Systems & Skids

Packaged systems and skids are used in industrial steam, condensate, and thermal process networks where a defined operating sequence of equipment, instrumentation, and controls is required. Selection is based on steam or condensate flowrate, inlet and outlet pressure, temperature, available NPSH, boiler feedwater quality, level-control requirements, materials of construction, and site installation constraints. The category includes DIN and ANSI executions, PN16 and Class 150 pressure ratings, and flanged, NPT, and ISO 7 Rp connections, with materials such as carbon steel and stainless steel.

Pressure-reducing stations are applied on steam lines where downstream process pressure must remain stable upstream of heat exchangers, humidifiers, distribution manifolds, or other consumers. A pressure-reducing skid should be evaluated as a complete assembly: pressure reducing valve or control valve, overpressure protection, strainer, drainage, pressure gauges, bypass line, control instruments, and pressure relief arrangement.

Condensate recovery and return systems typically include a receiver vessel, pumps, valves, level instrumentation, and high- and low-level protection. For the ARI CORsys range, receiver capacities of 150 to 2000 l are specified, with a standard version in S235JRG2 and a stainless steel version in 1.4541 / 1.4401. Maximum allowable temperature is up to 95°C, with design and manufacturing in accordance with PED 2014/68/EU.

Prefabricated units such as ADCA ECRU, ECRUV, PWHU, FRECO, and QuickEM drainage modules are used where standardized installation is required, including pipework, flanges, gaskets, isolation valves, bypass, and instruments. QuickEM assemblies incorporate a steam trap, sight glass, check valve, stop valve, and bypass pipe, and can be installed in either horizontal or vertical orientation.

Maintenance should be based on differential pressure checks, steam trap operation, vessel level verification, valve seat leakage assessment, pump condition monitoring, and validation of instruments and sensors. In steam systems, particular attention is required for water hammer, flash steam, correct drainage, and safe pressure letdown or venting.