Product Overview

ManualsBrandsMaxitrol ManualsHeating Supplies3/4" Lever Acting Design Gas Regulator w/ Positive Dead-End Lock-Up & Vent Limiter (325,000 BTU)

DRAFT 09.18.2013

Pipe Sizes ..................................... 3/8” to 2” threaded connections with NPT or ISO7-1 threads.

Housing Material ......................... 325-3, 325-5, 325-7A, 325-9: aluminum.

Mounting ..................................... Suitable for multi-positional mounting. If ball check vent limiting device is installed, mount

in an upright position only.

NOTE: All Maxitrol gas pressure regulators should be installed and operated in accordance

with Maxitrol Safety Warning Instructions (see GPR_MI_EN.ES or GPR_CSA_MI_EN.FR).

Certications ............................... 325-3, 325-5: ANSI Z21.18/CSA 6.3 Gas Appliance Pressure Regulators.

Gas Types ..................................... Suitable for natural, manufactured, mixed gases, liqueed petroleum gases, and LP gas-air

mixtures.

Maximum Inlet Pressure .............. CSA Certied: 325-3, 325-5: 2 psi (13.8 kPa), 5 psi (34.5 kPa)

Maxitrol Tested: 325-3, 325-5, 325-7A, 325-9: 10 psi (69 kPa)

With Vent Limiter 12A09, 12A39, or 12A49 Installed:

325-3, 325-5, 325-7A, 325-9: 5 psi (34.5 kPa) - Natural, 2 psi (13.8 kPa) - LP

Emergency Exposure Limits .......... 65 psi (450 kPa) (inlet side only)

Maximum Individual Load ........... Largest single appliance served by the regulator: 325-3: 100,000 Btu/h;

325-5: 325,000 Btu/h; 325-7A: 1,250,000 Btu/h, 325-9: 2,250,000 Btu/h

Capacity ......................................Total load of multiple appliances combined: 325-3: 150,000 Btu/h;

325-5: 325,000 Btu/h; 325-7A: 1,250,000 Btu/h; 325-9: 2,250,000 Btu/h

NOTE: Capacities are used to determine the maximum multiple appliance load. The

largest single appliance served by the regulator should not exceed the maximum

individual load specied above.

Ambient Temperature Ranges .......-40 to 205°F (-40 to 96°C)

Minimum Regulation .................... Suitable for pilot ow applications. (Circle P) (0.15 CFH NG), None (1.5 CFH NG).

Imblue Technology™ 325-3, 325-5, 325-7A, 325-9 models may be ordered with Imblue Technology™. Imblue

Technology™ increases corrosion resistance and provides extra protection against the

elements for regulators used in outdoor applications. Add sufx letter “B” to model number

when ordering.

Maxitrol’s 325 Series pounds to inches regulators are for use on

residential, commercial, and industrial applications.

The 325 Series features a high leverage valve linkage assembly

to deliver positive dead-end lockup. The regulators are capable

of precise control from full ow down to pilot ow.

325 SERIES

Lever Acting Design

325-3

Specications

Summary of content (4 pages)

PAGE 1
DRAFT 09.18.2013 325 SERIES Lever Acting Design Maxitrol’s 325 Series pounds to inches regulators are for use on residential, commercial, and industrial applications. The 325 Series features a high leverage valve linkage assembly to deliver positive dead-end lockup. The regulators are capable of precise control from full flow down to pilot flow. 325-3 Specifications Pipe Sizes...................................... 3/8” to 2” threaded connections with NPT or ISO7-1 threads. Housing Material...............
PAGE 2
DRAFT 09.18.2013 APPLIANCE REGULATORS ® Capacities: based on 1” w.c. pressure drop, from set point** C US UA.TR.012-13 Capacities expressed in CFH (m3/h) @ 0.64 sp gr gas Model Pipe Size 325-3 3/8” x 3/8” 1/2” x 1/2” 1/2” x 1/2” 3/4” x 3/4” 1” x 1” 325-5 325-7A 1 1/4” x 1 1/4” 1 1/2” x 1 1/2” 1 1/2” x 1 1/2” 2” x 2” 325-9 Operating Inlet Pressure Outlet Pressure Set Point CSA MAX CFH 4.0” w.c. (1.0 kPa) 150 (4.2) 160 (4.5) 190 (5.4) 7.0” w.c. (1.7 kPa) 150 (4.2) 120 (3.4) 10.0” w.c.
PAGE 3
DRAFT 09.18.2013 325 SERIES Lever Acting Design Dimensions Dimensions Model Pipe Size Vent Connection Swing Radius A B C 325-3 3/8”, 1/2” 1/8” NPT 3” (76 mm) 3.5” (89 mm) 4.2” (108 mm) 3.9” (98 mm) 325-5 1/2”, 3/4”, 1” 3/8” NPT 4.9” (124 mm) 5.3” (133 mm) 5.9” (149 mm) 5.4” (138 mm) 325-7A 1 1/4”, 1 1/2” 1/2” NPT 6.1” (156 mm) 7.3” (184 mm) 8” (203 mm) 7” (178 mm) 1 1/2”, 2” 1/2” NPT 7.8” (198 mm) 9.4” (239 mm) 10.8” (274 mm) 9.
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DRAFT 09.18.2013 APPLIANCE REGULATORS A A 325-7A 325-9 Lever Acting Design 1 Seal Cap 2 Stack 3 Top Housing 4 Rubber Valve 5 Valve Seat 6 Seal Cap Gasket 7 Adjusting Screw 8 Spring 4 9 Vent Connection 5 10 Diaphragm 11 Diaphragm Plates 12 Bottom Housing 1 2 6 7 8 9 3 10 11 12 NOTE: Diagrams are graphical representations only and may differ from actual product. © 2015 Maxitrol Company. All Rights Reserved.