When encountering common problems with brass ball valves, here are some more detailed solutions:

1. Leakage Issues:

   • Check Valve Sealing Surface: Inspect for damage, wear, or corrosion on the sealing surface between the ball and the seat. If an issue is found, replace the sealing components.

   • Inspect Valve Connections: Ensure that the valve’s threaded connections are tight and undamaged. Use sealing tape or gaskets for proper sealing.

   • Check Ball and Seat: Examine the ball for damage or foreign objects obstructing the seat, causing leaks. If an issue is detected, repair the ball or clean the seat.

2. Inflexible Operation:

   • Inspect Valve Stem: Check for rust, damage, or blockages in the valve stem. If rust is present, use fine sandpaper or a wire brush to remove it and apply lubricant.

   • Check Ball and Seat: Verify if foreign objects are obstructing the ball, leading to inflexible operation. Clear any foreign objects from the ball and seat.

   • Inspect Operating Device: Check if the handle, handwheel, or actuator is damaged or loose. If issues are present, repair or replace the operating device.

3. Incomplete Pressure Relief:

   • Check Ball and Seat: Ensure a proper seal between the ball and seat. If there is damage or wear, repair or replace the components.

   • Inspect Valve Sealing Surface: Check for damage or wear on the valve sealing surface and replace the sealing components if necessary.

   • Verify Operating Device: Ensure the operating device is functioning properly to achieve complete valve closure.

4. Excessive Valve Noise:

   • Check Ball and Seat: Ensure a tight fit between the ball and seat. If there are gaps, repair or replace the ball and seat.

   • Inspect Operating Device: Verify the operating device is functioning correctly for smooth valve operation.

   • Install Noise Reduction Devices: Consider installing noise reduction devices such as silencers or pressure relief devices at the valve’s inlet and outlet to reduce noise.

5. Valve Fails to Fully Close:

   • Check Ball and Seat: Inspect the ball for damage or foreign objects obstructing the seat, and repair the ball or clear any obstructions.

   • Inspect Valve Stem: Check for rust, damage, or blockages in the valve stem, and clean or lubricate as needed.

   • Verify Operating Device: Ensure the operating device is functioning correctly to achieve full valve closure.

If the above methods do not resolve the issue, it is advisable to contact a professional valve maintenance or replacement service provider for further inspection and repair. Regular maintenance and care, such as lubricating the ball and stem, and cleaning the interior of the valve, can extend the life of brass ball valves and reduce the likelihood of malfunctions.