Schmidt Bretten Heat Exchangers

Schmidt Bretten - commonly referred to simply as Schmidt, and operating today as API Schmidt-Bretten, part of API Heat Transfer since its 1997 acquisition - is a long-established German manufacturer of gasketed and brazed plate heat exchangers, headquartered in Bretten, Germany. Schmidt plate heat exchangers, built around the well-known SIGMA product line, are used worldwide for lube oil cooling, bearing cooling, boiler blow-down recovery, cooling tower isolation, and general industrial, HVAC, food, and beverage heat transfer duties. SRJ manufactures replacement plates and gaskets engineered to match the original port geometry, plate corrugation, and gasket groove profile used across the Schmidt Bretten SIGMA M, S, STAR, and SX series, so units already installed in your plant can be re-plated and re-gasketed without any change to the existing frame.

Our Schmidt Bretten (Schmidt) compatible plates are available in stainless steel and Titanium, matching the material grades used across the SIGMA range, and gaskets are supplied in NBR, EPDM, and Viton (FKM) compounds in both adhesive-free (clip/snap) and glued fixing formats, matching Schmidt's own SIGMAFIX-style gasket system. Every plate and gasket is dimensionally checked and pressure-tested before dispatch, giving plant engineers and procurement teams a reliable, drop-in alternative to long OEM import lead times.

SRJ manufactures replacement plates and gaskets compatible with Schmidt Bretten (Schmidt) plate heat exchangers, pressed on tooling matched to original port position, plate corrugation, and gasket groove geometry across the SIGMA range, including SIGMA M-series (M25 through M306), SIGMA S-series (S7 through S156), SIGMA STAR-series (STAR 32/35/45/90), and SIGMA SX-series (SX13/19/29/49) plate types. Because each plate replicates the original clamping dimension and port layout, it seats correctly on the carrying and guiding bars of your existing frame and holds the correct plate pack length, without requiring any modification to the frame, tightening bolts, or support column.

The Schmidt SIGMA range uses a distinctive wave-pattern corrugation pressed into each plate, engineered to generate turbulent flow and even fluid distribution across the full plate surface, allowing the unit to achieve a true counter-current heat transfer principle even where hot and cold fluid temperature differences are small. Schmidt Bretten also offers specialised plate variants within the SIGMA family: the SIGMAFIT series is optimised for homogeneous retention-time behaviour, suited to food and industrial applications involving liquids with small solid particles; the X-series uses a thinner, high-heat-transfer-coefficient plate for pure, solid-free liquids; and the T-series uses larger gap heights to allow coarse solid particles, vapour condensation, or gas cooling/heating duties where a wider flow channel is required.

SRJ's tooling reproduces this wave-pattern corrugation and flow-distribution geometry, so a replacement plate does not compromise the pressure drop or heat transfer performance the Schmidt unit was originally designed to deliver. Gaskets on genuine Schmidt units are typically fitted using an adhesive-free snap/clip fastening system (SIGMAFIX-style) for fast, tool-free maintenance, or as bonded high-performance seals for more demanding duty; SRJ manufactures gaskets to match whichever fixing method your original Schmidt plates use, so plate pack reassembly during maintenance proceeds exactly as your team is accustomed to.

Material selection for Schmidt Bretten-compatible plates includes stainless steel (SS304/316) for standard industrial and process applications, and Titanium for units handling more aggressive or corrosive media. Gaskets are available in NBR for oils and hydrocarbon-based media, EPDM for water and general process duties, and Viton (FKM) for higher-temperature or chemically aggressive conditions - matching the wide material selection Schmidt itself offers across its SIGMA plate and gasket range.

SRJ's in-house Noida facility allows Schmidt Bretten (Schmidt) compatible plates and gaskets to be manufactured to order, supporting both recently installed SIGMA M/S/STAR/SX-series units and older Schmidt installations where genuine German OEM spares may involve longer import lead times and higher landed costs. Every production batch is backed by our ISO 9001:2015 certified quality process - dimensional and flatness checks on plates, groove-fit verification on gaskets, and pressure testing of assembled plate packs on request - giving your procurement team a documented basis for approving non-OEM Schmidt Bretten-compatible parts.

Don't see your exact model listed? Send us your nameplate details or an existing plate sample - we manufacture to your specific Schmidt Bretten (Schmidt) unit's dimensions, including older or discontinued models.