Profile: Ningbo SM-Machinery Co., Ltd is a manufacturer of pneumatic and hydraulic components. Our main products include solenoid valves, air filters, air regulators, air lubricators, cylinders, pneumatic fittings and mufflers. We are an ISO 9001 certified company. Our pneumatic cylinders are the final components in a pneumatic or compressed air control or power system. They are used to push, pull, lift and open/close doors in material handling and processing. They can also hold, remove and position materials or pieces for manufacturing. Our stainless steel cylinders are air cylinders that are constructed from stainless steel. Our miniature air cylinders operate in reverse motion and offer a range of interchangeable mounting brackets that can be attached to the cylinder ends to provide versatility and adaptability. Our solenoid valves and solenoid water valves are electrically operated devices that control the flow of liquids. They are electro-mechanical devices that use a wire coil and a movable plunger called a solenoid, to control a particular valve.