Used in the air line, the top main diaphragm chamber is referenced through a bleed loader set for the desired burner mixture pressure. The bottom main diaphragm chamber is referenced downstream of the Flomixer or Flanged Mixing Tee. Mixture pressure and air-fuel ratio are held constant as burners are turned off. Available in sizes 3/4” through 3” NPT for 150°F service and 2 psig inlet pressures. Series 5261 is also available for 300°F service and 5 psig inlet pressures.

Capacity Table

AR Piping Diagram

Dimensions: 3/4″ – 3″ Sizes AR and AR-HP5


  1. Regulator must be perpendicular to pipe run in an upright position.
  2. Pipe run must be horizontal and level.
  3. All dimensions are in inches.

Ordering Information

  1. Select Model Number and Quantity.
  2. Shipping Instructions.