. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. berendered plainer, an enlarged section of one is given in fig. 78. The valve is designed to give a large extent of opening for the passageof steam with little traverse, a smallamoimt of power being necessary to workit. E is the fixed seat, made of cast ironor brass, which forms part of, or is securedto, the valve chamber, c is a bell-shapedvalve piece, also of brass, actuated by arod (b). The valve is in contact with itsseat at two places (d and h) which areformed into accurat
. Machinery for metalliferous mines : a practical treatise for mining engineers, metallurgists and managers of mines. berendered plainer, an enlarged section of one is given in fig. 78. The valve is designed to give a large extent of opening for the passageof steam with little traverse, a smallamoimt of power being necessary to workit. E is the fixed seat, made of cast ironor brass, which forms part of, or is securedto, the valve chamber, c is a bell-shapedvalve piece, also of brass, actuated by arod (b). The valve is in contact with itsseat at two places (d and h) which areformed into accurate conical surfaces ; theone (d) being internal, the other (h) ex-ternal. When the valve is closed thesesurfaces accurately fit similar ones on theseat, and when lifted, as shown in fig. 78, two annular openings are formed at the same time, thus giving adouble passage to the steam through the valve. The spindle (b) of the valve (c) is fixed to a centre eye, cast in onewith the valve piece, and connected to it by four arms, a a being two, theothers being at right angles to them. The seat is also formed Fig. 78.—Vertical Section of theEquilibrium Valve. T , a 9 It Jtnortt>? M i-j ui H I
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1902
