HENGTROL — Precision Gas Flow Resistance & Porous Flow Control Solutions
Porous Metal Flow Control

Precision Gas Flow
Resistance & Porous
Flow Control Solutions

Sintered porous metal for gas damping, flow stabilization, and precision ΔP control.

316L Titanium Nickel 0.2–90 µm porosity
CFD · GAS FLOW THROUGH POROUS MEDIA
ΔP ↓ · FLOW STABILIZED
POROUS MEDIA sintered · µm-graded
0.2–90 µm
Controlled pore size
3 alloys
316L · Ti · Nickel
5 sectors
Critical-flow industries
CFD verified
Simulation-driven design
The Porous Advantage

A drilled orifice controls flow at one point. Porous metal controls it everywhere.

One hole clogs, jets, and drifts. We spread resistance across millions of engineered micro-paths — so flow stays repeatable and laminar for the life of the part.

  • check_circleClog-tolerant — millions of parallel paths, not one hole to block.
  • check_circleLaminar output — pulsation and jetting are damped inside the media.
  • check_circleRepeatable ΔP — permeability characterized and matched lot-to-lot.
  • check_circleIntegrated filtration — flow control and particle capture in one element.
errorSingle drilled orifice

One point of resistance. Clogs, jets, and drifts over time.

south
grainHENGTROL porous media

Distributed micro-porosity. Particulate-tolerant, self-damping, dimensionally stable.

01 / Core Technology

The physics of controlled resistance, engineered into metal

Every element starts as a flow problem. We solve it in the pore structure — not with an orifice.

grain

Sintered porous metal flow control

Graded pore networks give tunable, repeatable permeability.

air

Gas damping & stabilization

Micro-porosity absorbs pulsation for a smooth, laminar output.

tune

Micro-channel resistance design

ΔP curves tuned by pore size and density, validated in CFD.

thermostat

High-temperature resistant structures

All-metal, binder-free — stable under high heat and harsh media.

02 / Product Catalog

Explore our products

Select a category for specs, sizes, connections, and applications.

Precision Orifices product photo

Precision Orifices

Calibrated single-point orifices for exact, repeatable flow.

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Check Valves product photo

Check Valves

One-way flow control with low, consistent cracking pressure.

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Flow Controls product photo

Flow Controls

Adjustable and fixed regulation for gas and liquid lines.

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Fixed Flow Rate Orifices product photo

Fixed Flow Rate Orifices

Preset flow-rate elements — no field adjustment needed.

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Miniature In-Line Screens & Breathers product photo

Miniature In-Line Screens & Breathers

Compact in-line filtration and controlled venting.

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Mini Stainless Fittings & Bulkhead Connectors product photo

Mini Stainless Fittings & Bulkhead Connectors

316L fittings and bulkhead connectors for tight assemblies.

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Pneumatic Float Valves & Level Sensors product photo

Pneumatic Float Valves & Level Sensors

Float-actuated level control and point-level sensing.

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03 / Manufacturing Capabilities

From metal powder to a finished, traceable flow element

Every step is controlled in-house — the only way to guarantee pore structure and ΔP repeatability lot after lot.

Powder selection — process photo01

Powder selection

Alloy and particle-size grade chosen to hit the target pore range.

Compaction & forming — process photo02

Compaction & forming

Powder pressed to net shape and controlled green density.

Controlled sintering — process photo03

Controlled sintering

Binder-free thermal cycle bonds particles into a stable pore network.

CNC machining — process photo04

CNC machining

Finished to µm-level dimensions and sealing surfaces.

Welding & assembly — process photo05

Welding & assembly

Media integrated into housings, fittings, and sub-assemblies.

Permeability testing — process photo06

Permeability testing

Bubble-point and flow verification against the ΔP spec.

Cleaning & passivation — process photo07

Cleaning & passivation

High-purity clean and passivation for cleanroom-grade service.

Packaging & traceability — process photo08

Packaging & traceability

Documented material and lot traceability with every shipment.

04 / Industry Applications

Where flow precision is non-negotiable

memory

Semiconductor

Gas delivery, mass-flow control, and process-chamber diffusion.

medical_services

Medical

Ventilation, anaesthesia, and oxygen-flow restriction.

science

Chemical

Corrosion-resistant spargers, distributors, and reactor flow.

biotech

Analytical

Chromatography, GC/MS inlets, and reference flow.

bolt

Hydrogen Energy

Fuel-cell humidification, purge control, and H₂ management.

flight

Vacuum & Aerospace

Vacuum break, bleed control, and inert-gas purging.

