Maxitrol M511-66 Modulating Valve, 3/4" NPT

Used with Direct Fired (Negative Pressure) Burner applications. Used to increase in voltage corresponds to increase in outlet pressure.

Maxitrol M511-66 Features:

• 1/2" PSI Inlet Pressure
• Upstream pressure regulator settings used for inlet pressure operating limits
• Upstream pressure regulator is required
• 2.5 psi Maximum Emergency Exposure
• Low Fire: Adjustable Orifice Bypass
• High Fire: Upstream Pressure Regulator setting less pressure drop
• 7" w.c. max outlet pressure