RA-series regulators feature a 360 degree swiveling vacuum reference port that is double O-ring sealed. The maximum pressure is dependent on the relief valve inside the pump or the maximum current the fuel pump controller allows. With years of track and bench testing data, the RA-series regulators have been refined to optimize pressure management. A newly designed single stainless steel return orifice generates laminar flow that enhances stability control. Every detent permits 1psi (+/-0.5psi) of adjustment depending on current fuel pressure. To aid in adjusting pressure, there are incremental detents that provide haptic feedback to the user. With a simple turn of the knob, pressure will be increased or decreased. A jam nut and set screw are no longer required. RA-series regulators feature the first tool-less pressure adjustment. This product is NOT FOR USE on the low pressure side of mechanical fuel pumps. Base pressure is measured with the fuel pump running without a vacuum line connected to the regulator.Ģ. For dynamic fuel pressue outside this range, the vacuum/boost reference line will be required.ġ. The base pressure requirement for maximum damping efficiency is 40-105psi (2.8-7.2bar). The integrated 1:1 fuel pulse damper stabilizes fuel pressure created by the fuel pump, fuel injectors, regulator, etc. When installing a different NPT fitting, PTFE paste is required for proper sealing. An included preimpregnated PTFE plug can be used if this port is not needed. The Radium fuel pressure gauge is commonly used. The 1/8" NPT auxilary port can be used for monitoring fuel pressure, temperature, etc. When installing ORB fittings, first lubricate the O-rings with petroleum oil. Two -6AN and two -8AN male adapter fittings are included to suit most aftermarket fuel systems. The inlet (side) and outlet (bottom) feature large 10AN ORB (7/8"-14) threaded ports. The FPRD-RA can be mounted any direction including upside down. A laser cut anodized aluminum mounting plate is provided with 4 countersink M6x1mm bolts/nuts. This regulator features two M6x1mm threaded mounting holes. It is a fully functional high performance pressure regulator with a unique built-in fuel pulse damper. The Fuel Pressure Regulator Damper-Rotating Assembly (FPRD-RA) is the ultimate solution for consolidating critical fuel system components into a high-flow package.
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