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The Master Lock No. S3921 Butterfly Valve Lockout Device and S806CBL3 Adjustable locking cable locks out virtually any butterfly valve in just seconds with use of S806 adjustable locking cable. The easy-to-use wedge-shaped device features a stainless steel rivet allowing device to smoothly pivot open and closed to ensure proper fit and directional application arrows allow for ease of installation and minimize error. Made of durable, lightweight Zenex™ thermoplastic material, device is chemical resistant and performs effectively in extreme environments.

  • Adjustable Butterfly Valve Lockout
  • Includes one S806CBL3 adjustable lockout cable and one S3920 Butterfly Valve Lockout device
  • Locks out valve in seconds by feeding the S806CBL3 cable lockout device through desired eyelet and around valve
  • Both devices are made of durable, lightweight thermoplastic material that is chemical resistant and performs effectively in extreme environments
  • S3920 has an adjustable design that fits virtually all butterfly valves
  • Directional application arrows allow for ease of installation and minimize user error
  • Stainless steel rivet allows device to smoothly pivot open and closed to ensure proper fit