Quick Answer
To choose the right regulator for a propane tank, consider the tank's capacity, the appliance's BTU requirements, and the desired pressure range. Look for a regulator with a sufficient pressure drop and flow rate to handle the system's demands. Check the regulator's compatibility with the tank's size and type.
Understanding Propane Tank Sizing
When selecting a regulator, it’s essential to understand the propane tank’s sizing. A 20-pound propane tank, for example, can hold 4.7 gallons of propane. This is equivalent to about 92,000 BTUs of energy. To determine the correct regulator, calculate the maximum BTU requirement of the appliances connected to the tank. For a small RV, this might be around 40,000 BTUs. A regulator with a flow rate of at least 0.5 SCFH (standard cubic feet per hour) should be sufficient for this application.
Choosing the Right Regulator Type
There are two main types of regulators: high-pressure regulators (HPRs) and low-pressure regulators (LPRs). HPRs are suitable for larger propane tanks and high-demand appliances, while LPRs are better suited for smaller tanks and lower-demand appliances. For a 20-pound tank, an HPR with a pressure drop of 10-20 PSI (pounds per square inch) would be a good choice. When selecting an HPR, look for a regulator with a maximum flow rate of at least 1.5 SCFH to ensure adequate pressure and flow during peak demand.
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