In a complete set of air separation equipment, the major online analyzers are as follows: the carbon dioxide content analyzer for the air after it exits the molecular sieve adsorber, the trace water analyzer for the air after leaving the molecular sieve device, the product oxygen purity analyzer, the trace oxygen analyzer for the product nitrogen, the argon content analyzer for the argon fraction, the trace oxygen analyzer for the product argon, the trace nitrogen analyzer for the product argon, the hydrocarbon analyzer, and various trace element analyzers.

The low-temperature regulating valves within the controlled-cooling box are either imported products or products from joint-venture manufacturers that exhibit performance equivalent to that of imported ones. Recommended manufacturers are KAMMER, SAMSON, KOSO, NELES, DEZURIK, etc. For control valves in non-critical positions, domestically-matched products are employed. A recommended manufacturer is Wuxi Gongzhuang.

Kaifeng SEPAIRThe Instrument and Electrical Co., Ltd. mainly engages in the design, assembly and installation of instrument and electrical equipment for air separation units, and is committed to the intelligentization and stable operation of air separation units to reduce operating costs.

Instrumentation and Control System（ICS）

The design of the instrumentation and control system adheres to the principles of reliability, practicality, simplicity, and high cost - effectiveness. It monitors the production process of the complete air separation equipment comprehensively and accurately to ensure reliable operation and convenient operation and maintenance. For the air separation unit, the control system mainly follows the principle of combining central centralized monitoring with local (on - site) monitoring. An operation station is set up in the central control room, taking into account the development of network technology and the requirements of the user factory's informatization management. The system employs a Distributed Control System (DCS), a Compressor Control System (CCS), and a Safety Instrumented System (SIS). The air separation unit is equipped with an independent control room, and the control system cabinets are installed within it.

The company possesses a diverse range of Distributed Control Systems (DCS).(Distributed Control System)There are several control systems available for selection. For imported products, brands such as HONEYWELL, ABB, SIEMENS, and CENTUM are included. In the case of domestic alternatives, Hollysys and Supcon are among the options. Furthermore, the air separation unit is equipped with an Uninterruptible Power Supply (UPS). This is to ensure continuous power supply to the Distributed Control System (DCS) and critical on - site instruments, thus safeguarding the safe operation of the air separation unit.

The transmitters employ the mainstream capacitive sensors, which are characterized by high precision and robust reliability. For practical applications, international leading brands including ROSEMOUNT, EJA, E+H, ABB, and SIEMENS are frequently chose

The instrumentation control system also encompasses the following components: Uninterruptible Power Supply (UPS) units, with capacities ranging from 3 to 20 kVA. The input voltage can be either approximately 380 V AC or approximately 220 V AC, while the output voltage is 220 V. AC). Shaft vibration and shaft displacement monitors for rotating equipment (ProvibTech or Bently); 5/2 and 3/2 solenoid valves (ASCO or SMC); Platinum resistance thermometers (Pt100, or domestic equivalents denoted as **); Flow meters (including standard orifice plates, multi - hole orifice plates, various types of averaging pitot tubes, and Bard type meters etc.); Level gauges (such as negative - migration differential pressure level gauges and capillary double - flange level gauges); Spring - tube pressure gauges (Model Y - 100, domestic equivalents denoted as **); Bimetallic thermometers (Model WSS - 481, domestic equivalents denoted as **), etc.

Electrical Power System

The company adheres to the fundamental principles of safety, reliability, [the specific principle here] and economy in power supply, and customizes power supply projects that can meet the satisfaction of customers. The complete power distribution equipment typically adopts a dual-circuit power supply system. Each circuit is capable of meeting the power requirements of all electrical equipment, thereby ensuring the continuity of power supply. All electrical components within the complete power distribution equipment are sourced from top domestic and international brands.

The company has outfitted the air separation electrical system with a comprehensive power automation protection device provided by [specific power department]. For the start - up of the main motor, voltage - reducing methods such as matching reactors, water resistance cabinets, or frequency converters are employed. All rotating equipment in the air separation unit is equipped with local (on - site) operation facilities. This is to ensure the timely response to unexpected malfunctions during the start - up of the air separation equipment and to safeguard the personal safety of the operating personnel.

The available types of high - voltage switchgear cabinets are as follows: GZS (KYN28A - 12) center - installed draw - out switchgear cabinets, XGN2 - 12 fixed AC three - phase metal - enclosed switchgear cabinets, TBB parallel compensation complete device sets, low - voltage distribution complete device sets (including GCS low - voltage draw - out switchgear cabinets), GGD AC low - voltage distribution cabinets, PGL AC low - voltage distribution cabinets, JT series instrument cabinets, PFX instrument protection cabinets, etc.