WELDON A2040 Series Bypass Regulator

Part Number: A2040-281-A-120

BRAND NEW, U.S. MANUFACTURED, GENUINE WELDON A2040 Series Bypass Regulator (USCG Certified Marine Use)

  • Gasoline
  • E85, Methanol, Ethanol
  • Racing fuels

Size of Return Orifice: .281 in / 7.1 mm


  • Fastest response rate
  • Provides stable fuel delivery for the most demanding requirements
  • All Weldon Regulators maintain steady fuel delivery during dramatic changes in fuel demand, such as WOT conditions, boost application and gear changes
  • 4 different versions available to cover 4-200 psi
  • .281" bypass orifice
  • Hardened steel ball and replaceable steel seat
  • Fluorosilicone diaphragm
  • Compatible with most racing fuels including ethanol, and methanol.
  • 1/8" NPT Gauge Port
  • 1/8" NPT manifold pressure reference port
  • Fuel pressure increases on a 1:1 ratio with boost
  • Two -10 pressure ports
  • -8 return port
  • Replaceable / interchangable internal components
  • User serviceable
  • For use with all Weldon Pumps as well as pumps from other manufacturers
  • Mil-Spec clear anodized cover





More Information
Manufacturer WELDON
Part Number A2040-281-A-120
Year(s) 2016
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