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Cleanroom Transfer

Finish: High-Satin (240 Grit)100% Traceable SS

Himalayan Steel Precision Series

Static Pass Box (Wall Mounted)

Designed for transferring equipment and materials between cleanrooms of identical environmental classification. Built with high-purity AISI 304 or 316 stainless steel with flush-mounted wall flanges, mechanical or electromagnetic interlocking, and clear tempered safety glass windows.

Available Metallurgies

SS 304SS 316SS 316L

Regulatory Compliance

cGMP Sanitary StandardsISO 9001:2015FDA 21 CFR Compliant

✓ Direct factory prices•✓ Material Test Certificate (MTC 3.1) included•✓ Pan-India Delivery

Engineering Overview & Fluid Dynamics

Active contamination barrier and laminar downflow principles

The Himalayan Steel Static Pass Box is an inert transfer hatch designed for moving materials between adjoining cleanrooms operating at equivalent air cleanliness ratings (e.g., ISO Class 7 to ISO Class 7 or ISO Class 8 to ISO Class 8). Because no internal airflow is required, it relies on airtight silicone gaskets, rigid double-skin wall construction, and a reliable interlocking mechanism (mechanical rotary cam or 12V DC magnetic latch) to prevent drafts, bypass airflow, and airlock pressure collapse during material staging.

Technical Engineering Specifications

Standard dimensional tolerances, electrical parameters, and air quality ratings

Chamber BodyHeavy-gauge 1.2 mm / 1.5 mm AISI 304 or 316L SS

Interlock TypeHeavy-duty mechanical cam interlock or 12V DC electromagnetic interlock

Door ConstructionDouble-wall insulated with continuous extruded hollow silicone seals

View Glass5 mm / 6 mm double-glazed flush toughened safety glass

SterilizationPhilips / Osram 15W UV-C germicidal lamp (254 nm wavelength)

Safety Cut-OffAutomatic microswitch cuts UV light instantly when either door opens

Wall Flanges4-sided perimeter trim flanges for 50 mm, 80 mm, or 100 mm cleanroom wall panels

Corner RadiusR10 / R15 radiused internal coved bends for sterile wipe-down

Standard Dimensional Matrix

Fabrication schedule comparison in Imperial and Metric standards

Custom dimensions available on request

Size (Feet)	Metric (MM)	Internal Chamber (W x D x H)	External Footprint (W x D x H)
1 x 1 x 1 ft	305 x 305 x 305 mm	305 x 305 x 305 mm	405 x 380 x 405 mm
1.5 x 1.5 x 1.5 ft	457 x 457 x 457 mm	457 x 457 x 457 mm	560 x 530 x 560 mm
2 x 2 x 2 ft (Standard)	610 x 610 x 610 mm	610 x 610 x 610 mm	710 x 680 x 710 mm
2 x 2 x 3 ft	610 x 610 x 915 mm	610 x 610 x 915 mm	710 x 680 x 1015 mm
2.5 x 2.5 x 2.5 ft	762 x 762 x 762 mm	762 x 762 x 762 mm	860 x 830 x 860 mm
3 x 3 x 3 ft	915 x 915 x 915 mm	915 x 915 x 915 mm	1015 x 980 x 1015 mm

Note:External dimensions include top motor plenum and side return ducting. Himalayan Steel Industries custom-tailors flange profiles to fit any wall panel thickness (50 mm, 80 mm, 100 mm).

Cleanroom Construction & Architectural Design

cGMP sanitary fabrication details from our Baddi engineering works

Monolithic Double-Skin SS Shell

Chamber outer and inner walls are pressed from heavy-duty AISI 304 or 316L stainless steel sheets, welded seamlessly with fully enclosed reinforcement ribbing for structural rigidity.

Precision Mechanical Cam Interlocking

Internal rotary steel linkage mechanically prevents both door handles from turning at the same time without relying on electrical power, ensuring zero downtime in power outages.

Flush Double-Glazed Glass Window

Twin sheets of shatterproof toughened safety glass are bonded flush with the door frame, eliminating dirt traps and allowing clear visual inspection into the chamber.

Airtight Silicone Gasketing

One-piece continuous extruded hollow silicone profile fitted in a dedicated perimeter channel provides an airtight seal against pressure differential leakages.

Cleanroom Wall Trim Flange

Precision 4-side stainless steel wrap-around flashing collar covers wall cutouts neatly with sanitary food-grade RTV silicone sealant joints.

Integrated UV-C Sterilization Assembly

Centrally mounted germicidal UV tube provides surface decontamination during idle intervals, with door safety switches to prevent operator exposure.

Standard Operating Protocol (cGMP SOP)

Standard operating guidelines and contamination control sequence

SOP REFERENCE GUIDE

Objective

To establish a safe, reproducible method for moving materials across cleanrooms of equal classification using the Himalayan Steel Static Pass Box.

Scope

Applies to all material transfers between equal-grade cleanroom corridors, preparation zones, and packaging suites.

Responsibility

Cleanroom Production Operators and Material Handlers.

Step-by-Step Material Transfer Sequence

Verify that both doors are closed and the UV germicidal light is active (or has completed its set sterilization cycle).

Open the dispatch-side door; note that the interlock mechanism automatically locks the receiving-side door handle.

Place the pre-cleaned materials carefully in the center of the pass box floor.

Close the dispatch door fully until the latch engages with a solid click.

Notify the receiving operator via intercom or through the view panel. Open the receiving-side door, remove the articles, and immediately close the door firmly.

Sanitize the base plate if transferring moist containers or chemical bottles.

Sanitization & Wipe-Down Protocol

Wipe internal surfaces daily using lint-free cloths soaked in filtered 70% IPA.
Clean both sides of the viewing glass with non-streaking cleanroom glass cleaner.
Check door silicone gaskets weekly for elasticity, wear, or tears.

Fail-Safe Interlock Protection

Mechanical or electrical interlocking guarantees single-door operation only.
Instant microswitch disconnects UV lamp whenever either door is opened.

Optional Engineering Customizations

Site-specific hardware adaptations

Electromagnetic 12V DC interlocking conversion with LED door status indicators
Digital UV-C exposure timer with automatic shut-off countdown
Stainless Steel 304 / 316 floor stand with adjustable leveling feet
Support roller conveyor internal bed for heavy container roll-through
Audio buzzer for door open timeout alert
Flange extension trim for thick RCC civil walls (up to 300 mm)

Quality Validation Package (DQ/IQ/OQ)

Audit-ready documentation for US FDA and EU-GMP inspections

Design Qualification (DQ) Drawing & Flange Cutout Layout
Installation Qualification (IQ) Protocol
Operational Qualification (OQ) Interlock Protocol
Material Test Certificate (EN 10204 Type 3.1) for Stainless Steel
Factory Acceptance Test (FAT) Report
UV-C Radiation Intensity Certificate

Cleanroom Design Highlights

Heavy-duty mechanical interlock mechanism engineered for over 100,000 maintenance-free operations
Airtight hollow tubular silicone sealing profile avoids cleanroom pressure gradient loss
Automatic safety microswitch shuts off UV-C irradiation immediately upon door opening to protect operator eyes
Flush wall trim profile installs seamlessly into cleanroom sandwich partitions or masonry walls

Target Pharmaceutical Applications

Transfer Between Cleanrooms of Equal Classification

Primary to Secondary Packaging Airlocks

Quality Control Analytical Sample Staging

Sterilization Preparation & Washing Rooms

General Pharmaceutical Formulation Corridors

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