Document 99Qjyqp3Jv6NbpxzjdpK5yzEL

muat be brought to boiler pressure, which U th* ^ pose of the economiser. CP* Water feed to the economiser is controlled h of the various types of boiler level controls. shown here is a thermo-hydraulic generator, in the water column serves as the generator. The* column consists of two concentric lubes. The inner ml is connected to the boiler drum obove nnd belo* iL water line. The outer lube, which contains t usually water, is connected to o control valve up feed woter piping. A change in the boiler wstteeTlS changes the temperature and the pressure of the Lu in the outer tube and operates the contlrotdl T*|,t hydraulically. The more efficient counterflow heal transfer tori in this economiser, is preferred to the parallel g type wherever installation is possible. The water eata the economiser ot the bottom ond goes out st the to* with the flue gases directed to flow down over the PRACTICAL PIPING LAYOUTS A Use the right type valve for the service. B Place valves correctly in the line. 0 Choose Jenkins Valves for lifetime economy., ' omiser tubes. Pressure relief volves are required the economiser outlet, ond a by-pos* allows theboife to be operated even though some of the tubes foil. Other types and pressure ranges of Jenktni Vsho can be used for this type of layout according to (k! factors involved. Consultation with accredited pipbfi engineers and contractors is recommended whenpl: ning any major piping installation. Copies of Layout No. 40 will be furnished on respuA Mail coupon. Fig, 270>U, Jenkins Bronse Gale Yolve, it iw> mended for unequalled economy under severe ccow lions. It has a nigh quality bronse wedge sad>| against MONEL seat rings expanded in the body- eu is token by the wedge whfen can be replaced esoqLonger, large diameter threads on manganese bn** spindle reduce wear, permit turning with 1cm cn0*1 Construction throughout is exceptionally rugged. A CHOICI OF OVER 500 JENKINS VAlff* To save lime, to simplify planning, to get til desd* to'ges of Jenkins specialised valve engineering e*P ence, seleet oil the valves you need from the Catalog. It's your best assurance of lowest c**w long run, . Jenkins Bros* 80 Whit* Street. New York IS: Conn.; Atlanta; Boston; Philadelphia; Chlctpi *** 1 Jenkins Bros* Ltd* Montreal.