5/12
Kv values for various settings for the valve Fig. 221 version H (brass):
10. Causes of operating malfunctions and their elimination
When searching for the malfunctioning of the valve safety rules must be observed
Malfunction
Possible cause
Solution
No flow
Valve closed
Open the valve
Low flow
Valve not sufficiently open
Open the valve
Contaminated filter
Clean or replace the strainer
Clogged pipeline system
Check the pipe line
Difficult valve control
Dry stem
Oil the stem
Leakage on the stem
Damaged o-rings
Replace the o-rings
Leakage on the seat
Improper closing
Tighten the hand wheel without using
auxiliary tools
Damaged seat or disc
Replace the valve. Contact the supplier or
manufacturer
Too high pressure difference
Check that the valve is installed in
accordance with the flow direction
marked on the valve.
Medium contaminated with solid objects
Clean the valve. Install a strainer upstream.
11. Decommissioning
After decommissioning and dismantling the valves must not be disposed of with household waste. Valves are made of recyclable
materials. Deliver them to a recycling centre.
DN
15
20
25
32
40
50
Type
60
Body material
H
Wheel position
Valve flow Kv coefficient [m
3
/h]
0,5
1,00
2,71
2,48
4,52
5,13
7,07
1,0
1,27
3,55
3,35
6,50
7,76
9,67
1,5
1,43
3,88
3,91
7,72
9,32
11,37
2,0
1,60
4,12
4,35
8,58
10,62
12,98
2,5
1,76
4,33
4,80
9,44
12,01
14,57
3,0
2,00
4,53
5,40
10,31
13,74
16,29
3,5
2,22
4,75
6,17
11,09
15,18
18,26
4,0
2,34
4,94
6,80
12,32
16,53
20,34
K
sig
2,28
7,79
11,91
21
33,66
49,81
