锻钢闸阀, 楔式闸阀

Product Overview

    This Forged Steel Cryogenic Gate Valve is a professional high-pressure gate valve specially developed for low-temperature and cryogenic service. All core pressure-bearing components are processed with professional cryogenic treatment process, matched withspecial cryogenic forged materials and customized exclusive cryogenic structure, which can maintain zero structural embrittlement and zero sealing failure in an ultra-low temperature cryogenic environment down to -196℃. It is perfectly suitable for high-pressure transmission and on-off control of various cryogenic/ultra-low temperature media such as LNG (liquefied natural gas), LOX (liquid oxygen), LIN (liquid nitrogen), and liquefied ethylene.

    Available inGB standard DN15–DN50 (ANSI standard NPS 1/2″–2″) and full pressure ratings of ANSI Class 150–Class 2500 & GB PN16–PN420, this valve strictly complies with global mainstream industrial standards for cryogenic valves including GB, ANSI/ASME and BS. As a core valve in cryogenic storage and transportation, cryogenic chemical engineering, air separation equipment and other fields, it fully meets the application requirements of various low-temperature and cryogenic high-pressure working conditions worldwide.

Core Product Features

1. Exclusive Cryogenic Treatment Process for Core Components, Eliminating Low-Temperature Embrittlement

Core pressure-bearing parts of the valve, including the valve body, stem and gate, undergo a complete professional cryogenic treatment process after forging and finishing: through ultra-low temperature cyclic cooling treatment, it completely eliminates forging stress and processing stress inside the components, optimizes the low-temperature metallographic structure of materials, and greatly improves the low-temperature impact toughness and structural stability of materials.

Parts treated with cryogenic process will not suffer from embrittlement, cracking or deformation of ordinary forged steel parts even in the extreme -196℃ cryogenic environment, ensuring the long-term durability of the valve in low-temperature service from the process root. This is the core process barrier that distinguishes cryogenic valves from ordinary high-pressure valves.

2. Customized Cryogenic Special Materials, Adaptable to Full-Temperature Cryogenic Environment

We only select special anti-freezing materials suitable for low-temperature and cryogenic service, rejecting ordinary industrial forged steel, and all core materials have passed low-temperature toughness testing: the valve body adopts special cryogenic forged steel LF2, F304L, F316L with qualified low-temperature resistance, adaptable to an ultra-wide temperature range of -196℃~+550℃.

Seals and packing are made of ultra-low temperature resistant fluorine materials and low-temperature flexible graphite, which maintain elasticity in cryogenic environment without hardening or brittle fracture, ensuring the reliability of cryogenic sealing throughout the service life, and adaptable to various flammable, explosive and corrosive cryogenic media.

3. Exclusive Cryogenic Structure Design, Fitting the Logic of Cryogenic Service

It is equipped with a standard extended cryogenic stem (long neck structure), the iconic structure of cryogenic valves, which can effectively isolate cryogenic media from the top handwheel operating mechanism, avoid frost and ice jamming of the valve stem caused by low-temperature conduction, and ensure flexible and smooth opening and closing of the valve in cryogenic environment.

At the same time, it adopts a cryogenic enhanced sealing structure, and the sealing surface is designed according to the thermal expansion and contraction characteristics of cryogenic materials. Combined with the precision of components after cryogenic treatment, it achieves zero leakage in low-temperature service, completely solving the industry pain point of sealing failure and medium leakage of ordinary valves in low-temperature environment.

4. Integral Forged Steel + Cryogenic Treatment, Dual Compliance for Low Temperature and High Pressure

The valve body is made by integral forging process, free of casting pores and sand defects. With the support of cryogenic treatment process, it has both high strength and low-temperature toughness, and can adapt to the combined working condition of low temperature + ultra-high pressure at the same time, with a maximum pressure rating of Class 2500. It operates for a long time without leakage or structural deformation in high-pressure low-temperature scenarios such as LNG refueling, cryogenic air separation and low-temperature chemical engineering.

5. Gate Type On-Off Structure, Suitable for Cryogenic Medium Flow

Adopting a lifting gate structure, the flow channel is smooth and straight with extremely low medium flow resistance, suitable for large-flow on-off control of cryogenic media such as LNG, LOX and LIN. The sealing surface is treated for wear resistance and low-temperature erosion resistance, and remains tightly sealed after long-term opening and closing with the precision after cryogenic treatment, adaptable to continuous uninterrupted operation in low-temperature service.

6. Special for Small Bore, No Attenuation of Cryogenic Performance

Specially customized for GB DN15–DN50 (ANSI NPS 1/2″–2″) small-bore low-temperature and high-pressure pipelines, with compact structure and flexible installation space. The advantages of cryogenic treatment process, cryogenic materials and cryogenic structure are fully exerted in small-bore scenarios, without the problems of cryogenic performance attenuation and sealing failure caused by reduced bore size.

7. Dual Standard Compatibility, Universal for Global Cryogenic Service

Dimensions, connection methods and pressure ratings comply with both GB and ANSI/ASME standards simultaneously. The cryogenic treatment process and cryogenic material selection are adaptable to various global cryogenic storage and transportation, air separation equipment and petrochemical cryogenic equipment systems, meeting the cryogenic valve procurement standards of domestic and overseas customers.

Application Fields

1. High-pressure small-bore pipelines for cryogenic/ultra-low temperature storage, transportation and refueling of LNG
2. High-pressure transmission systems forcryogenic service of LOX and LIN in air separation equipment
3. High-pressure pipelines for low-temperature process of ethylene and liquefied gas in petrochemical industry
4. Supporting low-temperature and high-pressure pipeline systems for energy equipment and power stations
5. Various cryogenic pipelines with extreme requirements forcryogenic treatment process, cryogenic materials and cryogenic sealing

Product Summary

This Forged Steel Cryogenic Gate Valve takes professional cryogenic treatment process as the core process support, matched with cryogenic special materials and exclusive cryogenic structure, fully adapting to various harsh low-temperature and cryogenic working conditions. Even in the ultra-low temperature environment of -196℃, it can still maintain stable structure and zero sealing leakage, perfectly solving the problems of valve embrittlement and failure in low-temperature service.

Covering full GB and ANSI specifications, this valve has strong adaptability for small bores and a maximum pressure rating of Class 2500. With mature cryogenic treatment process, outstanding cryogenic performance and reliable sealing, it is an ideal special valve for on-off control of small-bore low-temperature, cryogenic and high-pressure pipelines, and the preferred high-pressure gate valve for global cryogenic service fields.