PEEK 3-Way / 4-Way Fluid Fittings
PEEK multi-port fluid fittings for research instruments, compact fluidic systems, sampling, splitting, and combining applications. The series covers 3-port and 4-port configurations, 1/16 and 1/8 tubing, and 10-32 / 1/4-28 interface families for straightforward matching by tubing size, bore, and flow-path geometry.
Core Configuration
Product Overview
This series of PEEK 3-way and 4-way fluid fittings is designed for splitting, combining, bypass, sampling, and multi-branch connections in laboratory fluidic systems. Available geometries include T-type, Y-type, square, round, cross, and inline-base configurations, allowing selection around instrument space, tubing direction, and flow-path layout.
Models are available for common 1/16 (1.58 mm) and 1/8 (3.2 mm) tubing systems with bores from 0.5 to 1.5 mm. The PEEK body is suitable for research fluidics where electrical insulation, low metal contact, and chemical compatibility are important. Actual media compatibility, operating temperature, and pressure capability should be confirmed for the complete assembly, including tubing, nuts/ferrules, solvent composition, and operating conditions.
Core Product Features
Multiple Flow Geometries
T-type, Y-type, cross, square, and round geometries support different splitting/combining directions and instrument layouts.
Two Common Tubing Sizes
Supports both 1/16 and 1/8 tubing systems for analytical instruments, compact reactors, and laboratory fluidic assemblies.
Multiple Bore Options
0.5, 0.8, 1.0, and 1.5 mm bores can be selected according to flow rate, pressure-drop, and dead-volume requirements.
Non-Metallic PEEK Body
Suitable for research fluidics requiring electrical insulation, low weight, and reduced metal contact; confirm media compatibility for the intended operating conditions.
Clear Model Identification
CHST01–CHST09 and CHST-10 cover distinct configurations for clear experimental records, spare-parts management, and repeat ordering.
Selection Support
Selection can be reviewed against port count, thread, tubing size, bore, and installation constraints to reduce mismatch risk.
Quick Selection Filter
CHST01 · T-Type 3-Way
Straight three-port layout for standard fluidic connections; a larger-tubing 3-way fitting suitable for routine splitting and combining.
CHST02 · T-Type 3-Way
Compact geometry for small instrument fluidics; a standard 1/16 3-way fitting for basic splitting and combining.
CHST03 · Offset 3-Way
Offset geometry supports connections in confined spaces and horizontal tubing layouts.
CHST04 · Square 3-Way
Square body with a larger bore, suitable for panel-style fluid routing and higher-flow branch layouts.
CHST05 · Cross 4-Way
Four crossed ports support multi-branch connections, four-way distribution, and cross-flow routing.
CHST06 · Y-Type 3-Way
Y-shaped geometry provides a smoother angled transition for diagonal inlet/outlet routing and fewer sharp turns.
CHST07 · Y-Type 3-Way
Y-type branch for larger tubing, supporting angled three-way connections in 1/8 tubing systems.
CHST08 · Round 3-Way
Round geometry suits circular routing, perimeter tubing layouts, and compact installations.
CHST09 · Square 4-Way
1/8 four-way fitting for larger-flow branches, four-way distribution, and modular fluidic assemblies.
CHST-10 · Inline-Base 3-Way
Inline-base geometry supports horizontal routing and compact installation inside instruments.
