Unitized bonnet/base design, rugged construction and 2-ring control make the Figure 31 safety relief valve extremely dependable in terms of pop action, seat tightness and repeatability.

• 采用阀盖/基座结构，坚固耐用，双环控制，这使得型号31安全阀在弹起作用、阀座密封和重复性等方面特别稳定可靠。