Buying machine parts such as actuated pneumatic valves is not as simple as buying a book, for instance. In order to get the machinery working at optimum level, quality and precise parts are to be used. It is always advisable to source parts from authorized suppliers.
If you are looking for precision motor control products, valves and piping parts, do check out Authorized Parts, Inc. They are the “go to” guys for control, process and power products, worldwide. They supply valves; contactors, relays & transformers; actuators and pump parts.