Product Overview | High Pressure Gas Regulators
Table A. Specific Gravity Correction Sp Gr Factor 0.4 1.22 0.6 1.00 1.0 0.774 1.5 0.632 2.0 0.547
7337A-4, 7337B-4 and 7337C-4 Regulators reduce high gas supply pressures to practical use levels. Since capacities will vary with the pressure drop across the regulator, due care must be exercised in properly sizing both the regulator and downstream piping. These regulators are pilot operated. Therefore they are an excellent choice when the application requires precise pressure control. SPECIFICATIONS
If the specific gravity of the gas is other than 0.6, divide desired flow by gravity factor to get equivalent flow of natural gas; then select regulator from Table C.
Multiply a given size regulator's natural gas capacity by gravity factor to get regulator capacity with different gas.
Body Sizes and End Connections: 2" NPT Maximum Operating Inlet Pressure: See Table B Capacities: See Table C
Maximum Emergency Inlet Pressure: See Table B Maximum Outlet (Casing) Pressure: 35 psig (2.4 bar) Maximum Operating Outlet Pressure to Avoid Internal Parts Damage - The Outlet Pressure Rating: 5 psig (0.34 bar) above outlet pressure setting Temperature Capabilities: -20° to 150°F (-29° to 66°C) Pressure Registration: An external, downstream control line is required
SELECTION
When selecting a regulator, specify its complete designation including pipe size code and spring designation or outlet pressure range. Example: Select a regulator for 15,000 scfh of 0.6 specific gravity natural gas from 20 psig supply pressure to 10 psig outlet pressure. Solution: Go to Table C. It is determined that a ¾" orifice will pass up to 16,000 scfh of flow. Then go to Table B and select a regulator with a ¾" orifice and the appropriate spring range, which leads to a selection of the 7337B-4-L3.
Bulletin 7337A/B/C-4 Page 2
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