Industrial valves · Криогенный дисковый затвор: типы, свойства и применение

Cryogenic Disc Valves: High-Tech Solutions for Extreme Temperatures

Cryogenic Disc Valves: High-Tech Solutions for Extreme Conditions

EV Group China's cryogenic disc valves represent an advanced solution for systems operating with extremely low temperatures. These specialized shut-off valves are designed to provide reliable and leak-tight closure for liquefied gas flows, including LNG, liquid nitrogen, oxygen, and argon. A key requirement for such components is maintaining structural integrity and tightness at temperatures down to -196°C and below, which is achieved through the use of innovative materials and design features.

Distinguishing Features of EV Group China Cryogenic Disc Valves

Specialized Materials: Use of cryogenic steels and alloys that prevent cold brittleness and ensure stability of mechanical properties at ultra-low temperatures.
Extended Temperature Range: Adaptation for operation with a wide range of cryoagents, maintaining operability in deep-cold conditions.
Minimization of Heat Ingress: Engineering solutions aimed at reducing heat exchange with the environment and protecting actuator mechanisms from icing, which increases energy efficiency and operational reliability.

Design and Materials

To ensure maximum performance and durability, EV Group China's cryogenic disc valves include the following elements:

Body: Made of high-strength steel with optimized geometry, designed to minimize heat transfer and ensure structural rigidity.
Disc: A precision working element capable of maintaining its geometry and functionality even under significant cryogenic compression.
Stem: Extended design that moves the control assembly beyond the extreme cooling zone, preventing freezing and ensuring ease of maintenance.
Sealing Assembly: Made of wear-resistant materials, guaranteeing a tightness class of "A" at critical temperatures, which is crucial for preventing cryoagent leaks.

EV Group China uses the following materials for the production of cryogenic disc valves, ensuring reliability under extreme loads:

Austenitic Stainless Steels (AISI 304, 316, 316L): Provide an optimal balance of ductility, strength, and corrosion resistance, making them ideal for most cryogenic applications.
Nickel Alloys (Inconel, Monel): Used in the most aggressive environments and at the lowest temperatures, where increased resistance to corrosion and mechanical stresses is required.
Alloy Structural Steels: Undergo special heat treatment to increase impact toughness and prevent brittle fracture in low-temperature conditions.
Titanium Alloys: Used to reduce the overall weight of the structure while maintaining maximum strength and corrosion resistance, which is especially important in the aerospace industry.

Mounting Methods

EV Group China offers cryogenic disc valves with various mounting options for integration into any pipeline system:

Wafer design: A compact and economical mounting method between mating pipe flanges, ideally suited for confined spaces.
Lug design: Provides a secure bolted connection, designed for high mechanical loads and vibrations, guaranteeing system stability.

EV Group China Testing Program

All EV Group China cryogenic disc valves undergo a rigorous testing program to confirm their operational characteristics:

Cryogenic Tests: Verification of valve performance when immersed in a medium at operating temperature, simulating real operating conditions.
Hydraulic and Pneumatic Tests: Control of seal tightness in accordance with international standards, confirming the absence of leaks at high and low pressures.
Functional Tests: Checking the smoothness of actuator movement and opening/closing torques, ensuring trouble-free operation throughout the service life.

Where We Apply

EV Group China's cryogenic disc valves are widely used in critically important industries where precise and reliable flow control is required at extremely low temperatures. They are indispensable in LNG infrastructure, including storage facilities, regasification terminals, and transport systems, where they ensure the safe transfer and storage of liquefied natural gas. In the aerospace industry, these valves are used in liquid fuel and oxidizer supply systems for rocket engines, where the slightest malfunction can lead to catastrophic consequences. Chemical synthesis and cryogenic medicine also rely on the high precision and tightness of our valves for working with reagents and biological samples at ultra-low temperatures. Furthermore, in the oil and gas industry, they play a key role in the transportation of liquefied hydrocarbons, ensuring the safety and efficiency of technological processes.

What to Replace With / Analogues

When it is necessary to replace EV Group China cryogenic disc valves or search for analogues, several key aspects should be considered. The main alternatives can be cryogenic ball valves or gate valves, however, each type of valve has its own characteristics. Ball valves provide full-bore shutoff and high tightness, but can be more cumbersome and expensive for large diameters. Gate valves, in turn, have lower hydraulic resistance in the fully open position, but their tightness at cryogenic temperatures may be lower, and the opening/closing time is longer. When choosing an analogue, it is critically important to ensure that the materials of the body, disc, stem, and seals comply with the required temperature range (e.g., 304L, 316L steels, as well as Inconel 625 or Monel 400 alloys). It is also necessary to verify compliance with standards such as ISO 10434, API 600, API 609 for disc valves, and the availability of certificates for cryogenic performance (e.g., BS 6364). Preference should always be given to products from verified manufacturers specializing in cryogenic valves to guarantee the safety and durability of the system.

What to Clarify with the Supplier

When ordering cryogenic disc valves from a supplier, such as EV Group China, it is necessary to clarify a number of critically important parameters to ensure full compatibility and reliability. First, request full technical specifications, including nominal diameter (DN), nominal pressure (PN), operating temperature range, and type of working medium. Be sure to clarify the materials of manufacture for all main components (body, disc, stem, seals) and their compliance with cryogenic standards. It is important to receive confirmation of successful cryogenic testing (e.g., compliance with BS 6364 or similar standards). Request quality certificates for the metal and the finished product, as well as a passport indicating the date of manufacture and warranty period. Clarify the type of connection (wafer, lug) and the corresponding flange standards (ASME B16.5, EN 1092-1). It is also necessary to find out the availability and type of actuator (manual, pneumatic, electric) and its compatibility with your control system. Do not forget to clarify delivery terms, manufacturing lead times, stock availability, and the possibility of inspection before shipment. For large projects, it is recommended to request a supplier reference list with similar deliveries.