Guardian Pressure Valve, TTMA Flanged Connection

The Betts’ GuardianTM TTMA flanged pressure valve is a spring loaded reclosing pressure relief device/valve for use as a 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 un-threading 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
4″ TTMA flange connection has eight 3/8-16 UNC X .65 deep blind holes.

Parts List

Product Details

Part NumberSize and ConnectionWeight lbs. [kg]
RVP4F*-**4" TTMA FLG.19.9 [9.0]
- 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.
* Seal Material CodeMaterialTemp. Range
TPTFE-40°F to +400°F [-40°C to +204°C]
FFluorosilicone-50°F to +350°F [-45°C to +176°C]
KKalrez-20°F to +400°F [-28°C to +204°C]
VBFKM BLT-15°F to +400°F [-26°C to +204°C]
**MAWPSizeSet Pressure (PSIG)Pressure FlowWater Flow Rates (GPM)
254"30389,482 SCFH @ 40 PSIG1000 @ 40 psi
254"30432,563 SCFH @ 45 PSIG1100 @ 45 psi
304"36432,563 SCFH @ 45 PSIG1100 @ 45 psi
354"42496,955 SCFH @ 52.5 PSIG1150 @ 52.5 psi
404"48564,486 SCFH @ 60 PSIG1200 @ 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