Pressure drop (lockshields)
*valve fully open
4
0
1
0
0
1
0
0
0
1
0
0
0
1
0
0
1
0
1
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Kv values according to different openings
(lockshields)
LOCKSHIELD ADJUSTMENT SCREW: NR. TURNS
FLOW RATE (l/h)
Pressure drop
(lockshields)
0
1
0
0
1
0
0
0
1
0
0
0
1
0
0
1
0
1
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Kv values according to different openings
(lockshields)
LOCKSHIELD ADJUSTMENT SCREW: NR. TURNS
NOTE:
DEPENDING ON THE NUMBER OF TURNS THAT THE LOCKSHIELD ADJUSTMENT SCREW IS SET TO
Δ
P =
Δ
P ONE WAY +
Δ
P RETURN; TA: ALL OPEN.
THE ABOVE VALUES REFER TO WATER TEMPERATURE AT 15 °C.
CALCULATION METHODS
HOW TO CALCULATE THE
Δ
P PRESSURE DROP WITH A 200 l/h Q WATER DELIVERY CAPACITY DETERMINED BY THE VALVE AND STOP VALVE, WITH A 2,5
TURNS OPENING:
1° METHOD:
USE THE PRESSURE DROP DIAGRAM
Q = 200 l/h
Δ
P = 40 mbar
WHERE Kv STANDS FOR Q DELIVERY CAPACITY IN m
3
/h CORRESPONDING TO
Δ
P EQUALLING 1 bar:
Kv = Q /
√Δ
P
THE RELATIONSHIP BETWEEN
Δ
P (BAR) AND Q (m
3
/h) DELIVERY CAPACITY IS AS FOLLOWS:
Δ
P = Q
2
/ KV
2
2° METHOD:
USE THE Kv DIAGRAM
Kv
= 0,98
Q = 0,2 m
3
/h
Δ
P = 0,2
2
/ 0,98
2
= 0,04 bar
1. MANIFOLD SYSTEM
GB
GB
Δ
p
(mbar)
Δ
p
(mbar)
FLOW RATE (l/h)
0
2
,
0
4
,
0
6
,
0
8
,
0
1
2
,
1
5 TA
,
2
2
5
,
1
1
5
,
0
0
��
0
2
,
0
4
,
0
6
,
0
8
,
0
1
2
,
1
5 TA
,
2
2
5
,
1
1
5
,
0
0
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