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Differential Pressure Control Valve
Shut-off and Pre-regulation Valve
The differential pressure control valve keeps the difference in pressure found in two points of a plumbing circuit at a
constant level, according to the set value.
The balancing valve (shut-off and pre-regulation) regulates the thermal medium flow rate supplied to the part of the circuit
controlled by the differential pressure control valve.
Fluids: Water, glycol solutions (max. 50% glycol)
Temperature range: -5o
C~120o
C
Max. working pressure: 16 bar
Maximum pressure difference: 6 bar
Adjustable differential pressure range: 5-30 kpa
Pressure outlet connection: G1/4\"F
Capillarytube connection: G1/8\"F
Accuracy: ±15%
Technical data
Overview
Materials
Model Materials
Body Brass
Multi-function control knob PA
Spring SUS304
Spindle Brass
Connection cover Brass
Valve cone Brass
Model Materials
Diaphragm element EPDM
Bushing POM
Hand shank PA
Gauge Block ABS
Valve stem Brass
O-ring EPDM
Overall & Dimension
Overall & Dimension
Code DN A B C D
1FBD101 15 1/2\" 65 126 76
1FBD102 20 3/4\" 75 126 76
1FBD103 25 1\" 85 132 76
Code DN A B C
1FBE001 15 1/2\" 65 64
1FBE002 20 3/4\" 75 64
1FBE003 25 1\" 85 64
Differential pressure control valve
Shut-off and pre-regulation valve
B
D
A
C
B
A
C
1. The differential pressure control valve is suitable for
closed-loop circulation systems, where it automatically
maintains the differential pressure between two points in
the system.
2. The balancing valve (shut-off and pre-regulation) is
designed to adjust the flow rate of the thermal medium
supplied to the specific circuit segment under the control
of the differential pressure regulating valve.
3. By enabling the regulation of differential pressure
values to suit pre-specified design flow rates, the system
is protected against noise generation and excessive flow
velocity in variable flow rate operation modes.
4. The differential pressure control valve is applicable to a
variety of systems:
? Zone or riser systems;
? Condensing boiler systems;
? Combined heat and power systems;
? Variable flow rate systems equipped with two-way
thermostatic valves or analog control valves.
Multi-function handwheel enabling closing, adjusting, and
flushing operations without additional tools.
In the case that the space is limited and the water supply
and return stop valve is not allowed to be installed, the
pressure difference regulating valve has the function of
breaking and the function of restoring the set memory.
Subsequent to the completion of flow rate balancing, the
Memory mechanism can be engaged via the following
procedure: insert an Allen key into the designated
hole (A) on the balancing valve and turn the key fully
clockwise,without exerting excessive force.
The operation makes the valve set at maximum open
position. If required, the circuit may be shut off by rotating
the knob fully clockwise manually. Turn the knob fully
counterclockwise, and you can return the valve to the set
balancing position.
In this way, there is no need to set the differential pressure
value after the cut-off and maintenance system.
Multi-function control knob
Turn off and set value memory function
Operational Principle
Functions
Differential pressure
control valve
Shut-off and preregulation valve
FLOW
RETURN
Capillary
A
Connection Diagram
Installation
Hydraulic Characteristics
1. Install valve delivery pipe according to the flow direction shown on the body valve and connect it to the delivery pipe
with the capillary tube.
2. We recommend installing a shut-off valve both upstream and downstream, in addition to a filter to stop debris.
3. Valve can be installed in any direction (horizontally and/or vertically).
4. When starting the system, vent the air from the capillary tube. To carry out this operation, screw the capillary tube on
valve without tightening it completely.
Code DN Size
Δp SET POINT 5–30 kPa (50–300 mbar)
5 kPa 10 kPa 15 kPa 20 kPa 25 kPa 30 kPa
Qmin
m3
/h
Qmax
m3
/h
Qmin
m3
/h
Qmax
m3
/h
Qmin
m3
/h
Qmax
m3
/h
Qmin
m3
/h
Qmax
m3
/h
Qmin
m3
/h
Qmax
m3
/h
Qmin
m3
/h
Qmax
m3
/h
1FBD101 15 1/2\" 0.05 0.45 0.05 0.60 0.05 0.70 0.05 0.75 0.05 0.80 0.05 0.90
1FBD102 20 3/4\" 0.10 0.65 0.10 0.85 0.10 1.00 0.10 1.05 0.10 1.10 0.10 1.20
1FBD103 25 1\" 0.25 0.90 0.25 1.20 0.25 1.50 0.25 1.55 0.25 1.60 0.25 1.70
Q min. Q max. Flow rate
Q(m3
/h)
KVS Chart
3/4\"
Differential pressure control valve
Shut-off and pre-regulation valve
Specification Kvs (m3/h) DN
1/2\" 2.56 15
3/4\" 3.93 20
1\" 6.70 25
Specification Kvs (m3/h) DN
1/2\" 2.96 15
3/4\" 4.35 20
1\" 6.52 25
60
60
0.6
0.6
10
5
5
2.5
2.5
1
1
0.25 0.5
0.5
0.1
0.25
0.05
100
100
1
1
200
200
2
2
500
500
5
5
1000
1000
10
10
2000
2000
20
20
5000
5000
50
50
10000
10000
100
100
?P (mm w.g.)
?P (mm w.g.) 0.5 1 1.5 2 2.5 3 3.5
1/2\" 3/4\" 1\"
4
?P (kPa)
?P (kPa)
Q (m3
/h)
Q (m3
/h)
IDC Ningbo Tel: 86-574-27670666 Fax: 86-574-27670600
Email: idcnb@idcgroup.com.cn
IDC Beijing Tel: 86-10-51659550 Fax: 86-10-84799807
Email: idcbj@idcgroup.com.cn
