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Products>>Section A- RegO / ECII>>Regulators and accessories>>Page A-3
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Second Stage Regulator for 2 PSIG Systems
Designed to reduce first stage pressure of 10 PSIG down to 2 PSIG. Systems that utilize these regulators use smaller than normal piping inside of the building. A special final stage regulator, not the appliance regulator, is required to reduce intermediate 2 PSIG pressure down to 11" w.c.
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Part Number |
Inlet Connection |
Outlet Connection |
Factory Orifice Size |
Bonnet Delivery Pressure |
Vent Position |
Vapor Capacity BTU/hr. Propane* |
Order |
| LV4403Y4 | 1/2" F. NPT | 1/2" F. NPT | 1/4" | 2 PSIG @ 10 PSIG Inlet | Over Inlet | 1,000,000 | |
| LV4403Y46R | 1/2" F. NPT | 3/4" F. NPT | 1/4" | 1,000,000 | |||
| LV5503Y6 | 3/4" F. NPT | 3/4" F. NPT | 1/4" | 2,200,000 | |||
| LV5503Y8 | 3/4" F. NPT | 1" F. NPT | 9/32" | 2,200,000 |
*Maximum flow based on 10 PSIG inlet and 2 PSIG delivery pressure.
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LV4403Y Series |
LV5503Y Series |
Low Pressure Second Stage Tobacco Barn Regulator
Especially developed for drying barns in the tobacco industry. The 2503G regulator will supply a steady and constant flow of fuel to as many as 12 to 20 burners throughout the barn.
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Part Number |
Inlet Connection |
Outlet Connection |
Orifice Size |
Factory Delivery Pressure |
Adjustment Range |
Bonnet Vent Position |
Vapor Capacity BTU/hr. Propane* |
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| LV5503G4 |
1/2" F. NPT |
3/4" F. NPT |
1/4" |
15" w.c. at 15 PSIG Inlet |
8" to 18" w.c. |
Above Inlet |
1,750,000 |

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Compact Twin Stage Regulators - up to 525,000 BTU's/hr
This compact two-stage regulator is designed to reduce container pressure down to 11" w.c. delivery pressure. It is ideal for "on-site" cylinder applications, mobile homes and average domestic service including small ASME and 100 to 420 pound DOT cylinders.
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Part number |
Inlet Connection |
Outlet Connection |
Orifice Size |
Factory Delivery Pressure |
Adjustment Range |
Bonnet Vent Position 1st Stage |
Bonnet Vent Position 2nd Stage |
Vapor Capacity BTU/hr. Propane* | Accessories | |
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1st Stage Vent Pipe-away |
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| LV404B4 |
1/4" F. NPT |
1/2" F. NPT |
.219 |
11" w.c. at 100 PSIG Inlet |
9" to 13" w.c. |
Down |
Over Outlet |
525,000 |
404PE |
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| LV404B4V9 |
9 O'clock |
9 O'clock | ||||||||
| LV404B46 |
3/4" F. NPT |
Down |
Over Outlet | |||||||
| LV404B46V9 |
9 O'clock |
9 O'clock | ||||||||
| LV404B9 |
F. POL |
1/2" F. NPT |
Down |
Over Outlet | ||||||
| LV404B9V9 |
9 O'clock |
9 O'clock | ||||||||
| LV404B96 |
3/4" F. NPT |
Down |
Over Outlet | |||||||
| LV404B96V9 |
9 O'clock |
9 O'clock | ||||||||
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LV404B4 |
LV404B4V9 |
LV404B9 |
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* maximum flow based on 25 PSIG inlet pressure and 9" w.c. delivery pressure.
2 PSIG Delivery Pressure Twin Stage Regulator
Designed to reduce container pressure down to 2 PSIG. A line pressure regulator is required downstream to reduce the 2 PSIG to a nominal 11" W.C.
| Part number | Inlet Connection | Outlet Connection | Orifice Size | Factory Delivery Pressure | Adjustment Range (PSIG) | Bonnet Vent Position 1st Stage | 2 PSIG Bonnet Vent Position | Capacity BTU/hr. | Order |
| LV404Y9 | F. POL (CGA 510) | 1/2" F. NPT | .219 | 2 PSIG | 1.8 to 2.5 | Down | Outlet | 800,000 |

Products>>Section A- RegO / ECII>>Regulators and accessories>>Page A-3