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Sigma-Tek Dry Air Pump

The Sigma-Tek 1U128-006 is a pump which carries a warranty for 2-years or 1000 hours. It uses an aluminium rotor and rotor housing, making the pump very resistant to damage from ingestion of foreign objects, excessive loads or engine oil. It provides clean, dry air for operation of air driven instruments in aircraft operating at medium altitudes. Pump rotates clockwise or counter clockwise in vacuum or pressure mode. May be mounted in either a vertical or horizontal position. FAA approved as a direct replacement for all instrument pumps but is not intended for supplying air to de-icing boots. Mounting gasket furnished. Install suction regulator in line to instruments. Delivers 6 In. Hg vacuum (2.9-8.5 minimum CEM) or 6 In. Hg pressure (3.7-8.5 minimum CEM) from 1500 to 4000 RPM. No core charge.

  • Height: 3.825" ± .03" 
  • Width: 3.55" ± .03" 
  • Depth: 3.91" ± .06" 
  • Weight: 2.2 lbs. (max)
  • Engine Pad: AND 20000 
  • Rotation: Bi-directional 
  • Overhang Moment: 5.2 in-lbs 
  • Static Coupling
  • Shear Torque: 175 in-lbs (max)

Installation 

  • Port Threads: 3/8" x 18 N.P.T. 
  • Hose Fittings: 1/2" I.D. (min) 
  • Hose / Tubing: 5/8" I.D. (min) 
  • Inlet Filter: 0.3 microns

Environmental 

  • Ambient Temperature: -40° C to 93° C (typ.) 
  • Exhaust Temp. (Intermittent): 375° F for 5 mins. (max) 
  • Exhaust Temp. (Continuous): 300° F 
  • Vibration:CPS: 5 to 150
  • Maximum Double Amplitude: 0.100 in.
  • Maximum Acceleration: 10 G's 
  • Humidity (Dewpoint): -70° C 
  • Altitude: -1,000 to 30,000 ft.

Stocking, processing
and delivering aerospace parts

Hello and welcome to our website. Contained within these pages is most of the information found in our printed catalogue, all available to order online! In addition you can search our entire inventory of over 125,000 part numbers.

Stock and pricing of all parts listed on this site is live, all prices exclude VAT and shipping. All orders are subject to our standard terms and conditions.

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Quality products
and easy ordering

All our stock is available for next day delivery. In addition we have distributorships for Aircraft Tool Supply, LP Aero Plastics, Falcon Gauge, Ceconite / Randolph and Shield Technology to name but a few!

We are also the UK and European distributor for Aircraft Spruce and Speciality, with whom we have been doing business with for over 25 years.

Should you ever need any further information then our experienced sales team are just a phone call or email away and will happily answer any questions you may have.