this embodiment a kier or expansion tank 32 is shown with a cylindrical central portion 34 having an upper rim 36 and a lower rim 38 within the kier a carrier 41 for supporting yarn packages 44 in spool or tube form is situated and conventionally held in place by a ram 43 of a pneumatic piston cylinder mechanism 45 mounted to the lid 50 and acting on the central standard 47 of the carrier 41 the device includes a carrier manifold 40 that has a series of perforated spindles 42 upon which tubes of yarn packages 44 are placed a removable circular lid portion 46 is secured to the upper rim 36 of the central portion 34 when in operation the lid 46 should be secured to the upper rim in a fluid tight relation by a locking band 55 the lid portion 46 has a top side 48 and a bottom side 50 with the bottom side being relatively flat and facing towards the central portion 34 to reduce the fill volume as compared to conventional disk shaped lids the kier or expansion tank also has a circular lower portion 52 secured to the lower rim 38 of the central portion 34 with the bottom of the lower portion 52 having an inner facing surface 54 and an outer facing surface 56 the inner facing surface 54 is formed to complement the underside of the carrier manifold 40 thus since the bottom surface 50 of the lid portion 46 and the inner facing surface 54 of the lower portion 52 are formed to complement the carrier of yarn packages less treating liquor is needed to fill the pressure.