Please do not block ads on our site. Clicks on ads help us exist, grow and become more useful for you!

Installation of a pressure differential regulator

Installation of a pressure differential regulator

Installation of a pressure differential regulator should be carried out in accordance with the installation instructions, in addition, the following recommendations should be taken into account:

  • Pressure gauges should be installed before and after the regulator.
  • A strainer should be installed before the pressure differential regulator, in the direction of water flow.
  • If installing the regulator on a pipeline transporting high-temperature water, an impulse cooler and a stem cooler may be required.
  • Different manufacturers provide different data, but on average, for the installation of a pressure differential regulator, it is recommended to maintain straight sections of 5DN before and 10DN after it.
  • For most pressure differential regulators, the installation position is horizontal with the membrane drive facing downwards at temperatures above 80°C, and arbitrary at temperatures below 80°C.

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:

DN15 DN20 DN25 DN32 DN40 DN50 DN65 DN80 DN100
70 Nm 95 Nm 120 Nm 150 Nm 190 Nm 230 Nm 280 Nm 350 Nm 400 Nm

Tightening torques for flange connections

DN Nut/Bolt Torque, Nm
15 - 32 М 10 15 - 30
40 - 65 М 12 35 - 50
80 - 100 М 16 75 - 100
125 - 150 М 16 80 - 120
200 М 20 150 - 200
250 - 400 М 24 340 - 410
500 М 27 340 - 410

question : comment : feedback

where to notify about the reply. not published anywhere


flow capacity

community of experts

We are gathering a community of experts in the design, installation, and service of heating, hot water, and water supply systems in United States. Join the community and you will receive emails with requests for work in United States from our visitors.

water supply
advertising on the website
1 391 visitors yesterday
visitors per month
14 255 from United States
43 860 from all countries