Precision CNC Machined Stainless Steel Flange Shaft Seat with Customizable Geometry for Gas-Liquid Separators
This Precision Machined Stainless Steel Flange Shaft Seat is a high-performance mounting component specifically engineered for gas-liquid separators, including centrifugal separators, cyclone separators, and three-phase oil-gas-water separation systems.
The flange shaft seat acts as the stationary or rotating support interface between the separator housing and the drive shaft or rotor assembly. It provides precise axial and radial positioning, ensures smooth shaft rotation, and withstands the mechanical loads and environmental conditions typical in gas-liquid separation processes.
Manufactured from high-grade stainless steel and finished with precision CNC machining, this component delivers excellent corrosion resistance, dimensional accuracy, and long-term reliability in demanding industrial environments.
- Precision CNC Machined - Achieves tight tolerances down to ±0.005 mm, ensuring accurate shaft alignment and minimal vibration during high-speed separator operation.
- Stainless Steel Construction - Available in SS304, SS316, SS316L, or duplex stainless steel, providing outstanding resistance to corrosion from moisture, hydrocarbons, and light chemical agents.
- Integrated Flange Design - The flange allows secure bolt-mounted attachment to the separator housing, simplifying installation and maintenance while improving structural rigidity.
- Smooth Bearing or Seal Contact Surface - Surface finish up to Ra 0.8 μm on critical contact areas, reducing friction and wear on rotating seals, bearings, or shaft sleeves.
- High Mechanical Strength - Suitable for applications involving pressure differentials, moderate vibrations, and continuous duty cycles.
- Customizable Geometry - Flange diameter, bolt hole pattern, shaft bore size, and overall length can be tailored to match specific separator models or OEM requirements.
| Parameter | Value / Range |
|---|---|
| Machining Process | CNC Turning, Milling, Drilling, Boring |
| Material Options | SS304, SS316, SS316L, Duplex 2205, 17-4PH |
| Diameter Range (Flange OD) | 50 mm - 300 mm |
| Shaft Bore Diameter | 20 mm - 120 mm |
| Overall Length | 40 mm - 250 mm |
| Dimensional Tolerance | ±0.005 mm - ±0.01 mm |
| Surface Roughness (Critical Areas) | Ra 0.8 - 1.6 μm |
| Concentricity (Bore to Flange Face) | ≤ 0.02 mm |
| Perpendicularity (Bore to Flange Face) | ≤ 0.02 mm |
| Flange Hole Pattern | Custom (4, 6, 8, or 12 holes) |
| Heat Treatment (Optional) | Solution annealing + passivation |
| Surface Finish (External) | As machined, brushed, or electropolished |
This precision stainless steel flange shaft seat is widely used in the following gas-liquid separation equipment:
- Centrifugal gas-liquid separators (shaft support housing)
- Cyclone separators (rotor bearing seat)
- Three-phase oil-gas-water separators (drive shaft mounting flange)
- Compressor suction scrubbers (rotating element support)
- Mist eliminators with mechanical internals
- Biogas purification systems
- Industrial vacuum separators
It functions as the critical mounting interface that aligns and secures the rotating shaft or rotor assembly within the stationary separator body.
| Feature | Precision Machined SS Flange Shaft Seat | Cast or Fabricated Seat |
|---|---|---|
| Dimensional accuracy | High (±0.005 mm) | Low (±0.1 mm or more) |
| Surface finish | Excellent (Ra ≤ 1.6) | Rough (Ra ≥ 6.3) |
| Corrosion resistance | Superior (homogenous stainless steel) | Variable (coating dependent) |
| Concentricity & runout | Excellent (≤ 0.02 mm) | Poor to moderate |
| Batch-to-batch consistency | Very high | Low to moderate |
| Lead time for prototypes | 7-15 days | 30-60 days |
| Suitability for high-speed rotation | Excellent | Limited |
Every stainless steel flange shaft seat undergoes rigorous quality inspection before shipment:
| Inspection Item | Method |
|---|---|
| Critical dimensions | CMM or digital micrometers |
| Surface roughness | Contact profilometer |
| Concentricity / runout | Precision centers + dial indicator |
| Perpendicularity | Granite surface plate + height gauge |
| Material verification | Spectrometer (PMI test) |
| Visual & surface defects | Magnified visual inspection |
| Optional NDT | Dye penetrant test (DPT) |
Deliverables: Inspection report, material certificate (EN 10204 Type 3.1 or 3.2), and dimensional report upon request.
