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Enclosure Pressure, Humidity & Condensation

If an enclosure is not protected from moisture penetration, condensation can accumulate on the components inside the enclosure. Outdoor enclosures can be the most vulnerable to condensation, because they are often installed in environments that have high ambient humidity levels. Condensation can cause damage to electrical components, as well as to the enclosures themselves. Some potential hazards include: corrosion, short circuits, premature breakdown, mold and water drainage issues. Installing devices such as heaters, fans, air conditioners and dehumidifiers can help to manage an enclosure’s internal temperatures. These devices are typically regulated by thermostats and hygrostats, which automatically trigger the fans and heaters when ambient conditions reach a certain temperature or humidity level.

Hazardous Location Breather Enclosure Drains prevent moisture build-up within hazardous location enclosures while maintaining the UL Type rating. Drains are to be used when an enclosure is subject to fluctuations in temperature which can lead to the formation of condensation and a subsequent moisture build-up. These drains allow air within an enclosure to breathe with the surrounding atmosphere, preventing condensation and any potential damage to electrical equipment.

Enclosure pressure compensation are devices that provide slow pressure equalization in tightly sealed enclosures that result from heat generated by electrical equipment within the enclosure and fluctuations of outside ambient temperature.

Enclosure hygrostats are devices that control the operation of a heater, turning it on when a preset relative humidity is exceeded inside of an enclosure. 

Enclosure dehumidifiers protect electrical equipment within an enclosure by removing moisture from the air caused by condensation.

Enclosure pressure purging is a protection method used to remove any internal explosive dust or gases through a purging process, followed by a pressurization of the enclosure with a protective air or inert gas. This results in a positive internal pressure which keeps any external explosive dust or gases from entering the enclosure.

Products

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$49.14
Hoffman 101072124SP Universal mountAvailable in two models for enclosures with a maximum enclosure volume of up to 2 or 10 cubic feetMounting plate: Type 316L stainless steelRegulator body: zinc with enamel finishEnclosure pressure gauge: aluminum with enamel finishPolycarbonate regulator handleFastener hardware available in aluminum and stainless steelIncludes tamper-proof regulator with gauge (TR-10G) to comply with NFPA standard requiring protection against over pressurizationNote: pressure Vent not required when inlet pressure limited to 5PSI using standard TR-10G. For inlet pressure over 5PSI order EPV-1-SA-00 or EPV-1-SA-90 separately. Contact HOFFMAN for pricing.
$63.57
Hoffman FLNGN38K4 Vertical mount (VM) or horizontal mount (HM)90 cubic feet maximum enclosure volumeSystem face plate and mounting plate: Type 316L stainless steelRegulator body: zinc with enamel finishManifold body: anodized aluminum with Type 316 stainless steel valvesEnclosure pressure gauge: aluminum with enamel finishGas supply gauge: poly case and nickel-plated tubeEnclosure protection vent—90 degreeRapid exchange control valveEnclosure supply and enclosure reference bulkhead fittings: Type 316 stainless steelFastener hardware
$7020.00
Hoffman ATEX3003YZVM Vertical mount (VM) or horizontal mount (HM)Available in 90 cubic feet maximum enclosure volume modelSystem face plate and mounting plate: Type 316 stainless steel tumble finishRegulator body: zinc with enamel finishManifold body: anodized aluminum with Type 316 stainless steel valvesEnclosure pressure gauge: aluminum with enamel finishGas supply gauge: poly case and nickel-plated tubeEnclosure protection vent (90 degree)Enclosure supply and enclosure reference bulkhead fittings: Type 316 stainless steelFastener hardware available in aluminum and stainless steelRapid-exchange control valveExplosion-proof differential pressure switch with “C” contacts for alarm
$6929.00
Hoffman ATEX3003YZHM Vertical mount (VM) or horizontal mount (HM)Available in 90 cubic feet maximum enclosure volume modelSystem face plate and mounting plate: Type 316 stainless steel tumble finishRegulator body: zinc with enamel finishManifold body: anodized aluminum with Type 316 stainless steel valvesEnclosure pressure gauge: aluminum with enamel finishGas supply gauge: poly case and nickel-plated tubeEnclosure protection vent (90 degree)Enclosure supply and enclosure reference bulkhead fittings: Type 316 stainless steelFastener hardware available in aluminum and stainless steelRapid-exchange control valveExplosion-proof differential pressure switch with “C” contacts for alarm
$38.09
Hoffman PCP Set of two piecesMounting hole diameter is 1.50 inches (38mm)
$322.40
Hoffman PCFSKIT Purge and Pressurization System Continuous Flow Service Kit Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.
$322.40
Hoffman PLCSKIT Purge and Pressurization System Leakage Compensation Service Ki Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.
$15977.00
Hoffman PLCS1X2 Purge and Pressurization System Leak Compensation Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.
$15977.00
Hoffman PLCS1X1 Purge and Pressurization System Leak Compensation Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.
$3149.90
Hoffman PCFB1YZ Purge and Pressurization Continuous Flow Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.
$3149.90
Hoffman PCFF1YZ Purge and Pressurization Continuous Flow Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.
$4518.80
Hoffman PLCB1YZ Purge and Pressurization System Leak Compensation Purge and Pressurization is a protection method used with Type 4, 4X and 12 (IP54 recommended minimum) enclosures. The enclosure is initially purged to remove any internal explosive gases or dust. Once this is accomplished, the enclosure is pressurized with a protective air or inert gas supply. This provides a positive internal enclosure pressure which keeps any external explosive gases or dust from entering the enclosure.