Cleanroom Utility Systems

High-Purity Gas Regulator

A compact single-stage pressure-reducing regulator with a 316L VAR body, tied metal diaphragm and welded face-seal connections for clean, low-volume control at high-purity gas points of use.

Clean single-stage point-of-use pressure reduction
Tied metal diaphragm with low internal volume
316L VAR flow path with welded face-seal ends

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Product Introduction

The High-Purity Gas Regulator is a compact hand-loaded, single-stage pressure-reducing component for installation in a compatible high-purity gas line. The selected catalogue configuration has one electropolished 316L VAR stainless body, one tied corrosion-resistant metal diaphragm, one replaceable polymer seat, one cylindrical spring bonnet with one black adjustment knob, and two opposing welded 1/4 in. gasket face-seal connections. Gas enters one side of the body, passes the inlet seat and poppet, and leaves at the controlled downstream pressure while the diaphragm balances outlet-pressure force against the operator setting. The regulator is supplied without gauges, shut-off valves, cylinder connectors, purifier media, controller, cable or mounting panel; upstream isolation, relief, purging and pressure indication remain functions of the surrounding gas system.

Key Features

Internally threadless wetted construction reduces trapped volume and particle-generating interfaces in the process path

A tied metal diaphragm couples the sensing element to the valve stem for positive closure response during pressure changes

Metal-to-metal diaphragm sealing limits elastomer exposure at the body joint and supports high-purity gas integrity

Electropolished 316L VAR body surfaces provide a clean corrosion-resistant flow path for compatible specialty gases

Low internal volume supports efficient purging when gas identity or process condition changes

Single-stage architecture gives compact point-of-use pressure reduction where cylinder-depletion compensation is not required

Opposed welded face-seal ports allow direct inline installation with a short, symmetric gas path

A captured adjustment mechanism keeps the pressure-setting hardware separate from the wetted volume

Seat and diaphragm materials can be selected for the intended gas, temperature and inlet-pressure duty

Panel-mount and tamper-resistant adjustment arrangements are available for controlled equipment integration

Customer Product Concerns

Reliable high-purity regulation depends on matching the regulator to gas chemistry, pressure range and peak flow while protecting the clean internal path during installation and service.

A regulator selected only by port size may have the wrong seat, diaphragm or body material for the process gasReview the complete wetted-material combination against the named gas, impurity profile, temperature and pressure before ordering.

An oversized pressure range can make low setpoints difficult to adjust repeatablyChoose the narrowest outlet range that covers normal operation and start-up demand with an appropriate control margin.

Supply-pressure decay can shift the downstream setpoint in a single-stage designQuantify the permitted supply-pressure effect and use stable upstream pressure or a two-stage arrangement when cylinder depletion is critical.

Particles or moisture introduced during assembly can compromise a clean gas pathKeep protective caps fitted until connection, use compatible metal gaskets and complete a controlled high-purity purge before service.

Peak tool flow can cause droop even when average consumption appears lowSize the flow coefficient from maximum instantaneous demand, inlet pressure, selected outlet setting and allowable pressure loss.

Turning the knob down does not automatically remove gas trapped downstreamProvide a separate approved downstream vent or process-consumption path and never rely on a non-self-venting regulator for depressurization.

Typical Applications

Semiconductor process-tool gas boxes requiring compact final pressure reductionLow-pressure gas cabinets and valve manifold boxes serving compatible specialty gasesAnalytical instruments supplied with high-purity carrier, calibration or zero gasResearch reactors, gloveboxes and deposition systems with clean point-of-use gas controlElectronics and photovoltaic manufacturing equipment using controlled inert or process gasOEM gas-delivery assemblies where low internal volume and face-seal connections are preferred

Technical Parameters

The selected catalogue basis follows a TESCOM 12-Series-class miniature UHP regulator with a 316L VAR body, tied metal diaphragm, internally springless and threadless wetted path, welded 1/4 in. face-seal ends and 5-10 µin Ra electropolished surface options. The fixed geometry and material-property entries below are conservative selected-design values used to describe one compact catalogue configuration; they are not universal dimensions or ratings for every gas regulator. Final inlet pressure, outlet range, flow coefficient, seat, diaphragm, cleaning level and gas compatibility must be selected for the actual service.

Core Material	Electropolished 316L VAR stainless body and flow path with a Hastelloy metal diaphragm and stem plus a gas-compatible PCTFE seat
Panel Thickness	0.10 mm nominal tied metal sensing-diaphragm thickness for the selected compact design basis
Effective Width	38 mm nominal maximum body diameter for the selected miniature inline configuration
Maximum Length	96 mm representative overall height from regulator body to adjustment-knob crown
Steel Facing Thickness	1.2 mm nominal 316 stainless cylindrical bonnet-wall thickness for the selected construction
Core Density	8000 kg/m³ nominal density of the selected 316L VAR stainless body material
Thermal Conductivity	15 W/(m·K) representative thermal conductivity of 316L stainless steel near 20°C
Surface Finish	Natural-silver electropolished 316L VAR wetted surfaces, selectable at approximately 0.13 or 0.25 µm Ra
Joint Type	Opposed welded 1/4 in. gasket face-seal inlet and outlet with a metal-to-metal diaphragm-to-body seal
Customization	Available based on the intended application and operating environment.

Available Options

Outlet-pressure ranges selected for the downstream tool or analytical instrumentStandard or higher-flow valve-seat configurationsHastelloy or 316L metal diaphragm selections for compatible gas servicePCTFE or alternative seat materials matched to pressure and temperature1/4 in. welded face-seal, tube-stub or surface-mount connection formats5 µin or 10 µin Ra electropolished wetted-surface finishBlack hand knob, antitamper cap or panel-mount adjustment arrangementNormally closed pneumatic loading for compatible automated assembliesElectronic-grade cleaning and double-bagged packaging options

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