Watson McDaniel R Series Relief & Back Pressure Valve, 75-300 PSI
Bronze Watson McDaniel R Series relief and back pressure regulating valve for liquid service, 75-300 PSI, for pump bypass, irrigation and fire protection systems.
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The R Series Back Pressure-Relief Valves are used for water pump bypass for irrigation, sprinkler systems on golf courses, fountains and fire protection systems, as well as fuel oil pump bypass on commercial or large residential systems.
Ideal for:
- Water pump bypass for irrigation
- Sprinkler systems on golf courses
- Fountains
- Fire protection systems
- Fuel oil pump bypass (commercial or large residential systems)
Key Features:
- Liquid service
- Bronze body and bronze seat
- Stainless steel valve (1/2″ – 1-1/2″ sizes)
- Max inlet pressure 300 PSIG
- 75-300 PSI range (per product listing)
- NPT connections
Watson McDaniel manufactures steam and fluid specialty products, including steam traps, pressure motive pumps, regulators and related accessories.
| Manufacturer | Watson McDaniel |
|---|---|
| Model | R Series |
| Product Type | Relief & Back Pressure Regulating Valve |
| Model | R Series |
|---|---|
| Service | Liquids |
| Body Material | Bronze |
| Seat Material | Bronze |
| Valve Material | Stainless Steel (1/2″ – 1 1/2″), Bronze (2″ – 3″) |
| Max Capacity (@ 20% Over Set Pressure, 3″ Size) | 16.0 GPM |
| Max Inlet Pressure | 300 PSIG |
| Pressure Range (per product titles) | 75-300 PSI |
| Series Sizes | 1/2″ – 3″ |
| Connections | NPT |
Available Variations
| SKU | Size |
|---|---|
| R-13-N-1 | 3/4″ NPT |
| R-14-N-1 | 1″ NPT |
