. Department bulletin. Agriculture; Agriculture. Fig. I.—A Piston Type of Balanced Reducing Valve Especially Adapted to Service in which the Flow of Steam Is Continuous. The low-pressure steam acts on the piston P in the cylinder and tends to close the valve V. Loose weights hung on the horizontal lever counteract this tendency. The dashpot D steadies the motion of the piston and valve, preventing Fig. 2.—A Reducing Valve Used for a Wide Range of Pressures. The reduced pressure operates the diaphragm A under the main adjusting spring B, thus opening and closing a small pilot valve C
. Department bulletin. Agriculture; Agriculture. Fig. I.—A Piston Type of Balanced Reducing Valve Especially Adapted to Service in which the Flow of Steam Is Continuous. The low-pressure steam acts on the piston P in the cylinder and tends to close the valve V. Loose weights hung on the horizontal lever counteract this tendency. The dashpot D steadies the motion of the piston and valve, preventing Fig. 2.—A Reducing Valve Used for a Wide Range of Pressures. The reduced pressure operates the diaphragm A under the main adjusting spring B, thus opening and closing a small pilot valve C concealed in the plug under the diaphragm. The pilot valve controls the admission of high-pressure steam to the space D between the two pistons E in the bottom of the body; this steam forces the pistons E up and so opens the main valve F. When the pilot valve closes, the high-pressure steam on the main valve F, the low-pressure steam on the larger piston, and the valve spring all act to close the main Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. Dept. of Agriculture. Washington, D. C. The Dept. : Supt. of Docs. , G. P. O.
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Keywords: ., bookauth, bookcentury1900, bookdecade1920, booksubjectagriculture
