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Elastomeric diaphragms are used in tanks for positive expulsion of Hydrazine on board spacecraft. ATK has manufactured over 1000 diaphragm tanks for space flight application, with tanks from 9" to 40" in diameter and up to 28,000 cubic inches of volume. The combination of ATK’s precision, ultra-pure diaphragms, exclusive retention mechanism, extensive girth closure welding expertise, and unmatched industry experience results in a family of ATK diaphragm tanks that represents the space industry standard.

ATK offers the most complete product line of Hydrazine positive expulsion elastomeric diaphragm tanks available in the space industry. The advantages of ATK's diaphragm tanks over other positive expulsion tanks include:

  • AFE-332 for long term Hydrazine compatibility (over 30 years demonstrated)

  • Over 100 operating expulsion cycles demonstrated

  • Reversible diaphragm with fully reversible designs qualified

 

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Shown at right is a 40 inch diameter 2/1 spheroid diaphragm tank for hydrazine, ATK P/N 80407-1. The Tank has a total volume of 28,144 cu. in. and has a 314 psig MEOP. This tank family had been supplied to numerous spacecraft  programs including TDRSS, X-38, EOS , TRMM, ETS-VII, and SOHO.

   

Shown at right is a 16.5 inch diameter spherical diaphragm tank for hydrazine, ATK's P/N 80275-1. The tank is qualified for 83 lbs (1,955 cu.in) of hydrazine at an MEOP of 435 psig. This tank family has been supplied to spacecraft programs including GPS II, Titan, Landsat, Mars 98, and many others.   

   

Shown at right is a 22 inch diameter spherical diaphragm tank for hydrazine, ATK's P/N 80200-1. This tank is similar to the ATK P/N 80298 series for storage of 160 lbs of hydrazine at 485 psig MEOP. This is ATK's most popular size of diaphragm tanks, having been supplied to numerous programs.