supply of hydraulically regulated door closerhydraulically regulated door closer,hydraulically regulated door closer as per specification: conforming to latest version of is 3564 as amended upto date attached with non-porous body and back plate made of aluminum allo y conforming to latest version of is 617 should have torsion spring to stand of a steel conforming to l atest version of is 4454 (part 2) and nuts for fixing made of cast iron conforming to latest version of is 210 type of door closer and tubular type (type b)- as per fig. 3 and 4 of governing specification , e xposed type hydraulically regulated door closers, vertical hinge type doors closer, door closer with op ening to one side only and not weighing more than 80 kgs, piston or rack-pinion with steel aluminum alloy conforming to latest version of is 7283 all weather resistant homogeneous high viscosity hydraul ic fluid for hydraulic oil conforming to latest version of is no. 3098 adjusting arm , main arm & clamp for steel conforming to latest version of is no.7283, nominal sizes of door closers and designation of c loser 3 ? for main doors in a building such as entrance doors (mass of door 61 to 80 kgs), eccentric sh aft, internal bearing and gland, main arm bolt & top nut, pawl of a steel conforming to latest version of is no.7283 have been top lid: zinc alloy conforming to latest version of is no. 742 and accessories m ust be supplied with each closer for one fitting key, suitable spanner ,adjusting the spring valve and re gulating screw along with leaflet furnishing instructions for installation, closing time of regulating scre w: 10sec , hydraulic oil filling shall work for satisfactorily (at all temperature between 50 degree centi grade and 10 degree centigrade without requiring any change except adjustment of the regulating sc rew, provision for securely fixing the door closer to the door frame and to the door panel ,provision for carrying out repairs - such as replacement of broken spring, oil s