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POSITIVE BIAS RELAY / DIFFERENTIAL PRESSURE REGULATOR
Description
Signal-operated regulator designed to provide outlet pressure which is the sum of the input signal
pressure plus a preset bias. As an option, the relay can start with bias range -0.3 bar / -4 psi.
The relay can also be used as a differential pressure regulator.
Media
compressed air or non-corrosive gases
Supply pressure
max. 17 bar
Pilot pressure
max. 10 bar,
pilot port G
Accuracy
response sensitivity: < 1 mbar
Air consumption
without constant bleed
Relief capacity
110 l/min at 1.5 bar outlet and 0.35 bar overpressure above setpoint
Gauge port
G1/4 on both sides of the body, screw plugs supplied
Temperature range
0 °C to 90 °C / 32 °F to 194 °F, for appropriately conditioned compressed air down to -40 °C / -40 °F
Material
Body:
aluminium die-cast
Elastomer:
NBR/Buna-N
Inner valve: brass
Dimensions
Flow
A
B
C
rate
mm
mm
mm m
/h*
l/min*
³
1
1
Positive bias relay
68
170
16
72
900
68
170
16
78
900
68
170
16
78
900
Special options,
add the appropriate letter
negative bias
factory-set to -0.3 bar
NPT
connection thread
tamper-proof cap
above spindle, total height 174 mm
Accessories,
enclosed
pressure gauge
Ø 50 mm, 0...*
mounting bracket
made of steel
control
signal
Example 1: constant differential pressure of 1 bar
at high flow
A
˝
1/4
UNC x 1/2
B
signal
G
1
∕
4
gauge
G1/4
C
R650
*
1
at 7 bar supply pressure and 6 bar outlet pressure
*
2
01 = 0...1 bar, 02 = 0...2.5 bar, 04 = 0...4 bar, 10 = 0...10 bar
Gauges: see chapter for measuring devices
∕
1
4
Connection
Supply
Positive
thread
recommended bias
G
bar
bar
supply pressure max. 17 bar, relieving,
without constant bleed, transmission ratio 1:1
G1/4
5
0 ... 1
5
0 ... 2
8
0 ... 4
15
0 ... 10
G
3
∕
5
0 ... 1
8
5
0 ... 2
8
0 ... 4
15
0 ... 10
G1/2
5
0 ... 1
5
0 ... 2
8
0 ... 4
15
0 ... 10
2
bar, G
∕
1
4
differential
pressure
adjustment
+ 1 bar
Example 2: constant differential pressure of 1 bar
˝
18
45
Relieving function relieving
Mounting position any
Pressure
Order
Price
range
number
bar
R650
R650-02C
0 ... 10
R650-02D
R650-02E
R650-02F
0 ... 10
R650-03C
R650-03D
R650-03E
R650-03F
0 ... 10
R650-04C
R650-04D
R650-04E
R650-04F
R650-0 . .Y
+32,00
R650-0 . .N
+10,00
R650-0 . .T
+37,00
MA5002-..*
2
10,00
BW00-33
12,50
58
Ø9
BW00-33
G
∕
up to G1/2, 900 l/min
1
4
parallel translation
D
€
2
0
R650
0
signal
B
inlet
cross-section
R650
Product group
Order example:
R650-02C
R650
Booster
6
outlet
6.03
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