1

Regulators

The LP Gas regulator is called upon to deliver a very precise operating pressure to a load which can vary from pilot flow to wide open flow and at the same time compensate for extreme changes in tank supply pressure. In a properly sized propane system, this is accomplished consistently and automatically without user intervention or in most cases without user knowledge of the dynamics.

Amazing Indeed!

The LP Gas Regulator - Workhorse of the Industry

Some Examples of Regulator Systems

Single Stage Systems

Twin Stage Systems

Two Stage Systems

Pounds to Pounds SystemsSingle stage regulators may only be used on portable appliances and outdoor cooking appliances. No fixed piping systems.

Twin stage regulators incorporate the 1st stage and 2nd stage in one compact body. They are used for smaller systems with relatively short piping runs.

Two stage regulators are used where the storage is remote from the load. Two stage offers superior, uniform pressure control.

Pounds to pounds regulators are used exten-sively on industrial burners such as torches, tar kettles and crop dryers.

Line Pressure11” W.C. Regulator

Second Stage2 PSIRegulator

First Stage10 PSIRegulator

Twin Stage11” W.C.Regulator

Single Stage11” W.C.Regulator

2 PSIG Systems2 PSIG systems use three regulator stages which allows smaller, more compact piping in the building.

2

302V9LS

Regulators

LV404B34V9

LV404B39V9and

LV404Y9

LV3403TR LV4403TR9

* Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.

* Propane capacity based on inlet pressure 20 PSIG higher than the set pressure anddelivery pressure 20% lower than the setting.

LV2302A2

These compact regulators are designed for small domestic applications.Models available with 11” W.C. or 2 PSIG discharge pressures.

These regulators are used for first stage regulation in two-stage bulk tank systems.They reduce container pressure to an intermediate pressure of 5 to 10 PSIG.

* Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.** Propane capacity based on 25 PSIG inlet pressure and 1.5 PSIG delivery pressure.

These compact regulators are designed for smaller outdoor applications.Single stage regulators may not be installed in fixed piping systems per NFPA 58.

PartNumber

BTU/HR*Capacity

InletConnection

OutletConnection

OutletPressure

302V 125,000 1/4” FNPT

3/8” FNPT 11” W.C.302V9LS 125,000 MPOL

LV2302A2150,000

1/4” FNPT

LV2302P MPOL

Single Stage Regulators

Twin Stage Regulators

PartNumber

BTU/HR*Capacity

InletConnection

OutletConnection

OutletPressure

LV404B34V9 450,000* 1/4” FNPT1/2” FNPT

11” W.C.LV404B39V9 450,000* FPOL

LV404B46 525,000* 1/4” FNPT 3/4” FNPT

LV404B9V9 525,000* 1/4” FNPT 1/2” FNPT

LV404Y9 800,000** FPOL 1/2” FNPT 2 PSIG

Domestic First Stage Regulators

PartNumber

BTU/HR*Capacity

InletConnection

OutletConnection

OutletPressure

LV3403TR 1,500,000 1/4” FNPT

1/2” FNPT

10 PSIG

LV4403SR4

2,500,000

1/2” FNPT5 PSIG

LV4403TR4 10 PSIG

LV4403SR9FPOL

5 PSIG

LV4403TR9 10 PSIG

3

The capacity of any given regulator drops drastically at reduced inlet pressures. The standard capacities listed on page 2 are only intended as a comparative guide and should not be used for final regulator selection. Use the following flow charts with particular attention to the lowest expected temperature and associated tank pressure.

LV404B9V9 Twin Stage Regulator

LV4403TR9 First Stage Regulator

1584M, X1584M Regulator

LV3403TR First Stage Regulator

Vapor Pressure Of Propane

TemperatureOF

PressurePSIG

-40-30-20-100102030405060708090100110120

1.35.510.716.723.531.340.851.663.377.192.5109.3128.1149.3172.3197.3225.0

Regulators

EXAMPLE:The standard capacity for the LV4403TR9 regulator is listed at 2,500,000 BTU/HR. At around -12 OF, the tank pressure falls to approximately 15 PSIG.

