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Help CenterSemi-welded Steam Plate Heat Exchanger 316L/304 SS 150°C Steam to Water
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As a leading manufacturer from Qingdao Conqinphi Environmental Technology Group Co., Ltd. (established 2015, factory size 10,000–30,000 m²), we proudly present our Semi-welded Steam Plate Heat Exchanger constructed from premium 316L/304 stainless steel, designed specifically for steam-to-water applications up to 150°C. This robust heat exchanger combines the high efficiency of plate heat exchangers with the durability of semi-welded channels, ensuring reliable operation in demanding industrial environments. With over 200 skilled employees and annual export value exceeding US$10 million, our products are trusted by clients across North America, Europe, Asia, and Oceania.
The semi-welded design provides two distinct fluid circuits: one side uses welded channels for high-temperature steam, while the other side uses gasketed channels for water or other fluids. This configuration offers excellent leakage prevention, easy maintenance, and the ability to handle aggressive media. Our heat exchanger is ideal for district heating, power generation, chemical processing, and food & beverage industries where steam heating and precise temperature control are critical.
Key Features & Technical Specifications
- High Thermal Efficiency – Turbulent flow pattern with optimized corrugation angles achieves heat transfer coefficients up to 6000 W/m²·K for steam-to-water duty.
- Durable Construction – Plates made of 316L or 304 stainless steel, laser-welded on the steam side to withstand high temperature and pressure.
- Compact Design – Up to 80% space saving compared to shell-and-tube exchangers, with flexible installation options.
- Easy Maintenance – Water side uses gaskets that can be replaced without special tools; plate pack can be tightened or expanded.
- Customizable Parameters – Plate thickness, gasket material (EPDM, NBR, Viton), port size, and frame length are adjustable to meet specific requirements.
- Leak-Proof Operation – Double gasket sealing with leak detection grooves on the gasketed side; welded channels eliminate steam leakage.
| Design Temperature | 150°C (max.) |
| Design Pressure | Up to 25 bar (steam side), 10 bar (water side) |
| Plate Material | 316L / 304 SS (optional: Titanium, Hastelloy) |
| Gasket Material | EPDM (standard), NBR, Viton (optional) |
| Connection Size | DN25 – DN150 (threaded or flanged) |
| Flow Rate | Up to 500 m³/h per unit (customizable) |
Customer Benefits
- Energy Savings – High heat transfer efficiency reduces steam consumption, lowering operating costs.
- Long Service Life – 316L/304 SS plates resist corrosion and scaling, even with poor water quality.
- Reduced Downtime – Semi-welded design simplifies cleaning and gasket replacement; spare parts available globally.
- Versatile Application – Suitable for steam heating, condensate cooling, process water heating, and district heating networks.
- Compliance – Manufactured under ISO9001 quality management system; optional certifications like HACCP for food industry.
Frequently Asked Questions (FAQ)
Q1: What is the difference between semi-welded and fully welded plate heat exchangers?
A: Semi-welded heat exchangers have one channel welded (usually for high-temperature steam) and the other gasketed, allowing easier access for cleaning. Fully welded units have both sides welded, offering higher pressure resistance but less flexibility.
Q2: Can this heat exchanger handle steam above 150°C?
A: Our standard design is rated for 150°C max. For higher temperature requirements (up to 200°C), we offer upgraded gasket materials and welding processes. Please contact us for custom solutions.
Q3: What gasket materials are available for the water side?
A: Standard EPDM is suitable for water up to 130°C. For higher temperatures or aggressive chemicals, we provide NBR or Viton gaskets. All gaskets are FDA-approved for food contact upon request.
Q4: How do you prevent steam leakage from the welded side?
A: The steam-side plates are laser-welded with a controlled penetration depth, ensuring a leak-proof joint. Additionally, we conduct 100% pressure testing with helium or water before shipment.
Q5: What is the typical delivery time for a custom unit?
A: Standard units ship within 30 days. Custom sizes or special materials may require 45–60 days. We offer expedited manufacturing for urgent orders.
Q6: Does your company provide installation and commissioning support?
A: Yes, we provide detailed technical documentation, and our engineers can offer online guidance or on-site assistance (subject to travel conditions). Training for maintenance staff is also available.
Q7: Can I get a sample unit for testing before bulk order?
A: We accept sample orders for performance validation. The sample cost can be deducted from the first production order. Contact our sales team for details.
Q8: What certifications does your factory hold?
A: Our factory is certified under ISO9001, ISO14001, OHSAS18001, and HACCP. We also comply with TL900, QS9000, and SA8000 standards. Specific certificates are available upon request.
Backed by Qingdao Conqinphi Environmental Technology Group Co., Ltd. – a manufacturer with 200+ employees, a 10,000–30,000 m² facility, and annual export value of US$10–50 million. Our products are shipped from Qingdao Port and have been trusted by clients in North America, South America, Europe, Africa, Oceania, and Asia. We welcome OEM/ODM inquiries and invite you to contact us for a competitive quotation. Choose reliability – choose Conqinphi.
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