Series K815 ASME Class 150, K830 ASME Class 300, and K860 ASME Class 600 Wafer-Sphere high- performance butterfly valves are designed to meet the severe conditions of cryogenic services such as air separation and LNG. They have been proven to provide superior performance and reliability in a wide range of applications, and offer a low cost of ownership.

Cryogenic Wafer-Sphere valves are suitable for temperatures as low as -320°F (-196°C). Also available are valves prepared for oxygen service. The following standard sizes are available:

K815W (Class 150 Wafer-Body Design) 3”–30” (DN 80–750)
K815L (Class 150 Single-Flange Design) 3”–30” (DN 80–750)
K818W (CE Marked Class 150 Wafer-Body Design) 3”–30” (DN 80–750)
K818L (CE Marked Class 150 Single Flange Design) 3”–30” (DN 80–750)
K830W (Class 300 Wafer-Body Design) 3”–24” (DN 80–600)
K830L (Class 300 Single-Flange Design) 3”–24” (DN 80–600)
K838W (CE Marked Class 300 Wafer-Body Design) 3”–24” (DN 80–600)
K838L (CE Marked Class 300 Single Flange Design) 3”–24” (DN 80–600)
K860W (Class 600 Wafer-Body Design) 3”–12” (DN 80–300)
K860L (Class 600 Single Flange Design) 3”–12” (DN 80–300)
K868W (CE Marked Class 600 Wafer-Body Design) 3”–12” (DN 80–300)
K868L (CE Marked Class 600 Single Flange Design) 3”–12” (DN 80–300)

Field-proven flexible-lip seat design

• Tight shut-off in either direction. Contact Valmet for shut-off performance details.
• Composite seat in 3” – 12” (DN 80 – 300), K815, K830 and all K860 valves with metal carrier and PTFE or PCTFE insert, assures tight sealing over a wide range of pressures and temperatures.
• Single-Piece PCTFE seat in 14” (DN 350) and larger K815 and K830 valves is designed with a unique flexible lip for positive, long-lasting shutoff.

Variety of extension lengths available

Bonnet extensions available in varied lengths to suit specific service requirements

Compact body design

Allows rapid cooling to cryogenic temperatures.

Eccentric disc and offset shaft

• No seat/disc contact in the open or intermediate position.
• Eliminates wear points at top and bottom of seats for higher cycle life.
• Reduces torque requirements, allowing for smaller operators.

Easy maintenance

Simply remove body insert and replace seat – disassembly of disc and shaft is not required.

Single source responsibility

• Valves, actuators, and accessories from one source with accessories fully mounted.
• Available with electric, manual gear, and pneumatic double- acting or spring-return actuators and a variety of accessories including limit switches and solenoids.

CE marked versions available

CE marked and documented valves that conform to the European Pressure Equipment Directive (PED) 2014/68/EU are available in ASME Class 150/300/600. Operating torques, construction options and valve dimensions are exactly the same as the standard ASME 150/300/600 offering. The applicable sizes for CE marked values are shown in table to left.