This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... pressure drops' and large pipe sizes for the mains are required to arcoinpliah this. The same principles governing the flow of fluids are involved and special attention must be given to make sure that the pressures throughout the system will equalize quickly. Vapor systems are generally used for house heating and ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1920 Excerpt: ... pressure drops' and large pipe sizes for the mains are required to arcoinpliah this. The same principles governing the flow of fluids are involved and special attention must be given to make sure that the pressures throughout the system will equalize quickly. Vapor systems are generally used for house heating and small plants where no exhaust Bteam is available. Thermostatic control is advisable as there U practically no variation in the temperature of the medium beyond n few degrees. Fractional valves are commonly uaed on the radiators for both vapor and vacuum systems (Fig. 2QB). 17i. Donnelly Positive Differential System.--The positive differential system consists of the following essential parts: (1) a throttling valve for admitting the desired amount of steam to the radiators, (2) an impulse valve on the outlet of each radiator, (3) a positive differential valve located at each return riser for maintaining a standard difference in pressure between the steam supply and return risers. If the engine were exhausting at H-lb-back pressure, which would be the pressure in the supply riser and in the radiators when turned on full, the valve on the radiator would be set at K lb. to reduce the steam pressure to xrro while allowing the discharge of water by gravity through the valve. The differential valves in the branch return are weighted to about 5 lb. per sq. in. (area of the valve seat) which permits a vacuum as high as 10 in. to be carried on the main return. 17c. Vacuum Exhaust Steam Heating.--Where exhaust steam is utilized or where high pressure steam is reduced, aiedueing pressure valve is required which opens and closes, governing the supply of steam automatically with the demand. This is composed of a diaphragm and spring which with the valve seat es...
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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PLEASE NOTE, WE DO NOT SHIP TO DENMARK. New Book. Shipped from UK in 4 to 14 days. Established seller since 2000. Please note we cannot offer an expedited shipping service from the UK.
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New in New jacket. Handbook of Building Construction: Data for Architects, Designing and Constructing Engineers, and Contractors (Hardback or Cased Book)
