SMC XTO-2571-02 Solenoid Valve

SMC XTO-2571-02 is a pilot-operated check valve in the XTO series that provides unidirectional flow control in pneumatic circuits and uses a pilot signal to open the valve. This model handles compressed air, with a proof pressure of 1.5 MPa and a maximum operating pressure of 1 MPa, and requires a pilot pressure in the range of 0.2 to 1 MPa to function. It supports an operating ambient/ fluid temperature range of -5 to 60°C and features an effective area of 6 mm². The ports are Rc1/4 and Rc3/8, and the body size (outside) is φ52 mm, reflecting its compact footprint. The XTO-2571-02 is part of SMC's pilot-check family, designed to prevent backflow while enabling controlled actuation via the pilot line, making it suitable for compact automation layouts where space is at a premium and a reliable check function is needed. This model is one of several XTO configurations, with the 02 designation indicating the smaller flow area relative to other variants such as XTO-2571-03, but all sharing the core pilot-check valve concept and air compatibility.