VHS20-N02-BZ - 

This three port valve is used to release residual pressure on downstream side. Tabs on handle allow valve to be locked and tagged per OSHA requirements. For residual pressure release.
Features:

Large Knob (Utilizes an Oversized Knob for Simple Operation)

Key Hole for Locking-Out Knob (Attaching a Key or Tag, Locks Out Air Supply)

Manually Operated Valve Can Be Used to Prevent Accidents Caused By Residual Pressure in Pneumatic Lines (The Supply/Exhaust Status of the Air Flow Can Be Verified at a Glance in the Indicating Window — SUP: Supply; EXH: Exhaust

Can Prevent Accidents Due to Inadvertent Air Supply (When in the Exhaust Position, the Valve May Be Padlock Secured. (Prevents Accidental Start-Ups While Personnel are Cleaning or Servicing Equipment)

Can Be Attached to Other SMC F.R.L. Components