Keystone Hydraulic Actuators

2,250 psig Operating Pressure Rating  Direct Gas/Hydraulic Actuators Ductile Iron/Stainless Steel Quarter-turn Double Acting and Spring Return Models Output Torques to 1,091,564 lb. in. Designed for “on-off” or modulating control of any quarter-turn ball, butterfly, rotary plug or damper style valve applications. For use in chemical process, food & beverage, iron & steel, off-shore marine, pharmaceutical, power, oil & gas, pulp & paper, and textile industries. Features & Benefits: High pressure construction eliminates undesirable regulators and relief valves for supply pressures. Hydraulic dampening provides smooth “open-close” operation to prevent detrimental valve slamming. Ductile iron housing provides long product life with durable, cost effective operation. Output shaft made of high strength alloy steel transmits torque without fatigue. Sintered bronze bushings or Teflon® composite bearings on output shaft eliminate sideloading of valve stem to maximize stem packing performance. Chrome-plated steel piston rod provides strength and corrosion resistance for enduring high-cycle applications. Sintered bronze piston rod bush

1,500 psig operating pressure rating Direct gas/hydraulic actuators Ductile iron/stainless steel quarter-turn Double acting and spring return models Features & Benefits: High pressure construction eliminates undesirable regulators and relief valves for supply pressures up to 1,500 psig. Hydraulic dampening provides smooth “open-close” operation to prevent detrimental valve slamming. Ductile iron housing provides long product life with durable, cost effective operation. Cylinders of 316 stainless steel provide unrivaled corrosion resistance. Output shaft made of high strength alloy steel transmits torque without Sintered bronze bushings or sealed needle bearings on output shaft eliminate side loading of valve stem to maximize stem packing performance. Chrome-plated steel piston rod provides strength and corrosion resistance for enduring high-cycle applications. Sintered bronze piston rod bushings provide low-friction support and precise alignment of the piston rod to increase efficiency, reduce maintenance and extend actuator life. Heat-treated stainless steel thrust pin and rollers transfer piston force to 17-4PH stainless steel yoke by rolling to red

Quick-acting spring-return actuators for 90° valves fast operation Special features for the °∞OLGAS-QA°± hydraulic actuato -Special 2 way / 2 positions high flow capacity dump valves -Emergency operation controlled by an electric signal to the relevant solenoid valve or by depressurising the main oil supply line or an oil pilot line -Manifold design of cylinder end flange for compact assembling of dump valves, solenoid valves, servovalves or proportional  valves, minimising the use of piping connections, reducing the risk of oil leakage also in case of strong vibrations, highly increasing the total reliability of the system and allowing easier assembly and disassembly of components -Return oil recovery into the cylinder head flange chamber during the emergency quick operation with the following benefits: -no oversizing of the oil return piping to the hydraulic power pack, with significant saving for the customer -repeatability of the relevant stroking time which is independent from the pressure in the oil return piping under any working condition of the plant  -Cylinder double tube design to connect the cylinder end flange manifold (where the dump valve