EB 3131 EN
17
Design and principle of operation
the
V and acts in the diaphragm chambers B
and C which are connected to each other.
Type 47-1
To control the flow rate, the low pressure of
V downstream of the restriction (1.2) is
transmitted through a hole in the plug (3) to
the top diaphragm chamber A.
The high pressure of Δp is transmitted
through the attached control line (11) to the
diaphragm chamber B. To control the differ
-
ential pressure, the high pressure of Δp is
transmitted through the attached control line
(12) to the bottom diaphragm chamber D.
The low pressure of ∆p must be transmitted
through the external control line (14), which
is attached on the site of installation, to the
diaphragm chamber C.
When the Type 47-1 is used as a flow regu
-
lator and pressure reducer, diaphragm
chamber D is connected with the down-
stream pressure p
2
. The control line connec-
tion of diaphragm chamber C remains open
to the atmosphere.
˙
˙
3.2 Versions
Type 46-7 and Type 47-5 Flow and Differ-
ential Pressure Regulator
· Designed for the
installation in the low-pressure pipe, e.g. re-
turn flow pipe of a district heating station.
−
Type 46-7
· With adjustable flow rate
and differential pressure set point · With
internal overload protection (excess pres-
sure limiter) in the actuator
−
Type 47-5
· With fixed differential pres
-
sure set point · Adjustable flow rate set
point · With internal overload protection
(excess pressure limiter) in the actuator
Type 47-1 Flow and Differential Pressure or
Pressure Regulator
· Designed for installa
-
tion in the high-pressure pipe, e.g. flow
pipe.
−
Type 47-1
· With adjustable flow rate
and differential pressure or pressure set
point
3.1 Mounting parts
See Table 1.
Table 1:
Mounting parts
Valve size
DN 15
DN 20
DN 25
DN 32
DN 40
DN 50
Welding ends
1)
1400-6500
1400-6501
1400-6502
1400-6509
1400-6510
1400-6511
Threaded ends
1)
1400-6503
1400-6504
1400-6505
1400-6512
1400-6513
1400-6514
Gasket
8413-3000
8413-3001
8413-3002
8413-3003
8413-3004
8413-3005
1)
Pair including flat gasket
