This is a manually operated pneumatic valve from Janatics' compact DS2 valve series. Here's what the sources show:
Type: 5/2 way hand lever detent valve, spool design
Port size: 1/4'
Actuation: Hand lever with detent (stays in position until manually switched — no spring return)
Pressure rating: Up to 10 kg/cm²
Temperature rating: Up to 80°C
Media: Compressed air
Features: Compact size, suitable for panel mounting, with mounting provision for individual unit
JANATICS HAND LEVER VALVE
JANATICS DS255HD61
JANATICS 5/2 X 1/4' HAND LEVER VALVE
JANATICS HAND TYPE VALVE
JANATICS MANUALLY VALVE
HAND LEVER VALVE
