
KOREX manufactures AIR-SEP® pressure maintenance stations for pressure maintenance, expansion, degassing and make-up water supply in heating, cooling and refrigeration systems.
KOREX Verfahrenstechnik GmbH
Gilching near MunichNew on Amplifa
About KOREX Verfahrenstechnik
KOREX Verfahrenstechnik GmbH, based in Gilching near Munich, develops, produces and distributes energy- and cost-saving devices and systems for performance optimization of heating, cooling and solar systems. The core product is the AIR-SEP® pressure maintenance station, which combines pressure maintenance, expansion, adiabatic degassing, fully automatic make-up water supply and cleaning in a single unit. The systems are used in closed heating systems, chilled water cooling systems, systems with antifreeze agents, deep-freeze circuits down to -50 °C as well as in local and district heating systems. The stainless steel expansion and degassing vessel is made of material 1.4301, the cladding made of Sendzimir galvanized sheet steel; for aggressive media the company delivers the systems completely in stainless steel, including the pressure maintenance pump, overflow valve, lid, bases and claddings. In addition, system accessories such as magnetite filters, water treatment, make-up unit PRO and individual custom solutions up to the megawatt performance range are offered. Manufacturing takes place at the location in Germany, distribution in Germany via the three-stage specialized wholesale trade as well as to 12 European countries with 21 service points.
- Site
- Gilching
- Processes
- Development and production of AIR-SEP® pressure maintenance stations (pressure maintenance,, AIR-SEP® thermal pre-degassing unit (patented) for deep-freeze circuits down to -50°C, Manufacture of AIR-SEP® systems completely in stainless steel for aggressive media (pressure, Consulting/design (online design), Development, production and distribution of pressure maintenance stations, Maintenance by factory customer service, Custom solutions/individual system construction, Sales representatives/distribution via specialized wholesale trade
- Materials
- Stainless steel (expansion/degassing vessel), Sendzimir galvanized sheet steel (cladding), Stainless steel (centrifugal pump: shaft, impellers, chambers), Stainless steel 1.4301, Sendzimir galvanized sheet steel
- Certificates
- Design according to VDI 4708 and DIN EN 12828, Accessories according to DIN 1988 / DIN EN 1717 with DVGW-tested system, Annual maintenance by factory customer service (warranty up to 5 years)
- Industries
- Heating industry, Refrigeration and air conditioning technology, Local and district heating, Solar systems, Plant engineering
- 01
Consulting and online design
- 02
Development and construction
- 03
Manufacture of vessels and assemblies (stainless steel 1.4301, galvanized sheet
- 04
Assembly and wiring of the pressure maintenance stations
- 05
Factory pre-setting
- 06
Distribution via specialized wholesale and sales representatives
- 07
Maintenance by factory customer service
Materials and Processes
Stainless steel 1.4301
Material of the expansion and degassing vessel as well as media-carrying assemblies such as pump shaft, impellers, chambers, lid and bases.
Sendzimir galvanized sheet steel
Material of the anthracite-grey, distance-mounted cladding with insulating effect.
Location

Gilching
DEHeadquarters with development, production and sales
- Part weight / size
- Device weight 81–536 kg (type AS-T 100 to 2400)
- Materials
- Stainless steel 1.4301, Sendzimir galvanized sheet steel
Products and Components






Inside the production





Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Development and production of AIR-SEP® pressure maintenance stations (pressure maintenance,Engineering | – | – | – | – | Stainless steel 1.4301, Sendzimir galvanized sheet steel |
| AIR-SEP® thermal pre-degassing unit (patented) for deep-freeze circuits down to -50°CEngineering | – | – | – | – | Stainless steel |
| Manufacture of AIR-SEP® systems completely in stainless steel for aggressive media (pressureAssembly | – | – | – | – | Stainless steel |
Additional services
Quality
AIR-SEP® pressure maintenance stations are designed according to VDI 4708 and DIN EN 12828. The factory completely pre-set and wired devices are monitored via the SmartControl control system with pressure sensors, pressure transducers and level sensors.
| Evidence | Gilching |
|---|---|
| Design according to VDI 4708 and DIN EN 12828 | |
| Accessories according to DIN 1988 / DIN EN 1717 with DVGW-tested system | |
| Annual maintenance by factory customer service (warranty up to 5 years) |
Company History
- 1976
Development of the first AIR-SEP® process; KOREX Verfahrenstechnik GmbH took over the complete know-how including development, production and sales.
- 2025
AIR-SEP® pressure maintenance stations of the 5th generation with new dynamic overflow unit available.