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Installation of the range hood check valve
Preparations before installing the range hood check valve: Tools and materials are essential for a successful installation and should be prepared in advance:
- **Check valve body**: It is recommended to choose stainless steel or aluminum alloy materials, as they are heat-resistant and have a long lifespan.
- **Sealing materials**: High-temperature resistant aluminum foil tape (avoid regular tape) and neutral silicone sealant or glass glue.
- **Fixing tools**: Clips or expansion screws (clips are preferred to avoid gaps in the wall), screwdrivers, and tape measures.
- **Cleaning supplies**: Rags and dishwashing liquid for cleaning oil stains from the duct.
Detailed steps for installing the range hood check valve:
1. **Positioning and fixing**:
- Measure the diameter of the duct and select a check valve that matches it.
- Place the valve frame over the duct opening and mark the drilling points with a pencil (4–6 holes). After drilling, fix the expansion screws or clips in place.
- Ensure that there are no gaps between the frame and the wall, and that the arrow on the valve body points towards the inside of the duct. Installing it in the wrong direction will render it ineffective.
2. **Connecting and sealing**:
- Insert the valve disc assembly into the frame; a “click” sound indicates that it is securely in place.
- Wrap the joint with aluminum foil tape three times, then apply neutral silicone sealant (about 5 mm wide) to prevent the sealant from blocking the air inlet.
- Connect the range hood’s exhaust duct and secure it with a clamp. The duct should not be longer than 2 meters and should have as few bends as possible.
Common mistakes and how to avoid them when installing the range hood check valve:
- **Incorrect direction**: If the arrow does not point towards the inside of the duct, the valve will not open, allowing smoke to flow back.
- **Insufficient sealing**: Using only foam sealant or regular tape can cause it to crack when exposed to oil. Double-layer sealing with aluminum foil tape and silicone is necessary.
- **Improper location**: The check valve should be installed at the entrance of the secondary duct to prevent damage to the valve body caused by the pressure in the main duct.
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