(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-KBFTQ5D'); Pressure/Vacuum Relief Valve Vent to Atmosphere - Groth Corporation


Pressure/Vacuum Relief Valve Vent to Atmosphere

The Groth Model 12E-TWW-0 Pressure/Vacuum Relief Valve that vents to atmosphere design was created to exceed industry needs. Extensive research and development has produced a product that achieves both superior sealing performance and industry leading flow rates, while also allowing customers to reach their required flow rates with a potentially smaller sized valve and utilize 10% overpressure technology. Costly product evaporative losses due to normal tank “breathing” are greatly reduced. The Model 12E-TWW-0 are superior sealing valves developed to minimize fugitive emissions while providing increased protection and safety to tank equipment and on-site personnel.


  • This valve is designed to utilize 10% overpressure technology
  • Product leakage and fugitive emissions are reduced via ultra-tight sealing
  • Higher flow capacity to protect from both excessive pressure and excessive vacuum build up
  • Peripheral and central seat guides ensure reliable, repeatable performance
  • Designed for easy maintenance, thus reducing downtime and operational cost
  • Size: 2” through 12”
  • Body Material: Aluminum, Carbon Steel, Stainless Steel
  • Pallet Material: Aluminum, Stainless Steel
  • Diaphragm Materials: Buna-N, Blue FKM or FEP
  • Weight Material: Zinc-Plated Steel, Stainless Steel
  • Bolting Class: 150# ASME, PN10, PN16, JIS drilling classes available
  • Available Pressure Settings: 0.5 osig to 24 osig
  • Available Vacuum Settings: 0.464 osig (2 mbarg) to 24 osig
  • Superior tightness, exceeding API-2000 leak requirements
  • PED and ATEX Certified
  • Vent to Atmosphere, Pressures up to 24 osig

• Corrosion resistance can be enhanced with FKM soft goods

Contact your rep to start an order or learn more.