High-Performance Semi-Welded Plate Heat Exchanger
1.High Temperature & Pressure Resistance
2.Excellent Corrosion Resistance
3.High Heat Transfer Efficiency
4.Reliable Welded Construction
5.Low Leakage Risk
6.Long Service Life & Stable Performance
High-Performance Semi-Welded Plate Heat Exchanger
Engineered for Hazardous Media, High Pressures & Extreme Industrial Reliability
As a premier semi welded plate heat exchanger manufacturer, we deliver industrial thermal solutions specifically designed to bridge the gap between traditional gasketed plate heat exchangers and fully welded shell-and-tube units. The semi welded phe features a unique hybrid design: heat transfer plates are paired and laser-welded together to form sealed cassette channels for aggressive or high-pressure media, while the opposite side utilizes standard elastomeric gaskets for conventional utility fluids.
Hazardous substances—such as ammonia ($\text{NH}_3$), synthetic refrigerants, aggressive acids, organic solvents, or high-pressure gases—flow exclusively within the laser-welded cassettes. Non-aggressive media (cooling water, brine, or heating water) streams through the gasketed channels. This dual-channel design guarantees maximum leak protection against toxic and corrosive chemicals while maintaining the flexibility and serviceability required for cost-effective maintenance.
Key Performance Advantages
1. Leak-Proof Cassette Safety
By replacing up to 50% of the internal gasket lines with automated precision laser welds, our cassette structure drastically lowers the risk of fluid cross-contamination and gasket blowouts in harsh operational environments.
2. High Pressure & Temperature Tolerance
Engineered with reinforced frames and optimized plate corrugation geometry, our units comfortably withstand operating pressures up to 40 bar and working temperatures spanning from -40°C to +180°C.
3. Easy Maintenance & Inspection
Unlike fully welded exchangers, a semi welded gasketed plate heat exchanger supplier design allows maintenance teams to unbolt the frame and easily access the utility side for mechanical cleaning and gasket replacement.
4. High Thermal Efficiency & Compact Footprint
Intense fluid turbulence generated by corrugated plate channels achieves overall heat transfer coefficients up to 3 to 5 times higher than shell-and-tube heat exchangers, significantly reducing equipment size and space requirements.
Technical Specifications & Custom Options
As an established semi welded gasketed plate heat exchanger supplier, we customize every thermal unit to match your exact process parameters, fluid chemistry, and system pressure ratings.
| Parameter | Standard Specification / Range |
| Plate Materials | AISI 316L, Titanium (Grade 1/2), Hastelloy C-276, SMO 254, Nickel Alloys |
| Gasket Materials | NBR, EPDM, FKM (Viton), Chloroprene, PTFE-encapsulated gaskets |
| Design Pressure Range | Full vacuum up to 40 bar (580 PSI) |
| Operating Temperatures | -40°C to +180°C (-40°F to +356°F) |
| Port Connection Sizes | DN50 to DN300 (2" to 12" Flanged / Studded) |
| Cassette Welding Standard | Automated laser beam welding with 100% Helium leak detection |
| Certifications & Compliance | ASME Section VIII Div 1, CE-PED, ISO 9001:2015, ISO 14001 |
Industrial Applications
Our heavy-duty semi welded phe systems are widely trusted by global EPC contractors, plant operators, and original equipment manufacturers across various demanding process industries:
Industrial Refrigeration: High-efficiency evaporators, flooded chillers, and condensers for industrial ammonia ($\text{NH}_3$) and $\text{CO}_2$ refrigeration systems.
Chemical & Petrochemical Processing: Heating, cooling, and condensation of strong acids, alkalis, solvent recovery streams, and volatile organic compounds (VOCs).
Oil & Gas Sector: Amine gas treating, hydrocarbon gas cooling, condensate cooling, and offshore platform heat exchange applications.
Pharmaceutical & Fine Chemicals: Reliable thermal regulation during solvent synthesis and high-purity fluid processing where seal integrity is vital.
HVAC & Marine Energy: Absorption chillers, geothermal heat pump systems, and seawater-cooled central cooling systems.
Quality Assurance & Global Manufacturing Standards
Every unit leaving our manufacturing facility undergoes stringent Quality Control (QC) and Non-Destructive Testing (NDT) to guarantee long-term operational safety:
1.100% Mass Spectrometer Helium Testing: Every individual laser-welded cassette is tested with helium gas under vacuum conditions to detect microscopic leakage paths down to ultra-strict tolerance levels.
2.Hydrostatic Pressure Testing: Fully assembled heat exchanger frames undergo static hydraulic pressure testing at 1.3 to 1.5 times the design pressure limit.
3.Full Material Traceability: Complete Mill Test Certificates (MTC / EN 10204 3.1) are supplied for all pressure-retaining plates, nozzles, and frame components.
Partner with a Leading Semi-Welded Heat Exchanger Manufacturer
Need a custom thermal calculation, technical advice, or a direct replacement for an existing semi-welded unit? Our thermal design engineers are ready to assist you.
Get a Custom Technical Quote & Thermal Sizing Calculation Today!
