Butterfly Valve for Hot Air and Flue Gas BVHS with Safety Closing Function

The butterfly valves BVG, BVH, BVHM and BVHS adjust volumes of gas, cold and hot air, and flue gas on various appliances and flue gas lines. They are designed for control ratios up to 1:10, and with the mounted actuator IC 20 or IC 40 they are suitable for regulating flow rates for modulating or stage-controlled combustion processes.

The butterfly valve BVHS with safety closing function is used with the actuator IC 40 in systems where it is important that in the event of a main voltage failure, the valve closes preventing air streaming into the furnace without being under control.

Features

• For gas, air, hot air and flue gas
• Low leakage rate and pressure loss
• High control accuracy
• Can be mounted directly onto the actuators IC 20 or IC 40
• Suitable for intermittent operation
• Low-maintenance operation

	Documentation Manufacturer's Product Brochure Manufacturer's Operating Instructions Manufacturer's Technical Sheet
	Ordering Information Model Bore Diameter Max inlet pressure Connection Fitting Stop bar? Price (US List) Order Now BVHS 40TW01A 1½" 150 mbar (2.18 psig) between two ANSI flanges (1½") Yes $312 BVHS 50TW01A 2" 150 mbar (2.18 psig) between two ANSI flanges (2") Yes $344 BVHS 65TW01A 2½" 150 mbar (2.18 psig) between two ANSI flanges (2½") Yes $357 BVHS 80TW01A 3" 150 mbar (2.18 psig) between two ANSI flanges (3") Yes $426 BVHS 100TW01A 4" 150 mbar (2.18 psig) between two ANSI flanges (4") Yes $470 Accessories Model Description Price (US List) Order Now BV ACC 01 Heat deflectors /B $65
	Applications Click on images for close-up view. BVHS, safety closing function in the event of a mains voltage failure The safety closing function ensures that in the event of a mains voltage failure air cannot stream into the furnace without being under control. The BVHS is installed on the air side together with the actuator IC 40S. The butterfly valve with manual adjustment is used to adjust the high-fire rate.
	Specifications General Types of Gas: Air and flue gas Construction materials: Housing: GGG Valve disc: Stainless steel Drive shaft: Stainless steel Inlet pressure pe: max. 150 mbar (2.16 psi) Pressure differential between inlet pressure pe and outlet pressure pa: max. 150 mbar (2.16 psi) Medium temperature: -20 to 450 °C (-4 to +840 °F) Ambient temperature: -20 to +60 °C (-4 to +140 °F) Maintenance cycles: We recommend a function check once a year.