Pass Box Working Principle VIETPHAT

Pass Box Working Principle VIETPHAT

The working principle of a pass box in a cleanroom environment is designed to ensure the safe transfer of materials between areas of differing cleanliness levels while minimizing the risk of contamination. Below is a detailed explanation of the working principle tailored for VIETPHAT:

Working Principle of a Pass Box VIETPHAT

1. Isolation and Separation:

   • Objective: To separate cleanroom areas of different cleanliness levels.
   • Mechanism: The pass box serves as a buffer zone between two rooms, preventing direct airflow and cross-contamination.

2. Interlocking System:

   • Objective: To ensure that both doors of the pass box cannot be opened simultaneously.
   • Mechanism: An interlocking system (either mechanical or electronic) is used to lock one door when the other is open. This maintains the pressure differential between the two rooms and prevents contaminants from entering the cleaner area.

3. Material Transfer:

   • Objective: To transfer materials without compromising the cleanroom environment.
   • Mechanism:
     • Step 1: The operator places the materials inside the pass box from the less clean area.
     • Step 2: The door in the less clean area is closed and locked.
     • Step 3: The interlocking system then allows the door in the cleaner area to be unlocked.
     • Step 4: The operator in the cleaner area opens the door and retrieves the materials.

4. Airflow Control:

   • Objective: To maintain clean conditions inside the pass box during the transfer process.
   • Mechanism:
     • HEPA Filters: High-Efficiency Particulate Air (HEPA) filters are used to purify the air inside the pass box, ensuring that any particles are trapped and removed.
     • Positive or Negative Pressure: Depending on the cleanroom requirements, the pass box can be maintained at a slightly positive or negative pressure to prevent contaminants from flowing in or out.

5. UV Sterilization (Optional):

   • Objective: To sterilize the interior surfaces and materials inside the pass box.
   • Mechanism: Ultraviolet (UV) lights can be installed inside the pass box to sterilize the surfaces and materials. The UV light is typically activated automatically or manually before opening the door to the cleaner area.

6. Indicator Lights and Alarms:

   • Objective: To provide visual and audible cues about the status of the pass box doors and ensure proper operation.
   • Mechanism:
     • Indicator Lights: Red and green lights indicate whether the doors are locked or unlocked.
     • Alarms: Audible alarms may be used to alert operators if both doors are inadvertently opened or if there is a malfunction in the interlocking system.

Operational Steps

1. Loading:

   • Operator 1 places items into the pass box from Room A (less clean area).
   • The door on the Room A side is closed and locked.

2. Interlocking:

   • The interlocking mechanism ensures that the Room B door (cleaner area) remains locked until the Room A door is fully closed and locked.

3. Purging (if applicable):

   • If the pass box is equipped with HEPA filters or UV sterilization, the system will activate to purify the air and sterilize the interior.

4. Unloading:

   • Once the interlocking system confirms the Room A door is locked, the Room B door is unlocked.
   • Operator 2 opens the Room B door and retrieves the items.

5. Cycle Completion:

   • After retrieval, the Room B door is closed and locked.
   • The pass box is ready for the next transfer cycle.

Key Components

1. Body: Made of stainless steel to ensure durability and cleanliness.
2. Doors: Hermetically sealed with an interlocking system.
3. Filters: HEPA filters to maintain air purity.
4. UV Lights: For optional sterilization.
5. Control Panel: For operating interlocks and other features.
6. Indicator Lights and Alarms: For operational status and alerts.

Benefits

• Contamination Control: Prevents cross-contamination between different cleanroom areas.
• Efficiency: Allows for safe and efficient transfer of materials.
• Versatility: Can be customized with various features like UV sterilization and pressure control.

By adhering to these principles, VIETPHAT can ensure that their pass box effectively contributes to maintaining the integrity of their cleanroom environments.

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CÁC DÒNG SẢN PHẨM CÔNG TY CỔ PHẦN KỸ THUẬT VIỆT PHÁT ĐANG CUNG CẤP:
- Lọc cuộn: G1, G2, G3, G4, M5
- Lọc thô dạng tấm: G1, G2, G3, G4
- Lọc thô dạng túi: G1, G2, G3, G4
- Lọc tinh dạng tấm: M5, M6, F7, F8, F9
- Lọc tinh dạng túi: M5, M6, F7, F8, F9
- Lọc EPA: E10, E11
- Lọc HEPA/ULPA: H13, H14, U15, U16, U17
- Lọc phòng gió vào, gió ra phòng sơn
- Lọc chịu nhiệt độ cao: G1, G2, G3, G4, M5, M6, F7, F8, F9, E10, E11, H13, H14, U15, U16, U17
- Hộp chứa lọc: G1, G2, G3, G4, M5, M6, F7, F8, F9, E10, E11, H13, H14, U15, U16, U17
- Hộp kết nối AHU: G1, G2, G3, G4, M5, M6, F7, F8, F9, E10, E11, H13, H14, U15, U16, U17
- Hộp lọc khí FFU/Fan Filter Unit (FFU): H13, H14, U15, U16, U17
- Bộ hộp lọc chảy tầng cho phòng mỗ bệnh viện: H13, H14, U15, U16, U17
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