Under these conditions, the LV4403TR9 capacity chart shows the delivery pressure dropping to approximately 8 PSIG with a flow of only 1,250,000. This capacity is 1/2 the standard capacity.

Note: Under heavy load conditions, the temperature of the gas in the storage tank will be considerably less than the ambient air temperature as the liquid boils to keep up with the demand. This reduces the available tank pressure even futher.

LOW TEMP =LOW TANK PRESSURE =LOW REGULATOR INLET PRESSURE

CFH/hrBTU/hr

100250,000

5001,250,000

DE

LIV

ER

Y P

RE

SSU

RE

PSIG

9

10

11

12

200500,000

300750,000

4001,000,000

6001,500,000

7001,750,000

INITIAL SETTING

150 PSIG INLET

100 PSIG INLET

50 PSIG INLET

25 PSIG INLET

FLOW PROPANE

DE

LIV

ER

Y P

RE

SSU

RE

PSIG

DE

LIV

ER

Y P

RE

SSU

RE

PSIG

CFH/hrBTU/hr

CFH/hrBTU/hr

100 200500,000

5001,250,000

300

1000

4001,000,000

15003,750,000

500

2000

6001,500,000

700 8002,000,000

25006,250,000

900

3000

10002,500,000

35007,750,000

FLOW PROPANE

FLOW PROPANE

150 PSI INLET125 PSI INLET100 PSI INLET

INITIAL SETTING

50 PSI INLET25 PSI INLET15 PSI INLET

7

2

8

6

910

10

1112

14

CFH/hrBTU/hr

3075,000

60

FLOW PROPANE

90225,000

120 150375,000

180 210525,000

240 270675,000

DE

LIV

ER

Y P

RE

SSU

RE

Inch

es o

f Wat

er C

olum

n

910111213 INITIAL SETTING

100 PSI INLET

150 PSI INLET

10 PSI INLET25 PSI INLET 75 PSI INLET

Regulator Capacity Charts - Twin Stage & First Stage

INITIAL SETTING

25 PSIG INLET

50 PSIG INLET100 PSIG INLET150 PSIG INLET

10 PSIG INLET

4

LV4403B4

LV3403B4

LV5503B4

* Propane capacity based on 10 PSIG inlet pressure and 9” W.C. delivery pressure.** Vent located above outlet.*** Back Mount design.**** Right Angle design

Designed to reduce first stage pressure of 5 to 20 PSIG down to burner pressure, normally 11” W.C.

LV4403B66RA

* Propane capacity based on 10 PSIG inlet and 10% droop.** Back Mount design.

LV4403Y4

243-8 2”

Designed to reduce first stage pressure of 10 PSIG down to 2 PSIG.A line pressure regulator is required downstream to reduce 2 PSIG to 11” W.C.

LV4403B46R

143-80HP

Regulators

Domestic Low Pressure Second Stage Regulators

PartNumber

BTU/HR*Capacity

InletConnection

OutletConnection

OutletPressure

LV3403B4 450,000

1/2” FNPT

1/2” FNPT

11” W.C.

LV4403B4

935,000

LV4403B4VO**

LV4403B46

3/4” FNPT

LV4403B46R***

LV4403B66

3/4 FNPTLV4403B66R***

LV4403B66RA**** 1,000,000

LV5503B41,600,000

1/2” FNPT

LV5503B63/4” FNPT

LV5503B8 2,300,000 1” FNPT

PartNumber

BTU/HR*Capacity

InletConnection

OutletConnection

OutletPressure

LV4403Y4 750,000 1/2” FNPT 1/2” FNPT

2 PSIG

LV4403Y46R** 750,000 1/2” FNPT 3/4” FNPT

LV5503Y6 1,210,000 3/4”FNPT 3/4”FNPT

LV5503Y8 1,210,000 3/4” FNPT 1” FNPT

143-80HP 1-1/4” 2,373,840 1-1/4” 1-1/4”

243-8 1-1/4” 3,165,120 1-1/4” 1-1/4”

243-8 1-1/2” 6,330,240 1-1/2” 1-1/2”

243-8 2” 6,330,000 2” 2”

243-12 1-1/2” 9,495,360 1-1/2” 1-1/2”

243-12 2” 11,077,920 2” 2”

121-8 2” 61,719,840 2” 2”

121-12 2” 77,545,440 2” 2”

2 PSIG Second Stage Regulators

5

Regulators

Line Pressure Regulators For 2 PSIG Systems

325-3

* Propane capacity based on 1 PSIG pressure drop across regulator.** Largest single appliance size for reasonable lockup and delivery pressure.

