Rotary type quick closing return valve is suitable for nominal pressure PN1.0MPa ~ 42.0MPa, Class150-2500. Rotary type quick closing return valve is suitable for nominal pressure PN1.0MPa ~ 42.0MPa, Class150-2500. DN15 ~ 1200mm, NPS1/2 ~ 48 A tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ tɛmɛ Në luɔɔi de kä juëc ye kek looi (WCB, CF8(M), CF3(M), 1Gr5Mo, 15CrMo1V), valves ye kek tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka t Valve ye tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈u ka tɔ̈ɔ̈ Rotary type quick closing back valve adopts a built-in rocker arm rotary type structure, valve open and close parts are all installed in the valve body, not penetrating the valve body, except for the central flange part with sealing gasket and sealing ring except for the central flange part with sealing gasket and sealing ring except for the central flange part with sealing gasket and sealing ring except for the central flange part with sealing gasket and sealing ring except for the central flange part with sealing gasket and sealing ring except for the central flange part with sealing Rotary stop valve rocker arm and valve connection uses a spherical connection structure, so that the valve has a certain degree of freedom in 360 degrees range, with a suitable trace position compensation. Rotary stop valve rocker arm and valve connection uses a spherical connection structure, so that the valve has a certain degree of freedom in 360 degrees range, with a suitable trace position compensation.