The Maverick butterfly valve for cryogenic service is designed for tight shut off and throttling service. The disc movement is Triple offset .This eliminates concentrated wear points on the sealing ring and extends it’s lifetime. Standard body patterns are flanged and butt welded types.
Butt welded type has extended body to prevent heat conduction to the sealing area during welding installation.
An inspection door on top of the body enables easy inspection, maintenance and replacement of inner parts without the need to remove the valve or to cut the pipe.
To prevent internal stress in the bonnet during the cool-down period, all bonnet joints are bolted. This bonnet is extended to ensure that the gland area remains free from freezing even for temperatures down to -196˚C.
The valve can be installed with the shaft in any direction. The topflange drilling is according to ISO 5211 standards to fit a large range of gears and actuators.
The Triple off-set Geometry
Offset 1 : The shaft is offset behind the seat axis to allow complete sealing contact arount the entire seat.
Offset 2 : The shaft centerline is offset from the pipe and valve which provide interference free opening and closing of the Valve.
Offset 3 : The seat cone axis is offset from the shaft centerline to eliminate friction during closing and opening and to achieve uniform compressive sealing around the entire seat.
Sizes: 6″ up to 72″ (Design types: Side Entry and Double Flange)
Pressure: 150 LBS up to 600 LBS
Temperature: Down to -196ºC
Standards: API609, Cryogenic Service bonnet length as per BS6364 & MESC SPE 77/200, Fire Safe certificate as per API 607, Shell and Seat testing procedure as per API 598
Materials : CF3, CF3M, CF8, CF8C, CF8M, CK-3MCUN
Soft Seat in PCTFE material
Metallic Laminar Seat (Steel & Graphite)
Packing (Graphite, PTFE or as per client specifications)
Operator : Actuator, Gearbox
End connections: RF, BW
Industries and applications: Natural Gas Processing, Petrochemical, Chemical & Power
DEVELOPED FOR USE IN LNG SYSTEMS
TRIPLE OR DOUBLE OFFSET DESIGN TO REDUCE WEAR ON SEAT