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Delavan PowerMax Hydraulic Cylinder is designed and manufactured to meet the most demanding requirements. The PowerMax line was developed because understand the need for professional performance and durability. All PowerMax Cylinders are hydraulically tested at twice their working pressure. Chromed polished and individually heat-treated shaft provides extended cylinder life Working pressure 2500 PSI All cylinders are 100% hydraulically tested up to two times working pressure Built tough enough to stand up to the roughest conditions Pins and retainers high tensile steel zinc plated to prevent corrosion comes with cotter pin retainers Ports double ported NPTF for greater flexibility of assembly unless otherwise stated cylinders assembled with ports inline Piston nut heavy duty automation grade self locking piston nut holds piston in place under high cycle loading Piston ductile iron precision machined providing a malleable bearing surface for extended cylinder life Piston seal 90 durometer O-ring with anti extrusion back up washers provide sealing under high load conditions Tie-rods high tensile steel to prevent failure under high pressure Cylinder shaft high strength hard chrome plated shaft provides extended cylinder life in harsh applications Tube precision finished skive and burnished heavy wall steel tubing for extended seal and cylinder life Rod seal Premium Double Lip Polyurethane BS profile using a double lip design for leak-free performance throughout the pressure range and longer life expectancy Rod cap and clevis cap ductile iron comes with drilled oil passages offering increased bearing surface for high shock and side load applications Rod wiper Polyurethane AN or D Style provides a tough/hard material to remove contaminants from shaft surface Threaded shaft on ASAE cylinders to accept optional mechanical stroke control not applicable to 5 “bore cylinders Rod clevis ductile iron able to withstand continuous high load without wear or fracture Series PML – 2500 PSI 5000 PSI proo