243 Service Regulators
These large capacity service regulators are designed and built
for commercial, industrial and gas distribution work. They are
right at home in such places as factories and foundries, district
regulator stations, commercial laundries and laundromats,
motels-hotels and apartments, bakeries, restaurants, schools,
churches and hospitals.
The versatile 243 is used for all kinds of gas fueled equipment
. . .boilers, burners, furnaces, ovens, heaters, kilns, engines, air
conditioners, etc.
Remarkable field versatility results from the union connection
between the fully interchangeable bodies and diaphragm-case
assemblies. They are easy to install, adjust, inspect and serv-
ice in all kinds of piping arrangements.
While used primarily for natural gas services, Model 243 regu-
lators perform equally well on LPG vapor, air, dry CO
2
, nitrogen
and other inert gas applications. Contact your representative
for special construction which may be available for certain cor-
rosive gases.
2
Basic Models
Outlet Pressure
Ranges and Springs
Pipe Sizes
243-12
Model Numbers
243-8
Model Numbers
Variation
243-12-1
243-12-2
243-12-4
243-12-6
Standard* Regulator
Regulator with Internal Relief Valve (IRV)
Regulator with Low Pressure Cut-Off (LPCO)
Regulator with both IRV and LPCO
High Pressure Regulator
Pressure Loaded Regulator
243-8-1
243-8-2
243-8-4
243-8-6
243-8HP
243-8PL
For additional information on IRV refer to page 5. For LPCO refer to page 6
*The term standard refers to non-IRV configurations.
Spring Color
243-12
243-8
Outlet Pressure Range
Spring Part Number
Red-Black
Blue-Black
Green-Black
Red
Blue
Green
Orange-Black
Orange
Black
Cadmium
Cadmium
Cadmium
White
t
---
---
---
3
1
⁄
2
” to 6
1
⁄
2
” w.c.
5” to 8
1
⁄
2
” w.c.
6” to 14” w.c.
10” to 18” w.c.
12” to 28” w.c.
1 to 2 psi
1
1
⁄
2
to 3 psi
1
1
⁄
2
to 3 psi
---
---
143-82-021-00
143-82-021-01
143-16-021-02
143-16-021-03
143-16-021-04
143-16-021-05
143-16-021-11
143-16-021-06
143-16-021-07
143-16-021-08
143-16-021-08
143-16-021-08
143-16-021-13
t
White is nested inside Cadmium *Model 243-8HP only
◆
◆
Model 243-8-2 (IRV) only.
Model
Pipe Size
243-12-1
and
243-12-2
243-8-1
and
243-8-2
243-8HP
1
1
⁄
4
”,
1
⁄
2
”
and 2”
1
1
⁄
4
”,1
1
⁄
2
”
and 2”
1
1
⁄
4
”,1
1
⁄
2
”
and 2”
Temperature Limits
The Model 243 Regulator may be used for flowing gas
temperatures from -20
o
F to 150
o
F.
Buried Service
The Model 243 Regulator is not recommended for buried service.
Copyright 2007, Sensus Metering Systems
3
1
⁄
2
” to 6
1
⁄
2
” w.c.
5” to 8
1
⁄
2
” w.c.
6” to 14” w.c.
---
---
12” to 28” w.c.
---
1 to 2 psi
2 to 4
1
⁄
2
psi
3 to 5 psi
◆
◆
3 to 6
1
⁄
2
psi*
6 to 10 psi*
