Description
In-Line Adjustable Pressure Relief Valves – Cast Iron
SPECIFICATIONS
The PRINCE valve model RV is a differential poppet type inline relief. The valve is made up of a relief cartridge and a cast iron valve body. The differential poppet type relief provides smooth quiet performance with a minimum variation between cracking and full flow pressures. This type relief is also less sensitive to system contamination. The model RV is well suited as a system relief up to 30 GPM and 3000 psi. It is available in two pressure ranges and both an externally adjustable and shim adjustable version.
| Stock No. | Description | Port Size | Max. Flow Rate | Adjustment Range | Preset Pressure |
| RV1L | In-Line Relief Valve with Through Port | 1-1/6” UNO | 30 GPM | 500-1500 PSI | 1000 PSI |
| RV1H | In-Line Relief Valve with Through Port | 1-1/16” UNO | 1500-3000 PSI | 2000 PSI | |
| RV4L | In-Line Relief Valve with Through Port | 1/2” NPT | 500-1500 PSI | 1000 PSI | |
| RV4H | In-Line Relief Valve with Through Port | 1/2” NPT | 1500-3000 PSI | 2000 PSI | |
| RV5L | In-Line Relief Valve with Through Port | 3/4” UNO | 500-1500 PSI | 1000 PSI | |
| RV5H | In-Line Relief Valve with Through Port | 3/4” UNO | 1500-3000 PSI | 2000 PSI |







