Vacuum Relief Valves

Vacuum Relief Valves allow a tank to vent (breathe in) during emptying and when thermal effects require.

Spring/Weight Operated

Key Features of the Groth Vacuum Relief Valve include;

Key Features

Market leading sealing performance - API2000 states that a valve should hold 75% of its set point at constant flow of 15l / hour – Groth’s production standard is 90% in models up to an including 6”

Self Draining Pallets prevent build up of water and potential to freeze shut/open

Air cushion seat design creates superior seal and is less prone to sticking than o-ring type seals

There are no elastomers in Groth valves as they break down over time in common applications

As with all Groth equipment, their Vacuum Relief Valves are manufactured to the highest standards and offer market leading performance and longevity.

Groths Vacuum Relief Valves come with a range of standard and custom options as follows;

Models	1300 series
Sizes	2” to 12”
Vacuum Settings	2.1 mbar (0.002 bar) to 820 mbar (0.82 bar)
Options	Free Venting outlet
	Pipe-away outlet
	Flame Arrester
	Steam Jacket
Operation	Weight Loaded
	Spring Loaded
Mounting Orientation	Top Mounted
	Side Mounted
Materials of Construction	Aluminium
	Carbon Steel
	Stainless Steel
	Derakane (FRP)
	Furan (FRP)
	Exotics on request
Approvals	ATEX

Pilot-Operated Vacuum Relief Valves

Pilot operated vacuum relief valves allow a tank to vent (breathe in) during emptying and when thermal effects require, but with much higher pressure settings than a weighted or spring loaded valve.

Key Features of the Groth Pilot Operated Vacuum Relief Valve include;

Key Features

High Flow Capacity

Bubble tight to set pressure

Fully open at less than 10% above set pressure

Inherent backflow prevention

Easily adjustable blowdown

Film design seat meets EPA method 21

Full pipe bore seat nozzle

As with all Groth equipment, their Pilot Operated Vacuum Relief Valves are manufactured to the highest standards and offer market leading performance and longevity.

Groth Pilot Operated Vacuum Relief valves come with a range of standard and custom options as follows;

Models	1600 Series
Sizes	2” to 12”
Vacuum Settings	2.1 mbar (0.002 bar) to 820 mbar (0.82 bar)
Max. Operating Temp.	150 degC
Min. Operating Temp.	195 degC
Operation	Pilot Operated
Mounting Orientation	Side Mount
Materials of Construction	Aluminium
	Carbon Steel
	Stainless Steel
	Multiple Pilot Valve Material Options
	Specials upon request
Approvals	ATEX

Atmospheric Venting and Low-Pressure Storage Tanks

Vacuum Relief Valves

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