In working conditions such as chemical processes, industrial refrigeration and seawater treatment that require high pressure resistance, corrosion resistance and regular cleaning, weld-gasket composite temperature control equipment stands out with its unique semi-welded and detachable structure. The complete components are divided into two systems: welded pressure-resistant and corrosion-resistant parts on one side, and maintainable gasket parts on the other side. It combines the tight sealing and pressure resistance of fully welded structures with the cleanable and repairable advantages of gasket structures, serving as a dedicated thermal device for complex and harsh working conditions.

Semi-welded plate pairs are the core heat exchange units and iconic components different from other structural equipment. Two corrugated plates are laser-seam welded around the edges to form enclosed plate pairs, constituting the flow channels on the welded side. With no rubber sealing accessories, the all-metal fully enclosed structure can directly carry corrosive media, high-pressure refrigerants and high-temperature chemical fluids, fundamentally eliminating leakage and gasket aging failure caused by corrosive media. The standard corrugated structure maintains strong fluid turbulence and stable high heat transfer efficiency. Multiple welded plate pairs are stacked to form a complete heat exchange core.

Corrosion-resistant sealing gaskets are core accessories of the detachable side, arranged only on the outer flow channels of plate pairs to isolate clean and mild medium channels. Different from the full-range sealing design of full-gasket equipment, the gaskets only contact clean media such as water and thermal oil without exposure to acid, alkali or salt corrosion, which greatly extends service life and reduces replacement frequency. Materials including EPDM, NBR and fluororubber can be selected to adapt to conventional media at different temperature ranges.

Pressure-resistant fastening frames consist of fixed end plates, movable end plates, high-strength tie rods and locking nuts. The frame provides uniform clamping force for stacked plate groups to ensure tight sealing on the gasket side and restrain the internal welded structure from structural tension caused by medium pressure. Made of thickened anti-corrosion plates, the frame features high rigidity for long-term operation under medium and high pressure. During maintenance, loosening the nuts pushes open the movable plate for channel cleaning, descaling and gasket replacement without damaging the internal welded structure.

Flow guiding and limiting components include plate positioning grooves and fluid guiding zones. The grooves ensure accurate stacking and alignment of welded plate pairs to avoid flow deviation and uneven heat transfer caused by channel misalignment. The optimized flow guiding structure evenly distributes medium flow to cover the entire plate surface, improve heat transfer efficiency and prevent excessive local flow velocity from scouring plates and welds.

Inlet and outlet nozzles and partition sealing strips are functional auxiliary parts. The partition strips accurately separate welded channels and gasket channels, completely isolating two different media and preventing cross-flow and mixing. Standardized nozzles are compatible with conventional industrial pipelines with stable connection and excellent pressure resistance, forming independent access channels for corrosive and clean media respectively.

Adopting the composite design of "welding for corrosion resistance + gasket for maintainability", the components effectively solve industrial pain points including easy leakage in corrosive environments, difficult cleaning of fully welded equipment and poor pressure resistance of ordinary gasket equipment. Balancing safety, energy efficiency and maintainability, this structure is widely applied in fine chemical industry, industrial cascade refrigeration, seawater desalination and waste liquid heat recovery scenarios.