Cyclopedia of heating, plumbing and sanitation; a complete reference work . wilh W(„. avoid the expense and care of a pump. ing Parts External. Damper=Regulators. Every heating and every power plantshould he provided with automatic means for closing the damperswhen the steam pressure reaches a certain point, and for openingthem again when the pressure drops. There are various regulatorsdesigned for this purpose, a simple form of which is shown in Fig. 125. Steam at boiler pres-sure is admitted beneath adiaphragm which is .bal-anced by a weighted the pressure rises to acertain po
Cyclopedia of heating, plumbing and sanitation; a complete reference work . wilh W(„. avoid the expense and care of a pump. ing Parts External. Damper=Regulators. Every heating and every power plantshould he provided with automatic means for closing the damperswhen the steam pressure reaches a certain point, and for openingthem again when the pressure drops. There are various regulatorsdesigned for this purpose, a simple form of which is shown in Fig. 125. Steam at boiler pres-sure is admitted beneath adiaphragm which is .bal-anced by a weighted the pressure rises to acertain point, it raises thelever slightly and opens avalve which admits waterunder pressure above a dia-phragm loeated near thesmoke-pipe. This actionforces down a lever con-!^^ nected by chains with the Fig. 123. Showing Interior Detail of Return Trap damper, and closes it. of Fig. 122. When the steam pressure drops, the water-valve is closed, and the different parts of theapparatus take their original positions. Another form similar in principle is shown in Fig. 126. In this. 144 HEATING AND VENTILATION 135 case a piston is operated by the water-pressure, instead of a both types the pressures at which the damper shall open and closeare regulated by suitable adjustments of the weights upon the Connections. The method of making the pipe connectionsin any particular case will depend upon the general arrangementof the apparatus and the various conditions. Fig. 1_!7 illustrates EXHAUST= n ™ 1 A a. ffsra ™ \ Hs^—_c3r*tvn^ L n Y 1 1t#£ra • 1 1 1 1 i i i i \ i i i l 1 i 1 i i i i i i i i i i i i i i i 1 1 ! 1 i i i i i i i 1,1 II i i i i i \ 1 1 1 i i i i i i i 1 1 1 i i ii i\ 1 i i u- i i i i i i i S i i i i i i i i < 1 1 ILJ i i i i i i i li i 1 1 1 1 i i i i i i i ? i i i i i ii i i i i i i i i I I I I i 1 I I i l l f- i i i i i i i 1 1 I I I I I II 1 1 Ihi i i i
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