Gas Delivery, Sampling and Distribution Subsystems

A gas delivery subsystem is the hardware between the gas source and the point that uses it: the manifolds, stream switching, sampling assemblies, blending and purification that get gas to a tool or an analyzer at the right purity, pressure and flow. ASTG builds these as OEM components and as integrated assemblies, using ultra-high-purity engineering techniques, for semiconductor fabs, refineries, research laboratories and industrial gas producers.

Gas sample distribution manifolds

ASTG automates UHP gas analytical systems in the smallest footprint possible, built from orbitally welded components. Gas-actuated stainless steel diaphragm valves let a manifold asynchronously port multiple samples, calibration gases and zero gases through an analytical system without cross-contamination or leakage. High-speed activation legs are included on all systems to ensure the fastest, most representative sample possible. View the distribution manifold.

Gas regulators, pressure gauges and stainless steel tubing on an ASTG gas delivery panel

Stream switching and stream selection

Where one analyzer has to serve several sample points, a stream switching system manages, switches and controls gas streams in sequence, so a single instrument covers multiple lines without compromising sample integrity. View the stream switching system or custom sample handling systems built to a specific configuration.

Sampling assemblies and kits

ASTG low-pressure sampling kit in its transport case

Low-pressure sampling kits take safe, repeatable samples from any high-pressure liquid or gaseous cryogenic source. The kit phase-changes a liquid cryogenic sample into a low-pressure gas sample, which removes the hazardous-materials classification and allows the sample to ship as non-hazardous material for off-site analysis.

LPMS-CRYO for any liquid cryogenic sample · LPMS-MIOGI-Q for cryogenic oxygen purity to 99.9% · LPMS-CO₂ for liquid or gaseous carbon dioxide · LPMS-ABO for aviator breathing oxygen. View the sampling kits.

Gas blending and dilution

The UHP Gas Blender System provides precision gas mixing for semiconductor, laboratory research and food packaging applications, producing consistent and controlled gas compositions.

The ASTG-RBS Remote Blending System combines computer-controlled mass-flow blending with remote I/O blend modules, split into two functioning elements: the Control Head and the Dilution I/O®. View the gas blenders.

Purification, regulation and detection

Cryogenic purifiers cool gas close to its boiling point to condense and remove trace impurities. Field regulator boxes house the controls that adjust gas flow to the tolerance an analytical process requires. Fixed gas detection covers everything from spot-checking a manufacturing issue to battery-limit testing an entire facility.

What each subsystem does

Subsystem	Typical use
Sample distribution manifold	Porting multiple samples, calibration and zero gases to one analyzer
Stream switching system	Sequencing several sample lines through a single instrument
Low-pressure sampling kit	Taking a shippable, non-hazardous sample from a cryogenic or high-pressure source
Gas blender / divider	Producing repeatable calibration and process gas mixtures
Cryogenic purifier	Removing trace impurities from a bulk gas stream
Field regulator box	Controlling delivery pressure and flow at the point of use

Gas delivery subsystem FAQ

What is a gas delivery subsystem?

It is the hardware between a gas source and the tool or analyzer that uses it, including distribution manifolds, stream switching, regulation, blending, purification and sampling assemblies. Its job is to deliver gas at the required purity, pressure and flow without contaminating it.

Does ASTG supply subsystems to OEMs and integrators?

Yes. ASTG supplies individual subsystems as OEM components and builds them into complete integrated assemblies, using ultra-high-purity engineering techniques throughout.

What are gas sampling assemblies used for in refineries and laboratories?

They take a safe, repeatable sample from a process line so it can be analyzed on site or shipped for off-site analysis. ASTG's low-pressure kits convert cryogenic and high-pressure samples into a non-hazardous form that can be shipped.

How does ASTG prevent cross-contamination in gas delivery?

Systems are built from orbitally welded components with gas-actuated stainless steel diaphragm valves, so multiple samples, calibration gases and zero gases can be ported through the same system without cross-contamination or leakage.

Can one analyzer serve several sample points?

Yes. A gas sample distribution manifold or stream switching system sequences several lines through a single instrument, with high-speed activation legs to keep each sample representative.

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