14 A A N A L Y T I C A L C H E M I S T R Y

A.H.T. CO. SPECIFICATION

GAST PORTABLE

R O T A R Y P U M P

• For vacuum or pressure

• Capacity: Ί.3 cu. ft. per minute

1032-A.

ROTARY AIR BLAST AND SUCTION APPARATUS, Gast Portable, A . H . T . Co. Specification. A quiet, air cooled, motor driven unit complete with vacuum and pressure gauges ; suitable for intermittent operation at pressures not exceeding 25 lbs., or vacuums not exceeding 27 inches of mercury. A thermal overload circuit breaker is supplied on pumps for use on alternating current.

Consisting of a pump with cast iron rotor fitted with four composition vanes revolving in a precision machined housing of special alloy iron which is connected directly to a J4 h.p. 1725 r.p.m. motor. The pump rotor is an extension of, and integral with, the shaft of the motor. The complete apparatus is mounted on four rubber feet and is equipped with carrying handle, and with air filters and oil trap attached directly behind the tapered rubber tubing connections at the inlet and outlet, dial type vacuum gauge 2 inches diameter graduated from 0 to 30 inches of mercury in intervals of 1 inch, pressure gauge 2 inches diameter graduated from 0 to '30 lbs. in intervals of 1 lb., and needle valves for precise regulation of the pressure and vacuum to the requirements of the work intended within the limits described below.

The combined filter, muffler and trap on the pressure side consists of a heavy glass bowl with porous stone filter element which does not require replacement and is easily accessible for cleaning by loosening the yoke and thumb nut fitting around the bottom of the bowl. The filter on the vacuum side is a combined oiling and air filtering device. It is enclosed in a screw neck glass reser­voir in which the oil level can be observed at all times.

For intermittent use the pump can be operated up to 25 lbs. pressure, but, for extended periods, the maximum pressure must not exceed 15 lbs.

1032-A. Rotary Air Blast and Suction Apparatus, Gast Portable, Α. Η. Τ. Co. Specification, as above described, complete with pressure and vacuum gauges and thermal overload circuit breaker, fillers, carrying handle and 10 ft. of cord with sua]) switch and plug. Wit h 34 h.p. motor, current consumption 4 amperes, for 115 volts, 60 cycles, a.c 63.25

1032-C. Ditto, but with }/i, h.p. motor and thermal overload circuit breaker, current consumption 2.7 amperes, for 230 volts, 60 cycles, a.c 69.00

Capacity, cu. ft. of free air per minute (atmospheric pressure) 1.3

Cu. ft. of free air at 25 lbs. pressure (for 10 minute periods) 0.95

Maximum vacuum, inches of m e r c u r y . . . . 27 Maximum pressure, lbs 15 Speed, r.p.m 1725 Current consumption on 115 volts, amperes 4 Number of blast lamps (M.I.T. or equal) 4 Floor space, inches 15 X 6J^ Net weight, lbs 34

ARTHUR H. THOMAS COMPANY

WEST WASHINGTON SQUARE PHILADELPHIA 5. PA.

Teletype Services: Western Union WUX and Bell System PH-72

Laboratory Apparatus and Reagents