By design, pneumatic controllers release methane gas into the atmosphere. This release of methane gas is commonly referred to as “methane bleed,” which is measured in cubic feet per hour. Controllers are classified as continuous bleed, meaning they constantly bleed methane gas, or they are classified as intermittent bleed, meaning they only bleed methane gas when in use.
Regardless of their classification, all controllers have a bleed rate and have been identified, by the Environmental Protection Agency, as one of the largest sources of methane emissions within the Natural gas and Petroleum industry. within the oil and natural gas industry.
Methane emissions reduction has become a focus area, within the natural gas and petroleum industry, and can be reduced with the Environmental Pneumatic Abatement System or EPAS .
Unlike retro-fit kits, that require removing the controller’s original manufacturer parts and potentially causing issues with performance , the EPAS is a non-intrusive, non-intrinsic methane emissions reduction system.
It adapts to the outside of the controller, the actuator of the control valve, and to the pressure regulator from the pipeline. The adaption process is simple and does not require removing original manufacturer’s components within the controller. The EPAS offers a safety feature, unlike retro-fit kits. If the EPAS should fail, the built in fail safe reroutes pressure directly to the controller and allows for normal controller performance.