Designed to reduce 10 PSIG line pressure down to 11” W.C.Other spring ranges available for special applications.

Industrial Second Stage Regulators

* Propane capacity based on 10 PSIG inlet pressure and 11” W.C. delivery pressure.

243-12

143-80

243-8

121-12

PartNumber

BTU / HR*Capacity

InletConnection

OutletConnection

OutletPressure

143-80 3/4” 1,614,211 3/4” FNPT 3/4” FNPT

6 -14” W.C.

143-80 1” 1,899,072 1” FNPT 1” FNPT

143-80 1-1/4” 2,848,608 1-1/4” FNPT 1-1/4” FNPT

243-8 1-1/4” 4,589,424 1-1/4” FNPT 1-1/4” FNPT

243-8 1-1/2” 11,077,920 1-1/2” FNPT 1-1/2” FNPT

243-8 2” 11,077,920 2” FNPT 2” FNPT

243-12 1-1/2” 12,976,922 1-1/2” FNPT 1-1/2” FNPT

243-12 2” 20,573,280 2” FNPT 2” FNPT

121-12 2” 80,710,560 2” FNPT 2” FNPT

Designed to reduce 2 PSIG line pressure down to 11” W.C.1/2” & 3/4” sizes include a vent limiting device which allows them to be used indoors.1-1/4” size cannot be fitted with vent limiter.Regulator must be mounted in the horizontal position when using the vent limiting device.

PartNumber

BTU / HR*Overall Capacity

BTU / HR**Per Appliance

InletConnection

OutletConnection

OutletPressure

325-3 395,640 221,558 1/2” FNPT 1/2” FNPT 11” W.C.

325-5 870,408 474,760 3/4” FNPT 3/4” FNPT 11” W.C.

325-7 1,582,560 1,424,304 1-1/4” FNPT 1-1/4” FNPT 11” W.C.

6

X1580 Series** Propane capacity based on inlet pressure 20 PSIG higher and delivery pressure 20% lower than set pressure.

High Temp/High Pressure Pounds To Pounds RegulatorsX1580 series regulators have special construction for high temp LP Gas service such as crop drying, heat treating or asphalt mixing. Designed to reduce tank pressure down to between 3 and 125 PSIG. Ideal for a variety of pounds to pounds applications.

597 Series

High Pressure Pounds To Pounds Regulators

PartNumber

BTU / HR**Capacity

In & OutConnection

OutletPressure

597FA 500,000

1/4” FNPT

3 - 15 PSIG

597FB 820,000 10 - 25 PSIG

597FC 1,000,000 20 - 45 PSIG

597FD 1,250,000 40 - 100 PSIG

Designed to reduce tank pressure down to between 3 and 100 PSIG. Ideal for a variety of pounds to pounds applications.The 597 series is suitable for liquid or vapor service.

** Propane capacity based on inlet pressure 20 PSIG higher and delivery pressure 20% lower than set pressure.

A Word About High Pressure Regulators

Downstream Overpressure ProtectionUnlike their Domestic First Stage cousins, the High Pressure Pounds to Pounds regulators do not offer built-in overpressure protection for downstream equipment. These regulators normally operate with high inlet pressures and have relatively large orifice sizes. These regulators do not have built-in full capacity relief devices.

When installing High Pressure Pounds to Pounds regulators, care must be taken to protect downstream equip-ment from damage should the High Pressure regulator fail. If for instance a regulator seat should fail, uncon-trolled inlet pressure will be allowed into the downstream piping. An external pressure relief valve installed downstream from these regulators is often required for adequate system protection.

