Regulators - LP-Gas Equipment

1 Regulators The LP Gas Regulator - Workhorse of the Industry 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! Some Examples of Regulator Systems Single Stage 11 Single Stage Systems Pounds to Pounds Systems Regulator Single stage Regulators may only Pounds to pounds Regulators are used exten- be used on portable appliances sively on industrial burners such as torches, and outdoor cooking appliances.

2 Tar kettles and crop dryers. No fixed piping systems. Two Stage Systems Two stage Regulators are used where the storage is remote from Twin Stage Systems the load. Two stage offers superior, uniform pressure control. 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. Twin Stage 11 Regulator Second Stage 2 PSI. Regulator 2 PSIG Systems First Stage 10 PSI. 2 PSIG systems use three Regulator regulator stages which allows smaller, more compact piping in the building. Line Pressure 11 Regulator 1. Regulators Single Stage Regulators These compact Regulators are designed for smaller outdoor applications.

3 Single stage Regulators may not be installed in fixed piping systems per NFPA 58. Part BTU/HR* Inlet Outlet Outlet Number Capacity Connection Connection Pressure 302V 125,000 1/4 FNPT. 302V9LS 125,000 MPOL. 3/8 FNPT 11 LV2302A2 1/4 FNPT. 150,000. LV2302P MPOL. 302V9LS LV2302A2. * Propane capacity based on 25 PSIG inlet pressure and 9 delivery pressure. Twin Stage Regulators These compact Regulators are designed for small domestic applications. Models available with 11 or 2 PSIG discharge pressures. Part BTU/HR* Inlet Outlet Outlet Number Capacity Connection Connection Pressure LV404B34V9 450,000* 1/4 FNPT. 1/2 FNPT. LV404B39V9 450,000* FPOL.

4 11 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 LV404B39V9. and * Propane capacity based on 25 PSIG inlet pressure and 9 delivery pressure. ** Propane capacity based on 25 PSIG inlet pressure and PSIG delivery pressure. LV404Y9. LV404B34V9. Domestic First Stage Regulators 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. Part BTU/HR* Inlet Outlet Outlet Number Capacity Connection Connection Pressure LV3403TR 1,500,000 1/4 FNPT 10 PSIG. LV4403SR4 5 PSIG. 1/2 FNPT.

5 LV4403TR4 1/2 FNPT 10 PSIG. 2,500,000. LV4403SR9 5 PSIG. FPOL. LV4403TR9 10 PSIG. * Propane capacity based on inlet pressure 20 PSIG higher than the set pressure and delivery pressure 20% lower than the setting. LV4403TR9. LV3403TR. 2. Regulators Regulator Capacity Charts - Twin Stage & First Stage 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 EXAMPLE: DELIVERY PRESSURE.

6 Inches of Water Column 13 INITIAL SETTING The standard capacity for the LV4403TR9 regulator 150 PSI INLET. 12 is listed at 2,500,000 BTU/HR. At around -12 OF, the 100 PSI INLET. 11 tank pressure falls to approximately 15 PSIG. 10. 9 10 PSI INLET Under these conditions, the LV4403TR9 capacity 25 PSI INLET. 75 PSI INLET chart shows the delivery pressure dropping to approximately 8 PSIG with a flow of only 1,250,000. CFH/hr 30 60 90 120 150 180 210 240 270. BTU/hr 75,000 225,000 375,000 525,000 675,000 This capacity is 1/2 the standard capacity. FLOW PROPANE. Note: Under heavy load conditions, the temperature LV3403TR First Stage Regulator of the gas in the storage tank will be considerably less 12 than the ambient air temperature as the liquid boils to DELIVERY PRESSURE.

7 INITIAL SETTING keep up with the demand. This reduces the available 11. 150 PSIG INLET tank pressure even futher. PSIG. 100 PSIG INLET. 10. 50 PSIG INLET. 9 25 PSIG INLET. LOW TEMP =. CFH/hr 100 200 300 400 500 600 700 LOW TANK PRESSURE =. BTU/hr 250,000 500,000 750,000 1,000,000 1,250,000 1,500,000 1,750,000. LOW REGULATOR INLET PRESSURE. FLOW PROPANE. Vapor Pressure Of Propane LV4403TR9 First Stage Regulator DELIVERY PRESSURE. 150 PSI INLET. 12 INITIAL SETTING 125 PSI INLET. 11 100 PSI INLET Pressure Temperature 10 O. F PSIG. PSIG. 9. 8. 7 50 PSI INLET -40 15 PSI INLET. 25 PSI INLET. -30 -20 CFH/hr 100 200 300 400 500 600 700 800 900 1000 -10 BTU/hr 500,000 1,000,000 1,500,000 2,000,000 2,500,000 0 FLOW PROPANE 10 20 30 1584M, X1584M Regulator 40 50 60 DELIVERY PRESSURE.

8 INITIAL SETTING 50 PSIG INLET 70 14 100 PSIG INLET 80 150 PSIG INLET 90 10 100 PSIG. 6 110 120 2 10 PSIG INLET 25 PSIG INLET. CFH/hr 500 1000 1500 2000 2500 3000 3500. BTU/hr 1,250,000 3,750,000 6,250,000 7,750,000. FLOW PROPANE. 3. Regulators Domestic Low Pressure Second Stage Regulators Designed to reduce first stage pressure of 5 to 20 PSIG down to burner pressure, normally 11 Part BTU/HR* Inlet Outlet Outlet Number Capacity Connection Connection Pressure LV3403B4 450,000. LV4403B4 1/2 FNPT LV4403B66RA. LV4403B4VO** 1/2 FNPT. LV4403B46. 935,000. LV4403B46R**. LV4403B66 11 LV3403B4. LV4403B66R** 3/4 FNPT 3/4 FNPT. LV4403B66RA** 1,000,000.

9 LV5503B4 1/2 FNPT. 1,600,000. LV5503B6. 3/4 FNPT. LV5503B8 2,300,000 1 FNPT. * Propane capacity based on 10 PSIG inlet pressure and 9 delivery pressure. LV4403B46R. ** Vent located above outlet. ** Back Mount design. ** Right Angle design LV5503B4. LV4403B4. 2 PSIG Second Stage Regulators 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 Part BTU/HR* Inlet Outlet Outlet Number Capacity Connection Connection Pressure LV4403Y4 750,000 1/2 FNPT 1/2 FNPT. 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.

10 143-80HP 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 . LV4403Y4 2 PSIG. 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 . 143-80HP. 121-8 2 61,719,840 2 2 . 121-12 2 77,545,440 2 2 . * Propane capacity based on 10 PSIG inlet and 10% droop. ** Back Mount design. 243-8 2 . 4. Regulators Line Pressure Regulators For 2 PSIG Systems Designed to reduce 2 PSIG line pressure down to 11 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.