. Reliable vacuum and vacu-vapor heating equipment . tener always keeps the belttight, and prevents it slipping—there is no lost motion,or binding. Friction and wear are reduced to a mini-mum. Cylinder is of the vertical single-acting type, cast in onepiece with the stand. Piston. The heavy bronze piston is of the simple plungertype. The connecting rod is iron, with bronze main shaft bearings are phosphor bronze. Valves. The two valves are held in place by a phosphorbronze spring, which insures easy operation and posi-tive seating. The valves are easily accessible. Thevalves are c
. Reliable vacuum and vacu-vapor heating equipment . tener always keeps the belttight, and prevents it slipping—there is no lost motion,or binding. Friction and wear are reduced to a mini-mum. Cylinder is of the vertical single-acting type, cast in onepiece with the stand. Piston. The heavy bronze piston is of the simple plungertype. The connecting rod is iron, with bronze main shaft bearings are phosphor bronze. Valves. The two valves are held in place by a phosphorbronze spring, which insures easy operation and posi-tive seating. The valves are easily accessible. Thevalves are composition, and are very durable, either sidemay be used. The valve seat is removable, and is madeof bronze. Base is heavy iron, cast in one piece. It has a gutter aroundthe edge to catch any drip. Lubrication. The bearings have large grease cups, whichrequire only occasional filling. See page 78 for specifications and dimensionsof the No. 2779 Electric Pump Forty VACUUM HEATING EQUIPMENT RELIABLE RETURN LINE ELECTRICVACUUM PUMPS Nos. 122 AND 123. See page 38 for list of equipment included with these pumps NOTE THE SIMPLICITY The RELIABLE Electric Vacuum Pumps arepositive-acting, and require much less power thanany other vacuum pump. The cost for currentis only i to i that of other makes. RELIABLEPumps are remarkably simple in construction,having no small or complicated parts to get outof order, causing trouble and costly delays. See page J^S for complete description Forty-One THE RELIABLE RETURN LINE RELIABLE RETURN LINE ELECTRICVACUUM PUMPS Nos. 124 AND 125
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