Here is the translation of the installation instructions for sanitary-grade stainless steel butterfly valves:
1. Preparation Before Installation
- Inspect the Valve: Ensure the butterfly valve is free from damage or defects, especially in the sealing parts. Verify the markings are correct and confirm the valve meets the operating conditions of the system (such as pressure, temperature, etc.).
- Clean the Pipeline: The inner surface of the pipeline must be clean and free of debris to prevent foreign particles from entering the valve and affecting its normal operation.
- Prepare Tools: Have the necessary installation tools ready, such as wrenches, screwdrivers, sealing materials, etc.
2. Installation Steps
- Determine the Flow Direction: Sanitary butterfly valves typically have flow direction markings. Install the valve according to these markings to ensure the media flow direction matches the design.
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Connection Method:
- Flange Connection: For flanged butterfly valves, align the two flanges with the valve's flange, and then secure them with bolts. It is recommended to tighten the bolts diagonally to ensure even pressure distribution across the flange.
- Quick Clamp Connection: If the valve uses quick clamps, ensure both ends of the pipeline are properly positioned, then clamp the valve using the quick clamps. Apply even pressure to avoid leaks caused by uneven clamping.
- Seal Inspection: After installation, ensure there are no leaks at the connections. You can test the system with water or air to ensure that when the valve is fully closed, there is no leakage.
3. Commissioning and Inspection
- Open/Close Testing: Before pressurizing the system, manually open and close the butterfly valve several times to check for smooth operation. Ensure the valve can be fully opened and closed smoothly.
- Leakage Test: Under normal working pressure, check if there is any leakage around the valve seals. It is recommended to perform a leak test after the valve is installed.
4. Maintenance Recommendations
- Regularly clean and maintain the valve, especially in systems handling sanitary-grade media, as keeping the valve clean is critical.
- Check for wear on the seals and replace them as necessary.
These are general steps for installing sanitary-grade stainless steel butterfly valves. For specific requirements or technical standards, please refer to the manufacturer's technical manual or consult a professional technician.