Series Figure 10 High Capacity Iron Cast Safety Valves are ASME Section IV safety relief valves designed for industrial and commercial low-pressure steam heating boilers and associated equipment. Standard pressure settings for saturated steam service are 5 thru 15psi. The Figure 10 valve features tight shutoff, sharp popping and closing action, and a high degree of repeatability. The valve inlet and body are one integral casting assuring proper alignment of disc, seat, and spindle for smooth action. The disc is located by a disc guide which in turn is held in place by a zinc-plated wave spring. The entire assembly is contained by a combination bonnet/compression screw. The simplicity of the design makes these valves more economical and contributes to their dependability.