Gas Regulators

Gas regulators take the pressure of your incoming gas to your building and step it down to an operating pressure for supply to the different types of equipment/appliances that a company may use. They are sized based on inlet pressure, outlet pressure, and required flow rate to operate the burner they feed. We offer brands from Maxitrol, Sensus, Siemens, Fisher, and more.

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Boiler Gas Regulators

What Are Gas Regulators & What Is Their Function?

Gas regulators maintain proper gas pressure

The gas coming in from the utility supply line is often at too high a pressure to allow the boiler to operate safely. Installing a gas regulator in the boiler’s gas train will make sure the pressure is stepped down to a usable level before it reaches the boiler’s furnace. 

Gas regulators preserve efficiency and safety

The gas flowing in from a utility has to be kept at high pressure because it has to supply other equipment in addition to the boiler. If the pressure doesn’t drop before it reaches the burner, it can cause a range of problems.

The Role Gas Regulators Play In A Boiler

If the incoming gas is at too high a pressure when it reaches the burner, it can cause damage to the burner itself, requiring recalibration or even replacement. High gas pressure will also increase the size of the flame itself, causing heat stress in the boiler tank that can lead to cracks, leaks, and explosions. Even if it doesn’t cause immediate or obvious damage, high gas pressure will still cause fuel consumption to go up, reducing efficiency.

What Are The Effects Of A Bad Gas Regulator?

If a gas regulator goes bad, the supply pressure to the burners will either become too high or too low. If the pressure is too high, it will affect efficiency, safety, and boiler integrity. If the pressure is too low, the burner may go out, or the boiler may not produce sufficient steam.

Things To Consider About Gas Regulators:

  • Gas regulators are rated for specific conditions, so be sure you always choose the right regulator for the job. 
  • They are sized based on inlet pressure, outlet pressure, and required flow rate.

Helpful Resources

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Technical Documents

Rental Contingency Plan

Formulas and Measurements

Gas Regulators FAQ

How does a gas regulator work?  

As the high-pressure gas comes in, it pushes against a diaphragm that is held in place by a spring. When enough pressure builds, the diaphragm overcomes the tension of the spring and creates a small opening through which a small amount of fuel can flow. 

How is the pressure adjusted in a gas regulator?

Gas regulators use a set screw or control knob to adjust the amount of spring tension holding the diaphragm in place. The lower the tension, the less pressure is required to move the diaphragm. 

How often should a gas regulator be replaced?

Because they use simple moving parts and physics, gas regulators tend to last a long time. However, the components begin to wear out even under ideal conditions. For safety’s sake, it’s best to have your regulator inspected regularly, and replaced at least once every ten years.