Bellofram Air Regulators Type 70, Air Regulators Type 70BP Catalog Page
Type 70
Type 70BP
High Flow
Pressure Regulator
Features
•High flow capacity - Up to 80 SCFM
(2266 LPM)
•Responds quickly to minute changes
in downstream pressure
•Dampening action of aspirator tube
maintains downstream pressure
•Balanced supply valve minimizes the effect
of supply pressure changes
•Bellofram’s Buna-N and polyester rolling
diaphragms are designed to give millions
of cycles
•Honking and buzzing eliminated by action
of integral baffle and aspirator tube
•Stack up construction can be
disassembled and serviced without
removal from air line
Type 70 Description
The Type 70 Regulator is specifically
designed for applications that require
substantial flow capacity and accurate
pressure controls. Flows of 80 SCFM
(2250 LPM) can be attained.
Downstream pressure can be set
within 0.25 in. (6.3mm) of water
column and is accurately maintained
under varying flow conditions with the
help of an aspirator tube which adjusts
the air supply in accordance with the
flow velocity. A balanced supply valve,
utilizing a rolling diaphragm, makes
the regulator virtually immune to
changes in supply pressure.
The Type 70 has a
rugged precision
die cast aluminum
housing, and is pressure-tested and chromate-
treated for internal corrosion resistance.
The regulator housing is finished with vinyl
paint which resists scratching, weathering
and other physical abuse.
High Flow Back
Pressure Regulator
Air Regulators
Features
•High flow Capacity - Up to 50 SCFM
(1400 LPM)
•Responds quickly to minute changes in
upstream pressure
•Bellofram’s Buna-N and polyester rolling
diaphragms are designed to give
millions of cycles
•Stack up construction can be disassembled
and serviced without removal from air line
Type 70 & 70BP
Pressure Regulator Series
Type 70BP Description
The Type 70 Back Pressure
Regulator functions as a high
flow, high precision pneumatic
relief valve with an adjustable
setpoint. The Type 70BP can be
used in place of a standard relief
valve to improve pressure control
while maintaining protection
against over pressurization, as in
supply pressure lines to instruments and other control devices.
It is most often used in conjunction with a diaphragm-operated
valve and bleed orifice as a compressor controller. Excess compressor
pressure is relieved through the regulator to actuate the intake restricting
valve. When the regulator is shut off, downstream air escapes through
the bleed orifice, allowing the restricting valve to open.
www.marshbellofram.com • 800.727.5646
Contact Us About
NACE Compatible
T70 Regulator
"No Yellow Metals"
25
Air Regulators
Sensitivity
Flow Capacity
Effect of Supply Pressure variation
(25 psig) on Outlet Pressure
Exhaust Capacity (5 above psig 20 psig set point)
Maximum Supply Pressure
Effect of Changes in Flow on Regulated Pressure
(100 psig/6.9 BAR Supply)
Output Pressure Ranges (Type 70)
Set Point Ranges (Type 70BP)
Total Air Consumption @ Maximum Output
Temperature Range
Port Size
Materials of Construction
Size
Weight
Preset Pressure
Tamper Resistant Cover
Mounting
Type 70 Type 70BP
1/4" (6.4 mm) Water Column 1/8" (3.2 mm) Water Column
40 (1113 LPM)
50 (1416 LPM)
or 80 SCFM (2266 LPM)
< 0.025 PSIG (1.7 BAR) N/A
4 SCFM (113 LPM) N/A
250 PSIG (17.2 BAR) 250 PSIG (17.2 BAR)
2.5 PSIG (0.2 BAR) over flow 50 SCFM (1416 LPM)
(3/8 NPT, 0-30 PSIG / 0-2.1 BAR range,
15 PSIG / 1 BAR set point)
0-2 PSIG (0-0.1 BAR)
0-10 PSIG (0-0.7 BAR)
0-30 PSIG (0-2.1 BAR)
1-60 PSIG (0.1-4.1 BAR)
2-150 PSIG (0.1-10.3 BAR)
3-200 PSIG (0.2-13.8 BAR)
N/A
from 1.0 to 12.5 SCFH (0.5-6 LPM) N/A
-40˚ to 200˚F (-40˚ to 93˚C) -40˚ to 200˚F (-40˚to 93˚C)
1/4, 3/8, 1/2 NPT, BSPT 1/4, 3/8, 1/2 NPT, BSPT
Body: Diecast aluminum with vinyl paint
Adjusting Screw: Plated steel
Trim: Plated steel, brass, acetal resin
Diaphragm: Buna-N with polyester fabric
Knob: Phenolic plastic
Spring: Music wire
3.0" X 3.0" X 6.0" (76 X 76 X 152 mm) 3.0" X 3.0" X 6.0" (76 X 76 X 152 mm)
1.41 lb. (0.6 kg) 1.5 lb. (0.7 kg)
No No
Yes Yes
Pipe, panel, or bracket Pipe, panel, or bracket
50 SCFM (1416 LPM)
N/A
N/A
0-2 PSIG (0-0.1 BAR)
0-10 PSIG (0-0.7 BAR)
0-30 PSIG (0-2.1 BAR)
0-60 PSIG (0-4.1 BAR)
0-150 PSIG (0-10.3 BAR)
Body: Diecast aluminum with vinyl paint
Adjusting Screw: Plated steel
Trim: Acetal, brass, plated steel, nitrile
Diaphragm: Buna-N with polyester fabric
Knob: Phenolic plastic
Spring: Music wire
Type 70 and 70BP Dimensional Drawings
26
800.727.5646 • www.marshbellofram.com
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