Features : High pressure comfortably, The valve automatically opens, Excess pressure easily, Once the pressure is released, the safety valve automatically returns to the original position.
Russian Standard Carbon Steel 20# Pn16 Pn25 Pn40 Pn63 Gate Valve Standard Design  Standard Gost Face  to   Face Gost 12815-80 Flange  Standard Gost 12815-80 Testing  Standard Gost...