range) |
| Connection | Grooved ends (product range) |
| Size | 2″, 2½”, 3″, 4″, 6″, 8″ (product range) |
| Outlet pressure | Adjustable (range by model) |
| Control | Pilot operated (by model) |
| Gauges | Inlet and outlet gauge ports (by model) |
| Material | By model |
Material Options
| Part | Pressure reducing valve |
|---|---|
| Body | By model |
| Diaphragm | By model |
| Pilot circuit | By model |
| Connection | Grooved end |
Which material? Size and PN20 class are taken from store products; the outlet pressure range and materials are confirmed for the selected model. A strainer at the valve inlet is recommended.
Advantages
Constant Outlet Pressure
- Outlet stays steady even if inlet fluctuates
Equipment Protection
- Sprinklers and cabinets protected from overpressure
Grooved Installation
- Fast coupling connection
Zone Control
- Each zone set separately
Construction and Design Features
- Main valve and pilot control circuit
- Diaphragm sensing outlet pressure
- Grooved inlet and outlet ends
- Gauge connection points (by model)
Write the inlet pressure, required outlet pressure and line size; we will define the right pressure reducing valve.
How to Choose?
- Define the pressuresWrite the inlet and required outlet pressure.
- Select the sizeChoose the valve size for the zone flow.
- Add a strainerPlan a Y-strainer at the valve inlet.
- Plan setting and testingVerify the outlet pressure with a gauge at commissioning.
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Why ORFA?
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