User Guide

V46
Issue 9911
Catalogue Section 7
© 1999 Johnson Controls Inc.
Order No. PD-V46-E
4
Diagram for selecting the valve size corresponding with information on page 3
Note: Use dotted curves for high range 2" and 2½" valves
4
3
2
1
0
1234
1
2
3
4
5
6
7
8
9
B
C
Low range
High range
21/2"
21/2"
2"2"
Valve size
11/2"
11/4"
1"
3/ 4"
1/2"
3/8"
bar
1.50.50.250.1
3.5
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
10
60
50
40
30
20
3
m/h
2.5
1.5
0.5
Refr.headpressurerise(bar)abovevalve
opening point (scale B)
Water flow (scale A)
A
4,6
0.5
1
1. 5
2
2.5
3
3.5
4
Range 5 - 23 bar
(3/8", 1/2", 3/4")
Range 5 - 18 bar
Range 5 - 23 bar
(3/8", 1/2", 3/4")
Range 10 - 23 bar
(1", 1
1
/
4
")
Pressure drop across valve (scale C)
Note:
1 dm
3
/s = 3.6 m
3
/h = 15.8 U.S. gal./min. = 13.2 U.K. gal./min.
1 bar = 100 kPa = 0.1 MPa
≈
1.02 kp/cm
2
= 1.02 at
≈
14.5 psi.
Fig. 1