bids are invited for repair and overhauling service - 4458 overhauling of oily water separator ins karmuk; oily water seperator; yes; buyer premises repair/overhauling of oily water seperator - ins karmuk (sr-25) dismantle and clean both recovered oil valve. refit/ renew components as necessary. paying particular attention to operating and line diaphragms. work involve:- (a) take out, clean, inspect and service all three 50nb valves. (b) take out, clean, inspects and services all four 1/2 valves. 1 1 (c) take out, clean, inspect and service all three 1 valves. (d) inspect/ service body and plunger of electro pneumatic valve assembly. (e) service the pressure relief valve and calibrate it at 1.5kg/sqcm. (f) dismantle all 3 electropneumatic pilot valve, inspect, repair/replace as total quantity :