Bellofram Air Regulators Type 41-1, Air Regulators Type 41-2 Catalog Page
Air Regulators
Type 41-1 & Type 41-2
Pressure Regulator Series
Features
•Superior regulation characteristics
•Rugged, corrosion-resistant construction
•Excellent stability and repeatability
•Self-relieving of excess down stream pressure
•Low droop at high flow
•Mounting options available
Description
The Type 41 regulators are designed for applications requiring high flow capacity, low droop,
high accuracy, and fine adjustment sensitivity.
The use of Bellofram’s rolling diaphragm provides greater sensitivity and improved accuracy.
In addition, Type 41 regulators offer reduced
over-all size and several mounting options,
providing direct interchangeability with more
expensive competitors’ units.
Ruggedly designed and constructed, the Type
41 regulators have housings of precision-cast
aluminum. They are pressure tested, and
are chromate treated for internal corrosion
resistance. Every regulator is finished with vinyl
paint which resists scratching, weathering and
other physical abuse.
Careful design and quality materials throughout
assure long, trouble-free operation in the most
difficult industrial environments. A rubberized,
soft-seat valve stem provides stability and
“forgives” dirt and other foreign matter. An
aspirator maintains downstream pressure and
compensates for droop when high flow occurs.
The gauge port is convenient for gauge installation and can also be used as an additional full
flow outlet.
The design of these regulators is especially
well suited for panel applications due to ease of
mounting (only one panel hole required), small
size, adjustment sensitivity (32 threads per inch
on the adjusting screw), and knob.
Models
The Type 41 comes in two versions, Type 41-1
and Type 41-2. These two regulators offer the
same performance in two slightly different
packages.
Type 41-1
This unit comes standard with 1⁄4 NPT ports
and a knob, and can be panel mounted using
either the center nut or the threaded shoulder
holes, spaced 1.5 in. (38.1 mm) center-to-center.
Type 41-2
This unit comes standard with 1⁄4 NPT ports,
a knob and a bonnet vent port which can be
tapped for a 1⁄4 NPT fitting if desired. It can
be panel mounted using either the center nut
or the threaded shoulder holes, spaced 1.25 in.
(32.7 mm) center-to-center.
Type 41: Regulated Pressure VS. Flow
PSIG BAR
25 1.7
Type 41-1
Pressure Regulator Series
Type 41-2
Pressure Regulator Series
10
20 1.4
15 1.0
10 0.7
Regulated PRessuRe
5 0.3
0 0
SCFM 0 5 10 15 20 25 30
LPM 0 142 283 425 566 708 850
FoRwaRd Flow
800.727.5646 • www.marshbellofram.com
44.5
1.75 DIA
35.6
1.40
DIA
1/4–32 UNEF–3A
7/16–20 UNF–2A
1/4–18 NPT
IN & OUT PORTS
25.4
1.0
63.5
2.5
146.1
5.75
88.6
3.49
11/16 HEX PANEL
MOUNTING NUT
10–24 UNC–2B X .37
DEEP (2 PLACES)
4.8
0.19
10.2
0.4
38.1
1.5
1/4–18 NPT
GAUGE PORTS
9.4
0.37
63.5
2.5
IN
OUT
T41 Regulator Specifications
Sensitivity 1" Water Column (2.5 cm)
Flow Capacity @ 100 psig (6.9 BAR)
Supply and 20 psig (1.4 BAR) outlet
Effect of Supply Pressure Variation
(25 psig/1.7 BAR) on Outlet Pressure
Exhaust Capacity 5 psig (0.35 BAR)
above 20 psig set point
Max Supply Pressure 250 PSIG (17.2 BAR)
Effect of Changes in Flow on
Regulated Pressure
(100 psig / 6.9 BAR Supply)
Output Pressure Ranges
Temperature Range 0-160˚F (-18 to 71˚C)
Total Air Consumption
@ Maximum Output
Port Size 1/4 NPT, BSPT
Materials of Construction
Mounting Options Pipe, Panel or Bracket
25 SCFM (700 LPM)
±0.35 PSIG
(24 mBAR)
0.1–0.45 SCFM Typical 2.8 - 12.7 LPM
1 psig (0.07 BAR) over flow
of 10 SCFM (0-30 psig / 0-2.1 BAR
range, 1/4 NPT, 20 psig / 1.4 BAR set
point)
0-2 PSIG (0-0.14 BAR)
0-10 PSIG (0-0.69 BAR)
0-30 PSIG (0-2.1 BAR)
0-60 PSIG (0-4.1 BAR)
0-100 PSIG (0-6.9 BAR)
6 SCFH (2.8 LPM)
Body: Die cast aluminum with vinyl paint
Adjusting Screw: Plated steel
Trim: Plated steel, brass, acetal resin
Diaphragm: Buna-N polyester fabric
Knob: Phenolic Plastic
Spring: Music wire
Type 41-1 Dimensional Drawing
Air Regulators
Type 41-2 Dimensional Drawing
www.marshbellofram.com • 800.727.5646
Optional Mounting Bracket
607-000-057
11
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