Document Z4MNm0Mo1X4Z5m2omGMwggZmV

TT C/sK"A-"::^ i#]k > ^P7& :te:aas `V-!v/ . ^ cV * ) * , '*. svs At*mr }*r tFNO'IH OH-Ffw Cempnmr Belts* Jtj ITC04 OH-Tret VtrtittlCamPnntr `3 I >Vj Backed by manufacturing experience since 1915 it Special lightweight pistons mini, mlie wearing pressure on the rings. ir Ease of disassembly facilitates in* spection of pistons, rings, cylinder liners and valves. it On-the-job-repliceable chromeplated cylinder liners for hard, smooth. Friction-reducing surfaces. Also replaceable crosshead guides. it Carbon graphite compression rings designed to compensate automatically for wear. it Large, direct air passages end lib eral. water-jacketing reduce heat of compression end increase ring life. ^ Patented Dual-Cushion valves, all pans of which are made from corro sion-resistant materials, it All wearing areas, except carbon rings, arc either chrome-plated, sur face hardened, or of stainless steel. it Complete line of types and sires of compressors to meet say capacity and pressure requirements, o Let us quote on your eir supply needs ofaaynanin. Joy Manufacturing Company, Oliver Building, Pittsburgh 22, Po. In Can ada:Jay MmaHfmtlmrimg C*mp*ny (Cats ttdm) Limittd, Gall, Ontario. POWER JULY IK i Vid/ CLASS of power-plont youngsters at Dow Chemical Co took up valve Info to help pass upgrodlng exoms. Testing relief valve fright) ossures operation when Installed <ayi F J A rdolino, assistant *upt of sewage plant. Here ere valve Instructions he gives lo his men so they can pass test let jab-promotion requirement Mktaij for vulvea arc usually braes, bronze, Iron or sled. When selecting valves for steam, cold water, oil or gas, almost any of these metals Is- good enough. But each has eertaln limits. Never uae brass above 550 F. Bronze can stand 550-pii pressure ond tem perature up to 700 F. .Bronze ond bross vulvas usually come In smaller sites, up to and including 3 in. Above this size, use iron up to 250 psi and 500 F. Steel is for temperatures above 550 F, and la. also used when valve mutt withstand high internal or external pressures or shock. Morltingi. f.nnk at the valve body. A ,UtV 1MJ PUNT OPERATION AND MAINTENANCE SECTION 109