VALVE INSTALLATION 



I'lLOT YAI.VK 



EVCH of the five boilers (four 400 II.P. and 

 one 320 H.P.) in the Singer Building are 

 fitted with the Foster Engineering Company's 

 Combination, Automatic Non-Return and Emer- 

 gency Stop Valves. (See illustration.) 



These valves are used for preventing a back-flow 

 of steam into a broken or defective boiler in the event 



PI I HT ftD ^ * ne blowing ou t f a tube, poor 



firing, a drop in pressure, etc., the 

 MhAM-UUV- I . 11 i -t .1 



FPNINf VAI VFS va ' ves automatically closing if the 

 header pressure exceeds the boiler 

 pressure slightly, remaining open when the pressure 

 of the five boilers is equalized. In addition, they 

 also automatically close, cutting off the entire bat- 

 tery of five boilers should the header or any of the 

 steam lines break, or in the event of a rupture, etc. 



On the face of each boiler, mounted on the 

 polished brick surface, is located the Pilot or Govern- 

 ing Valve; the diaphragm chamber of this valve is 

 connected by a system of extra heavy brass auxiliary 

 piping (concealed within the wall) to the header 

 and the main steam line. There are two connections 

 to this Pilot Valve: one on the inlet side takes steam 

 from the boiler direct and remains closed under 

 normal conditions. The outlet or discharge side 

 of this Pilot Valve is connected to the closing piston 

 of the main boiler valve. 



In the event of a rupture, as above referred to, 



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VAI VF<s 



tin- pressure in the diaphragm chamber drop-,. 

 opening the Pilot Valve and allowing the steam 

 from the boiler to pass through it to the closing 

 piston, thus closing the valves automatically. 



This Pilot or Governing Valve is highly polished 

 and finished and presents an attractive appearance. 

 On the inlet connection, just within the union. i> 

 located a small strainer, which serves to prevent the 

 passage of foreign matter that may be carried through 

 the pipe, thus preventing the Governing Valve from 

 leaking. 



Each Pilot Valve is equipped with two gauges, fin- 

 ished and polished, one indicating the boiler pressure 

 and the other the line pressure, so that at a glance the 

 engineers can note the pressure on their lines at all times. 



At a point some 250 feet distant from the boiler 

 room, in the Chief Engineer's office, there are located 



on e wa " an( ^ m ounted on an 

 elaborately finished marble gauge 

 board of unique design, five emer- 



gency valves (one for each boiler). 



These emergency valves are simply f-inch brass- 



finished globe valves, each equipped with a polished 



gauge that records the main steam-line pressure. 



By their use the Chief Engineer, without leaving 



his chair, can by the mere cracking of one of these 



valves cut out or control 



any one or all of the boil- 



ers in the battery at will. 

 These valves are like- 



wise connected with the 



Pilot or Governing Valve 



in the boiler room bv 



tt 



the brass auxiliary pip- 

 ing carried through the 

 building and concealed 

 within the walls. 



Opening one of the 

 Emergency Valves bleeds 

 the steam from the dia- 

 phragm chamber of the 

 distant Pilot or Governing 

 Valve, having the same ef- 

 fect on the main valve as 

 a break in the line, he- 



cause it then admits boiler pressure through the Pilot 

 to its closing piston, thus automatically bringing the 

 main boiler valve to its seat as previously explained. 



This emergency feature is particularly valuable 

 to the Chief Engineer, as it not only permits him to 

 control any boiler at will without the necessity of 



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KMKlUiKNCV VAIAK 



