bids are invited for custom bid for services - elements of mechanical engineering lab. --1. boiler and accessories a. lancashire boiler model steel shell is of about 75 cm. long and 20 cm in diameter. two large tubes known as fire tubes pass from end to end. at the front end of each tube a furnace fire grating is placed and a door is hinged. brick work. seating and flues are shown in wood work. the boiler is complete with dead weight safety valve, manhole mud hole, check valve, steam & water safety valve, steam and water gauges etc. 01 b. cornish boiler model steel shell is about 75 cm. long and 20 cm in diameter. one large tubes known as fire tubes pass from end to end. at the front end of each tube a furnace fire grating is placed and a door is hinged. brick work, seating and flues are shown in wood work. 01 c. cochran boiler the model is the best-known vertical type fire tube boiler. the shell is about 25cm in diameter and 60cm, high the cylindrical fire box is with a door and grate at its bottom. hot gasses pass from the fuel to the combustion chamber through a short flue pipe and then to chimney through the tubes. at both ends the tube covers are given and tubes can be cleaned after their removal. the model is complete with feed chack valve, steam and water gauges, stop valve safety valve and manhole 01 d. vertical water tube boiler it is fitted inside a cylindrical fire box to increase the heating surface and improve the circulation of the water. the fire box is fitted with cross tubes. the model is complete with stop valve, check valve, safety valve, manhole, water gauge and steam gauge. 01 e. lamount boiler this is typical high-pressure boiler. it is constructed so that to demonstrate the steam & water circulate. the fuel gas circulates by the feed pump economize steam outlet 01 f. loeffler boiler model this is high pressure boiler. it consists of an economiser. drum radiant super heater & circulating mp. the model is mounted on sturdy wooden base