05 / Engineering Capability

From flow requirement to production part — in-house

architecture

Custom design

Geometry, porosity, and ΔP tuned to your envelope.

handshake

OEM / ODM

Private-label components built into your assembly.

waves

CFD simulation

Flow, pressure, and diffusion modelled up front.

local_fire_department

Sintering process

Powder metallurgy for repeatable pore structures.

DEVELOPMENT WORKFLOW
01

Requirement

需求 · Flow, ΔP, media & environment defined.

02

Design

设计 · CFD-driven geometry & pore engineering.

03

Prototype

样品 · Sample sinter, characterize & validate.

04

Production

量产 · Scaled manufacturing with lot traceability.

06 / Case Study

Stabilizing gas delivery for a semiconductor OEM

Illustrative engagement — replace with your published case.

PROBLEM

Pressure transients in a precursor line caused flow instability and inconsistent dosing.

SOLUTION

A 316L graded-pore damping restrictor, ΔP-matched in CFD, drop-in to the existing fitting.

RESULT

Laminar downstream flow; pulsation and dosing variance cut across the fleet.

Stable ΔP · repeatable lot-to-lot
Why HENGTROL

An engineering partner, not a parts catalog

draw

Application engineering

We design the pore structure around your flow problem.

settings

No moving parts

Nothing to wear, stick, or drift — resistance is solid metal.

equalizer

Repeatable ΔP

Permeability matched part-to-part and lot-to-lot.

layers

Material breadth

316L, titanium, and nickel for corrosive and high-temp service.

local_fire_department

In-house sintering

Powder metallurgy and pore grading under one roof.

schedule

Fast, technical response

Engineers reply to your RFQ within one business day.

±3%
Typical flow repeatability, lot-to-lot

Resistance lives in a characterized pore network — not a drilled hole — so every part delivers the same ΔP curve.

0.2 µm
Finest pore
1 day
RFQ response
3 alloys
316L · Ti · Ni
07 / Materials & Quality

Certified alloys, characterized porosity

Material
Pore range
Best for
316L Stainless
0.2–90 µm
General flow & damping
Titanium
0.5–50 µm
Corrosive & medical
Nickel
1–80 µm
High-temp & catalytic

Quality & control

  • verifiedPore-size & permeability characterized per lot
  • fact_checkBubble-point & flow testing to spec
  • inventory_2Full material & lot traceability
  • precision_manufacturingµm-level dimensional tolerance
08 / FAQ

Frequently asked questions

Can you match a specific ΔP or flow curve?expand_more

Yes. Send your target flow vs. pressure-drop and operating gas — we tune pore size, thickness, and density and validate the curve in CFD before sampling.

What is the smallest pore size and tightest tolerance?expand_more

Controlled pore sizes from 0.2 µm, with µm-level dimensional tolerances on finished, machined parts.

Do you offer custom, OEM, and ODM parts?expand_more

Yes — from a drawing, a sample, or a flow spec. We support private-label components and integrated sub-assemblies.

Which materials are available?expand_more

316L stainless, titanium, and nickel as standard; other sinterable alloys on request for special chemistry or temperature needs.

What is the typical lead time for samples?expand_more

Sample and prototype timelines depend on geometry and material — share your requirement and we confirm a schedule with the quote.

Is there a minimum order quantity?expand_more

We support both prototype quantities and scaled production runs, with lot traceability across every batch.

How is flow performance tested and certified?expand_more

Bubble-point and flow/permeability testing per lot, with material and lot traceability documentation supplied on request.

Are parts suitable for cleanroom or high-purity gas?expand_more

Yes — parts can be cleaned, passivated, and packaged for high-purity and cleanroom service.

09 / Request For Quote

Need a Custom Gas
Flow Solution?

Send a drawing or describe your ΔP target — our engineers respond with a technical proposal, not a sales pitch.

  • drawSend an RFQ drawing or 3D model
  • engineeringTalk directly to a flow-control engineer
  • scheduleTechnical response within one business day
Project brief
forumTalk to Engineer