MACH 1 Plug Valve ASME 600

The next generation of plug valve from Durco.

A pair of PFA encapsulated taper seat inserts replaces the PTFE sleeve used in the G4 series. Many unique features allow the valve to perform to a higher level than comparable plug valves.

  • Lower turning torque – Reduced actuation costs
  • High working temperature performance up to 274° C
  • Easy seat replacement with minimal tools
  • ISO 5211 actuator mounting pad

Available in a wide range of alloys to suit the process from carbon steel up to Zirconium / Hastelloy etc. As with all other Durco plug valves, the plug and be reseated whilst the valve remains inline. A live loaded reverse lip PFA diaphragm provides secondary stem sealing to keep emissions to a minimum.

The Mach 1 is available in sizes 1”NB up to 6”NB in class 150, class 300 and class 600 (derated) designs.

Top Works Drawing 1″NB – 3″NB

Top Works Drawing 4″ – 6″NB

Installation, Maintenance and General Guidance PDF

To Suit ASME 600 Flanged Piping Systems

To suit pipework NB Face – Face A CL to end of wrench B CL to top of wrench C
Inches Inches Inches Inches
1″ 8.5 7.0 4.6
1.1/2″ 9.5 9.0 5.0
2″ 11.5 12.0 6.2
3″ 14.0 20.0 6.7
4″ 17.0 29.9 9.3
6″ 22.0 46.0 10.6

Mach 1 Options:
• Fire Sealed – To API 607 minimal environmental leakage
• Marathon design for High Cycle applications
• V-Ported plugs in various trim options for precise flow control
• Connections: Flanged, socket / butt weld and threaded end


Mach 1Plug valve drg