See Vapor Relief Valve Section

Regulators

PartNumber

BTU / HR**Capacity

In & OutConnection

OutletPressure

X1584MN 7,000,0001/2” NPT

3 - 30 PSIG

X1584ML 7,500,000 25 - 50 PSIG

X1586MN 11,000,0003/4” NPT

3 - 30 PSIG

X1586ML 12,000,000 25 - 50 PSIG

X1588MN 11,000,000 1” NPT 3 - 30 PSIG

7

Industrial First Stage Regulators

99-504

627/7710

630-78

Regulators

1580 Series

* Propane capacity. Rated capacites vary greatly with differing inlet pressures. The 15 PSIG values are offered for selection of the proper regulator in cold weather, reduced tank pressure situations.

PartNumber

BTU / HR*Capacity15 PSI In

BTU / HR*Capacity50 PSI In

In & OutConnection

OutletPressure

1584MN 3,500,000 7,000,000

1/2” FNPT

3 - 30 PSIG

1584ML ---- 7,500,000 25 - 50 PSIG

1584MH ---- 8,000,000 45 - 125 PSI

1586MN 7,500,000 11,000,000

3/4” FNPT

3 - 30 PSIG

1586ML ---- 12,000,000 25 - 50 PSIG

1586MH ---- 14,000,000 45 - 125 PSIG

1588MN 7,500,000 11,000,000

1” FNPT

3 - 30 PSIG

1588ML ---- 12,000,000 25 - 50 PSIG

1588MH ---- 14,000,000 45 - 125 PSIG

627/7710 5,222,448 17,560,086 1” FNPT 10 - 20 PSIG

630-78 9,495,360 25,320,960 2” FNPT 8 - 20 PSIG

99-513 7/8” or. 12,343,968 53,807,040 2” FNPT 5 - 15 PSIG

99-504 1-1/8” or. 20,573,280 90,205,920 2” FNPT 5-15 PSIG

Designed to reduce tank pressure down to between 5 and 20 PSIG. These regulators are used for the first cut from tank or vaporizer in multi million BTU applications. Other spring ranges and flow capacities available to meet specific needs.

These regulators do not provide overpressure protection for the downstream equipment. An external pressure relief valve installed downstream from these regulators is often required for adequate system protection.

See Vapor Relief Valves Section

8

Specialty RV Regulators

PartNumber

BTU / HR*Capacity

InletConnection

OutletConnection

OutletPressure

299-00 160,000 1/4” FNPT 3/8” FNPT 11” W.C.

254-00 130,000 1/4” Inv Flare 3/8” FNPT 11” W.C.

* Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.

299-00 254-00

Regulators

Automatic Changeover Regulators

* Includes pigtails and mounting bracket.** Propane capacity based on 25 PSIG inlet pressure and 9” W.C. delivery pressure.

7525B34 7525B4

PartNumber

BTU / HR**

Capacity

InletConnection

OutletConnection

ServiceIndicator

OutletPressure

7525B34 400,0001/4” Inverted

Flare 1/2” FNPT Integral 11” W.C.7525B4500,000

5755B4*

Designed to provide overpressure protection after high pressure regulators per requirements of NFPA 58.Proper selection of the relief device requires that the failure flow rate of the high pressure regulator be known.Other spring ranges and flow capacities available to meet specific needs.

Typical external relief installation

Vapor Relief Valves

PartNumber

SpringRange Size CFH Flow Propane

at 20 PSIGPipeawayAdapter

3139-18 18 PSIG (fixed) 1/4” MNPT 1357 3139-10 3/8” FNPT

289H-43 10 - 20 PSIG 1” FNPT 20,096 Use 1” pipe

3139-18

289H

Smaller, compact twin-stage and automatic changeover regulators mainly for RV applications.

Designed for two cylinder applications. Provides automatic changeover from “service” to “reserve” cylinder.

