... piston valve, pneumatic piston valves for neutral liquid and gas mediumbrass body,controled by air cylinder.ModelQ22HD-40Name:Q22HD ... type, flashboard type, two-position flux adjustable type, and now widely applied to machines for food, medication, industry ... , abstersion, petroleum chemicals, metallurgy, coating and vehicles.Ordering Code Q | Pneumatic 22 |Two-position Two- ...