We offer full OEM customization based on your drawings, samples, or design specifications:
| Custom Feature | Options |
|---|---|
| Flange dimensions | Any OD, thickness, bolt circle diameter |
| Shaft bore | Smooth bore, keyway, spline, or tapered bore |
| Mounting holes | Threaded or clearance holes, any pattern |
| Seal grooves | Single or double labyrinth, O-ring grooves |
| Bearing seats | Integrated bearing housing with retaining ring groove |
| Surface treatment | Electropolishing, passivation, bead blasting |
| Marking | Laser engraving (part number, logo, material grade) |
| Material | Corrosion Resistance | Strength | Typical Application |
|---|---|---|---|
| SS304 | Good | Medium | General gas-liquid separation, mild environments |
| SS316 / SS316L | Excellent (chloride resistant) | Medium-High | Marine, chemical, or sour gas applications |
| Duplex 2205 | Superior (acid + chloride) | High | High-pressure, corrosive gas-liquid separators |
| 17-4PH | Good + heat treatable | Very High | High-strength, wear-resistant shaft seats |
- Anti-rust oil coating (for non-stainless materials if requested)
- Individual protective wrapping
- Foam-secured carton or plywood crate
| Order Type | Lead Time |
|---|---|
| Prototype (1-5 pcs) | 7-15 days |
| Small batch (10-50 pcs) | 15-20 days |
| Medium batch (50-500 pcs) | 20-30 days |
| Mass production (500+ pcs) | 30-45 days |
Shipping: By sea, air, or express (DHL, FedEx, UPS).
The flange shaft seat is a precision mounting component that supports and positions the rotating shaft or rotor assembly inside the gas-liquid separator. It attaches directly to the separator housing via its flange, providing accurate axial and radial alignment, ensuring smooth rotation, and maintaining seal integrity during operation.
We offer multiple stainless steel options to suit different operating environments:
| Grade | Corrosion Resistance | Best Suited For |
|---|---|---|
| SS304 | Good | General gas-liquid separation, mild conditions |
| SS316 / SS316L | Excellent (chloride resistant) | Marine, chemical, sour gas, or high-moisture environments |
| Duplex 2205 | Superior (acid + chloride resistant) | High-pressure, corrosive, or aggressive chemical separation |
| 17-4PH | Good + heat treatable | High-strength, wear-resistant applications |
Our precision CNC machining capabilities include:
| Parameter | Standard Tolerance | Precision Tolerance (upon request) |
|---|---|---|
| Diameter (bore / OD) | ±0.01 mm | ±0.005 mm |
| Length | ±0.02 mm | ±0.01 mm |
| Concentricity (bore to flange face) | ≤ 0.02 mm | ≤ 0.01 mm |
| Perpendicularity | ≤ 0.02 mm | ≤ 0.01 mm |
| Surface roughness (critical areas) | Ra 1.6 μm | Ra 0.8 μm |
Yes, absolutely. We provide full OEM customization based on your requirements:
- Flange outer diameter: Any size (typically 50 mm - 300 mm)
- Flange thickness: Customizable
- Bolt circle diameter (BCD): As per your drawing
- Number of holes: 2, 4, 6, 8, 12, or custom
- Hole type: Clearance holes, threaded holes, or counterbores
Please provide a drawing or sketch with your specific dimensions.
On bearing, seal, or shaft contact surfaces, we achieve:
- Standard: Ra 1.6 μm (suitable for most seals and bearings)
- Precision: Ra 0.8 μm (for high-speed or critical sealing applications)
- Upon request: Ra 0.4 μm (fine grinding or polishing)
External non-critical surfaces are typically left as-machined or can be electropolished, passivated, or bead-blasted.
Yes. We provide EN 10204 Type 3.1 material certificates as standard, which include:
- Material grade and standard
- Heat number / lot number
- Chemical composition analysis
- Mechanical properties (if applicable)
EN 10204 Type 3.2 certificates (third-party verified) are available upon request for an additional charge.
| Order Quantity | Lead Time |
|---|---|
| Prototype (1-5 pcs) | 7-15 days |
| Small batch (10-50 pcs) | 15-20 days |
| Medium batch (50-500 pcs) | 20-30 days |
| Mass production (500+ pcs) | 30-45 days |
Lead time depends on material availability, complexity, and current production schedule.
