Welch 1399B-10 Owner's Manual

Specifications Free Air Displacement, L/M (CFM) 35 (1.2) Gas Ballast No Ultimate Pressure, Torr (mbar) 1 (1.3)x10-4 Rotational Pump (RPM) 750 Oil Capacity, quarts (Liters) 0.5 (0.47) Net Wt. Unmounted Pump, lb (Kg) 28 (13) Net Wt. Mounted Pump, lb (Kg) 49 (22) Standard Flange Size NW16 Tubing Needed (I.D. Inches) 7/16” Intake Thread Size 3/4-20 Exhaust Thread Size 3/4-20 Electrical Requirements 1 115V/230V Electrical Requirements 2 50/60Hz Electrical Requirements 3 1 Phase Motor Options 1399 Wired for 115V, 60Hz, 1Ph 1399B-01 Wired for 230V, 60Hz, 1Ph N/ ...

Parts List for Model 41-2378 Item Qty. P/N Description 1 4 2-01-0308 Screw Hex Hd 5/46-18x1/2” 2 2 41-1049 Pump Leg 3 1 41-2088 Oil Case, Machined 4 1 41-3753 Oil Case Window 5 1 61-2278 Drain Valve ...

Exhaust Filter Directional Exhaust Filter Large, high capacity Screw-in type 360 Swivel outlet w/tubing connector Exhaust Mist Eliminator Exhaust oil recyclers capture oil mist expelled from the pump, seperated air from oil, and return collected oil to the pump via a line connected to the gas ballast inlet. This process effectively reduces oil consumption and minimizes maintenance requirements by extending the time between oil changes. Requires gas ballast connection kit: Cat. No. 141601 - for models1400,1405,1376,1380,1402 Standard Exhaust Filter Use with pump ...

2.21 High Pressure Operation DUOSEAL two-stage pumps are designed to be most efficient when operated at or near their ultimate blanked off pressure. The pump is designed to remove air from a vacuum system at atmospheric pressure to a deep vacuum. When the pump is operated at elevated pressures up to about 10 Torr for long periods of time, the pump will run hotter. At elevated ambient temperatures under these conditions, the thermal protection switch on single phase motors may cut out. Use of an exhaust filter with coalescing element is required. Leak ...