Archive image from page 374 of Department bulletin (1923-1929). Department bulletin departmentbul11261150unit Year: 1923-1929. 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 bouncing. Fig. 2.—A Reducing Valve Used for a Wide Range of Pressures. The reduced pressure operates the diaphragm A
Archive image from page 374 of Department bulletin (1923-1929). Department bulletin departmentbul11261150unit Year: 1923-1929. 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 bouncing. 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 valve.
Size: 1885px × 1061px
Photo credit: © Bookive / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1920, 1923-1929, archive, book, bookauthor, bookdecade, bookpublisher, bookyear, drawing, historical, history, illustration, image, page, picture, print, reference, united_states_dept_of_agriculture, vintage, washington_d_c_the_dept_supt_of_docs_g_p_o_
