Uses thermistor sensing element in ventilation duct systems

Negative temperature coefficient (NTC) causes resistance to decrease as sampled air temperature increases

Requires no settings or calibration

Mounts on mounting bracket with four screws (not supplied)

Provides reliable back-up protection for temperature controlling thermostats

Provides reliable back-up protection for temperature controlling thermostats

Time Start Fan Control for Heat Assist

Time Delay Turns ON Blower as Function of Time and Temperature after Call for Heat

Turns Off Blower as a Function of Temperature at Dial Setting for Fan

Adjustable Furnace Temperature Limit to Match Existing Setting

Time Delay Turns on Blower as Function of Time and Temperature after Call for Heat

Turns OFF Blower as a Function of Temperature at Dial Setting for Fan

Adjustable Fan Off Setting

Adjustable Differential Setting

Adjustable Furnace Temperature Limit to Match Existing Setting

Close Firmly with Diaphragm that is Both Weight and Spring Loaded

Two Second Maximum Closing Time

Valve Closes on Power Failure, Recommended for Final Shut-Off Service

Set Opening Time with Various Sized Bleed Orifices or Adjustable Bleed Valve

Incorporate integral relief valves for added system protection

Large vent helps prevent blockage and has 3/4" FNPT thread for vent piping

Bonnet vent positioned over outlet to avoid icing and contamination by foreign material

Unique bonnet vent profile designed to minimize vent freeze over when properly installed

Replaceable valve orifice and valve seat disc

Straight line valve closure reduces wear on seat disc

Large molded diaphragm is extra sensitive to pressure changes

Built-in pressure tap has plugged 18" FNPT outlet

Plug can be removed with a 3/16" hex allen wrench

Extra long lever arm provides uniform delivery pressure

Large vent helps prevent blockage and has ¾" F.NPT for vent piping

With 15 PSIG inlet pressure, regulator is designed to not pass more than 2 PSIG with the seat disc removed

Incorporates integral relief valves

Replaceable valve orifice and valve seat disc

Straight line valve closure reduces wear on seat disc

Unique bonnet vent profile minimizes vent freeze over when properly installed

Large molded diaphragm is extra sensitive to pressure changes

Built-in pressure tap has plugged 18" FNPT outlet Plug can be removed with a 316" hex allen wrench

Internal relief valve available

Seven outlet pressure ranges