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KITO – Combined Pressure and Vacuum Relief Valves

KITO Combination Pressure/Vacuum Relief Valves with Flame Arrestor Elements

CMC offers a comprehensive selection of valves for combining safe pressure relief and vacuum relief in an ever increasing range of critical applications.

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Deflagration and endurance burning proof pressure and vacuum relief valves

KITO® VD/KS-IIA-…-A, K

  • Certified for explosion group IIA substances with a maximum experimental safe gap (MESG) > 0.9 mm
  • Primarily deployed on fixed roof tanks to facilitate venting and inbreathing operations.
  • Aims to prevent excessive pressure or vacuum along with minimizing vapor loss and emissions.
  • Mounted atop storage containers for optimal functionality.
  • Offers an optional explosion- and endurance burning-proof condensate drain device.
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KITO® VD/KS-1-IIA-…-A, K

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  • Suitable for substances in explosion group IIA with a maximum experimental safe gap (MESG) > 0.9 mm
  • Designed for use with fixed roof tanks to enable both venting and inbreathing.
  • Helps in averting unnecessary pressure or vacuum situations.
  • Aids in reducing unwanted vaporization losses and emissions.
  • To be installed at the pinnacle of storage vessels for efficacy.
  • Option for an accompanying explosion-proof and endurance-tested condensate drain device.

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KITO® VD/KL-IIA-…-A, K

  • End-of-line armature designed for tank venting, featuring explosion-proof and endurance-burning proof specifications.
  • Ideal for managing volatile liquids, serving as both a venting and breather mechanism for fixed roof tanks.
  • Aims to prevent unacceptable levels of pressure and vacuum, reducing unwanted gas loss and emissions.
  • Compliant with materials classified under explosion group IIAwith a maximum experimental safe gap (MESG) > 0.9.
  • Valve housing is installed vertically atop the tank roof for effective operation.
  • Can be fitted with an explosion-proof condensate drain device upon customer request.
  • Includes an optional lifting lever for the lower valve disk to facilitate functional testing.
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KITO® VD/KL-1-IIA-…-A, K

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  • Functions as an end-of-line valve for venting openings on tank systems, offering explosion and endurance burning protection for specific flammable liquids.
  • Primarily operates as a venting and breather apparatus for fixed roof tanks, aimed at averting unacceptable pressure or vacuum scenarios, thus reducing unwanted gas losses and prohibited emissions.
  • Certified for usage with substances in the explosion group IIA with a maximum experimental safe gap (MESG) > 0.9.
  • Engineered with a housing that installs vertically on the roof of a tank for optimal efficiency.
  • Optional enhancements include an explosion-proof condensate drain device and a functional testing mechanism, featuring a lifting lever for the lower valve disk, available upon customer request.

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KITO® VD/MB-IIA-…-A, K

  • Designed as an end-of-line valve for tank venting openings, specifically geared towards handling flammable liquids within explosion group IIA.
  • Features explosion-proof and endurance-burning credentials for substances requiring a maximum experimental safe gap (MESG) > 0.9.
  • Functions as a venting and breather mechanism for fixed roof tanks to curb unacceptable pressure build-ups, vacuum formation, and to reduce undesired gas losses.
  • Allows for variable pressure settings to manage and minimize gas emissions effectively.
  • Offers the option of an explosion-proof condensate drain device, available upon customer request.
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KITO® VD/MB-IIB1-…

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  • Designed as an end-of-line flame arrester, providing protection against explosions and sustained burning conditions.
  • Applicable for all flammable liquids and vapors within explosion group IIB1, including alcohols, requiring a maximum experimental safe gap (MESG) ≥ 0.85 mm.
  • Not suitable for installation within enclosed spaces to ensure safety and compliance.
  • Primarily installed atop storage tanks, on tank access covers, or attached to breather pipes for maximum efficacy.
  • Functions as a vent and breather mechanism for fixed roof tanks, aiding in the prevention of unacceptable pressure levels, vacuum creation, and facilitates in gas loss reduction through adjustable pressure settings.
  • Offers the option of adding an explosion-proof condensate drain to the setup, available for an additional charge.

