APS Pass Box

The APS Pass Box is designed for controlled transfer of materials into and out of clean rooms without requiring the clean-room door to be opened. It helps reduce unnecessary personnel movement and supports contamination control between clean rooms and other classified areas.

The APS Pass Box incorporates HEPA-filtered air supply, electromagnetic door interlocking, automatic blower operation, UV-light interlocking, double-walled doors, and magnetic latching to support controlled material transfer.

✅ Key Features

• Controlled Material Transfer – Enables transfer of materials into and out of a clean room without opening the clean-room door.
• Contamination Control – Helps prevent contaminants from entering the clean room or moving between classified areas.
• HEPA Filtered Air Supply – Final supply filter provides 99.97% efficiency down to 0.3 micron.
• Fresh Air Filtration – Fresh air filter specified at 99.9% efficiency down to 20 micron.
• Controlled Air Velocity – Air velocity of 90–110 FPM at the filter face.
• Double-Walled Doors – Sandwiched doors with glass viewing windows and SS support frames.
• Electromagnetic Door Interlocking – Indicating lamps provided on both sides.
• Automatic Blower Operation – Fluorescent light and motor blower automatically operate when either door is opened.
• Automatic HEPA Air Activation – Clean air through the HEPA filter is automatically switched on when a door is opened.
• UV Light Interlocking – UV light is switched off if either door opens.
• Blower Failure Interlock – Door remains locked if the blower fails, according to the supplied specification.
• External UV Control – UV light can be switched ON/OFF using an external switch and remains OFF unless switched ON.
• Magnetic Latching – Both doors have magnetic latches designed to remain locked even after power failure.

Product Overview

The APS Pass Box provides a controlled interface between a clean room and adjacent areas for material transfer without opening the clean-room door.

By allowing materials to be transferred through a dedicated chamber, the system reduces the need for personnel to enter or exit the clean room solely for material movement.

The pass box is particularly suited to applications where maintaining controlled environmental conditions and reducing contaminant entry are important.

HEPA Filtered Air System

The pass box incorporates a final supply HEPA air filter with a specified filtration efficiency of:

99.97% down to 0.3 micron

The final filter casing is specified as a factory-extruded aluminium section.

Fresh Air Filter

The fresh air filter is specified with:

• Efficiency: 99.9%
• Particle size: Down to 20 micron
• Casing: Anodised aluminium

Controlled Air Velocity

The specified air velocity is:

90–110 FPM at the filter face

This provides the stated airflow performance at the filter face according to the supplied specification.

Automatic Blower & Air Operation

The pass box incorporates an automatic operating arrangement.

According to the supplied specification:

• The fluorescent light and motor blower unit automatically switch ON when either door is opened.
• Clean air through the HEPA filter automatically switches ON when any door is opened.
• The system includes an interlocking arrangement associated with blower operation and door locking.

The blower motor assembly is specified as a 0.1 HP, single-phase electric motor.

Door & Interlocking System

The pass box uses double-walled sandwiched doors equipped with:

• Glass viewing window
• SS support frame
• Handles
• Hinges
• Gaskets on both sides

Electromagnetic Door Interlock

An electromagnetic door interlocking system is provided with indicating lamps on both sides.

The interlocking system is intended to control simultaneous access through both doors.

Magnetic Latch

Both doors are provided with magnetic latches. The supplied specification states that the doors remain locked even after a power failure.

UV Light Safety Interlock

The pass box includes provision for UV light operation.

The supplied specification states that:

• UV light switches OFF if either door opens.
• UV operation can be controlled using an external ON/OFF switch.
• UV light remains permanently OFF unless it is intentionally switched ON.

This arrangement helps prevent UV light operation while a door is open.

Material of Construction

The specified material of construction is:

SS202 / SS304

The exact MOC should be confirmed for the selected configuration.

Available Models

Technical Specifications