Congress top quality single groove die cast pulleys. For use with 4L (1) type V belts. Each pulley is individually boxed and clearly marked. The bore and belt groove of each pulley is machined and balanced for concentricity assuring smooth op- eration and long service life of both pulleys and belts. Each has socket set screw (installed). Pulleys 5” and smaller are solid type; 6” and larger are spoke type. 1/2” bore pulleys have no keyway. 5/8”, 3/4” and 1” bore have standard keyway.
Permits speed variations of approximately 30%. Ideal for air conditioning units and other installations where speeds must be changed or it is impossible to pre-determine the correct speed. Suitable for use with 3L(0), 4L(A), and 5L(B) V-belts. Quality die cast construction and individually machined for long, smooth service life. Furnished with socket set screws.
1/2” BORE
CAT. NO. OUTSIDE DIAMETER 3-1/4” 3-1/2” 4”
6L075 6L078 6L081 6L084
4-1/2”
PITCH DIA. 4L(A) BELT 2.1-3-1 2.4-3.4 2.9-3.9 3.3-4.3
Substantially reduces heating costs in commercial and indus- trial buildings by eliminating heat stratification that occurs near the roof. Warm air trapped at the ceil- ing often measures 10 to 25° more than at floor level. A practical so-
lution is the installation of heat fans to recirculate the hot air down to floor level at a low velocity. Floor-to-ceiling air temperatures become uniform and cold spots are eliminated.
Heat fans will effectively de-stratify a 2500 sq. ft. area at a maxi- mum 30 ft. ceiling height, or 1200 sq. ft. at ceiling heights of 35 to 40 ft. If close control of fan speeds is required, a solid state variable speed control is available for remote mounting. Motor is permanently lubricated PSC type; operates on 115V AC power and draws only 1 amp. UL listed.