Even small changes in temperature, pressure, or purity can affect the yield in semiconductor manufacturing. We design each cryogenic transfer system at HL Cryogenics to provide consistent thermal performance and complete cleanliness. This is especially important for critical tools like etching, lithography, and wafer cooling systems.
Semiconductor plants in East Asia need something different from general industrial gas applications:
Very low vibration and changes in pressure
No risk of contamination
Running all the time, 24 hours a day, 7 days a week
This makes system design much stricter than it is for most LNG infrastructure or bulk industrial gas plants.
A typical system consists of:
- Mini Tank or bulk storage as the cryogen source
- Main distribution via Vacuum Insulated Pipe
- Flexible connections using Vacuum Insulated Flexible Hose
- Control components such as Vacuum Insulated Valve
- Phase management via Vacuum Insulated Phase Separator
Each component must be engineered as part of a fully integrated system to ensure stable operation.
Table of Contents
1. Engineering Principle: Heat Leak Reduction
2. Vacuum Stability and Long-Term Performance
3. Pressure Design and Flow Stability
4. Compliance with International Standards
● Engineering Principle: Heat Leak Reduction
The main goal of any liquid nitrogen system is to keep heat from getting in. Heat moves through:
Conduction through pipe supports and materials
Radiation between the walls of the inner and outer pipes
Gas convection that is left over in the vacuum space
Our Vacuum Insulated Pipe systems at HL Cryogenics are made to create very high vacuum levels (10⁻⁴ to 10⁻⁶ mbar), which greatly slows down these ways of transferring heat.
The end result is:
Lower rates of boil-off
Stable pressure levels
Better efficiency for the whole system
Valve with Vacuum Insulation
The Vacuum Insulated Valve makes sure that:
Little heat gets into control points
Reliable separation in very cold conditions
Long life with less upkeep
During operation and maintenance cycles, these valves are necessary to keep the system in good shape.
● Vacuum Stability and Long-Term Performance
By combining our Dynamic Vacuum Pump System, Vacuum Insulated Valve, and Phase Separator, we give you a setup that moves liquid helium efficiently and keeps costs down. Our Mini Tanks and Flexible Hoses let us handle both mobile and fixed jobs with precision.
Keeping a vacuum over time is a big problem for cryogenic systems. Micro-leaks and material outgassing cause traditional static vacuum systems to break down.
Our Dynamic Vacuum Pump System fixes this by:
Always keeping an eye on the vacuum levels
Restoring vacuum conditions on a regular basis
Stopping performance from getting worse
This makes sure that vacuum insulation works the same way over long periods of time, which is important for semiconductor fabs that need reliability without shutting down for years at a time.
Phase Separator with Vacuum Insulation
The Vacuum Insulated Phase Separator is very important for:
Getting vapor out of liquid nitrogen
Stopping gas from getting to sensitive equipment
Keeping the pressure and temperature steady downstream
This is especially important for semiconductor tools, where even tiny gas bubbles can mess up processes.
Flexible Hose with Vacuum Insulation
The Vacuum Insulated Flexible Hose gives you:
Mechanical flexibility for connecting equipment
Isolating vibrations
Kept insulation performance
Properly designed cryogenic hose systems keep rigid piping from getting stressed out and make it more reliable in high-precision settings.
● Pressure Design and Flow Stability&Material Selection and Cleanliness
For semiconductor applications, keeping the pressure stable is just as important as keeping the temperature stable. Some common system parameters are:
Pressure at work: 6–10 bar
Pressure for design: 16 to 25 bar
Flow conditions: very different based on how much the tool is needed
Changes in pressure can lead to:
Phase instability (the change from liquid to gas)
Inconsistency in the process
Equipment not working
To fix this, we carefully size the cryogenic pipe network and add Vacuum Insulated Phase Separator units to keep the flow steady and the delivery of liquid phase.
Choosing the right materials is very important for both performance and keeping things clean. We usually use:
Inner pipes made of stainless steel (for example, SS304/316L)
Materials with low thermal conductivity for supports
Multilayer insulation (MLI) with a high reflectivity
All HL Cryogenics systems go through strict cleaning processes to meet semiconductor-grade purity standards, which gets rid of the risk of particle contamination.
● Compliance with International Standards
To ensure global acceptance and procurement confidence, we design systems in compliance with:
- ASME B31.3
- DIN EN 13480
- ISO standards for cryogenic equipment
This is particularly important for projects in:
- Semiconductor facilities in East Asia
- Industrial gas plants in Europe
- High-tech manufacturing hubs in Southeast Asia
During our last job in Taiwan for an electronics manufacturer, we installed a full-scale system for liquid nitrogen by applying Vacuum Insulated Pipe, Vacuum Insulated Flexible Hose, and the Dynamic Vacuum Pump System.
The main issues that had to be tackled were as follows:
Distant supply route (>500 meters long)
Demand for stable pressure (within ±0.2 bar variance)
Non-stop operation
The results delivered through our system:
More than 95% heat loss reduction vs traditional pipelines
Liquid flow without phase change
Continuous operation for 18 months with maintained vacuum conditions
● FAQS
Since 1992, HL Cryogenics has specialized in the design and manufacturing of high-vacuum insulated cryogenic piping systems and related support equipment, tailored to meet diverse customer needs. We hold ASME, CE, and ISO 9001 certifications, and have provided products and services to many well-known international enterprises. Our team is sincere, responsible, and committed to excellence in every project we undertake.
Vacuum Insulated/Jacketed Pipe
Vacuum Insulated/Jacketed Flexible Hose
Phase Separator / Vapor Vent
Vacuum Insulated (Pneumatic) Shut-off Valve
Vacuum Insulated Check Valve
Vacuum Insulated Regulating Valve
Vacuum Insulated Connectors for Cold Boxes & Containers
MBE Liquid Nitrogen Cooling Systems
Other cryogenic support equipment related to VI piping — including but not limited to safety relief valve groups, liquid level gauges, thermometers, pressure gauges, vacuum gauges, and electric control boxes.
We are happy to accommodate orders of any size — from single units to large-scale projects.
HL Cryogenics' Vacuum Insulated Pipe (VIP) is manufactured in accordance with the ASME B31.3 Pressure Piping Code as our standard.
HL Cryogenics is a specialized vacuum equipment manufacturer, sourcing all raw materials exclusively from qualified suppliers. We can procure materials that meet specific standards and requirements as requested by customers. Our typical material selection includes ASTM/ASME 300 Series Stainless Steel with surface treatments such as acid pickling, mechanical polishing, bright annealing, and electro polishing.
The size and design pressure of the inner pipe are determined according to the customer's requirements. The size of the outer pipe follows HL Cryogenics' standard specifications, unless otherwise specified by the customer.
Compared with conventional piping insulation, the static vacuum system provides superior thermal insulation, reducing gasification losses for customers. It is also more cost-effective than a dynamic VI system, lowering the initial investment required for projects.
● Related Posts
Post time: Apr-13-2026
