1. If Used In Conjunction With A Lift Valve With Proportional Fall Function, The Proportion Of The Manual Valve Handle Can Be Adjusted,The Movement Controls The Falling Speed Of The Box Body.2. Under Normal Pneumatic Connection, When The Handle Is Moved To The Lifting Position, The Oil Cylinder Will Automatically Lift.3. Under Normal Pneumatic Connection, When The Handle Is Moved To The Lowering Position, The Oil Cylinder Will Automatically Lower.4. Under Normal Pneumatic Connection, When The Oil Cylinder Is Lowering Or Lifting, Turn The Handle To The Mid Stop Position,The Oil Cylinder Will Appear In A Paused State.5. When The Air Circuit Connection Is Normal, Turn The Handle To The Descending Position And Slowly Lower The Power Take-Off Control HandleMove Up And The Oil Cylinder Will Show A Slow Lowering State.TECHNICAL PARAMETERS:1. Maximum Pressure: 0.12mpa2. Minimum Pressure: 0.06mpa3. Maximum Temperature:+80 °C4. Minimum Temperature: -40 °C