Emergency Relief Vents

The Groth 6000 and 2000 series range of Emergency Relief Valves are designed to provide emergency relief capacity over and above that provided by the normal operating pressure relief valve on the tank. The ERV protects the tank against rupture or explosion which can result from excessive internal pressures caused by an external fire.

Groth offer vertical lift (blow off) type ERVs, as well as hinged version which reseats itself and a spring loaded version which can be offered for high set pressures.

Spring/Weight Operated

104Key Features of the Groth Emergency Relief Vent include;

 

 Key Features
  • Blow-off and Self Seating options
  • Market leading sealing performance - air cushion seat design creates superior seal and is less prone to sticking than o-ring type seals
  • Self Draining Pallets prevent build up of water and potential to freeze shut/open
  • There are no elastomers in Groth valves as they break down over time in common applications
  • Construction in a broad range of materials including FRP

 

As with all Groth equipment, their ERV’s are manufactured to the highest standards and offer market leading performance and longevity.

Groth ERV’s come with a range of standard and custom options as follows;

 

Models 6000 series
  2100 series

2300 series 
 
2400 series
Sizes 16”, 20”, 24”
Pressure Setting 6.5 mbar (0.0065 bar) to 1035 mbar (1.035 bar)
Operation Weight Loaded (Hinged
  Weight Loaded (Vertical lift)
  Spring Loaded
Mounting Orientation Top Mount
Materials of Construction Carbon Steel
  Stainless Steel
  Aluminium
  Derakane (FRP)
  Furan (FRP)
  Exotics on request
Approvals ATEX

 

Pilot Operated

103The Groth Model 2500A pilot operated Emergency Relief Valve is designed to be self-closing - as excessive pressure builds up it relieves, then automatically reseats when overpressure has been dissipated.

Key Features of the Groth Pilot Operated Emergency Relief Vent include;

 

 Key Features

 

  • Documented compliance to EPA’s Method 21 testing (<500 ppm leakage at 90% of set pressure)
  • Full relief by 20% overpressure
  • Trim available in 316 SS or Hastelloy C
  • Designed to assist in meeting the requirements of the 1990 Clean Air Act Amendments as best available control technology.
  • Provides the capability to meet the leakage rate requirement of 500 ppm or less. A pilot-operated valve with large actuator is the only proven way to insure the necessary sealing force to meet the requirement.
  • Built of corrosion resistant materials throughout which allows it to be used in severe service environments such as with ethylene dichloride and methylene chloride.

 

Groth Pilot Operated ERV’s come with a range of standard and custom options as follows;

 

Models 2500 Series
Sizes 16”, 20”, 24”
Pressure Setting 5” WC to 6 psig
Operation Pilot Operated
Mounting Orientation Top Mount
Materials of Construction Carbon Steel
  Stainless Steel
  Aluminium
  Derakane (FRP)
  Furan (FRP)
  Exotics on request
Approvals ATEX