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Enclosure Pressure, Humidity & Condensation

Enclosure pressure, particularly in electrical enclosures, plays a significant role in maintaining the integrity and functionality of electrical equipment. Applying positive internal pressure within the enclosure, often using inert gas or simply clean, dry air, helps in preventing the ingress of flammable gases, dust, and moisture, which are potential hazards in various industrial environments. This pressurization is essential in both indoor and outdoor enclosures, especially where the risk of explosive atmospheres or high ambient humidity levels exists.

Maintaining a positive pressure inside an enclosure means that the internal pressure is slightly higher than the surrounding atmosphere. This prevents moist air from entering the enclosure and creating conditions conducive to condensation. Condensation within an enclosure can lead to water droplets forming on electrical components, raising the risk of short circuits and corrosion. To combat this, methods such as applying corrosion inhibitor sprays and installing air conditioners or heaters are used. Heaters help in regulating the enclosure's internal temperatures, reducing the relative humidity inside and preventing condensation.

In environments where the temperature and humidity fluctuate, it's essential to continuously monitor the air inside the enclosure. Devices that automatically trigger the purging process or control the flow of protective gas can be installed. This ensures that the air within the enclosure remains dry and at a constant flow, effectively preventing condensation.

Products

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$50.70
Hoffman 101072124SP Inlet Ring for Motor Impeller 10.50x2.00x10.75
$65.52
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
$7230.60
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
$7137.00
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
$39.26
Hoffman PCP Set of two piecesMounting hole diameter is 1.50 inches (38mm)
$332.80
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.
$332.80
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.
$16456.70
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.
$16456.70
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.
$3244.80
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.
$3244.80
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.
$4655.30
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.