CaptiveAire 043-B User Manual

THE GAS INDUSTRY

R-1307 R1

Sensus Metering Systems

Residential Service Regulators

Models 143-B and 043-B

Rugged and reliable 125 psig working

pressure regulators.

The Model 143-B and its compact companion 043-B are designed to deliver reliable

and safe regulation of natural gas, air, nitrogen, carbon dioxide, propane and other
non-corrosive gases for residential, light commercial and light industrial applications.
Outlet pressures between 3-1/2" w.c. and 2 psi are available. The operating temperature
range is –20°F to 150°F (-28.9°C to 65.5°C).

Both models are equipped with an internal relief valve with passages designed to
maximize the release of gas as quickly and efficiently as possible. The IRV is set to relieve
at 7" to 10" w.c. above normal
outlet pressure settings.

These regulators are also
equipped with an extra
large, removable, insect­proof, stainless steel
screened vent to resist
freeze-up and exclude
foreign matter. The
vent is threaded
3/4" or 1" NPT.

Made in USA

Residential Service Regulators

Model 143-B

Model 043-B

Construction

Valve Body – Cast Iron, 125 psig working pressure
Spring and Lower Case – Die-Cast Aluminum
Spring – 5 spring ranges, 3-1/2" w.c. – 2 psi
Orifice – Brass – 1/8", 3/16", 1/4", 5/16", 3/8", 7/16", 1/2"
Valve Seat – One-piece molded Buna-N
Fulcrum Pin – Brass
Throat/Support/Stem Guide – Cast Aluminum, integral to lower case
Diaphragm Plate – Plated Steel
Diaphragm – Polyester fabric reinforced Buna-N with integral relief seat and case flange seal

Model 143-B – 6" cut
Model 043-B – 4" molded, roll-out

Vent Valve – Precision-fit Polypropylene valve and seat
Adjustment Screw – ABS Cycolac
Closing Cap – ABS Cycolac with integral relief valve stop and a hole for tamper seal wire

Corrosion Protection

Each precision die-cast aluminum casing is treated inside and out and is dipped in
a chromate-base primer. This greatly inhibits the oxidation of metal surfaces that may
eventually compromise the integrity of the metal. A finish enamel topcoat further
protects the regulator. Valve bodies may be coated with yellow zinc chromate,
clear zinc, E-coat or hot dipped galvanizing.

High Tensile Strength Valve Bodies

The Model 143-B has a high tensile strength cast iron body that rotates 360 degrees.
The 043-B rotates in 90 degree increments. Available body sizes include:

■

Both Models – 3/4" x 3/4", 3/4" x 1", 1" x 1"

■

Model 143-B – 3/4" x 1-1/4", 1" x 1-1/4", 1-1/4" x 1-1/4"

■

Model 043-B – 3/8" x 3/8", 1/2" x 1/2"

Options

Regulator vent openings should face downward (6 o’clock) to minimize blockage from ice
and snow. If this is not possible, a plastic elbow vent with a protective screen is available
to screw into the vent. Other options:

■

2 psig Regulator

■

Seal Wires

■

Angle Body

805 Liberty Boulevard
DuBois, PA 15801
800-375-8875
Fax: [phone]

www.sensus.com
(open “North America Gas”)