Installation of a water pressure regulator

• The pressure regulator should be installed on a horizontal pipeline with the membrane chamber downwards, unless otherwise specified in the project or manufacturer's instructions.
• The pressure regulator should not be subjected to twisting, stretching or compression loads from connected pipelines.
• The flow direction should coincide with the direction of the arrow on the regulator valve.
• Different manufacturers provide different data, but on average when installing a pressure regulator, it is recommended to observe straight sections of 5DN before and 10DN after it.
• Manometers should be installed before and after the regulator.
• A mesh filter should be installed before the pressure regulator in the direction of the coolant flow.
• The connection of the impulse tube of the pressure regulator should be made through a valve for blowing and preventive maintenance, if not prohibited by the manufacturer's instructions.
• Some manufacturers recommend maintaining a distance of at least 5DN between the impulse sampling point and the regulating valve.
• For the installation of the regulator on a pipeline transporting water with high temperature, an impulse cooler and a stem cooler may be required.
• If the failure of the regulator can cause an emergency situation, a safety valve should be installed in the pressure maintenance area.

Sequence for packing a threaded connection

1. Take a flax fiber string with enough threads so that its twisted diameter is approximately equal to the depth of the thread. The length of the string should provide for 1.5-2 times more windings than the number of thread turns.

2. Starting approximately 50-70 mm from the beginning of the string, slightly twist it, place it in the first thread turn, and, holding it with your hand, tightly wind a long branch of the string clockwise, placing it in each thread turn.

3. When reaching the end of the thread, continue winding with a second layer, shifting the turns to the beginning of the thread. The length of the second layer winding should be approximately equal to 2/3 of the thread length.

4. Wind the remaining end of the string (50-70 mm) similarly clockwise, from the end of the thread to its beginning.

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

6. Tighten the connecting elements by hand. With correct packing, the assembled element should turn 1.5-2 full rotations.

7. Continue tightening the element with a wrench or a torque wrench. In case the assembled element needs to be in a specific position, complete tightening it in the necessary position of the element.

With proper packing, during tightening, the force should not exceed the tightening torque listed below:

Tightening torques for flange connections

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