VENT VALVES VENT VALVE - SUCTION RELIEF PART# CRACKING PRESSURE DESCRIPTION  752-B Open 0.5 PSI Differential Vacuum Breaker - only, with Nitrile [Buna-N] seals (vacuum pressure to open < 0.5 psi)  752-V Open 0.5 PSI Differential Vacuum Breaker - only, with Viton seals (vacuum pressure to open < 0.5 psi)  752-VH Open 0.5 PSI Differential Vacuum Breaker - only, with Viton seals and Hastelloy Spring (vacuum pressure to open < 0.5 psi) VENT VALVE - COMBINATION PRESSURE & SUCTION RELIEF PART# CRACKING PRESSURE DESCRIPTION  760 Open < 0.5 PSI Vaccumm Differential Combination Pressure/Vacuum with Nitrile [Buna-N] seals, SS Springs. Pressure Relief 1.5 PSI  760 DOT-B Open < 0.5 PSI Vacuum Differential Combination Pressure/Vacuum with Nitrile [Buna-N] seals. SS Springs. No leak 3.0 PSI. Pressure Relief 4.0 PSI  760 DOT-V Open < 0.5 PSI Vacuum Differential Combination Pressure/Vacuum with Viton seals. SS Springs. No leak 3.0 PSI. Pressure Relief 4.0 PSI For Technical Info Click Here Both Valves operate individually within the same housing. Click here for a flyer of the 752 Valves Click here for a flyer of the 760 Valves   Orders-caspinwelding.com Fittings | Driving Tools | Caps | Bulkhead Fittngs | Grommets | Tank Valves Lick Wheels | Covers | Special | Process | Ordering | Conditions