Document x1889mzeay3JDov51E0aMx3Q6

Cross Section ttuou|h * > Mtd seal (blowing) valve In open position. Note stelilto-taced test end Cross Section ((trough seat(tss tseaUng) valve In open position. (On pressures over (503 pit (*o turd seat vaNes ate recommended.) ' JUNE 1953 RUGGEDNESS .... WHERE YOU NEED IT A one-piece forged steel block serves ps the common body for both valves in Yarway Unit Tandem Blow-Off Valves. You get rugged strength where you need it... added protection for your high pressure boilers. Whether in times of emergency, normal blow down service, or acid washing, this high safety factor is a source of satisfaction to boiler plant operators. Yarway Unit Tandems combine all advance ments of modern metallurgy with experienced design and skilled workmanship. The result -- DEPENDABLE PROTECTION. POSITIVE ACTION ... WHEN YOU NEED IT When'putting high pressure boilers on the line, or in times of emergency, you need positive action at the blow-olT valves. With Yarways you have it. Both the hard seat-seatless combinations and the hard seat-hard seat combinations provide positive opening and closing with drop-tight shut-off. Open yokes permit visual indication of the disc position in the hard seat valve and of the plunger in the seatless valve. These are some of the reasons why more than 4 out of every 5 high pressure plants in the United States are Yarway-equipped . . . and among boiler plants of all pressures, more than 16,000 are Yarway-equipped. Write for your free copy of Yarway Blow-Off Valve Bulletin B-425 (pressures to 400 psi) or Bulletin B-433 (pressures to 2500 psi). YARNALL-WARING COMPANY 100 Mermaid Avenue, Philadelphia IS, Pa. blow-off valves 49 L -]