Stationary Face: Diameter Range 10-500 mm, Hardness 70-90 HRC

Component Specifications

Definition

The stationary face is a critical component of mechanical seals used in pumps, compressors, and mixers. It remains fixed relative to the equipment housing while maintaining precise contact with the rotating face to create a dynamic seal. This component is engineered to withstand pressure differentials, temperature variations, and chemical exposure while maintaining dimensional stability and surface finish integrity.

Working Principle

The stationary face operates on the principle of creating a controlled leakage path through precise surface contact with the rotating face. A thin fluid film forms between the two faces, providing lubrication while preventing bulk fluid passage. Spring or bellows loading maintains consistent contact pressure, and the stationary face's thermal conductivity helps dissipate frictional heat generated at the sealing interface.

Materials

Common materials include silicon carbide (SiC), tungsten carbide (WC), alumina ceramic (Al2O3), and carbon graphite. Material selection depends on application requirements: SiC for chemical resistance, WC for wear resistance, Al2O3 for cost-effective applications, and carbon graphite for self-lubricating properties. Material specifications include hardness (70-90 HRC for ceramics), thermal conductivity (50-120 W/m·K), and chemical compatibility ratings.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Hardness	70-90 HRC
Diameter Range	10-500 mm
Surface Finish	0.05-0.2 μm Ra
Pressure Rating	Up to 100 bar
Surface Flatness	≤ 0.0009 mm
Temperature Range	-100°C to +400°C

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 21049, DIN 24960, API 682

Parent Products

This component is used in the following industrial products

Mechanical Seal

A device that prevents fluid leakage between rotating and stationary parts in a pump.

View Product Details

Engineering Analysis

Risks & Mitigation

Thermal cracking from rapid temperature changes
Chemical attack from process fluids
Wear from abrasive particles in fluid
Improper installation causing misalignment
Cavitation damage in high-pressure applications

FMEA Triads

Trigger: Thermal shock from sudden temperature changes
Failure: Radial cracking and seal leakage
Mitigation: Use materials with higher thermal shock resistance, implement gradual temperature changes, add cooling systems

Trigger: Abrasive particles in process fluid
Failure: Excessive wear and loss of sealing surface
Mitigation: Install filtration systems, use harder face materials like silicon carbide, implement flush systems

Trigger: Improper gland plate installation
Failure: Face misalignment and uneven wear
Mitigation: Use precision alignment tools, follow torque specifications, implement installation training programs

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Flatness tolerance ≤ 0.0009 mm, surface roughness 0.05-0.2 μm Ra, dimensional tolerance IT6-IT7

Test Method

Surface flatness testing with optical flats, surface finish measurement with profilometer, material hardness testing with Rockwell C scale, pressure testing per API 682 standards

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 Stationary Face

Manufacturer profiles associated with Stationary Face.

Sourcing Stationary Face from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

Frequently Asked Questions

What is the difference between stationary and rotating faces in mechanical seals?

The stationary face remains fixed to the equipment housing while the rotating face rotates with the shaft. Both create the sealing interface, but the stationary face typically has different material properties and mounting requirements.

How often should stationary faces be replaced?

Replacement intervals depend on operating conditions, typically 1-5 years. Indicators include increased leakage, visible wear patterns, or changes in equipment vibration signatures.

Can stationary faces be resurfaced or repaired?

Generally not recommended due to strict flatness and finish requirements. Minor imperfections can sometimes be lapped, but replacement is usually more cost-effective and reliable.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Stationary Face