STjh floor-standing 375 CFM HEPA pass box with top filter module, side returns and open cart threshold

STJH-FLOOR-STANDING-PASS-BOX-HEPA-375

Floor-Standing HEPA Pass Box 375 CFM

An open-floor cart transfer cabinet with internal 375 CFM HEPA recirculation for loads that need active particle control.

375 CFM internal recirculation
99.99% HEPA filtration
Open-floor cart access

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Product Introduction

This filtered floor-standing model retains the threshold-free cart path but adds a motorized HEPA unit inside the cabinet. Air recirculates at 375 CFM through perforations in the inner side panels and a 99.99% HEPA stage. It serves larger parts and wheeled loads that need more protection than the passive standard cabinet, while remaining distinct from a high-velocity cargo air shower.

Key Features

Filtered cart transfer

Active recirculation helps control airborne particles around wheeled loads during the closed-door interval.

Side-return airflow path

Perforated inner panels provide distributed return openings without adding a raised transfer floor.

Dedicated 120 V fan unit

The listed 0.83 A motorized filter package can be planned as a discrete cleanroom utility load.

Technical Parameters

Mounting	Floor-standing at the room boundary
Transfer Floor	No integrated floor
Recirculation Airflow	375 CFM at 110 ft/min
Final Filter	99.99% HEPA
Air Return	Perforated stainless inner side panels
Fan Electrical	120 V, 60 Hz, 0.83 A
Construction	Formed and stitch-welded type 304 #4 stainless steel
Door Hardware	Compression latches, continuous hinges and closed-cell gaskets
Interlock	Mechanical option with type 316 stainless handles
Customization	Available based on the intended application and operating environment.

Applications

For carts, large component kits and production fixtures entering cleanrooms where the transfer enclosure should actively recirculate filtered air. Confirm that 375 CFM is appropriate for the selected chamber size and load blockage, and preserve service clearance for fan and filter replacement.

Solutions for Your Application

Passive cart transfer allows loose airborne particles to remain around the load before the clean-side door opens.Use the internal HEPA recirculation unit during a controlled closed-door dwell period to reduce the particle burden in the chamber air.

A filtered chamber may become ineffective when carts block the side returns.Size the clear width around the largest cart so both perforated return panels remain open and accessible for cleaning.

Available Options

Define chamber dimensions, control sequence, interlock, door windows and mounting frames. Plan filter access, replacement route, alarm contacts and the closed-door recirculation interval as part of the operating procedure.

Planning a Floor-Standing HEPA Pass Box 375 CFM specification?

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