Model 710 Model PAF 406-98 Surge DOT 406 Pressure Relief Device
Betts PAF 406-98 Surge Suppression Pressure Relief Valve is the proven leader for cargo tank longevity, protection and safety.
The 406-98 incorporates a 10” (254mm) reclosing pressure relief valve (PRV) that satisfies primary pressure relief for specification US DOT406 and TC406 cargo tanks. The PRV meets the dynamic pressure surge requirements of 49CFR§178.345-10(b)(3)(ii) with less than one-liter leakage as tested per TTMA RP No. 81. The PRV cover also serves as a quick-open inspection hatch that incorporates a secondary safety catch. PPVL models include an overturn compensating 6496 P/V normal vent.
PAF 406-98 Surge PRV’s have a maximum service temperature of 212°F (100°C). Stainless versions of the PRV are available using prefix “PPSS”. See Betts’ line of PAF306 surge PRV’s for use on MC306 cargo tanks.
Product Details
| Part Number | Collar Material | Strongback and Latch | PRV Cover | Normal Vent | Weight |
|---|---|---|---|---|---|
| PPVL710BA* PPVL710BS* PPVL710CC* PPVL710DD* | Aluminum Steel 304 Stainless 316 Stainless | Steel Zinc-plated Steel Zinc-plated 304 Stainless 304 Stainless | E-Coated Aluminum E-Coated Aluminum E-Coated Aluminum E-Coated Aluminum | 6496AL Aluminum 6496AL Aluminum 6496AL Aluminum 6496AL Aluminum | 15.9 lbs (7.2 kg) 18.9 lbs (8.6 kg) 18.9 lbs (8.6 kg) 18.9 lbs (8.6 kg) |
| *Replace asterisk in part number to designate gasket material. Example Assembly: PPVL710BAB (10” PAF Pressure Relief Device, Zinc Steel Plated Strongback and Latch, Aluminum Collar + Black Nitrile Buna-N) |
|||||
| Letter | Gasket Material |
|---|---|
| B V P T W See catalog page S80P0A for full list. | Nitrile (Buna-N) FKM Type A (Viton™ A) EPDM PTFE (w/ Nitrile or Silicone Core) White Hypalon |
| Last Letter of part number designates seal material. See gasket material table. Suffix "059" option for padlock loop installed in strongback. Prefix "PSA" for both 6496 normal vent & 6234AL inbreathing vent included. Suffix "092" option with stainlesss hardware (strongback and latch). Collar material should correspond with tank shell material. When welding collars to tank, care should be taken to insure collar remains flat and round with use of a welding fixture if necessary. |
|
Technical Specifications
| PAF 406-98 Pressure Relief Valve | ||
|---|---|---|
| Set Pressure (PRV Designed for 3.3 psig MAWP tank) | Rated Air Flow Capacity | Liquid Flow Capacity |
| Min: 3.63 psig (25.0 kPa) Max: 4.55 psig (31.4 kPa) | 494,084 SCFH @ 6.25 psig (13,992 SCMH @ 43.1 kPa) 294,985 SCFH @ 5 psig (8,353 SCMH @ 34.5 kPa) | 1,335 gpm @ 5.0 psig (5,053 Ipm @ 34.5 kPa) |
| 6496AL Normal Vent (P/V Vent) | |
|---|---|
| Pressure | Vaccum |
| Pressure Set: Min. 1.0 psig (Min 6.8 kPa) Pressure Flow Capacity: 1,200 SCFH @ 3 psig (34 SCMH @ 20.7 kPa) | Vacuum Set: Max .375 psig (Max 2.6 kPa) Vacuum Flow Capacity: 3,350 SCFH @ 1 psig (95 SCMH @ 6.9 kPa) |
Prop 65
WARNING: This product can expose you to chemicals including Chromium (hexavalent compounds) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to: www.P65Warnings.ca.gov. For additional information on Betts products and Proposition 65 list please see: https://www.bettsind.com/prop-65/