Groth 2000A - Manual (Page 3)

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DESIGN, FUNCTION & OPERATION
The 2000A Series was designed as a cost effective valve that would protect a tank by providing
emergency pressure relief caused by fire or other factors that could make the pressure rise.
Groth manufactures four models in this series [Table 1] for pressure relief; two models also
provide vacuum relief.
Table 1 : Model Identification
Model Pressure Vacuum Description
2000A Y Guided Cover
2050A Y Y Guided Cover w/ vacuum relief
2400A Y Hinged Cover
2450A Y Y Hinged Cover w/ vacuum relief
Model 2000A provides pressure relief only; vacuum relief must be supplied by a separate
breather valve. Model 2050A provides pressure relief and vacuum relief through a spring
loaded port integral to the cover assembly. A weatherhood and screen are provided for
protection.
Model 2400A incorporates a hinged pivot point for the cover, providing additional alignment for
the cover so it reseats properly after venting. The Model 2450A adds vacuum relief capability
while keeping the hinge design. The hinged design closes after relieving pressure or vacuum.
All valve covers can be lifted off the base, providing quick access for tank inspection and
maintenance. Note: Depending on pressure setting, it may be necessary to use a crane or
other lifting device to open or remove the cover assembly. A typical tank installation is shown in
Figure 1 which includes a Pilot Operated Pressure/Vacuum Relief Valve, a Gas Blanketing
Regulator and the 2000A Emergency Relief Valve which provides emergency pressure relief.
Groth Corporation manufactures all of these devices.
Figure 1: Tank Installation - Safety Equipment