| Turbomachinery is essential to the success of any cryogenic process. CryoMachinery's radial inflow turboexpanders provide refrigeration for some of the most efficient air separation and liquefaction facilities in the world. At CryoMachinery, we have been dedicated to providing high value and reliable expansion and compression products for over 40 years. High value is the result of world-class efficiency and low-cost designs that are delivered to our customers on time. Reliability results from proven designs which are easy to operate and maintain. Because we are part of a company that builds and operates its own process plants, we understand the expectations of customers who operate their own facilities. CryoMachinery is ready to solve your next cryogenic equipment need. |
ETAC-7R turboexpander assembly
(compressor end to the left) |
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High-pressure turboexpanders, usually installed in pairs, are typically used to provide refrigeration for the production of cryogenic liquids. The expander extracts work from a high-pressure gas stream providing refrigeration to the process. The work removed from the gas stream by the expander is used to provide compression power to cycle. These applications demand high efficiency and reliability at a low installed cost. The efficiency of the turboexpander has a significant impact on the cost of the cryogenic liquid produced.
CryoMachinery's family of process compressor-loaded expanders is ideal for applications where power and capital cost are evaluated highly. Advanced design tools and capabilities, combined with streamlined project management processes, allow for the best match between efficiency and capital investment.
CryoMachinery high-pressure expanders are reliable, efficient and low-cost. In plants where specific power is of utmost importance, CryoMachinery delivers. Our efficiencies are at the leading edge of technology, guaranteed to 91.5% in some applications. Designed for high-pressure service, our expanders will accommodate a wide range of flow, pressure ratios, and cryogenic gases, ensuring unsurpassed performance.
- Low capital and installed costs
- Designed for ease of operation and maintenance
- High-efficiency expanders—some applications in excess of 91.5%
- Energy recovery through high efficiency compression
- Low seal gas consumption
- High refrigeration load capacity
- Proven equipment reliability
- Responsive support
- Quality Management System—ISO 9001 certified
- Complete documentation package
- Easily customized modular designs
High Thermodynamic Efficiency
- Volute housings for compressors and expanders
- Zero bypass nozzle mechanism
- Close clearance abradable labyrinth seals
- Low parasitic loss bearing designs
- 3-dimensional computation fluid dynamic analysis of aerodynamic surfaces and contours
- Warm and cryogenic shop testing available
- Closed and open impeller designs
- Adjustable/remote controlled inlet nozzle vanes for peak efficiency over wide operating conditions
- Proprietary expander diffuser design for maximum pressure recovery
- Tilt pad radial bearings for stable operation
- Tilt pad thrust bearings for high load capacity
- Stiff shaft rotor design
- Wear-resistant coatings in flow passages
- Complete shop mechanical performance test
- "Plug-in" design for rapid serviceability
- Finite element analysis (FEA) of complex geometries for accurate prediction of stresses, heat transfer, and natural frequencies
| Power |
Up to 3000HP (2240 KW) |
| Expander Inlet Temperature |
+200 to –300°F (+93 to –185°C) |
| Pressure Containing Housing (MAWP) |
to 1400 PSIG (98.5 kg/cm²g) |
| Expander Impeller Sizes |
3–10 inches (75–255 mm) diameter
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| Impeller Styles |
Open and closed impellersavailable |
| Impeller Manufacture |
Machined from rugged, single-piece castings or milled from forged stock available |
- Expander Performance
- Isentropic Efficiency in excess of 91.5%
- Performance Envelope
The chart below shows the performance envelope for the ETAC-5RD (Expansion Turbine Adjustable Nozzles Compressor Loaded), ETAC-7RE, ETAC-8RE and ETAC-9RE high-pressure turboexpanders based on the process available energy (DHs in Btu/lbm) and the actual volumetric flow at the discharge (Q2 in acfm).
- Process Compressor Performance
- Isentropic Efficiency is guaranteed to 86%
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CryoMachinery high-pressure turboexpanders are available in configurations ranging from stand-alone expanders to fully skidded packages, including seal gas and lubrication systems. Our intimate knowledge of the air separation industry guided us toward the development of standard installation packages with a broad range of options to meet the ever-increasing demands of the dynamic global marketplace. The full range of options available allows for customization of the installation package without compromising cost or schedule. Packages can be customized to include features to meet the most rigorous demands.
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Skid mounted ETAC-7R turboexpanders
with lubrication and seal gas systems |
- Fully skidded packages, including seal gas and lubrication systems
- Fully installed and prewired process and accessory instrumentation
- Coast-down lube oil accumulator
- Lube oil reservoir vent mist eliminator
- Stainless steel lube oil and seal gas piping downstream of filters
- Emergency oil shutoff valve to prevent contamination of the process gas.
- Speed and vibration monitoring
- European Machinery Directive Compliance available
- Optional dual lube oil filters and pump arrangements
- Optional programmable logic controller (PLC)-based control panel
- Optional sound control enclosures
- Optional bearing temperature monitoring
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