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Laminar Flow Pass-Through Window
A laminar-flow pass-through window is a specialized transfer device designed for cleanrooms, used to transfer items between areas with different cleanliness levels or pressure environments. Its core functions are twofold: First, it serves as an airlock barrier, effectively isolating airflow between the two sides through differential pressure control, thereby preventing pressure leakage from the higher-grade cleanroom due to transfer operations. Second, it features a built-in vertical laminar-flow purification system that provides efficient air-blowing during item transfer, rapidly removing surface particulates and significantly reducing the risk of cross-contamination.
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Laminar Flow Pass-Through Window
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Product Introduction:
A laminar-flow pass-through window is a specialized transfer device designed for cleanrooms, used to transfer items between areas with different cleanliness levels or pressure environments. Its core functions are twofold: First, it serves as an airlock barrier, effectively isolating airflow between the two sides through differential pressure control, thereby preventing pressure leakage from high-level clean zones caused by transfer operations. Second, equipped with a built-in vertical laminar-flow purification system, it provides efficient air-blowing during item transfer, rapidly removing surface particles and significantly reducing the risk of cross-contamination.The equipment features a user-friendly design, with the blow-and-shower duration freely adjustable via a knob or touch panel. This allows it to meet the cleaning requirements of various items while also preventing excessive energy consumption. The cabinet is made of smooth, easy-to-clean stainless steel and incorporates a double-sealed door structure to ensure airtightness during operation. It is equipped with a high-efficiency filtration system and a real-time monitoring device that automatically alerts users when filtration performance declines, thereby guaranteeing continuous and stable purification results.
This equipment is widely applicable to environments with stringent cleanliness requirements, such as pharmaceutical laboratories, electronic dust-free workshops, and food packaging lines. It represents an ideal solution that balances the safe transfer of items with effective environmental control.
Basic performance requirements:
1. Cleanliness Control
The internal cleanliness strictly complies with ISO 14644-1 Class A standards (dynamic ≥ ISO Class 5), ensuring that particulate contamination of transferred items remains under control.2. Structural Design
It features a double-layer sealed shell structure (outer layer: 1.5 mm SUS304 stainless steel; inner layer: 1.2 mm SUS304 stainless steel). The four internal walls are designed with R10 rounded transitions, and the structure incorporates seamless welding technology. A 500 Pa air-tightness test has confirmed zero leakage.3. Laminar flow system
Configure a vertical unidirectional airflow system (top-supply, bottom-return configuration). The top is equipped with a high-efficiency, uniform-pressure air distribution system. The bottom return air grille is made of SUS304 perforated steel sheet (hole diameter φ3 ± 0.1 mm, opening rate ≥ 60%), featuring an integrated reinforced rib framework structure.4. Filtration System
Two-stage filtration configuration: primary filter (EN 779:2012 G4 class, filtration efficiency ≥90%); high-efficiency filter (EN 1822:2019 H14 class, MPPS efficiency ≥99.995%).5. Wind Speed Control
The air velocity at the outlet, after passing through a high-efficiency filter, is 0.36–0.54 m/s (compliant with ISO 14644-4 standards). Nine-point matrix-type wind speed measurement locations are arranged 150 mm below the flow distribution plate.6. Differential Pressure Monitoring
Equip with a high-precision digital display differential pressure gauge (measurement range: 0–500 Pa, accuracy: ±3 Pa) to enable real-time monitoring and early warning of filter resistance.7. Smart Control
Integrated control panel functionality:
- Fan start/stop control
- Independent switch for UV sterilization (wavelength 253.7 nm)
- Electronic access control interlock system (response time ≤ 0.5s)8. Maintenance Design
The bottom features a quick-opening maintenance hatch (dimensions ≥400×300mm) that allows for rapid removal and installation of the fan module, reflecting a user-friendly maintenance design.9. Noise Control
The overall machine operating noise is ≤65 dB(A) (tested according to GB/T 4214.1 standard), featuring a vibration-damping base and a sound-absorbing air duct design.10. Uniform air distribution
The return-air grille panel employs a SUS304 laser precision-hole machining process (hole diameter tolerance ±0.05 mm), combined with a secondary pressure-equalizing flow guide grid, to achieve an airflow uniformity deviation of ≤15%.
Main technical parameters: (Note: The specifications listed in the table are for customer reference only; non-standard sizes can be manufactured upon customer request.)Model External dimensions (mm) Workspace dimensions (mm) Filter size (mm) Wind speed (m/s) Cleanliness Level Noise (dB) Blowing and rinsing time (min) Power (kW) HKHJ-CLCDC 400 600*470*1000 400*400*400 230×180×90 0.45 ± 20% Grade A 65 Manually adjustable
0~9990.2 HKHJ-CLCDC 500 700×570×1100 500*500*500 330*280*90 0.3 HKHJ-CLCDC 600 800*670*1200 600*600*600 430*380*90 0.4 HKHJ-CLCDC 800 1000*870*1400 800*800*800 630*580*90 0.6
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