Don Wolf & Associates, Inc. is an experienced applications engineering firm for a wide variety of components-for-automation needs. We supply everything from the simplest single solenoid valve to fully-tested subassemblies for your production equipment requirements. Our products are used to control a variety of fluids, from compressed air to the harshest of liquids (including cryogenic fluids). Download Flow Calculations. Click below the image gallery to see the solenoid valve details.