https://www.reliavalve.com/swing-check-valve-with-damper.html
Swing Check Valve with Counterweight or Damper - Relia Valves
The swing check valves with counterweight or damper grant a good performance of the anti-hammer effect.
swing check valvecounterweightdampervalves
https://www.hypermotive.com/manley-oval-drag-chrome-silicone-double-w-damper-16pc-valve-springs-1-550-od-725-id-22431-16/
Manley Oval/Drag Chrome Silicone Double w/ Damper 16pc Valve Springs 1.550 OD/.725 ID - 22431-16 -...
https://valvesolutions.com/product/2-way-butterfly-valve-with-johnson-2-position-damper-actuator-200-psi/
2 Way Butterfly Valve with Johnson 2 Position Damper Actuator (200 PSI) - VSI
[ENQUIRY_BUTTON product_id=1149]
butterfly valve