. Reliable vacuum and vacu-vapor heating equipment . ener 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 co
. Reliable vacuum and vacu-vapor heating equipment . ener 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 77 for specifications and dimensionsof the No. 1279 Electric Pump Thirteen THE RELIABLE AIR LINE RELIABLE AIR LINEELECTRIC VACUUM PUMP No. Ill—Gear Driven. See page 11 for list of equipment included with this pump. The No. Ill RELIABLE Electric Vacuum Pump isautomatic and noiseless, and draws air continuously whenin operation. It is operated to its full efficiency by a % horsepower motor. The cost for current is very low. The No. Ill Pump has no complicated, unnecessaryparts to get out of order, and is built to give many yearsof satisfactory service. See detailed description on next page Fourteen VACUUM HEATING EQUIPMENT DETAILED DESCRIPTION OF No. Ill RELIABLEAIR LINE ELECTRIC VACUUM PUMP Cylinders, This pump has two vertical, single-actingcylinders, which always draw air steadily when in opera-tion. The cylinders are heavy seamless brass tubing. Capacity. This pump will handle heating systems havingup to 5000 square feet of direct radiation. Electric Motor, either direct or alternating current, is ofstandard make—% horse power. It starts easily underfull load, and will operate on a
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