APPENDIX 7 COEFFICIENTS OF LOCAL RESISTANCE x IN HEATING SYSTEMS

System elements
heating

X value with diameters
conditional pass, mm

15

20

25

32

40

50

Tees on the aisle

one

one

one

one

one

one

Tees on the branch

1.5

1.5

1.5

1.5

1.5

1.5

Direct flow valves

3

3

3

2.5

2.5

2

Gate valves

-

-

0.5

0.5

0.5

0.5

Cranes through passage

four

2

2

2

-

-

Wide outlet

0.5

0.5

0.5

0.5

0.5

0.5

Two-column radiator

2

2

2

2

2

2