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KITO® VD/MC-IIA-…-A, K

  • Designed for flammable liquids within explosion group IIA, requiring a maximum experimental safe gap (MESG) > 0.9
  • Features explosion-proof and endurance burning proof capabilities for enhanced safety.
  • Acts as a venting and breather solution for fixed roof tanks, ensuring pressure and vacuum levels remain within safe margins.
  • Employs variable pressure settings through weight-loaded and/or spring-loaded valve mechanisms to mitigate gas losses effectively.
  • Offers the option to incorporate an explosion-proof condensate drain device for additional functionality.
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KITO® VD/MC-IIB1-…

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  • Designed as an end-of-line flame arrester for storage tank vent openings.
  • Suitable for all flammable liquids and vapors in explosion group IIB1, including alcohols, requiring a MESG of ≥ 0.85 mm.
  • Not approved for installation within enclosed spaces to ensure safety compliance.
  • Typically mounted atop storage tanks, on access covers, or along breather pipes for optimal effectiveness.
  • Functions as a venting and breathing mechanism for fixed roof tanks, aiding in the management of pressure levels, preventing vacuum conditions, and reducing gas losses.
  • Utilises variable pressure settings via weight-loaded valve devices to adapt to different operational needs.
  • Offers the option to integrate an explosion-proof condensate drain device for an additional cost, enhancing functionality.

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Pressure and vacuum relief valves

KITO® VD/o

  • Functions as an end-of-line fitting, serving as both a breather and venting device, specifically tailored for tanks containing flammable liquids.
  • Aims to avert unacceptable levels of pressure or vacuum within the tanks, thereby preventing potential hazards.
  • Additionally designed to minimize undesired gas losses and prevent emissions that exceed regulatory thresholds.
  • The valve does not carry explosion-proof or endurance-burning proof certifications, indicating specific usage limitations.
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KITO® VD/o-1

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  • Designed as an end-of-line armature, serving as a breather and venting mechanism, ideal for storage tanks holding flammable liquids.
  • Plays a pivotal role in mitigating unacceptable pressure levels or vacuum conditions within these storage units.
  • Efficiently reduces gas losses and curtails emissions that exceed prescribed safety standards.
  • The valve lacks features for explosion-proofing and endurance-burning proofing, marking its usage constraints.

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KITO® VD/o DN 25

  • Serves as an end-of-line armature, functioning as a venting and breather device, specifically for tanks containing incombustible liquids.
  • The valve’s primary role is to thwart unacceptable pressure or vacuum conditions, efficiently managing gas losses and limiting emissions.
  • It is important to note that the valve does not possess explosion-proof or endurance-burning proof capabilities.
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KITO® VD/oP

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  • Functions as an end-of-line fitting for storage tanks and silos containing powdered products and granulates.
  • Operates as both a venting and breathing mechanism to halt unpermitted pressure or vacuum formation.
  • Engineered with all moving components located externally to the main storage area for enhanced safety and durability.

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KITO® VD/oL

  • Designed as an end-of-line fixture for venting openings in tank setups.
  • Primarily functions as a venting and breathing apparatus for fixed roof tanks.
  • Aims to avert unacceptable pressure levels or vacuum conditions within tanks.
  • Additionally, it helps in reducing undesired gas losses and preventing impermissible emissions.
  • Features a housing that is installed vertically atop the tank roof for optimal performance.
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KITO® VD/oL-1

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  • Serves as an end-of-line component designed for venting ports on tank systems.
  • Functions primarily as a venting and breathing mechanism specifically for tanks with fixed roofs.
  • Prevents the development of unacceptable pressure or vacuum conditions inside tanks.
  • Aids in curbing unwanted gas losses and controlling unauthorized emissions.
  • The unit’s housing is strategically positioned vertically on the top of the tank roof for effective operation.

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KITO® VD/o2

  • Designed as an end-of-line fitting, ideal for tanks storing flammable liquids under inert gas.
  • Facilitates venting and breathing in both fixed roof and above-ground tanks.
  • Features a side connection point specifically for an inert gas conduit, enhancing safety and functionality.
  • Incorporates an upper valve arrangement including a pressure valve to block excessive pressure build-up.
  • The lower valve is tasked with automatically regulating the inflow of inert gas (such as nitrogen), maintaining optimal inert gas pressure within the tank.
  • Optimal inert gas pressure settings are outlined under setting II, offering clear guidelines for max admission pressure.
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KITO® VD/oG

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  • Serves as an end-of-line component specifically for venting ports on tank systems.
  • Primarily operates as a venting and breathing mechanism for tanks equipped with fixed roofs.
  • Aims to halt the formation of unacceptable pressure levels or vacuum situations within tanks.
  • Additionally, works to reduce undesirable gas losses and curb unauthorized emissions.
  • Features a design where the housing is vertically installed on the tank’s roof for optimal functionality.

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Deflagration proof pressure and vacuum relief valve

KITO® VD/AE-…-IIB3

  • Designed as an end-of-line fitting for tank venting and breathing.
  • Certified for atmospheric deflagrations within explosion group IIB3.
  • Requires materials to have a maximum experimental safe gap (MESG) of ≥ 0.65 mm.
  • Offers vertical mounting suitable for tank roofs.
  • Includes the option for an integrated elbow to facilitate installation.
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