Bellofram Air Regulators Type 51 Catalog Page

Air Regulators

Type 51

Pressure Regulator Series

Features

•Excellent regulation, stability

and repeatability

•Corrosion-resistant construction (no brass

components, Type 51FR and Type 51AFR)

•NACE Constructed (Type 51FRCT Corrosive Tec)

•Low droop

•Small package size

•Panel, bracket or pipe mounting

•Fluorocarbon pintle seat

(Type 51FR, Type 51AFR and Type 51FRCT)

•Auto drain option (Type 51AFR)

•Meets ATEX

II 2 G Dc T 6

(Non-electrical certification)

Description

The Bellofram Type 51 Precision Air Regulator
series offers a high-performance regulator in
a compact, low cost package. It operates in
output pressure ranges up to 100 PSIG / 6.9
BAR (120 PSIG / 8.3 BAR in T-51FR Corrosive
Tec), with a maximum supply pressure of 250
psi (17.3 BAR).

Materials of Construction for
Standard Type 51 Series Regulators

Diecast aluminum for the body and dripwell;
glass-reinforced thermoplastic polyester for the
bonnet; acetal resin for the internals; BUNA-N
for the diaphragm, gaskets and O-ring, fluoro­carbon for the pintle seat, and aluminum for the
drain valve (plated steel handle).

Materials of Construction for
Corrosive Tec Type 51FRCT

Aluminum alloy bonnet, body, and filter bowl,
316 stainless steel internals, Inconel alloy
range spring, nitrile diaphragm (fluorocarbon
optional), 316 stainless steel valve assembly,
and finished with an epoxy paint. All metallic
parts for this unit conform to NACE material
requirements #MR-01-75.

Materials of Construction for 51FRWT

Aluminum alloy bonnet, body, and filter bowl,
acetal resin, plated steel and aluminum inter­nals. Nitrile diaphragm and finished with an
vinyl paint.

T51 FRCT

T51 R

Type 51

Pressure Regulator Series

Type 51 Options

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5

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8

9

10

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From industry to industry, Marsh Bellofram’s Type 51 Series

of Regulators offer a low-cost, high performance option

for a wide range of applications.

•=optionisavailable
s=optionisstandard

Fluorocarbon Pintle • s s s
Non-Relieving •• • •

Knob
Sq. Head Adj. Screw

5 Micron Filter • • •

Epoxy Finish •• • s
Tapped Vent
Coalescing Filter
Mounting Bracket •• • •

Pressure Gauge •• • •
Tamper Resistant Cover

Panel Nut Mount ss s
Soft Relief Seat

Low Bleed •
Fluorocarbon Diaphragm •• • •

Type 51R Type 51FR Type 51AFR Type 51FRCT

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These regulators are available standard
(Type 51R) or as filter-regulators (Type 51FR
and Type 51FRCT) and are even available
with an automatic drain, for automated
flushing out of contaminants (Type 51 AFR).
These versatile regulators provide excellent
regulation for a wide range of applications,
including pneumatic instruments, control­lers, chucks, and actuators. They can be

s

through-panel mounted with the supplied
mounting nut, bracket-mounted with the
optional bracket or, due to their light weight,
mounted by their ports. The Corrosive Tec is

•

supplied with a tapped bonnet vent, to allow
for the capture of exhaust air.

800.727.5646 • www.marshbellofram.com

Type 51FR Filter

and Type 51AFR Auto Filter

0-30 PSIG (0-2.1 BAR)
0-60 PSIG (0-4.1 BAR)

0-100 PSIG (0-6.9 BAR)

0.45 PSIG (0.03 BAR)
output change

20 SCFM

(566 LPM)

0.1 SCFM
(2.8 LPM)

Aluminum, Plated Steel,

Acetal Resin, Buna-N / Polyester,

Music Wire, Fluorocarbon

Maximum Supply Pressure

Output Pressure Range

Supply Pressure Sensitivity @ 25
psig / 1.7 BAR change in supply

Sensitivity
Repeatability
Flow @ 100 psig (6.9 BAR)

Supply 20 psig (1.4 BAR) outlet
Exhaust Capacity @ 5 psig

(0.34 BAR) above setpoint
Temperature Range
Air Consumption
Port Size

Materials of Construction

Type 51R

250 PSIG (17.3 BAR) 250 PSIG (17.3 BAR) 250 PSIG (17.3 BAR) 250 PSIG (17.3 BAR)

0-30 PSIG (0-2.1 BAR)
0-60 PSIG (0-4.1 BAR)

0-100 PSIG (0-6.9 BAR)

0.20 PSIG (0.01 BAR)
output change

1" (2.5 cm) of water 1" (2.5 cm) of water 1" (2.5 cm) of water 1" (2.5 cm) of water

0.1 PSIG (0.01 BAR) 0.1 PSIG (0.01 BAR) 0.1 PSIG (0.01 BAR) 0.1 PSIG (0.01 BAR)

15 SCFM

(425 LPM)

0.1 SCFM
(2.8 LPM)

-0 to 125˚F (-18 to 52˚C) -0 to 125˚F (-18 to 52˚C) 0 to 180˚F (-18 to 82˚C) -40 to 185˚F (-40 to 85˚C)

6 SCFH (2.84 LPM) Maximum 6 SCFH (2.84 LPM) Maximum 6 SCFH (2.84 LPM) Maximum 6 SCFH (2.84 LPM) Maximum

1/4 NPT 1/4 NPT 1/4 NPT 1/4 NPT

Aluminum, Plated Steel,

Brass, Acetal Resin,

Buna-N /Polyester, Music Wire

Type 51R, 51FR, 51AFR and 51FRCT Dimensional Drawings

Type 51FRCT Corrosive Tec

0-30 PSIG (0-2.1 BAR)
0-60 PSIG (0-4.1 BAR)

0-120 PSIG (0-8.3 BAR)

0.45 PSIG (0.03 BAR)
output change

20 SCFM

(566 LPM)

0.1 SCFM
(2.8 LPM)

Aluminum, Stainless Steel, Inconel,

Buna-N / polyester, Fluorocarbon,

acetal, polyphenylene sulfide

Type 51FRWT

0-30 PSIG (0-2.1 BAR)
0-60 PSIG (0-4.1 BAR)

0-120 PSIG (0-8.3 BAR)

0.45 PSIG (0.03 BAR)
output change

20 SCFM

(566 LPM)

0.1 SCFM
(2.8 LPM)

Aluminum, Plated Steel,

Acetal Resin, Buna-N /Polyester,

Music Wire

Air Regulators

Type 51R

Mounting Bracket

For T-51FR, T-51AFR and T-51R
607-000-104

Type 51FR

www.marshbellofram.com • 800.727.5646

Type 51AFR

Type 51FRCT & Type 51FRWT

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