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Enclosure Pressure Purging

Purge and pressurization systems are used to ensure that once an enclosure is purged and pressurized with a protective gas supply, the electrical equipment inside the enclosure can be powered on. The purge process is used to remove any potentially hazardous gas from inside the enclosure. The purge cycle displaces any explosive gas with an inert, protective gas. The pressurization process creates a higher internal pressure by providing a protective gas supply, which prevents any hazardous gas or dust from entering the enclosure. Any leaks in the enclosure will have protective gas exiting instead of hazardous gas or dust entering. 

Two methods of purge and pressurization are: continuous flow and leakage compensation. Continuous flow provides an uninterrupted, steady flow of air into the pressurized enclosure. This is maintained after the purge process and keeps the internal enclosure pressure higher than the surrounding atmosphere. Continuous flow systems are typically used with smaller enclosures (less than 17 cubic feet) or with enclosures that are infrequently used. Leakage compensation uses a controller to regulate a smaller flow of air into the enclosure to maintain the minimum required pressure and to compensate for any leaks. Leakage compensation uses an initial high flow rate purge to clear any hazardous gases and is suitable for any size 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
$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.
$4518.80
Hoffman PLCF1YZ 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.