Balanced Zero Regulators feature a rugged, large diaphragm actuated valve assembly, sensitively balanced at near zero pressure. Gas flow is initiated by a very small pressure differential across the main diaphragm.

The Gas-Lok is a modification of the Zero Governor enabling its use as both a precision balanced regulator and operating shutoff valve.

BZR-B is designed with an adjustable compensation spring to bias the regulator providing a smooth transition to excess air operation at low fire. Using a gas adjuster downstream of a negative biased regulator, high fire can be set to stoichiometric conditions.

High ambient temperature areas or inaccessible mixer locations may require long pipe runs from the regulator to the mixers. Decreased capacity, delayed response, and adverse pressure losses
often result from these long pipe runs.

BZR-300 Series Balanced Zero Regulators are used for precise control of heated gases or for equipment locations subjected to high ambient temperatures. They are designed for continuous operation up to 300 °F.

BZR-500 Series Balanced Zero Regulators are used for precise control of heated gases or for equipment locations subjected to high ambient temperatures. They are designed for continuous operation up to 500 °F.

The BZR-700 is designed for flow ratio control of high-temperature vaporized fuels such as JP-series fuels, kerosene, and naphtha. It is rated for continuous duty service to temperatures of 700 °F.

BZR-B-300 is designed with an adjustable compensation spring to bias the regulator providing a smooth transition to excess air operation at low fire. Using a gas adjuster downstream of a negative biased regulator, high fire can be set to stoichiometric conditions.

Pyronics, Inc. Does not recommend field repairs of 5101-bzr regulators. It is extremely difficult to get the same setting in the field as opposed to a factory built or rebuilt unit. In addition, there is a possibility of the regulator being assembled in an improper manner which could create a hazardous condition.