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Description
Diaphragm vacuum regulator ensuring high precision in both vacuum and positive pressure range.
Media
compressed air or non-corrosive gases
Supply pressure
max. 17 bar
Accuracy
response sensitivity: < 2.5 mbar
Adjustment
by handwheel with locknut
Air consumption
without constant bleed
Flow rate
800 l/min*
Gauge port
G1/4 on both sides of the body, screw plugs supplied
Mounting position
any
Temperature range
-40 °C to 90 °C / -40 °F to 194 °F
Material
Body:
Elastomer: NBR/Buna-N
Dimensions
A
B
C
D
mm
mm
mm
mm
Vacuum pressure regulator
87
238
40
98
87
238
40
98
Special options,
NPT
connection thread
tamper-proof cap
made of aluminium, adjustment by screwdriver, total height 240 mm R251-0 . . T
FKM elastomer
Accessories,
enclosed
pressure gauge
Ø 63 mm, -1 ... 0 bar, G1/4
mounting bracket
made of steel
Vakuum
7
1
bypass regulation
to close
supply
pressure or
atmosphere
vacuum pump
Bypass regulation
1
Upstream installation is preferred when rapid
exhaust of a tank or system is required. That way the
vacuum pump acts directly upon the tank and is not
being throttled by the vacuum regulator.
*
1
for compressed air at -0.98 bar supply pressure and
*
2
for compressed air at
Gauges: see chapter for measuring devices
7.06
PRECISION VACUUM PRESSURE REGULATOR 800 L/MIN
in vacuum range,
1
aluminium die-cast
K
Flow
Connection
v
value
rate
thread
m
/h
m
/h*
l/min*
G
3
3
1
1
supply pressure max. 17 bar,
without constant bleed
2.5
48
800
G1/2
2.5
48
800
G3/4
add the appropriate letter
A
B
D
R251
Vacuum tank
Note
A strainer is provided on the pressure
side or atmospheric, an additional
filter is recommended.
0 bar outlet pressure
7 bar supply pressure and 1.4 bar outlet pressure
4200 l/min*
in positive pressure range
2
Inner valve: stainless steel and brass
Vacuum
Order
range
number
bar
R251
R251-04A
-1 ... +0.7
R251-04B
-1 ... +2.0
R251-04D
-1 ... + 10
R251-06A
-1 ... +0.7
-1 ... +2.0
R251-06B
-1 ... + 10
R251-06D
R251-0 . . N
R251-0 . . V
MA6302-00
BW00-47
39.5
27.5
Ø5.5
Ø5.5
gauge
G1/4
27
C
20
BW00-47
downstream regulation
vacuum pump
supply
pressure or
atmosphere
Downstream installation is prefered when rapid
2
2
exhaust of a tank or system or over-pressure filling is
required. The inlet pressure connection can optionally
be left open to atmosphere.
G1/2 and G3/4
vacuum ... 0.7/10 bar
Price
D
€
1.785,00
1.785,00
1.785,00
1.785,00
1.785,00
1.785,00
R251
+10,00
+37,00
+172,00
B
12,50
80,00
diaphragm
assembly
motor diaphragm
inlet
cross section
connection for downstream regulation
2
Vacuum tank
Product group
Order example:
R251-04A
R251
handwheel
spring
signal diaphragm
reliev valve
control diaphragm
connecting tube
outlet
aspirator tube
supply valve
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