NVENT HOFFMAN PCFB1YZ Cont. flow, ext., Y and Z

Why Choose the nVent HOFFMAN PCFB1YZ Continuous Flow Purge and Pressurisation System?

The nVent HOFFMAN PCFB1YZ is an exterior-mounted continuous flow purge and pressurisation system designed to help protect electrical and electronic equipment installed in hazardous locations. Using a controlled supply of clean, dry air or inert gas, the system first purges potentially hazardous gases or dust from an enclosure and then maintains positive internal pressure to help prevent hazardous external atmospheres from entering.

Designed for Type Y and Type Z pressurisation applications, the PCFB1YZ combines a control unit, calibrated outlet orifice and relief valve to maintain continuous protective flow through the enclosure. Local visual indication provides system status, while a dry contact output enables connection to a remote alarm system when required.

The PCFB1YZ features exterior mounting and uses 316L stainless steel with a brushed finish for excellent corrosion resistance. It operates with a dry, clean air or inert gas supply between 60–115 psi (4–8 bar) and is typically recommended for enclosures with an internal volume of up to 17 ft³.

Key Advantages

• Continuous flow purge and pressurisation for hazardous-location enclosure protection.
• Supports Type Y and Type Z pressurisation applications.
• Exterior-mounted design simplifies installation and access.
• Exterior components manufactured from 316 stainless steel or corrosion-resistant composite materials.
• Local visual indication provides clear system status.
• Dry contact output supports remote alarm signalling.
• Uses clean, dry air or inert gas to maintain positive enclosure pressure.

Key Features

• nVent HOFFMAN purge and pressurisation system.
• Continuous Flow operating method.
• Exterior mounting.
• Type Y and Type Z certification configuration.
• 316L stainless steel construction with brushed finish.
• 3.18 mm material thickness.
• Protective gas supply pressure of 60–115 psi (4–8 bar).
• Operating temperature range of -20 to +55 °C.
• Continuous Flow system comprises a control unit, calibrated outlet orifice and relief valve.
• Local visual system status indication and dry contact remote alarm output.
• Typically recommended for enclosures up to 17 ft³ in volume.

Reliable Purge and Pressurisation for Hazardous Locations

Purge and pressurisation provides a practical method of protecting electrical equipment installed within hazardous environments. Before normal operation, the enclosure is purged with clean air or inert gas to remove potentially flammable gases or hazardous atmospheres. Positive internal pressure is then maintained so that the surrounding atmosphere is inhibited from entering the enclosure.

The PCFB1YZ uses the continuous flow method, maintaining positive pressure by continuously passing protective gas through the enclosure and controlling the exiting airflow through a calibrated outlet. Type Y pressurisation can permit suitably classified equipment to be used in a higher-risk location, while Type Z pressurisation can permit general-purpose equipment to be used in appropriate Division 2 or Zone 2 applications when the complete installation satisfies the applicable certification and safety requirements.

Typical Applications

• Hazardous-location electrical and electronic enclosures.
• Oil, gas and petrochemical processing installations.
• Chemical and process manufacturing facilities.
• Industrial control and automation systems.
• Instrumentation and monitoring enclosures.
• Electrical equipment installed in applicable Division 1, Division 2, Zone 1 and Zone 2 environments.