Pragati Automation Pvt. Ltd. Manufactures Closed Centre Rotating Hydraulic Cylinders with Built-in Safety. Pragati Automation Pvt. Ltd. Manufactures Machine Tool Accessories particularly for CNC Machines. The Closed Centre Rotating Hydraulic Cylinders with Built-in Safety comes with Compact design with high-strength aluminium components for long life and low moment of inertia. The Closed Centre Rotating Hydraulic Cylinders with Built-in Safety is fitted with built-in, pilot operated check valves; to retain pressure in the event of hydraulic failure. The Closed Centre Rotating Hydraulic Cylinders has Working Pressure up to 40 bars.