Hangyang Turbomachinery: main-air and oxygen process interfaces

HANGYANG TURBOMACHINERY · CENTRIFUGAL EQUIPMENT

Place the compressor at the right point in the air-separation process

杭州杭氧透平机械有限公司 designs and manufactures centrifugal air, oxygen, nitrogen and industrial-gas machinery in Hangzhou. Hangyang’s 2025 annual report lists this legal entity as a directly 100%-owned subsidiary. It is distinct from the group’s reciprocating-compressor company in Lin’an.

The gas composition, suction state and process position decide the proposal. These engineered packages are not a complete air-separation plant; its output capacity and the compressor’s own inlet flow are different quantities.

FOUR STAGES · THREE INTERSTAGE COOLING STEPS

Main-air selection starts with a duty map and cooling conditions

Single-shaft isothermal family

Impellers and cooling

Three-dimensional impellers and external composite-tube gas coolers

Flow regulation

First-stage inlet guide vanes

Drive selection

Electric motor or steam turbine

Published application scale

ASU below 40,000 Nm³/h capacity — this is not the compressor inlet-air flow

Interstage heat removal brings compression closer to isothermal operation, according to Hangyang. The name does not establish constant temperature throughout the train or a measured saving for an offered installation.

Main-air performance and package questions →

EXTERNAL-COMPRESSION ASU OXYGEN SERVICE

Select the oxygen train by calculation, then define its safeguards

The chart does not explicitly define gauge versus absolute pressure. Its seven flow-axis ticks span 6–100 ×10³ Nm³/h beneath six model columns; they cannot be assigned as exact capacities to six machines. Hangyang states that calculation determines the actual type. Request a selected duty point and operating map.

Agree the oxygen boundary

Hangyang describes multi-cavity differential-pressure seals, oxygen-contact materials, gas-velocity and temperature limits, safety controls and anti-surge protection. Define the actual package’s equipment and responsibilities in the technical agreement.

• Oxygen purity/composition, inlet temperature and pressure, reference flow and turndown, delivery pressure and contamination limits.
• Material and oxygen-cleanliness records, sealing-gas supply, vents and process interfaces.
• Protective trips, anti-surge controls and the agreed conditions for machine acceptance.

Oxygen family and selected-machine requirements →

PUBLISHED WORKSHOP CAPABILITY → ORDER-LINKED RECORDS

Turn the manufacturing evidence into an acceptance schedule

The equipment pages show CNC gantry boring/milling, five-axis machining, high-speed dynamic balancing, an impeller overspeed tester and vacuum brazing. The quality page shows an oxygen-compressor factory test and test positions. These are published capabilities; the ordered rotor and machine still need their own agreed reports.

1. Technical scope: selected duty and off-design range, drive/auxiliaries, process connections, foundation/lifting and removal clearances, utilities and control/interlock schedules.
2. Test acceptance: model/serial-linked rotor balance, impeller overspeed and assembled-machine reports where agreed; performance conditions, vibration/temperature criteria and purchaser witness points.
3. Plant handover: operating/maintenance manuals, commissioning responsibility, training, wear-parts lists, destination attendance and warranty commencement/exclusions.