Pressure & Vaccum Relief Valves For Tanks

Tank pressure relief / vacuum relief valves are used on fixed-roof storage tanks and venting systems to manage normal tank breathing during filling, emptying, thermal expansion, or product cooling. The same device relieves vapour or gas when internal pressure exceeds the specified pressure setpoint and admits air or inert gas when vacuum conditions occur, protecting the tank shell against overpressure loading or deformation under vacuum.

This category includes KITO valve types E13, E13.1, E13.4, E14, E14.1, E15.2, E16.8, E16.8.1, E16.9.1, E16.9.2, E17, E17.1, E17.2, E17.4, E17.10, E17.10.1, E18, E20, E20.1, E21, E22.1, E23 and E25. The E13 series and related designs are specified as deflagration- and endurance burning-proof pressure/vacuum relief valves with integrated flame arrester, for products in explosion group IIA with MESG > 0.9 mm and maximum operating temperature 60 °C.

E17 series valves are used as end-of-line breather / venting devices for tanks storing non-flammable liquids and are not intended for explosion-proof or endurance-burning-proof service. By contrast, E20 and E20.1 types provide protection against atmospheric deflagration for explosion group IIB3 with MESG ≥ 0.65 mm and maximum operating temperature 60 °C, for vertical installation on tank roofs.

Valve selection should be based on pressure and vacuum setpoints, required inbreathing and outbreathing capacity, explosion group, operating temperature, chemical compatibility of wetted materials, allowable pressure drop, and whether flame arrester protection is required. Available configurations include DIN flanged connections, pressure classes PN 10 or PN 16, and body or trim materials such as 1.0619, 1.4408, 1.4571, or carbon steel. In service, attention should also be given to seat tightness, leakage behaviour near the setpoint, contamination risk, inspection access, and maintenance intervals for flame arrester elements and moving parts.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13 N | KITO Armaturen
KITO Armaturen GmbH
KITO VD/KS-IIA Pressure/Vacuum Relief Valve for Fixed Roof Tanks The KITO VD/KS-IIA-…-A / -K is a pressure and vacuum relief valve with integrated flame arrester, designed for installation on fixed roof storage tanks. It is mounted at the tank top to control venting and intake of vapor space, limiting overpressure, vacuum, vapor losses, and uncontrolled...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 13.1 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13.1 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 13.1 N – Pressure/Vacuum Valve with Flame Arrester The KITO VD/KS-1-IIA-…-A / -K is a self-actuated tank breather valve, equipped with integrated flame arresting for protection against ignition and sustained burning. It is installed on fixed-roof storage tanks to relieve overpressure and admit air under vacuum conditions, minimizing uncontrolled...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 13.4 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13.4 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 13.4 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 13.4 N – Pressure/Vacuum Relief Valve with Flame Arrester The KITO VD/KS-IIB1-… is a terminal tank breather valve with integrated flame arrester, designed for ignition and sustained burning protection. It is installed on storage tank roofs to control venting due to overpressure and vacuum conditions. Media and Operating Conditions Suitable for...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 14 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 14 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 14 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 14 N – Pressure/Vacuum Relief Valve with Flame Arrestor for Storage Tanks The KITO VD/KL-IIA-…/…-A / -K is a terminal tank breather valve designed for roof installation, providing both pressure relief and vacuum relief functions. It is applied on fixed-roof tanks to control unacceptable overpressure/underpressure, minimize vapor losses, and limit...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 14.1 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 14.1 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 14.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 14.1 N – Pressure/Vacuum Valve with Flame Arrester The KITO VD/KL-1-IIA-…/…-A / -K is a self-actuated tank breather valve designed for installation on fixed roof storage tanks at vent openings. It provides overpressure and vacuum protection, integrated with a flame arrester element for explosion group IIA vapors, and is suitable for continuous...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 15.2 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 15.2 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 15.2 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 15.2 N – Pressure/Vacuum Relief Valve with Flame Arrester The KITO VD/KL-IIB1-…/… is a terminal pressure/vacuum relief valve designed for storage tanks. It provides both pressure venting and vacuum relief functions. Installed on tank vent lines, it integrates mechanical pressure/vacuum regulation with a flame arrester element to prevent ignition...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.8 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.8 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.8 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 16.8 N – Pressure/Vacuum Valve with Flame Arrestor The KITO VD/MB-IIA-…/…-A / -K is a terminal tank breather valve designed for installation on tank vent nozzles. It is used on fixed roof storage tanks to control both overpressure and vacuum, while providing integrated protection against flame transmission and endurance burning. Application Scope...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.8.1 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.8.1 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.8.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 16.8.1 N – Pressure/Vacuum Valve with Flame Arrester IIB1 The KITO VD/MB-IIB1-…/… is a terminal tank breather valve with integrated flame arrester, designed for overpressure and vacuum control in fixed-roof storage tanks. Installation is on tank roofs, manways, or vent lines. Not suitable for enclosed indoor installation. Application Engineered for...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 16.9 N – Pressure/Vacuum Relief Valve with Flame Arrester The KITO VD/MC-IIA-…-A / -K is a terminal breather valve designed for fixed roof storage tanks. It provides overpressure venting and vacuum relief, incorporating integrated flame arrester elements to prevent flame transmission and endurance burning. Application Suitable for flammable liquids...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9.1 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9.1 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 16.9.1 N – Pressure/Vacuum Valve with Flame Arrestor The KITO VD/MC-IIB1-… is a terminal tank breather valve equipped with KITO BEH-3-80-IIB1 flame arrestor elements. Designed for installation on tank roofs, manway covers, or vent pipes in open environments. Not suitable for enclosed spaces. Used to control overpressure, vacuum, and vapor losses in...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9.2 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9.2 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 16.9.2 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 16.9.2 N – Pressure/Vacuum Valve with IIB3 Flame Arrestor The KITO VD/MC-IIB3-… is a terminal pressure/vacuum relief valve designed for installation on fixed-roof storage tanks. It provides overpressure venting and vacuum relief via weight- and/or spring-loaded mechanisms. Integrated flame arrestor elements limit flame transmission and are suitable...
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Pressure and vacuum relief valve - E 17 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 17 N | KITO Armaturen

