Product Overview

01007/07 GB
replaces dp 01007/00
Differential by-pass valve
519 series
Function
The differential by-pass valve is used in systems working with
variable flow rates, for example in those making widespread use of
thermostatic valves or 2-way motorised valves. It ensures a flow
recirculation proportional to the number of valves being closed,
while limiting the maximum differential pressure value generated by
the pump.
In chilled water systems with high head pumps, installation of the
version with a setting range between 100 and 400 kPa is advisable.
Product range
Code 519500 Adjustable differential by-pass valve with graduated scale, setting range: 1–6 m w.g. Size 3/4”
Code 519700 Adjustable differential by-pass valve with graduated scale, setting range: 1–6 m w.g. Size 1 1/4”
Code 519504 Adjustable differential by-pass valve with graduated scale, setting range: 10–40 m w.g. Size 3/4”
CALE FFI
Technical specifications
Materials
Body: brass EN 12165 CW617N
Obturator: brass EN 12164 CW614N
Obturator gasket: EPDM
O-Ring seals: EPDM
Union seals: asbestos free NBR
Control knob: ABS
Spring: stainless steel
Performance
Medium: water, glycol solutions
Max percentage of glycol: 30%
Temperature range: 0–110°C
Maximum working pressure: 10 bar
Setting range:
10–60 kPa (1–6 m w.g.) for codes 519500 and 519700
100–400 kPa (10–40 m w.g.) for code 519504
Connections: 3/4”, 1 1/4” F x M with union
Dimensions
A
3/4”
1 1/4”
3/4”
B
59
88,5
59
C
26
41
26
D
104
158
104
D
A
B
mH
2
O
1
2
3
4
5
6
A
C
Code
519500
519700
519504
Weight (Kg)
0,45
1,19
0,45
R
E
G
I
S
T
E
R
E
D
BSI EN ISO 9001:2000
Cert. n° FM 21654
UNI EN ISO 9001:2000
Cert. n° 0003