Section 89.—VALVES AND COCKS.
(See also [p. 198].)
[2527]. Slide valve ports, with gradual cut-off.
[2528]. Piston valve in section. See [No. 1654]. This construction avoids spring rings, which do not run well across the ports, the entire valve being sprung into the bore.
[2529]. Tube air valve. Can be made to open and shut by revolving, or by longitudinal motion.
[2530]. Corliss valve, with rectangular rocking spindle.
[2531]. Flume valve for water.
[2532]. Double cone valve for steam or water, closes the leakage round the screw when opened, and requires no packing.
[2533]. Double ported slide valve.
[2534]. Cone plug and rubber ring for plugging a pipe.
[2535]. Reversing valve for gas or air blast.
[2536]. Slide valve to give a wide port opening with short travel.
[2537]. Removable valve seat, or gland, secured by three set screws and lugs inside the valve box.
[2538]. Safety valve, with double ball joint seatings, held down by dead weight, hung on the outer case.
[2539]. Oscillating ring valve.
High-pressure hydraulic slide valves are now made of hard wood, such as lignum vitæ, running on a bronze face; the wood valve is sometimes enclosed in a bronze body or strap.
[2540]. Hydraulic high-pressure valve, with renewable face.
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[2541]. Tap, with crank movement, to open and close an ordinary mushroom valve.
[2542]. Spring loaded valve. May be opened by lifting, as shown, or by a horizontal pull in any direction, the pull rod being attached to the top of a fixed stud in the centre of the valve, which then tilts in opening.
[2543]. Safety valve, with knife edge.
[2544]. Screw plug bottle stopper. (Codd’s patent.)
[2545]. Dished grating valve.