A2040 Series, Bypass Regulator

Bypass Regulator USCG Certified for marine use!

Size of Return Orifice in Inches:


  • 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

    Compatible Weldon Pump Components

  • 1/8" Sintered Bronze Breather
  • 34706 6+ GPM Mechanical Fuel Pump

    Performance Product Charts
    Dimensional Drawings
    A2040-281-A-200 at $247.14 USD
    A2040-281-A-120 at $232.86 USD
    A2040-281-A-30 at $207.14 USD
    A2040-281-A-15 at $207.14 USD

    (Prices subject to change without notice)