Maxitrol 12A09 User Manual
325 Series Line Pressure Regulators with Over-Pressure Protection Devices
For Piping Systems up to 5 PSI
TABLE OF CONTENTS
Description .................................................................................. 1
Specications ........................................................................... 1, 2
Capacities ................................................................................... 2
Pressure Drop ............................................................................ 3
Spring Range Selection .............................................................. 3
Dimensions ................................................................................. 4
Sizing Instructions ...................................................................... 4
DESCRIPTION
325-3L47
325-3L48
325 Series pounds to inches regulators are for use on residential,
commercial, and industrial applications.
The 325 Series with OPDs features a high leverage valve linkage
assembly to deliver positive dead-end lock-up. The regulators are
capable of precise regulating control from full ow down to pilot
ow.
B Models: Imblue Technology™ increases corrosion resistance and
provides extra protection against the elements for regulators used
in outdoor applications.
NOTE: (B) in model number designates Imblue Technology™.
NOTICE
To comply with the ANSI standard Z21.80/CSA 6.22 for Line
Pressure Regulators, installations exceeding 2 psi nominal
require a tested and approved overpressure protection device
(OPD) for use with the regulator.
Line pressure regulators with separate
overpressure protection devices shall
be factory preassembled and supplied
to the eld as a unit.
Immediately after installation and prior to operating any appliance
it is important to check the preassembled pipe connection between
the regulator and the OPD for leakage. Even though the Maxitrol
5 psi line regulator w/OPD is shipped as an assembly, installation
of the assembly can result in turning (tightening or loosening) of
the preassembled connection. If gas leakage is detected, follow
the same procedures to stop the leak as you would use with any
eld pipe connection, and repeat step 3 according to Maxitrol
Safety Warning Instructions, LPROPD_MI_EN.FR.
SPECIFICATIONS
Gases
Suitable for natural, manufactured, mixed gases, liqueed
petroleum gases, and LP gas-air mixtures.
Approvals
CSA: ANSI Z21.80/CAN 6.22
Minimum Inlet Pressure
CSA Certied...............................................................1 psi (7 kPa)
325-5AL48
325-7AL210D
Figure 1: 325 Series Line Pressure Regulators with OPDs
325-5AL600
Maximum Inlet Pressure
Model CSA Certied
325-3(B)L47
325-3(B)L48
325-5A(B)L48
325-5A(B)L600
Natural/LP
5 psi (34.5 kPa)
325-7A(B)L210D
With 12A09, 12A39, and 12A49 Installed
Model CSA Certied
325-3(B)L47
325-3(B)L48
325-5A(B)L48
325-5A(B)L600
NAT: 5 psi (34.5 kPa)
LP: 2 psi (13.8 kPa)
325-7A(B)L210D
Outlet Pressure Range
Certied Spring ............................................................ 7 - 11” w.c.
Emergency Exposure Limits
All Models (Inlet Side Only) ................................ 65 psi (450 kPa)
Maximum Individual Load/Capacity
325-3(B)L47 (3/8”, 1/2”) (w/OPD 47 attached).....125,000 Btu/hr
325-3(B)L48 (1/2”) (w/OPD 48 attached)............. 200,000 Btu/hr
325-5A(B)L48 (1/2”) (w/OPD 48 attached).............235,000 Btu/hr
325-5A(B)L48 (3/4”) (w/OPD 48 attached).............320,000 Btu/hr
325-5A(B)L600 (3/4”) (w/OPD 600 attached)........425,000 Btu/hr
325-5A(B)L600 (1”) (w/OPD 48 attached).............465,000 Btu/hr
325-7A(B)L210D (1 1/2”, 1 1/4”) (w/OPD 210D attached) ...........
.............................................................................1,250,000 Btu/hr
Ambient Temperature Limits
All Models ..................................... -40ºF to 205ºF (-40ºC to 96ºC)
© 2011 Maxitrol Company, All Rights Reserved.
1
325 Series Line Pressure Regulators with OPDs
Mounting Position
The 325 Series is suitable for multi-poise
mounting, but when used with a vent
limiting device, the regulator must be
mounted in a horizontal upright position
(see Figure 2). Install the regulator
properly with gas owing as indicated by
the arrow on the casting. (See Maxitrol
Safety Warning Instructions, LPROPD_
MI_EN.FR.)
®
Vent Limiting Devices
12A09 (1/8” NPT)
®
Vent Protectors
12A39 (3/8” NPT)
UPRIGHT
Figure 2: 325 Regulator
in Upright Postion
12A49 (1/2” NPT)
®
Vent Limiting Devices for Indoor Applications:
325-3(B)L......................................................................12A09
325-5A(B)L..................................................................12A39
325-7A(B)L..................................................................12A49
OPD 48................................................................................12A09
OPD 600..............................................................................12A09
OPD 210D...........................................................................12A39
NOTICE
Maxitrol vent limiting devices eliminate the need to run vent
piping to the outside. Vent limiting devices are designed for
use indoors and in spaces where limiting the amount of gas
escapement due to diaphragm failure is critical. Vent limiting
devices should not be used outdoors if they are exposed
to the environment. Vent protectors are available for all
outdoor applications to ensure proper vent protection.
®
Vent Protectors for Outdoor Applications:
325-3(B)L......................................................................13A15
325-5A(B)L......................................................................13A15-5
325-7A(B)L.........................................................................13A25
OPD 48................................................................................13A15
OPD 600..............................................................................13A15
OPD 210D........................................................................13A15-5
13A15 (1/8” NPT)
Figure 3: Vent Accessories
13A25 (1/2” NPT)13A15-5 (3/8” NPT)
CAPACITIES - 0.64 sp gr gas expressed in CFH (m
Model Number
(pipe size)
325-3(B)L47 (3/8”, 1/2”)
325-3(B)L48 (1/2”)
325-5A(B)L48 (1/2”)
325-5A(B)L48 (3/4”)
325-5A(B)L600 (3/4”)
Outlet Pressure
Set Point
8.0” w.c. 110 110 110
11.0” w.c. 103 113 113
8.0” w.c. 184 184 184
11.0” w.c. 181 181 181
8.0” w.c. 229 229 229
11.0” w.c 213 220 220
8.0” w.c. 263 263 263
11.0” w.c. 237 254 254
8.0” w.c. 396 396 396
11.0” w.c. 326 355 355
3
/h)
Operating Inlet Pressure
3 psi (6.9 kPa) 4 psi (10.3 kPa) 5 psi (13.8 kPa)
325-5A(B)L600 (1”)
325-7A(B)L210D
(1 1/2”, 1 1/4”)
© 2011 Maxitrol Company, All Rights Reserved.
8.0” w.c. 413 441 441
11.0” w.c. 355 377 407
8.0” w.c. 1123 1123 1189
11.0” w.c. 1081 1107 1107
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