Products / Air separation

Cryogenic air separation units

A cryogenic air separation unit separates atmospheric air into oxygen, nitrogen and argon by compressing, purifying and cooling air to about −173 °C, then separating the components in a double-column distillation system. Haishou designs, manufactures, cold-tests and commissions customised ASUs from 200 to 5,0000 Nm³/h.

200 – 5,0000 Nm³/h

Plant capacity range

−173 °C

Distillation temperature

O₂ · N₂ · Ar

Products recovered

Turnkey EPC

Or on-site gas supply

What we engineer

Built around your gas demand

Every ASU we build starts from the realities of the site: feed conditions, gas demand, operating hours, liquid backup and future capacity. Process configuration, equipment selection and performance targets follow from that brief — not from a standard catalogue.

Scope of supply

One supplier, complete scope

Air compression, pre-cooling and molecular sieve purification

Cold box with main heat exchanger and turbo expander refrigeration

Double-column distillation with oxygen, nitrogen and argon circuits

Product compression, cryogenic storage and vaporisation

DCS control, safety interlocks and operator training

Installation supervision, cold commissioning and performance testing

START WITH YOUR PROCESS

Tell us what your plant needs to produce.

Share your flow, purity and site conditions. Our engineers will help define the right plant configuration.