The present invention relates to novel polymorph of Ceftiofur sodium as a crystalline product. Control of operation of the solenoid valve moves the spool through the operating pistons and the operation link to switch the PTO selector valve. Each hole may be provided through the housing from a first side of the base to the second side of the base. This is then followed by a further set of coordinated xy motions to from the loop and bring the capillary over the second bond site.