Cleanroom Installation Accessories

HEPA Filter Test Port

A room-side stainless bulkhead test port with a quick coupling, tethered cap and rear hose barb for controlled pressure or aerosol sampling at HEPA housings.

Room-Side Quick Connection
Tethered Metal Dust Cap
Threaded Bulkhead Mount
Barbed Tubing Interface

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Product Introduction

The HEPA filter test port combines a machined stainless quick-coupling socket with a two-hole face flange, threaded bulkhead, hex locknut and rear hose barb. Installed through a terminal housing or test-panel wall, it creates a defined connection between room-side test equipment and the intended pressure or aerosol line. The separate knurled cap remains attached by a short chain, protecting the exposed socket between validation activities without becoming a loose service item.

Key Features

The recessed quick-coupling socket provides a repeatable room-side connection for compatible test tubing and instruments.

A broad circular flange with two countersunk holes stabilizes the fitting against the housing face.

The rear male thread and hex locknut clamp the bulkhead securely through a prepared panel opening.

A stepped hose barb supports a direct transition to a correctly sized flexible sampling or injection line.

The knurled protective cap stays captured by a stainless chain during testing and servicing.

Customer Product Concerns

HEPA validation connections must remain accessible for instruments while preserving a secure, cleanable interface between test cycles.

Reaching an upstream plenum directly can require grille removal or awkward access above the cleanroom ceiling.The bulkhead fitting places a dedicated quick connection at the accessible room-side face.

An exposed socket can collect residue or become an unintended leakage path between test cycles.The close-fitting knurled cap protects the interface and remains captured by its short tether chain.

A poorly matched flexible tube can slip from the fitting or restrict the test flow path.The stepped rear barb is selected to suit the test-line bore and provides multiple retention lands.

A single-point fitting may rotate or leak where it passes through a thin housing wall.The two-hole flange resists rotation while the threaded bulkhead and locknut maintain controlled panel compression.

Typical Applications

Upstream aerosol concentration sampling at terminal HEPA housingsDownstream sampling circuits for exhaust-filter test fixturesStatic-pressure measurement at cleanroom filter plenumsChallenge-aerosol connection points in compatible validation arrangementsRoom-side access for ceiling and wall HEPA filter testing

Technical Parameters

Typical material and dimensional ranges for a stainless bulkhead HEPA filter test port are listed below.

Core Material	Machined 304 or optional 316L stainless-steel flange, coupling, bulkhead, locknut, hose barb and tethered cap
Panel Thickness	0.8-3.0 mm compatible HEPA housing or test-panel wall thickness
Effective Width	6-12 mm nominal test-line bore or compatible hose inside diameter
Maximum Length	Up to 120 mm overall bulkhead and hose-barb length
Steel Facing Thickness	2.0-5.0 mm nominal circular mounting-flange thickness
Core Density	Approximately 7900-8000 kg/m³ for austenitic stainless steel
Thermal Conductivity	Approximately 14-17 W/(m·K) for austenitic stainless steel
Surface Finish	Brushed, satin-machined or passivated natural stainless-steel finish
Joint Type	Two-hole face flange with thread-locked bulkhead, front quick coupling and rear barbed tube connection
Customization	Available based on the intended application and operating environment.

Available Options

304 or 316L stainless-steel constructionQuick-coupling and hose-barb sizes matched to test tubingEPDM or silicone flange gasketCustom two-hole flange pattern and bulkhead lengthStraight or elbow rear tube connection

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