Mechanical Contracting & Plumbing January-December 1909 . ve valve hasbeen placed on the market by Warren, justed. Instead of a cumbersome wheelarrangement there is a small handlewhich can be easily grasped, and withthe marking off of its circle of actioninto pressure sections, there is no dif-ficulty in regulating the heat, and main-taining any desired temperature in aroom. The Webster modulation system is anew method of circulating steam at lowpressure, and provides a satisfactory-heating system for small and mediumsized buildings. In principle the Web-. ster modulation system is essentially
Mechanical Contracting & Plumbing January-December 1909 . ve valve hasbeen placed on the market by Warren, justed. Instead of a cumbersome wheelarrangement there is a small handlewhich can be easily grasped, and withthe marking off of its circle of actioninto pressure sections, there is no dif-ficulty in regulating the heat, and main-taining any desired temperature in aroom. The Webster modulation system is anew method of circulating steam at lowpressure, and provides a satisfactory-heating system for small and mediumsized buildings. In principle the Web-. ster modulation system is essentially thesame as the Webster system of steamcirculation except that no pump norother exhausting apparatus is neces-sary. The differential between the sup-ply and return lines is maintained asusual by the Webster water seal valve,and the return piping being vented tothe atmosphere there is never more thanatmospheric pressure therein. The re-turn water is separated from the air andgravitates to a low point on the systemfrom whence it is returned to the boilers. Webster Modulation Valve. Webster & Co., Camden, , whoseCanadian agents are Darling !>, s., Mon-treal, to act in conjunction with theirnew modulation system. This valve, ascan be seen from the cut we herewithpublish, is most easily operated and ad- 20 automatically. Tn the operation of thissystem the Webster modulation valveplays an important part. One is placedat the supply end of each radiator , and enables any desired temperature to be maintained. April 15, 1909 PLUMBER A I\ D STEAM FITTER PLUMBING AND H MONTREAL. April 14.—A bright tone is observableamong the supply houses. A markedspring- movement is now showing, andall lines have improved. The fact thatthe permits for Mairch were numericallygreater and of higher value than forthe same month for the two previousyears, and that April has opened outeven more encouragingly, has given theneeded stimulation to trade generally,and inspired confidence as to the fut
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