Handbook for heating and ventilating engineers . VACUUM PUMP Fig. HIGH \ACUUMLt=3 > Fig. 79. pressure from that in the suction line. A modulation valve, foY graduating the steam supply to theradiator, has been designed by this Company and maybe applied to any Weibster Heating System to assist in its 148 HEATING AND VENTILATION regulation. This modulation valve serves to graduate thesteam supply to the radiators so that the pressure may bemaintained at any point to suit the required heat loss fromthe building. 94. Van Auken System:—In this system, as in the pre-vious one, the vacuum in
Handbook for heating and ventilating engineers . VACUUM PUMP Fig. HIGH \ACUUMLt=3 > Fig. 79. pressure from that in the suction line. A modulation valve, foY graduating the steam supply to theradiator, has been designed by this Company and maybe applied to any Weibster Heating System to assist in its 148 HEATING AND VENTILATION regulation. This modulation valve serves to graduate thesteam supply to the radiators so that the pressure may bemaintained at any point to suit the required heat loss fromthe building. 94. Van Auken System:—In this system, as in the pre-vious one, the vacuum in the return main is produced by avacuum pump wlhich is controlled by a specially designedgovernor. The automatic valves which are placed on theradiators, coils and other drainage points along the system,are called Belvac Thennofiers, and are shown in section byFig. 80. This valve is automatic and removes the water of condensation by the controlling ac-tion of a float. It is connected to theradiator or coil at fi^ and to the vacu-um return pipe at L. The water ofcon
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectventila, bookyear1913
