HVAC Butterfly Valves

3L Series Resilient Seated Butterfly Valves

Bray’s 3L Series Nylon 11 coated and Stainless Steel disc resilient seated butterfly valves are designed for maximum reliability and low torque for the most efficient automation possible.

NY/AB Series Resilient Seated Butterfly Valves

Specifically designed for automated applications on chilled water, hot water and condenser water, all NY and AB series automated butterfly valves are 100% factory tested for bubble-tight shutoff and low seating/unseating torque.

MK Series High Performance Butterfly Valves

Bray’s ANSI Class 150 and 300 high performance butterfly valves have proven, high-cycle reliability for applications in building automation, temperature controls and HVAC.

Bray Butterfly Valves for HVAC Applications

Bray is the largest butterfly valve manufacturer in the western hemisphere for a reason.  Bray’s in house design team and Bray owned ISO 9001 manufacturing facilities have over 30 years of experience with this product.  Our track record of reliability in thousands of installations over time bear this out.


Bray Commercial Division offers two distinct lines of butterfly valves for HVAC applications.  These low torque, high cycle life designs have emerged as the design standard in the commercial building market worldwide.

Comparative Valve Specifications

NYL Series MKL Series
Design Resilient Seated, Nylon Coated Disc Double Offset, Pressure assisted, but not pressure dependent seat design.  Stainless Steel Disc
Max Close-off Pressure 175 PSI ANSI 150- 285 PSI
ANSI 300- 740 PSI
Temperature Rating -20° F to 250°F -40° F to 500°F