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The revolutionary hand lever design features a 72 spline interlock mechanism allowing for 19 stopping positions every 5 degrees. Additionally, the hand lever material incorporates a UV inhibitor for enhanced performance in outdoor applications.

The BYV features reinforced lug holes and can be ordered with overmolded 316 stainless steel lugs for dead end service needs.
Unit of Measure


Valve Size

N/A 2 in

Body Material


Disc Material


Seal Material


Stem Material

N/A 316SS

Liner Material


Flow Coefficient (Cv)

N/A 125

Medium Temperature Range

N/A 70 ºF

Pressure Rating at 70°F

N/A 150 psi10 bar


N/A 4 lb1.8 kg

Method of Operation

N/A Lever

Sample Specification

N/A All thermoplastic wafer-style butterfly valves shall be manufactured from PVC Type 1, Grade 1 (ASTM D1784, Cell Classification 12454), CPVC(ASTM D1784, Cell Classification 23447) or glass filled Polypropylene (ASTM D4101, Cell Classification 85580). All valve bodies shall containintegral top mounting flange with dimensions and bolt circles conforming to ISO 5211. Bodies shall contain fully-supported flange bolt holes,be one piece construction and meet ANSI B16.10 narrow face-to-face dimensions in all sizes. If LUGGED butterfly valves are required, lugsshall be over-molded, 316 stainless steel and be the full width of the body. Liners shall be EPDM, Viton® or Nitrile. Liner shall be FULL BOOTdesign, and shall be retained in the body via rib and groove engagement. Liner shall serve as primary disc seal and face seals for mating flanges.Secondary upper bearing and lower seal retainer o-ring seals to be EPDM or FPM. Stem shall be 316 stainless steel, non-wetted and providefull engagement over length of disc. Stem shall have position retention design.

Lever handle shall be trigger-style with 360° interlocking splines allowing the handle to position the disc in 5° increments. Mounting of stopplate for lever handle shall be non-invasive to the valve body and shall not incorporate self tapping screws or other fasteners that connectdirectly to the valve body. Trigger shall contain hole for padlock, as well as slot for cable tie, to lockout valve. Lever handle material to be 30%glass filled Polypropylene with UV Inhibitor.

All sizes of butterfly valves (2" through 12") shall be pressure-rated for 150 PSI at 70°F non-shock.All butterfly valves shall carry a two-year warranty, and shall be manufactured by Hayward Flow Control products in the USA.

Typical Applications


  • Water and Wastewater Treatment
  • Aquatic and Animal Life Support Systems
  • Chemical Processing and Handling
  • Marine and Corrosive Environments
  • Mining
  • Metal Plating and Surface Finishing
  • Landfills / Environmental Infrastructure
  • Water / Theme Parks

Key Features, Benefits and Advantages


  • One Piece Body and Disc in PVC, CPVC and GFPP Materials
  • Revolutionary Hand Lever with 19 Lockable Stop Positions and 360° Interlock
  • External Disc Position and Flow Indication
  • Hydro-dynamic Centric Disc Design for Increased Flow Performance
  • Over-Sized Liner Face Maximizes Surface Contact with Flanges
  • EPDM, Viton® or Nitrile Liners
  • 1-Piece 316 Stainless Steel Stem with Threaded Retaining Gland
  • Stem Bearing and Seal Retainer for Absolute Stem Positioning and Sealing
  • ISO 5211 Top Flange and Stem Drive
  • All Sizes Meet ANSI B16.10 / ISO 5752 Narrow Face-to-Face Dimensions



  • Over-Molded or Field Mountable 316 Stainless Steel Lugs
  • Gear Operators
  • Complete Range of Pneumatic or Electric Actuators
  • Stem Extensions
  • 2" Square Operating Nut
  • Chain Operator for Gear Box



  • PVC per ASTM D1784 Cell Class 12454
  • CPVC per ASTM D1784 Cell Class 23447
  • GFPP per ASTM D4101 Cell Class 85580
  • EPDM, Viton® and Nitrile Liners