As a critical component in cleanroom environments, the control of the gap between the steel single-opening cleanroom door frame and door leaf is of paramount importance. It not only affects the cleanroom's sealing performance but also directly impacts the maintenance of indoor cleanliness, sound insulation, and the overall stability of equipment operation. Gap control requires comprehensive consideration from multiple aspects, including design, materials, installation process, commissioning and calibration, daily maintenance, and environmental adaptability.
Gap control of the steel single-opening cleanroom door is a core consideration from the design stage. Designers must accurately calculate the reasonable gap range between the door frame and door leaf based on the cleanroom's cleanliness level requirements. For example, high-level cleanrooms have extremely strict requirements for air leakage, requiring a smaller gap between the door leaf and frame to reduce the risk of dust, microorganisms, and other contaminants entering the room through the gap. Simultaneously, the design must also consider the door's opening flexibility, avoiding difficulties in opening the door due to excessively small gaps or the generation of particulate matter from friction with the door frame.
Material selection plays a fundamental role in gap control. The frame and door leaf of a steel single-opening clean room door are typically made of high-quality cold-rolled steel plate. This material is characterized by high strength, corrosion resistance, and resistance to deformation, effectively maintaining the shape stability of the frame and door leaf, thus ensuring that the gap will not widen due to material deformation during long-term use. Furthermore, the sealing material of the frame and door leaf is also crucial. Generally, silicone or EPDM rubber sealing strips with good elasticity, aging resistance, and excellent sealing performance are selected. These materials can tightly adhere to the contact surfaces of the frame and door leaf, filling tiny gaps and preventing airflow.
The installation process is a key aspect of gap control. Before installation, the construction personnel must accurately measure and position the door frame to ensure that the horizontal and vertical alignment of the frame meets design requirements. When fixing the door frame, special fasteners and expansion bolts must be used to firmly install the frame onto the wall, preventing deformation due to insecure installation, which would affect the gap size. During door leaf installation, the position and tightness of the hinges must be adjusted to ensure a uniform gap between the door leaf and the frame. For example, if the gap on one side of the door leaf is too large, the hinge on that side can be tightened appropriately to move the door leaf towards the door frame, reducing the gap.
The debugging and calibration process can further improve the accuracy of gap control. After installation, a comprehensive debugging of the steel single-opening clean room door is required to check whether the door leaf opens and closes smoothly and whether the gap between the door frame and the door leaf is uniform. If uneven gaps or excessive gaps in some areas are found,
professional tools should be used to fine-tune the hinges, sealing strips, etc., until the gap meets the design requirements. At the same time, the door's sealing performance should also be checked. This can be done by placing smoke inside the door or using professional testing equipment to observe for air leaks. If leaks are found, further gap adjustments or replacement of the sealing material are necessary.
Daily maintenance is equally important for maintaining gap stability. During use, the door frame and door leaf may undergo slight deformation due to frequent opening and closing or external impacts, leading to changes in the gap. Therefore, regular inspection and maintenance of the doors are necessary. Check for aging or detachment of the sealing strips and loose hinges. If any problems are found, replace the sealing strips or tighten the hinges promptly. Furthermore, keep the doors clean to prevent dust and debris from accumulating in the gap between the door frame and the door leaf, affecting sealing performance.
Environmental adaptability is also a crucial factor in gap control. Changes in temperature and humidity within the cleanroom can affect the materials of the steel single-opening cleanroom door, causing thermal expansion and contraction of the door frame or door leaf, thus altering the gap size. Therefore, the coefficient of thermal expansion of the materials must be considered during the design phase, allowing for appropriate expansion and contraction space. Simultaneously, during cleanroom operation, it is essential to maintain stable indoor temperature and humidity to minimize the impact of environmental changes on door gaps.
