Installation of ball valve

• It is allowed to install the valve in any position and with any flow direction.
• The valve body should not bear bending, torsional, tensile, or compressive loads from connected pipelines. If necessary, supports or compensators should be provided to reduce the load on the valve from connected pipelines.
• The ball valve should not be used as a support for the pipeline.
• It is not allowed to use a pipe wrench for installing threaded ball valves, due to possible body deformation.
• When installing a brass valve with a two-piece threaded body, it should be turned with a wrench from the pipeline side. Otherwise, the valve body may become unscrewed.
• The edge of the pipe should not reach the end of the valve thread.
• The axis of the control handle (lever) must be parallel to the axis of the hole in the ball.
• Teflon tape, flax (tow), glue, or sealant can be used to seal the threaded connection.
• Leakage of the working medium (leakage) through the threaded connections and the stem is not allowed.
• It is not allowed to install cast iron ball valves on pipelines subjected to vibration.
• No welding work is allowed near the installed ball valve.
• After installation, hydraulic tests of the section must be carried out. The test pressure should not exceed the test pressure established for each of the tested elements. During hydraulic tests, ball valves, except for drainage and shut-off valves, must be in the fully open position.
• If mechanical impurities are possible in the water flow at the installation site of the ball valve, a mesh filter must be installed before the valve. Otherwise, abrasive wear of the ball may lead to a loss of sealing tightness.

Threaded Connection Packing Sequence

1. Take a strand of flax fiber with enough threads so that when twisted, its diameter is approximately equal to the depth of the thread. The length of the strand should provide a wrapping count 1.5 to 2 times more than the number of thread turns.

2. About 50-70 mm from the beginning of the strand, twist it slightly and place it in the first thread turn. Holding the strand with your hand, tightly wind the long strand clockwise, placing it in each thread turn.

3. When you reach the end of the thread, continue winding with a second layer, moving the turns toward the start of the thread. The length of the second layer should be approximately 2/3 of the thread length.

4. The remaining end of the strand (50-70 mm) should be wound similarly clockwise, from the end of the thread to its beginning.

5. Apply a layer of sealant to the surface of the wrapping.

6. Hand-tighten the connecting elements. If the packing is done correctly, the mounted element should tighten by 1.5 to 2 turns.

7. Using a wrench or torque wrench, continue tightening the element. If the mounted element needs to be positioned in a specific orientation, finish tightening in the desired position.

If the packing is done correctly, during tightening, the force should not exceed the tightening torque listed below:

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