Guardian Pressure/Vacuum Valve, TTMA Flanged Connection
The Betts’ GuardianTM combination valve is a spring loaded reclosing pressure and vacuum relief device for use on a cargo tank’s primary pressure relief and vacuum relief systems. The combination 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.
- Vibration damping vacuum vent.
- 4″ TTMA flange connection has eight 3/8-16 UNC X .65 deep blind holes.
Product Details
| Part Number | Size and Connection | Weight lbs. [kg] |
|---|---|---|
| RVC4F*-** | 4" TTMA FLG. | 18.2 [8.3] |
| - 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) | Set Vacuum (PSIG) | Vacuum Flow |
|---|---|---|---|---|---|---|
| 25 | 4" | 30 | 365,828 SCFH @ 40 PSIG | 1000 @ 40 psi | 1.5 | 12,500 SCFH @ 3.0 PSIG |
| 25 | 4" | 30 | 421,629 SCFH @ 45 PSIG | 1100 @ 45 psi | 1.5 | 12,500 SCFH @ 3.0 PSIG |
| 30 | 4" | 36 | 421,629 SCFH @ 45 PSIG | 1100 @ 45 psi | 1.5 | 12,500 SCFH @ 3.0 PSIG |
| 35 | 4" | 42 | 482,967 SCFH @ 52.5 PSIG | 1150 @ 52.5 psi | 1.5 | 12,500 SCFH @ 3.0 PSIG |
| ** Designates Tank MAWP | ||||||
Seal Kits & Accessories
Seal Kit part number: SK-RVCT*
*Mounting gasket not included in seal kit
Spanner wrench part number: 75825EY
Dis-assembly wrench number : 75819ZC