These liquid relief valves feature an adjustable design to relieve liquid pressure above a given setting. They are developed for use wherever excessive pressure may damage a system or its components. These valves also feature a space saving in-line design, a retaining ring to avoid the adjusting screw from being too far removed, and a strong metal-to-metal seal. No chattering or screaming, just effective valves for use with oil, water, and steam. Relief valves are specifically developed to diminish pressure if/when pressure gets past a set level. The importance of this cannot be overstated! Properly utilizing relief valves = avoiding harm to both equipment AND users.