Product description

Cryogenic Butterfly Valve

Model

DD343H-Cryogenic Butterfly Valve

Nominal diameter

2″～48″

Nominal diameter

-196℃～340℃

Nominal pressure

CLASS 150～900 （PN20～PN150）

Material

Main material: A351 CF8, CF8M, CF3, CF3M; A352 LCB, LCC, etc.

Design standard

API 609, ASME B16.34, BS 6364

Structural length

ASME B16.10, GB/T 12221, API 609

Connecting end

ASME B16.5, ASME B16.47, ASME B16.25, GB/T 9113

Test standard

API 598, ISO 5208, GB/T 26480, GB/T 13927, BS 6364, GB/T24925

Operation method

Handle, worm, motor-drive unit, pneumatic drive unit

Application fields

Low temperature industries such as LNG, LPG, LEG, air separation, etc.

Technical characteristics

The extension dimensions of valve stem and bonnet may vary according to different temperature ratings.

The main parts subject to a temperature ≤-101℃ are subzero treated to prevent valve deformation under ultra-low temperatures.

The sealing faces of valve seat and valve clack are build-up welded with hard alloy to improve the erosion resistance and extend the service life of valve.

Compact structure, easy installation and disassembly, repair friendly and light weight

It has a certain adjustment capability, and can be used as a control valve.

Good sealing performance of zero leakage

The sealing faces of valve seat and valve clack are build-up welded with hard alloy to improve the erosion resistance and extend the service life of valve.

Blow-off prevention design to ensure the operation safety

Drain board design to effectively prevent inflow of condensate to insulation layer

Low leakage packing is used for valve stem sealing to meet the requirement for low leakage.