3139-10

9

Pigtails/Hogtails

Regulator Accessories

ConnectionsApproximate

Length

Part Number

1/4” Tube 3/8” Tube

7/8” HexShort Nipple

1 1/8” HexLong Nipple

7/8” HexShort Nipple

MPOL XMPOL

5” ---- ---- 913PS05

12” 912PS12 ---- 913PS12

20” 912PS20 912PA20 913PS20

30” 912PS30 ---- 913PS30

36” 912PS36 912PA36 913PS36

48” 912PS48 912PA48 913PS48

1/4” InvertedFlare

X MPOL

20” 912FS20 912FA20 ----

30” 912FS30 ---- ----

36” 912FS36 ---- ----

1/4” MNPTX MPOL

5” ---- ---- 913JS05

12” 912JS12 ---- 913JS12

20” 912JS20 ---- 913JS20

36” 912JS36 ---- ----

1/2” MNPTX MPOL 12” ---- ---- 913LS12

Regulator Brackets

2503-222302-31

2503-19

913PS12

912JS12

912FS20

912 Pigtails are 1/4” O.D. copper

913 Hogtails are 3/8” O.D. copper

Copper pigtails with brass connectors provide an effective method of connecting regulators to storage tank outlet valves.

Specially designed to mount RegO regulators where a bracket is required.

PartNumber Material For Use With Regulator

2302-31 Cadmium PlatedSteel

2302 Series / LV404B34 / LV3403B4 / LV3403TR

2503-22 LV404B9 Series, LV5503 SeriesLV4403 Series2503-19 Aluminum

10

Regulator Accessories

Regulator Vent Piping DO NOT USE THE RUBBER SUPPRESSOR FOR VENTS OVER 1/4”The vent line must be as large as the vent opening on the regulator.

The termination must be protected from the elements and insects.

For Indoor VentingUse the appropriate size standard pipe and terminate the run outdoors with a vent screen. Do not use PVC indoors.

For Outdoor VentingUse either the appropriate size pipe or the equivalent sizeUL651 SCH 40 Rigid PVC Conduit and terminate the run with a vent screen.

UL 651 SCH 40 Rigid PVC ConduitPipe and fittings are nonmetallic PVC. They are resistant to sunlight andare UL Listed for exposed or outdoor usage. Lightweight and easy cementjoint installation.

OutdoorsUse Steel Pipe or UL 651 PVC

IndoorsUse Steel Pipe and Fittings

Regulator vent discharge must be remote frombuilding openings, air intakes & ignition sources.

Regulators installed inside buildingsmust be vented to the outdoors.

Refer to NFPA 58 for Point of Discharge requirements.

4403-30Screen

Y602-9Screen

TERMINATE WITH A VENT SCREEN

3/4” NPT

Screen

Screen

Sample Electrical PVC Conduit

and Fittings (UL 651)

Purchase Locally

Remote Regulator Venting Examples

11

Multiple Cylinder Manifolds

PartNumber

InletConnections

OutletConnection

DiscCheck

1350EFPOL MPOL

No

1350R Yes

1450E 1/4” InvertedFlare 1/4” MNPT

No

1450R Yes1350E1450R

Pressure Test Equipment

Low Pressure Test Kit

2434A

High Pressure Gauge Adapter

2962

Low Pressure Manometer Kit

1212 KIT

Regulator Accessories

Leak Testing Made Simple♦ Permanantly installed access valve with automatic shutoff and dust cap eliminates breaking into the system.♦ Flexible hose with 90 degree knurled swivel adapter provides hand tight hookup even in tight quarters.♦ 15 PSI pressure gauge for accurate pressure test.♦ Bleed valve to reduce system pressure before testing.

APTK TEST KIT

ACCESSVALVE

190621/8” NPT

190631/4” NPT

Use with suitable pigtails to connect multiple cylinders together. Ideal for loads that require more than one cylinder to be in service at a time.

Access valves include caps with resilient seat for gas tight seal.

First Stage Regulatorwith Access Valve

For checking low pressure systems.Gauge has dual 35” w.c. & 20 oz. scales. Includes 3 ft. flexible hose with belled end

For checking high pressure sys-tems. MPOL X FPOL with 300# pressure gauge and bleeder.

For checking low pressure systems. 16” w.c. magnetic flex manometer, 3 ft. hose, green dye & tubing adapters.