supply of heavy duty air cylinder , heavy duty air cylinder 2a series to size 20 inch bore x 8 inch stroke x 3 inc h rod dia to m/s parker model no 20 chb-2auv14ac8 or similar make of m/s bhavana flui d power or m/s island hydraulic or m/s protel engg or m/s dowin hydraulics. note: pist on seals, gland cartridge- and all seals kits shall be of viton material and of parker m ake only. for kind attention of tenderers special conditions for purchase of pneumatic and hydraulic cylinders 1) the firm should have been in the field of manufacture of hy draulic/pneumatic cylinders for the past 10 years. proof to be enclosed. 2) firm should furnish inspection/test certificate along with the supply. 3) firm should furnish warra nty/guarantee for their product. 4) firm should furnish enclose list of units where th eir similar items are working satisfactorily. performance certificates from two such u sers should be furnished. 5) in case supplies have been made to rwf earlier, details sho uld be furnished for assessing past perforamance. 6) firm should furnish evidential ce rtificates as proof of procurement from authorised dealers in original parker make se als/seal kits and gland cartridges, used in the cylinder, along with the supply. ]