. The American florist : a weekly journal for the trade. Floriculture; Florists. 116 The American Florist. Feb. 9- admitting live steam when the exhaust is not sufficient to maintain the required pressure, and the latter to allow the sur- plus to pass outboard when the quantity is greater than can be condensed in the heating system. Before entering the heating main the exhaust should be passed through a good form of oil sep- arator, and is is well to still further purify the return by the use of a set- tling chamber. Any of the usual systems of piping may be used, but great care should be take
. The American florist : a weekly journal for the trade. Floriculture; Florists. 116 The American Florist. Feb. 9- admitting live steam when the exhaust is not sufficient to maintain the required pressure, and the latter to allow the sur- plus to pass outboard when the quantity is greater than can be condensed in the heating system. Before entering the heating main the exhaust should be passed through a good form of oil sep- arator, and is is well to still further purify the return by the use of a set- tling chamber. Any of the usual systems of piping may be used, but great care should be taken that as little resistance as possible is introduced at bends and fittings, and the mains and branches should be of ample size. Usually the best results are obtained from the system in which the main steam pipe is carried directly to the top of the building, the distributing pipes run from that point, and the radiat- ing surfaces supplied by a down-flowing current of steam. Pipe sizes should generally be based on a drop in pressure of one-fourth pound in 200 feet length of run. In order to secure the benefit of a sealed return, a "false water-line," so- called, is established by the use of a water-line trap. This consists of a con- stant discharge float trap of large size, mounted at such an elevation as may be necessary to produce the desired depth of water-seal. The return pipe should be brought into the bottom of the trao instead of the too as is usually the case, and a balance pipe for equalizing the pressure connected with the top. This pipe should be, if possible, not less than 15 or 20 feet in length and provided with a globe valve near its connection with the heating main. The reason for this is to allow the space above the water in the trap to be- come filled with air. after which the valve may be opened just enough to al- low the steam pressure to act upon the air cushion in the trap without driving it out. If the steam is allowed to enter the trap, its con
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfloriculture, bookyea
