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CNG Regulator System

Parker Hannifin Corp. has introduced an advanced CNG Vehicle Gas Regulator System for medium- and heavy-duty vehicles. The regulator system consists of an integrated filter, inlet solenoid valve and heat exchanger, all working together to provide advanced fuel-handling performance. Optimized for 6- to 15-liter engines, Veriflo’s piston regulator design offers stable pressure delivery and control of CNG throughout the full range of engine and environmental operating conditions. The manifold design of the regulator system reduces the chance of fuel line pressure increase due to reduced volume of fuel between the solenoid valve and regulator seals.

The regulator system is designed to achieve the highest flow rates (165 lb/hr) in the industry and the lowest low-pressure operating parameter (225 psig), which increases the usable range of CNG vehicles by 10 to 15 percent.

Other key features and advantages include an integrated heat exchanger that uses heated radiator fluid to condition the gas before it enters the engine; well-dampened piston that reduces flow-induced vibration; reduced pressure drop at high flow (75 kg/hr CNG); constrained motion poppet design eliminates lateral loads and seat wear; thermal shielding of internal components with PTFE seals isolates gas flow, allowing continuous operation even in extreme ambients; sealed dome provides for captured vent and boost pressure biasing; and a compact size, offering maximum effectiveness in a small space.

Configuration options include a low-pressure relief valve, high- and low-pressure sensors, inlet solenoid valve and coalescing filter. The complete system meets or exceeds all industry specifications.

Kate Wade

Kate Wade is the managing editor of Utility Fleet Professional and Incident Prevention magazines. She has been employed by Utility Business Media Inc. since 2008.