Inlet/Outlet Port: Size Range DN16 to DN160

Q: What's the difference between ISO-KF and CF flange connections?

ISO-KF (Klein Flange) uses a clamp and O-ring for quick connections up to DN50, while CF (ConFlat) uses a metal gasket and bolts for ultra-high vacuum applications with better leak-tightness.

Q: How often should port seals be replaced?

O-rings and gaskets should be inspected quarterly and replaced annually or when leaks exceed 1x10^-9 mbar·L/s, depending on operational cycles and media compatibility.

Component Specifications

Definition

Inlet/outlet ports in vacuum pumps are critical interface components designed to connect the pump to external systems, ensuring controlled intake of gases/vapors and exhaust of processed media. These ports maintain vacuum integrity while allowing connection to piping, chambers, or other equipment through standardized flanges or threaded fittings. They are engineered to minimize pressure drops, prevent leaks, and withstand operational stresses including thermal cycling and chemical exposure.

Working Principle

Inlet ports create a controlled pathway for gases/vapors to enter the pump's compression chamber, while outlet ports expel processed media after compression. Both function by maintaining airtight seals through gaskets or O-rings, with geometries optimized to reduce turbulence and backflow. Port sizing and design directly influence pump efficiency by minimizing flow resistance and maintaining consistent pressure differentials.

Materials

Stainless steel (304/316), aluminum alloys, brass, or engineered plastics (PTFE, PEEK) depending on chemical compatibility and pressure requirements. Seals typically use Viton, EPDM, or silicone O-rings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Port Type	Flanged/Threaded
Size Range	DN16 to DN160
Pressure Rating	10^-6 to 10^3 mbar
Temperature Range	-20°C to 150°C
Connection Standard	ISO-KF, CF, NPT, BSP

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 2861, DIN 28403, ISO 1609

Parent Products

This component is used in the following industrial products

Vacuum Pump

A mechanical device that removes gas molecules from a sealed volume to create a partial vacuum within an industrial system.

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Breather Assembly

A protective device that allows air exchange while preventing moisture and contaminants from entering the conservator tank.

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Engineering Analysis

Risks & Mitigation

Leak development from seal degradation
Corrosion from aggressive media
Mechanical damage during connection/disconnection
Contamination from improper cleaning

FMEA Triads

Trigger: Seal material incompatibility with process media
Failure: Vacuum loss and system contamination
Mitigation: Use chemically resistant seals (e.g., FFKM for aggressive chemicals) and implement regular leak testing

Trigger: Improper torque during flange assembly
Failure: Distortion or cracking of port fittings
Mitigation: Use calibrated torque wrenches and follow manufacturer specifications for bolt tightening sequences

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Leak rate <1x10^-9 mbar·L/s, surface finish Ra ≤0.8μm for metal seals

Test Method

Helium leak detection per ISO 3530, pressure decay testing

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Inlet/Outlet Port

Manufacturer profiles associated with Inlet/Outlet Port.

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Frequently Asked Questions

What's the difference between ISO-KF and CF flange connections?