Model Specification Comparison
| Model | Configuration | Ports | Thread / Seat | Tubing | Bore | Reference Dimensions |
|---|---|---|---|---|---|---|
| CHST01 | T-Type 3-Way | 3 | 1/4-28 / Flat-Bottom | 1/8 (3.2 mm) | 1.0 mm | Approx. 52.5 × 18.7 mm |
| CHST02 | T-Type 3-Way | 3 | 10-32 / Cone-Bottom | 1/16 (1.58 mm) | 0.5 mm | Body width approx. 25.4 mm |
| CHST03 | Offset 3-Way | 3 | 10-32UNF / Cone-Bottom | 1/16 (1.58 mm) | 0.5 mm | Approx. 27.5 / 12.8 / 8.8 mm |
| CHST04 | Square 3-Way | 3 | 1/4-28 / Flat-Bottom | 1/8 (3.2 mm) | 1.5 mm | Approx. 27.5 × 27.5 mm |
| CHST05 | Cross 4-Way | 4 | 10-32 / Cone-Bottom | 1/16 (1.58 mm) | 0.5 mm | Overall width approx. 27.8 mm |
| CHST06 | Y-Type 3-Way | 3 | 10-32 / Cone-Bottom | 1/16 (1.58 mm) | 0.8 mm | Center width approx. 9.8 mm |
| CHST07 | Y-Type 3-Way | 3 | 1/4-28 / Flat-Bottom | 1/8 (3.2 mm) | 1.0 mm | Center width approx. 9.8 mm |
| CHST08 | Round 3-Way | 3 | 10-32UNF / Cone-Bottom | 1/16 (1.58 mm) | 0.5 mm | Ø24 × 6 mm, boss Ø16 mm |
| CHST09 | Square 4-Way | 4 | 1/4-28 / Flat-Bottom | 1/8 (3.2 mm) | 1.5 mm | Approx. 27.5 × 27.5 mm |
| CHST-10 | Inline-Base 3-Way | 3 | 1/4-28UNF / Flat-Bottom | 1/8 (3.2 mm) | 0.8 mm | Approx. 27.5 / 12.8 / 8.8 mm |
Product Images
Interface & Specification Guide
1/16 Tubing Series
For tubing with an outer diameter of approximately 1.58 mm, primarily paired with 10-32-type interfaces and cone-bottom seats. Standard models include CHST02, CHST03, CHST05, CHST06, and CHST08.
1/8 Tubing Series
For tubing with an outer diameter of approximately 3.2 mm, primarily paired with 1/4-28-type interfaces and flat-bottom seats. Standard models include CHST01, CHST04, CHST07, CHST09, and CHST-10.
① Tubing OD → ② Thread specification → ③ Flat-bottom / cone-bottom seat → ④ Bore size → ⑤ 3-way / 4-way geometry and port direction. If matching existing nuts, ferrules, or tubing assemblies, provide photos or interface dimensions to help confirm compatibility.
No single maximum pressure or temperature is specified for the entire series because usable limits depend on the fitting, tubing, seals, media, and assembly condition. For high-pressure, high-temperature, or special-solvent applications, confirm the complete fluidic system before use.
Applications
Laboratory Fluidic Systems
Connect pumps, valves, reaction cells, reservoirs, and detection modules through three-way or four-way fluid paths.
Analytical & Sampling Lines
Supports bypass lines, sample distribution, pre-/post-mixing routing, and sampling branches in low-flow systems.
Electrochemical System Fluidics
Suitable for peripheral fluid lines where non-metallic fittings or compact routing are preferred.
Micro-Reaction & Transfer
Use different bore sizes and fitting geometries to organize branches and directional changes in confined spaces.
Internal Instrument Connections
Square, round, Y-type, and inline-base geometries support tubing routes that follow instrument architecture.
Teaching & Research Platforms
Clear model identification and intuitive geometry support fluidics demonstrations, research prototypes, and standardized spare-parts management.
Installation & Use Guide
Confirm that tubing OD, thread specification, and flat-bottom / cone-bottom seat are compatible.
Ensure the tube end is cut square and free of obvious burrs that could affect sealing or flow.
Tighten progressively using the compatible nut/ferrule system. Avoid forcing the assembly with excessive torque.
Before the experiment, perform a low-pressure flow and leak check with a compatible medium. Proceed to the intended operating condition only after confirming a secure seal.
FAQ
Can 1/16 and 1/8 models be used interchangeably?
Direct interchange is not recommended. The two tubing systems typically differ in outer diameter, thread, and seat geometry, so select according to the existing tubing and compatible fitting system.
Should I choose a T-type or Y-type 3-way fitting?
T-type fittings suit right-angle branch layouts, while Y-type fittings suit angled routing. If smoother directional transitions or limited installation space are priorities, compare the Y-type geometry first.
Why do 3-way models use different bore sizes?
Bore size influences flow rate, pressure drop, internal volume, and sensitivity to blockage. Select according to pump flow, media properties, and experimental objectives.
Can custom dimensions be requested?
Please provide the interface, tubing size, bore, port direction, and dimensional constraints. Feasibility is subject to a manufacturing review.
Purchase & Technical Support
Standard models can be identified directly by CHST number. If your current fluidic interface is uncertain, provide tubing OD, thread, seat type, bore, port direction, and media information so compatibility can be reviewed efficiently.
