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By certification 
Valve Design: MASS SP-67 for Casting steel, API609+ANSI B16.1 for DI/CI
Flange: ANSI B16.1 Class 125, DIN2501 PN10/16; BS4504 PN 10/16
Face to face: BS EN 558-1; the length in BS EN 558-1 is the same in DIN3202/API609/MSS SP-67:2002.
Pressure test conform to API598.
Suitable Medium: water、sewage、sea water、air、foodstuff、oil etc.
Working temperature:-10 to 150 degrees Celsius.
Suitable for handles (DN50---300), Gear Operators, electric and pneumatic control actuators;
Flange: ANSI B16.1 Class 125, DIN2501 PN10/16; BS4504 PN 10/16
Face to face: BS EN 558-1; the length in BS EN 558-1 is the same in DIN3202/API609/MSS SP-67:2002.
Pressure test conform to API598.
Suitable Medium: water、sewage、sea water、air、foodstuff、oil etc.
Working temperature:-10 to 150 degrees Celsius.
Suitable for handles (DN50---300), Gear Operators, electric and pneumatic control actuators;
