| 单词 | ball valve |
| 释义 | > as lemmasball valve ball valve n. (a) a valve opened or closed by the rising or falling of a ball which exactly fits a cup-shaped opening in the seat; (b) = ballcock n. ΘΚΠ society > occupation and work > equipment > machine > parts of machines > control(s) > [noun] > valve > others washer1596 turncock1702 air cock1709 Jack-in-the-box1728 runner1754 stop-valve1829 three-way cock1838 ball valve1839 relief valve1846 poppet valve1851 plunger valve1854 pot-lid1856 reflux valve1857 screw-down1864 mica valve1880 tide flap1884 tube-valve1884 swing-tap1892 relay valve1894 Schrader1895 pilot valve1900 mixer valve1904 spool valve1908 spill valve1922 safety valving1930 three-way1939 1839–47 Todd's Cycl. Anat. & Physiol. III. 631/2 A mechanical office somewhat on the principle of the ball-valve. 1841 W. Templeton Locomotive Engine 38 The valves used are termed ball valves, being spheres of brass..situated in the pumps covering the orifices of inlet to the boiler. 1901 G. L. Sutcliffe Sanitary Fittings & Plumbing xiv. 126 Water-closets are now generally supplied directly from a separate cistern having an inlet controlled by a ball-valve. 1948 A. W. Turner & E. J. Johnson Machines for Farm, Ranch, & Plantation xviii. 748 Remove ball valve on suction side of pump to clean and sand lightly. 1991 Offshore Engineer Sept. 14/1 A ball valve needs little regular maintenance, but when its soft seats eventually do require maintenance..it must be taken out of line, refurbished and then replaced back in line. 1993 Collins Compl. DIY Man. (new ed.) ix. 410/2 Check feed-and-expansion tank in loft. If empty, the valve may be stuck. Move ball-valve float arm up and down to restore flow and fill system. < as lemmas |
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