Yield valves with open spring housing Yield valves with open spring housing prevent the pressure from exceeding a defined level. They are mainly used in connection with check valve controlled actuators. Learn more Yield valves with closed spring housing Yield valves with closed spring housing prevent the pressure from exceeding a defined level. They are mainly used in connection with check valve controlled actuators. Learn more Nitrogen-loaded yield valves Yield valves loaded with nitrogen N2 prevent the pressure from exceeding a defined level. They are used in connection with check valve controlled actuators, predominantly at the leg. Learn more Rock burst valves These valves prevent the leg pressure from exceeding a defined level in the event of a rock burst. Learn more