For ASME class 600, long-pattern Gate Valves, size range is NPS ½ ” up to NPS 36”, connections are flanges and welding ends. For class 600 short-pattern Gate Valves, size range is NPS 1” up to NPS 24”, connection is welding ends. For size of NPS 1” up to NPS 12”, there is obvious dimensional difference between long-pattern and short-pattern valves.
For ASME class 900, long-pattern Gate Valves, size range is NPS 1” up to NPS 24”, connections are flanges and welding ends. For class 900 short-pattern Gate Valves, size range is NPS 1” up to NPS 16”, connection is welding ends. There is obvious dimensional difference between long-pattern and short-pattern valves, for size of NPS 1” up to NPS 16”.
For ASME class 600, long-pattern Globe Valves, size range is NPS ½ ” up to NPS 36”, connections are flanges and welding ends. For class 600 short-pattern Globe Valves, size range is NPS 1” up to NPS 12”, connection is welding ends. For size range of NPS 1” up to NPS 12”, there is obvious dimensional difference between long-pattern and short-pattern valves.
For ASME class 900, long-pattern Globe Valves, size range is NPS ¾ ” up to NPS 24”, connections are flanges and welding ends. For class 900 short-pattern Globe Valves, size range is NPS 2 ½ ” up to NPS 16”, connection is welding ends. For size range of NPS 2 ½ ” up to NPS 16”, there is obvious dimensional difference between long-pattern and short-pattern valves.
For ASME class 600, long-pattern Globe Valves, size range is NPS ½ ” up to NPS 36”, connections are flanges and welding ends. For class 600 short-pattern Globe Valves, size range is NPS 1” up to NPS 12”, connection is welding ends. For size range of NPS 1” up to NPS 12”, there is obvious dimensional difference between long-pattern and short-pattern valves.
For ASME class 900, long-pattern Swing Check Valves, size range is NPS ¾ ” up to NPS 24”, connections are flanges and welding ends. For class 900 short-pattern Swing Check Valves, size range is NPS 2 ½ ” up to NPS 16”, connection is welding ends. For size range of NPS 2 ½ ” up to NPS 16”, there is obvious dimensional difference between long-pattern and short-pattern valves.
For ASME class 600, long-pattern Lift Check Valves, size range is NPS ½ ” up to NPS 36”, connections are flanges and welding ends. For class 600 short-pattern Globe Valves, size range is NPS 1” up to NPS 12”, connection is welding ends. For size range of NPS 1” up to NPS 12”, there is obvious dimensional difference between long-pattern and short-pattern valves. Lift Check Valve is also known as Piston Check Valve.
For ASME class 900, long-pattern Lift Check Valves, size range is NPS ¾ ” up to NPS 24”, connections are flanges and welding ends. For class 900 short-pattern Lift Check Valves, size range is NPS 2 ½ ” up to NPS 16”, connection is welding ends. For size range of NPS 2 ½ ” up to NPS 16”, there is obvious dimensional difference between long-pattern and short-pattern valves. Lift Check Valve is also known as Piston Check Valve.
For ASME class 600, long-pattern Ball Valves, size range is NPS 1” up to NPS 24”, connections are flanges and welding ends. There is no short-pattern specified for Ball Valves.
For ASME class 900, long-pattern Ball Valves, size range is NPS 1” up to NPS 24”, connections are flanges and welding ends. There is no short-pattern specified for Ball Valves.
Reference:
ASME B16.10 - Face-to-Face and End-to-End Dimensions of Valves.
Table 3 – Class 600 Steel Flanged and Buttwelding End Valves, Face-to-Face and End-to-End Dimensions.
Table 4 – Class 900 Steel Flanged and Buttwelding End Valves, Face-to-Face and End-to-End Dimensions.
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