Cryogenic butterfly valve

Specification

Valve size: NPS2 ~ NPS24 DN50 ~ DN600

Pressure rating: 150LB ~ 300LB, PN10 ~ PN64

Material: LCB, LC1, LC2, LC3, LC9, CA6NM, CF8, CF8M

Design and manufacturing standards: GBT 24925, API 609, GB/T 12238, JB/T 8527, EN 593

Face to face standards: ASME B 16.10, API 609, GB/T 12221, EN 558

End standard: Any standard can be set as required, the connection can be flange, butt weld, clip, lug

Stress test standards: GB/T 13927, API 598, BS EN 12266 -1

Quality / Product Certification: ISO 9001, API 6D, PED 2014/68/EU, EAC, ATEX and OSHAS 18001

Safety and reliability: in line with SIL3

Optional valve actuators: polished rods, gears, handles, pneumatic actuators, hydraulic actuators, gas actuators,

Gas oil actuator, electric actuator, hydraulic/electric actuator, hydraulic actuator

Sealing grade: API 598 (zero leak), grade six (FCI 70-2), ISO 5208 grade A

Characteristics

Drip board (insulation board): The drip board can prevent condensed water vapor from flowing into the heat insulation area, and it can more effectively ensure the working environment of the packing, thus avoiding adverse effects.

The pressure sleeve and the lower flange have dual blowout prevention functions.

For all valve parts with a temperature less than -100 °C, cryogenic treatment according to relevant regulations to prevent low-temperature brittleness of materials and volume change caused by material phase transformation at low temperatures.

The long neck structure is adopted to make the working temperature of the packing above 0 °C, which effectively prevents the sealing property from being lowered due to the working temperature being too low, and even the sealing failure, and at the same time, it is convenient to wrap the insulating material with the valve to prevent the loss of cold energy. When the temperature is lower than -100 °C, the stem material is chrome-plated or nitrided to improve the surface hardness of the stem and improve the reliability of the filler.

The gasket used has reliable sealing and recovery at normal temperature, under low temperature conditions and temperature changes.

Double-layer stem packing and pressure butterfly type shrapnel device are adopted.