Yes, we encourage sample orders for quality verification.
- Sample quantity: 1-5 pieces
- Sample lead time: 7-15 days
- Sample charge: Applicable (refundable or deductible from mass production order)
- Sample shipping: By express (DHL, FedEx, UPS) at customer's cost
We can also provide 3D drawings or CAD models for your approval before production.
- Prototype / sample order: 1 piece (no MOQ)
- Trial batch: 10-50 pieces
- Standard production: 100 pieces (for optimal pricing)
We welcome both small and large quantity orders and offer flexible terms for new customers.
Each flange shaft seat undergoes 100% inspection before shipment:
| Inspection | Method / Tool |
|---|---|
| Critical dimensions | CMM or digital micrometers / calipers |
| Concentricity / runout | Precision centers + dial indicator |
| Perpendicularity | Granite surface plate + height gauge |
| Surface roughness | Contact profilometer |
| Material verification | Spectrometer (PMI test) |
| Visual defects | Magnified visual inspection (10x-20x) |
| Optional NDT | Dye penetrant test (DPT) or MPI |
Deliverables: Inspection report with each shipment; additional certificates available upon request.
Yes, depending on the material grade and design:
| Condition | Recommended Material | Limit |
|---|---|---|
| High temperature (continuous) | SS316L or Duplex 2205 | Up to 400°C (SS), 250°C (Duplex) |
| High pressure | Duplex 2205 or 17-4PH | Depends on flange thickness and bolt strength (engineer on request) |
Please provide your operating temperature and pressure for a specific material recommendation.
Although stainless steel is naturally corrosion-resistant, we offer:
| Treatment | Purpose |
|---|---|
| Passivation | Removes surface iron, restores corrosion resistance (recommended for SS) |
| Electropolishing | Smooths surface, improves cleanliness and corrosion resistance |
| Bead blasting | Uniform matte finish, hides tool marks |
| Laser marking | Part number, logo, material grade, or traceability code |
- Clean mating housing surface before installation
- Use a torque wrench for flange bolts (specify torque value per design)
- Verify shaft-to-bore clearance matches drawing requirements
- Apply anti-seize compound to bolts if disassembly is expected
- Inspect seal contact surface for scoring or wear during routine service
- Check flange bolts for loosening after initial operating hours
- Clean with mild solvent and soft cloth; avoid abrasive tools
Please send us the following:
- Drawing (PDF, DWG, DXF, STEP, or IGS) - preferred
- Material grade (or describe the operating environment)
- Quantity (prototype, trial, or annual volume)
- Critical dimensions or tolerances (if tighter than our standard)
- Special requirements (surface finish, heat treatment, marking, balancing, etc.)
If you don't have a drawing, we can work from a physical sample (reverse engineering) or a detailed sketch with key dimensions.
We stand behind the quality of our products:
- 12-month warranty against manufacturing defects
- Free replacement for any non-conforming parts (with supporting evidence)
- Technical support for installation, fitment, or performance issues
- Lifetime support for repeat customers (design improvements, cost reduction suggestions)
- Anti-rust protection (for non-stainless materials if requested)
- Individual bubble wrap or foam-secured compartments
- Sealed carton or plywood crate (depending on quantity)
| Method | Best for | Transit time |
|---|---|---|
| Express (DHL, FedEx, UPS) | Samples, small batches | 3-7 days |
| Air freight | Medium batches (50-200 kg) | 7-12 days |
| Sea freight | Large batches (200+ kg) | 20-40 days |
Yes. We offer reverse engineering services:
- 3D scanning or manual measurement of your sample
- CAD model creation (STEP, IGES)
- Drawing generation with critical tolerances
- Production of identical or improved replacement parts
Lead time for reverse engineering: 5-10 days (depending on complexity).
Yes. Our engineering team can assist with:
- Material selection based on operating conditions
- Tolerance recommendations for optimal seal/bearing life
- Design for manufacturability (DFM) feedback
- Weight reduction or cost optimization suggestions
We treat your design data as strictly confidential (NDA available upon request).
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.