- Qingqingquan
- Shandong
- 20 days
- 300 units per month
ASME-certified stainless RO pressure vessels withstand 1000psi. Prevent 23% membrane failures. Download free technical drawings.
Stainless Steel RO Pressure Vessels: 2025 Technical Guide
Why Pressure Vessel Quality Matters?
• Membrane Protection: Prevents element movement (≤0.5mm tolerance)
• Pressure Integrity: Withstands 150-1000psi operating pressure
• Contamination Prevention: 100% leak-proof sealing
• Longevity: 10+ year service life in seawater applications
Industry Data: Poor vessels cause 23% premature membrane failures (SWRO 2023 Report)
5 Key Pressure Vessel Types
1. By Material
| Type | Max Pressure | Best For |
|---|---|---|
| 316L SS | 1000psi | Seawater RO |
| 304 SS | 600psi | Brackish water |
| FRP | 300psi | Low-cost applications |
2. By Size
• 4" Systems:
4021 (1 element)
4040 (1-2 elements)
4080 (2 elements)
• 8" Systems:
8040 (1 element)
8080 (2 elements)
80160 (4 elements)
3. By Connection
✔ End-Port: Compact design
✔ Side-Port: Better flow distribution
✔ Hybrid: Dual-end + side ports
Technical Specifications
| Parameter | 4" Vessel | 8" Vessel |
|---|---|---|
| Max Pressure | 600psi | 450psi |
| Temp Range | -20°C~80°C | -20°C~70°C |
| Surface Finish | 0.8μm Ra | 1.6μm Ra |
| O-Ring Material | EPDM/FKM | NBR/HNBR |
Certifications: ASME BPE, FDA CFR 21, PED 2014/68/EU
Selection Guide
For Seawater Desalination
• Material: 316L SS
• Connection: Dual side ports
• Pressure: ≥800psi
• Example: 8040-600-6S (6-element array)
For Industrial RO
• Material: 304 SS
• Configuration: 3:2 staging
• Layout: 180° end-fed
For Pharma Purification
Features:
• Electropolished interior
• Tri-clamp ends
• CIP capability
5 Competitive Advantages
✅ Laser-welded seams (zero pitting)
✅ Modular interconnects for easy expansion
✅ Anti-biofouling surface treatment
✅ 3D-printed end caps for perfect fit
✅ Real-time pressure monitoring ports
Industry Applications
1. Offshore Desalination
• Platform-based SWRO systems
• 25% lighter than FRP alternatives
2. Food Processing
• Meets 3-A Sanitary Standards
• Quick-disconnect for cleaning
3. Power Plants
• Ultra-pure water production
• Withstands thermal cycling
4. Emergency Water
• Mobile military units
• Disaster relief systems
Maintenance Protocol
🔧 Monthly: O-ring inspection
📊 Quarterly: Pressure testing
🧼 Biannual: Passivation treatment
⚠️ Annual: Full integrity check
Pro Tip: Use silicon-free lubricant on O-rings
Free Resources
📥 Download: "Vessel Sizing Calculator"
🔧 Get: CAD Drawings (All Models)
⚡ Limited: Free Gasket Kit with Purchase
