Guardian Pressure Valve, NPS Connection
The Betts’ Guardian™ vent is a spring loaded reclosing pressure relief device/valve for use as a 407/412 cargo tank’s primary pressure relief system. The pressure relief valve is designed, tested and marked in accordance with 49CFR §178.345-10, 49CFR §178.347-4 and 49CFR §178.348-4.
- Compact, Optimized Flow Design.
- 316 Stainless Steel construction.
- Teflon seals and wear components.
- Safety Stop Screw to help prevent accidental unthreading of housing.
- Seal tabs on shroud for security measures.
- Simple In-place Maintenance.
- Available ECTFE (Halar®) coated.
- Multiple sizes and mounting options.
- Multiple seal options.
- 3″ & 4″ NPS Threaded Connection
Product Details
| Part Number | Size and Connection | Weight lbs. [kg] |
|---|---|---|
| RVP3N*-** | 3" NPS | 12.8 [5.8] |
| RVP4N*-** | 4" NPS | 13.2 [6.0] |
| - An Example of a part number would be RVP3AT-25. This would have PTFE seals and be used on a 25 MAWP tank. - Part numbers with ECTFE (Halar®) coating as follows: RVPL3A*-**. "L" indicates ECTFE coated. - Values shown are test values. Actual results may vary due to service conditions. |
||
| * Code | Material | Temp. Range |
|---|---|---|
| T | PTFE | -40°F - 400°F [-40°C - 204°C] |
| F | Fluorosilicone | -50°F - 350°F [-45°C - 176°C] |
| K | Kalrez | -20°F - 400°F [-28°C - 204°C] |
| VB | FKM BLT | -15°F - 400°F [-26°C - 204°C] |
| * Designates Seal Material | ||
| **MAWP | Size | Set Pressure (PSIG) | Pressure Flow | Water Flow Rates (GPM) |
|---|---|---|---|---|
| 25 | 3" | 30 | 379,462 SCFH @ 40 PSIG | 980 @ 40 psi |
| 25 | 3" | 30 | 409,558 SCFH @ 45 PSIG | 1050 @ 45 psi |
| 30 | 3" | 36 | 409,558 SCFH @ 45 PSIG | 1050 @ 45 psi |
| 35 | 3" | 42 | 457,740 SCFH @ 52.5 PSIG | 1075 @ 52.5 psi |
| 40 | 3" | 48 | 514,539 SCFH @ 60 PSIG | 1100 @ 60 psi |
| 25 | 4" | 30 | 389,482 SCFH @ 40 PSIG | 1000 @ 40 psi |
| 25 | 4" | 30 | 432,563 SCFH @ 45 PSIG | 1100 @ 45 psi |
| 30 | 4" | 36 | 432,563 SCFH @ 45 PSIG | 1100 @ 45 psi |
| 35 | 4" | 42 | 496,955 SCFH @ 52.5 PSIG | 1150 @ 52.5 psi |
| 40 | 4" | 48 | 564,486 SCFH @ 60 PSIG | 1200 @ 60 psi |
| ** Designates Tank MAWP | ||||
Seal Kits & Accessories
Seal Kit part number: SK-RVPT*
*Mounting gasket not included in seal kit
Spanner wrench part number: 75825EY
Dis-assembly wrench number : 75819ZC