120 



The Florists^ Review 



Juki 9, 1921 



a cool houae located at a lower level 

 than the others, it is often advisable 

 to put in ' ' economy coils, ' ' through 

 which the condensed water will circu- 

 late before going back to the heating 

 plant. In this way the efficiency of the 

 steam can be increased fully ten per 

 cent. 



"When it is possible to carry the con- 

 densation back to the heating plant at 

 a temperature of 150 degrees, as may 

 be done when the distance is not great 

 and the return pipe is properly in- 

 sulated, this permits a considerable 

 saving of fuel, as compared with the 

 cost of raising the temperature of well 

 water from 50 degrees to 212 degrees. 

 We are told that it requires the ex- 

 penditure of 967 degrees to form steam 

 from water at 32 degrees, and on this 

 basis, while approximately 950 degrees 

 will be required to turn well water at 

 its usual temperature into steam, only 

 850 degrees will be required if the 

 water has an initial temperature of 150 

 degrees, and still less if it is returned 

 at a higher temperature. On this basis 

 an allowance of ten per cent, less any 

 increased cost for returning the water, 

 might be made, as compared with the 

 cost when it is turned into the drains. 



A Nebraskan's Example. 



Acting on advice obtained through 

 the Greenhouse Heating department of 

 The Kevicvv in 1919, F. J. Ayres, of 

 David City, Neb., now uses this method 

 of heating his houses and pronounces 

 it "sure a success." The houses heated 

 include a main house, 34x100 feet, with 

 a walk down the center across the 

 width. On each side of this walk are 

 six benches, forty-six feet long and 

 forty-two inches wide. Joining this 

 main house is a small house, 18x76 feet, 

 where ground beds are used. Against 

 the walls of botli the main house and 

 the small house is a small service house, 

 18x24 feet. This makes, practically, 

 a house 100x100 feet square, having a 

 glass area of about 5,000 feet. 



He secured a 15-year contract with 

 the city couiioil to connect with the ex- 

 haust pipe of the city light plant. He 

 was to make all connections and agreed 

 to return all condensation to the plant's 

 cistern. The cistern su])j)lica the boil- 

 ers in the light plant at a saving of 

 about $1.50 per day for l)oiler com- 

 pound which it was forced to use be- 

 fore the connections were made. The 

 light plant coinjirises two 150-horsc- 

 power boilers and two lOO-horsepowcr 

 engines. It gives day and night serv- 

 ice, the full twenty-four hours. 



Connections. 



The exhaust steam is carried from 

 the engines in an 8-inch pipe, and an 

 oil separator was connected on. An 

 8-inch back-pressure valve was at- 

 tached, but cmjiloyed only once Inst 

 winter, when the temperature outside 

 registered 16 degrees below zero. Con- 

 nection was made with an 8x4i^x8-inch 

 tee. 



The 4iA-inch joint in the tee connects 

 with a li/{)-inch pipe wliich runs into the 

 greenhouse. There is a gate valve in 

 this pipe. After this pipe leaves the 

 engine room it drops down to two and 

 one-half feet under the ground. It is 

 enclosed m wood logs in order to obtain 

 the proper insulation. "When it reaches 

 the greenhouses it is brought up level 

 with the gutters. It is split when it 

 enters The greenhouse, a 4x4%x4-inch 

 tee carrying the 4-inch pipes in two 



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I 



Is Your Steam Dry? 1 



Dry steam is essential to even heat. Moisture in your E 



pipe lines is an obstacle to proper temperature in your 5 



range. It leaves your end runs lukewarm. In cold weather 5 



considerable damage may result from this lack of heat. E 



Fisher Steam Trap | 



(TYPE 33) I 



insures dry steam— simplifies your heating problem. It is a E 



positive-acting steam trap that will quickly and completely E 



remove all condensation from your pipe lines. Dry, hot E 



steam races through your mains to the very last run — E 



unhindered by any heat-killing condensation. E 



The extra large capacity of the Fisher Trap enables it to ^ 



operate more forcibly — less frequently. E 



There is E 



A perfect water seal is maintained at all times, 

 no steam leakage in the Fisher Trap. 



The Fisher Trap has proven its superiority in thousands 

 of greenhouses throughout the country. Several of the 

 best known greenhouse manufacturers use the Fisher Trap 

 exclusively in their installations. 



Let us tell you more about the Fisher Trap, 

 today. 



Write us E 



I The Fisher Governor Company | 



E 522 Fisher Avenue Marshalltown, Iowa E 



= Agencies in all principal cities E 



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