For sale is a used OEM inlet valve assembly from a 2006 Kaeser SFC 90ST rotary screw compressor with Sigma 28 pump.  In good used shape - the compressor had approx. 45K hours when the drive went out and it was pulled from service.  This auction is for only the inlet valve assembly.  The Sigma 28 air end is not included.  It is still bolted to the air end in the pictures, the air end is not included, only the inlet valve assembly.  Other parts from this machine available - if it is not listed, contact me to see if I still have it.  I included a picture of the compressor that this came off of.  This should fit other models - please verify fitment prior to purchase.  Please see pictures and email with questions.