Pump bearings

Uses. Uses for copper—siUcon alloys are siUcon bronze, UNS C 87200, as bearings, pumps, valve parts, marine fittings, and corrosion-resistant castings siUcon brass UNS C 87400 as bearings, gears, impellers, valve stems, and clamps and siUcon brass UNS C 87500 as small propellers, valve stems, gears, and bearings. 

Bronzes Bearings, pump impellers, special-purpose tubing, heat exchanger tubing, screens... 

Impedance, batteries, 3 410, 425-426 Impedance area product (ZA), 19 139 Impeller-between-bearings pumps,... 

Table 2-5— Vibration Limits for Overhung and Between Bearings Pumps...

Figure D-5A—Piping for Between Bearings Pumps—Plans A, B, D, and K...

Figure D-5B—Piping for Between Bearings Pumps—Plan M...

Axially-split one-and two-stage between-bearings pumps shall be designated pump type BB1. 

Table 7 — Vibration iimits for overhung and betweer>bearings pumps...

Figure B.6 — Piping for between-bearing pumps — Plan A, cooling to bearing housings...

Figure B.7 — Piping for between-bearings pumps — Pian D, gland quench...

These engineering thermoplastics are used as gears, bearings, pump impellers, pulleys, pump housings, switch parts, and furniture parts. 

Other smaller pumps are used in the model tank system. Figure 5 shows the pump tube as made up for a cold trap pump. This little pump operates on 750°F. sodium and transfers sodium from the model tank to a cold trap and back to the model tank (Figure 3). It has operated for 7000 hours without attention of any kind. Figure 6 shows an Allis-Chalmers canned rotor fluid bearing pump that circulates coolant for maintaining a AT across the cold trap itself. This pump has operated very well at temperatures of 300 °F., where the pump is deliberately placed in the cold end of the heat transfer system. 

Figure 6. Aliis-Chaimers canned motor fluid bearing pump...

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