Pressure and vacuum relief valve - E 17 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 17 N – Pressure/Vacuum Valve for Non-Flammable Liquids The KITO VD/o-… is a terminal breather valve designed for storage tanks containing primarily non-flammable liquids. It is used to limit unacceptable overpressure or vacuum conditions and to reduce vapor losses or unwanted emissions. This valve is not explosion-proof and is not suitable for...
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Pressure and vacuum relief valve - E 17.1 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 17.1 N | KITO Armaturen

Pressure and vacuum relief valve - E 17.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 17.1 N – Pressure/Vacuum Relief Valve for Non-Flammable Liquid Storage Tanks The KITO VD/o-1-… is a terminal breather valve designed for storage tanks containing non-flammable liquids. Its primary function is to limit unacceptable overpressure or vacuum conditions and to reduce vapor losses or emissions during tank breathing cycles. This model is...
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Pressure and vacuum relief valve - E 17.2 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 17.2 N | KITO Armaturen

Pressure and vacuum relief valve - E 17.2 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 17.2 N – Pressure/Vacuum Valve DN 25 The KITO VD/o-25 is a terminal breather valve designed for small tanks or auxiliary vessels primarily storing non-flammable liquids. Its function is to limit unacceptable overpressure or vacuum and to control vapor losses or emissions during tank breathing. This model is not explosion-proof and is not suitable...
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Pressure and vacuum relief valve - E 17.4 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 17.4 N | KITO Armaturen

Pressure and vacuum relief valve - E 17.4 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 17.4 N – Pressure/Vacuum Relief Valve for Silos and Solid Storage Tanks The KITO VD/oP-… is a terminal breather valve designed for installation on silos and storage tanks containing powders and granular solids. Its function is to relieve excess pressure and vacuum, preventing unacceptable mechanical stresses on the vessel shell. All moving...
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Pressure and vacuum relief valve - E 17.10 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 17.10 N | KITO Armaturen

Pressure and vacuum relief valve - E 17.10 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 17.10 N – Pressure/Vacuum Valve VD/oL The KITO VD/oL-…/… is a terminal breather valve designed for vent openings on fixed-roof storage tanks. It is used to limit unacceptable overpressure and vacuum, and to reduce vapor losses or emissions. This valve is not explosion-proof and is not suitable for continuous burning service. Sizes and Connections...
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Pressure and vacuum relief valve - E 17.10.1 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 17.10.1 N | KITO Armaturen

