• /
API Schmidt-Bretten SIGMA Plate heat exchangers and components
API Heat Transfer is one of the world's largest full-service manufacturers of industrial heat exchangers and heat transfer systems. Today, API Heat Transfer operates out of state-of-the-art manufacturing facilities located in the United States, England, Germany and China.

The combination of more than 140 years of experience and sales of over 100,000 plate heat exchangers has made API Schmidt-Bretten one of the most competent and efficient partners in the heat exchanger industry. A wide range of SIGMA plate heat exchanger designs are available with different surface area, corrugation, plate material, plate thickness and gasket material.
Advantages of plate heat exchangers API SIGMA
  • Heat Transfer Performance
    The unique designs of our thermal plates produce high heat transfer coefficients for a given application, resulting in lower surface area and lower capital cost.
  • Compact Design
    Plate heat exchangers contain large heat exchanging surfaces in a very compact, space-saving frame. This results in a much smaller space requirement and lower weight.
  • Versatility
    Plates are formed in a wide variety of patterns and materials to meet your heat transfer needs.
  • Peak Efficiency
    With high heat transfer coefficients and a true counter-current flow path, our plate heat exchangers can cool hot fluids to within one degree of the cold fluid making heat recovery in excess of 96% technically and economically possible.
  • Minimal Fouling
    Fouling of the heat transfer surfaces of the plate heat exchanger is extraordinarily low. The high induced turbulence yields a self-cleaning effect, which minimizes fouling.
  • Easy Maintenance
    Units can be cleaned without dismantling by clean-in-place (CIP) systems, by reverse flow cleaning or by addition of suitable cleaning fluids. Plate removal is easily accomplished by releasing the tightening bolts that compress all of the heat transfer plates.
  • Lower Liquid Volume
    Since the gap between plates is small, a plate heat exchanger contains only low quantities of process fluids, reducing cost due to lower volume requirements.
  • Expandable
    Plate arrangement can be changed and plates can be added or removed. It is possible to install several sections in one frame and permit several process steps in a single unit.
  • Reliability
    The unique design of our plates allows for optimum alignment during assembly for greatest sealing capabilities.
What does an API SIGMA heat exchanger consist of?
Pressure Retaining Covers are designed in accordance with ASME code. These plates are designed so no external reinforcing is required. Steel pressure plates are provided with an epoxy paint finish for durability and extended life.

Piping Connections are available as studded, threaded, flanged, or sanitary clamp.
Tightening Bolt Assemblies are made of zinc-coated alloy steel or stainless steel for corrosion resistance and ease of opening. All tightening is easily done from the fixed pressure plate end of the unit.

Elastomer Gaskets can be either mechanically fixed (adhesive-free) or glued to the heat transfer plate.
Thermal Plates have integral reinforcement in the neck area of the plate. This yields greater sealing reliability and allows for greater operating pressures.

Moveable Pressure Plate allows easy access to heat transfer surfaces for simplified maintenance.

Technical characteristics of SIGMA plate heat exchangers

Thermal Plate Options

  • Suitable for industrial and HVAC applications with clean, homogeneous, solid-free liquids.
  • Thin film plates with corrugation depths between 2.0 and 3.0 mm for high thermal performance.
  • Hard and soft plate corrugation patterns in the herringbone design to provide the most economic thermal solution for each application.
  • Plates can be equipped with either the SIGMAFIX adhesive-free gasket system or with glued high performance gaskets.
  • Suitable for industrial, HVAC and liquid food applications.
  • Hard and soft plate corrugation patterns designed to provide the most economic thermal solution for each application.
  • Corrugation depths vary between 2.5 and 4.0 mm.
  • Plates can be equipped with either the SIGMAFIX adhesive-free gasket system or with glued high performance gaskets.
  • For industrial and food applications with viscous, fibrous or pulpy liquids, e.g., for pasteurization of beverages and pulpy products.
  • Free-flow plates with a corrugation depth between 4.5 and 5.5 mm.
  • Wide range of plate and gasket materials.
  • Combines the high thermal efficiency, compact design, and low volumetric liquid hold-up of a plate heat exchanger with the leak prevention of a shell and tube.
  • Ideal for ammonia applications.
Gasket Options
    • The sealing system used with our heat exchanger plates is designed as a one piece molded gasket with a vented double gasket boundary.
    • This design prevents the two process fluids from mixing and gives you added peace of mind.
    • If there are any leaks at the gasket around the plate or port areas, the leakage is to atmosphere and easily detectable.
    • Our patented, adhesive-free gasket fastening system allows quick and easy gasket replacement through laterally built-in mounting clips.
    • Ensures high resistance against front-face sticking and minimizes the risk of the gasket being stuck to the following plate.
    • The large area of contact between the mounting clips and the heat exchanger plate ensures a better attachment to the plate and a superior gasket seal.
    • SIGMACOAT gasket has a protective PTFE coating over an elastomer (NBR or EPDM) core. This ensures a highly resistant gasket against aggressive mediums at processing temperatures of up to 320°F.
    • Prolongs gasket life, which ensures production with minimum downtime.
    • Available in the patented SIGMAFIX, adhesive-free gasket fastening system.
    • Gaskets are glued into place by a computer-controlled robotic process that ensures consistent mixing and application.
    • All glued gaskets are heat cured for maximum bond strength.
    • Available for all of our standard plate heat exchangers in various gasket materials.
Markets and applications
Our long-standing experience in sophisticated applications allows us to provide our clients with custom-tailored, costeffective solutions. Our SIGMA plate heat exchangers offer industry leading solutions for a variety of thermal process applications in practically any market.

Markets Served:
  • Pharmacy and Life Science
  • Food industry
  • Beverage industry
  • Chemical and Petrochemical industries
  • Engine manufacturing
  • HVAC
  • Industrial engineering
  • Marine & Offshore
  • Automotive industry
  • Metal processing
  • Power generation
  • Pulp & Paper industry
  • Refrigeration technology
  • Renewable energies
  • Steel mills and cooking plants
  • Surface technology

About us

Viravix Group OÜ is engineering company active in food processing industry, dosing and mixing of dry ingredients and explosion protection. We know how to deliver technological solutions and projects for FMCG companies. Our clients are multinational companies on different markets in Europe, Eastern Europe and Middle East.