1. When installing and debugging the cast steel gate valve, it should be carefully operated by professionals. The consequence of excessive opening stroke or excessive protection torque is that the stem or stem nut is stuck. The correct way is to set the opening position with the hand wheel, and protect it with torque. The general protection torque is controlled at 20% to 30%. If the closing stroke is too large, the result of excessive opening and closing torque is that the gate is wedged in the valve seat, and excessive opening and closing torque may cause the broken stem, the T-shaped groove of the gate to break, and the stem nut to be stuck.

2. It is recommended to increase the bypass device between the upstream and downstream of the important high-pressure large-diameter valve to reduce the opening and closing pressure difference, reduce the scratch on the sealing surface of the opening and closing moment, and reduce the electrical installation torque and reduce the manufacturing cost.

3. Pipe flushing should be thorough to avoid damage to the sealing surface caused by debris (such as iron filings, welding slag, electrode head, nuts, etc.) in the pipe.

4. It is recommended that the valve stem of the gate valve be installed vertically upwards. Tilting the installation will increase the probability of the gate being stuck. The horizontal mounting should have a mounting bracket to support the electrical installation and correct the valve stem during installation.

5. The middle cavity installation safety valve is an effective measure to control abnormal pressure rise, which can protect the valve opening and closing parts and maintain the safe operation of the system. In addition, it is an effective and feasible means to install an external bypass between the upstream side and the middle chamber or open the pressure relief hole on the upstream side of the ram.

Yongjia Aoguang Valve Co., Ltd. specializes in producing cast steel gate valves, power station gate valves, etc. The products have been widely used in various industries and fields, and have received consistent praise. Welcome more new and old customers to visit the Aoguang Valve website to see more. product information:

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