Pressure and vacuum relief valve - E 17.10.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 17.10.1 N – Pressure/Vacuum Valve VD/oL-1 The KITO VD/oL-1-…/… is a terminal breather valve designed for tank venting applications. It is primarily used on fixed-roof storage tanks to limit non-permissible overpressure and vacuum, and to reduce vapor losses or emissions. This model is not explosion-proof and is not suitable for continuous burning...
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Pressure and vacuum relief valve - E 18 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 18 N | KITO Armaturen

Pressure and vacuum relief valve - E 18 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 18 N – Pressure/Vacuum Valve with Inert Gas Connection The KITO VD/o2-… is a terminal breather valve designed for fixed roof tanks and above-ground storage tanks containing non-flammable liquids under inert gas blanketing. The valve features a lateral connection for inert gas supply, typically nitrogen, and is used where tank pressure control and...
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Deflagration proof pressure and vacuum relief valve - E 20 N | KITO Armaturen | Philippopoulos s.a.

Deflagration proof pressure and vacuum relief valve - E 20 N | KITO Armaturen

Deflagration proof pressure and vacuum relief valve - E 20 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 20 N – Pressure/Vacuum Valve with Flame Arrester The KITO VD/AE-…-IIB3 is a terminal tank breather valve designed for overpressure and vacuum relief. It is installed on tank vent openings and is certified for atmospheric flame transmission protection, but not for endurance burning scenarios. Application Range Suitable for explosion group IIB3 media...
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Deflagration proof pressure and vacuum relief valve - E 20.1 N | KITO Armaturen | Philippopoulos s.a.

Deflagration proof pressure and vacuum relief valve - E 20.1 N | KITO Armaturen

Deflagration proof pressure and vacuum relief valve - E 20.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 20.1 N – Pressure/Vacuum Relief Valve with IIB3 Flame Arrester The KITO VD/AE-1-…-IIB3 is a terminal tank breather valve designed for both overpressure venting and vacuum relief. The type certificate covers atmospheric flame arresting for explosion group IIB3 media, with MESG ≥ 0.65 mm and a maximum operating temperature of 60 °C. Difference from...
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Pressure and vacuum relief valve - E 21 N | KITO Armaturen | Philippopoulos s.a.

Pressure and vacuum relief valve - E 21 N | KITO Armaturen

Pressure and vacuum relief valve - E 21 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 21 N – Pressure/Vacuum Valve VD/oG The KITO VD/oG-… is a terminal breather valve designed for tank vent openings. It is primarily used on fixed-roof storage tanks to limit non-permissible overpressure and vacuum, and to reduce gas volume losses or non-acceptable emissions. Installation is vertical on the tank roof. Sizes and Settings DN 50, 80,...
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Deflagration proof pressure and vacuum relief valve - E 22.1 N | KITO Armaturen | Philippopoulos s.a.

Deflagration proof pressure and vacuum relief valve - E 22.1 N | KITO Armaturen

Deflagration proof pressure and vacuum relief valve - E 22.1 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 22.1 N – Pressure/Vacuum Valve with IIB3 Flame Arrestor The KITO VD/KG-PA-IIB3-… is a terminal breather valve designed for tank vent openings. It is installed vertically on fixed-roof tanks and provides both overpressure relief and vacuum protection, incorporating an integrated flame arrestor element. The technical documentation specifies that the...
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Deflagration proof pressure and vacuum relief valve - E 23 N | KITO Armaturen | Philippopoulos s.a.

Deflagration proof pressure and vacuum relief valve - E 23 N | KITO Armaturen

Deflagration proof pressure and vacuum relief valve - E 23 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 23 N – Pressure/Vacuum Relief Valve with IIB3 Flame Arrester The KITO VD/KG-IIB3-… is a terminal breathing valve designed for tank vent openings. It is installed vertically on fixed-roof tanks and serves to relieve both overpressure and vacuum conditions. The valve is type-tested and certified for atmospheric flame transmission in accordance with...
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Deflagration and endurance burning proof pressure and vacuum relief valve - E 25 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure and vacuum relief valve - E 25 N | KITO Armaturen

Deflagration and endurance burning proof pressure and vacuum relief valve - E 25 N | KITO Armaturen
KITO Armaturen GmbH
KITO E 25 N – Pressure/Vacuum Valve with IIB3 Flame Arrestor The KITO VD/KG-BEH-6-IIB3-… is a terminal breather valve designed for tank venting applications. Installed vertically on fixed-roof storage tanks, it combines overpressure and vacuum relief with integrated atmospheric flame arrestor functionality, certified for endurance against sustained...
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