SKF DS-W2-4-V57 Pressure Switch

The SKF DS-W2-4-V57 Pressure Switch (part number 172517) is a compact, rugged device used to monitor pressure in centralized lubrication circuits and deliver a discrete electrical signal when the preset pressure is reached, enabling automatic control of pumps, metering devices, or alarms in SKF DS lubrication systems. In the DS-W family, the W2-4 designation identifies a switch with a nominal switching pressure of 2 bar (about 29 psi), a common setting for grease and oil lubrication lines in industrial equipment. The V57 suffix denotes a specific build of this DS-W2-4 variant for compatibility with SKF central lubrication installations. Some DS-W configurations support different electrical connections, including center-connected M12×1 circular plugs for center wiring, aligning with DS-W family options that require a centralized electrical connection. When installed, the DS-W2-4-V57 continuously monitors line pressure and toggles its output at the 2 bar set point, allowing downstream components such as lubrication pumps, valves, or safety interlocks to respond promptly to pressure changes. This part is typically used in SKF centralized lubrication systems where reliable, repeatable switching at a defined pressure is critical to maintain consistent lubrication cycles and prevent under- or over-lubrication in machinery.