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Description
Technical Specifications
| Product Model | 812.201-M DN50 (ECOTROL Series) |
|---|---|
| Manufacturer | ARCA Regler GmbH (Germany) |
| Product Type | Pneumatic Single-Seat Globe Control Valve (Final Control Element) |
| Valve Size | DN50 (Nominal 2 inch / NPS 2″) |
| Pressure Rating | PN16, PN25, PN40, PN63 (Class 150 / 300 optional) |
| Body Material | Cast Steel (WCB / 1.0619), Stainless Steel (CF8M / 1.4408), others on request |
| Trim Type | Characterized Plug (Equal %, Linear, Quick Open), Balanced or Unbalanced |
| Seat Leakage Class | ANSI/FCI 70-2 Class IV (Metal) / Class VI (Soft Seat) |
| Actuator Type | ARCA Multi-Spring Diaphragm Actuator, Size M (Fail-Safe Spring Return) |
| Actuator Supply Pressure | 1.4 bar to 2.5 bar (20–36 psi) typical; max 4.0 bar |
| Operating Temp. Range | -40 °C to +250 °C (standard), up to +450 °C with extension bonnet |
| End Connection | Flanged acc. EN 1092-1 / ASME B16.5 (Raised Face or Ring Type Joint) |
| Stroke Length | 20 mm (DN50 std.) or 30 mm depending on trim selection |
| Accessory Compatibility | ARCA TZID / TZID+ Smart Positioner, Limit Switches, I/P Transducer, Solenoid |
Main Features and Advantages
Top-guided stability under high ΔP: The ARCA Regler 812.201-M DN50 employs a robust top-stem guide bushing that centers the plug assembly and absorbs lateral hydrodynamic forces generated by high-pressure-drop throttling. This design significantly reduces the risk of stem galling, vibration-induced trim wear, and hunting—common issues with bottom-guided or unguided single-port valves—making the ARCA Regler 812.201-M DN50 especially suitable for steam desuperheating and pressure-reducing stations.Modular ECOTROL design for low lifecycle cost: One of the defining strengths of the ARCA Regler 812.201-M DN50 is its interchangeability. The same valve body accepts multiple plug/stem/bonnet combinations, cage-retained or threaded seat rings, and various packing types (PTFE, graphite, high-temp braided). This means process changes—such as a shift from equal-percentage to linear characteristic—can be accommodated by swapping trim only, without removing the valve body from the pipeline. The actuator’s modular spring cassette is likewise field-adjustable for rangeability and fail-action reversal.Fail-safe pneumatic actuator with wide thrust envelope: The size-M multi-spring diaphragm actuator fitted to the ARCA Regler 812.201-M DN50 delivers ample seating force to achieve ANSI Class IV shutoff even at rated differential pressure. Spring opposition allows the valve to drive to a predetermined safe position (open or closed) on loss of instrument air, protecting the process and personnel. Actuator benchtops are clearly marked and adjustable without special tooling.Excellent rangeability and controllability: With properly selected characterized plugs, the ARCA Regler 812.201-M DN50 achieves a typical turndown ratio of 50:1, enabling accurate control across both high-load and trickle-flow conditions. When paired with an ARCA TZID smart positioner, the valve benefits from auto-calibration, friction compensation, and digital diagnostics that alert maintenance teams to packing wear or actuator hysteresis before a failure occurs.
Application Field
The ARCA Regler 812.201-M DN50 is widely deployed as a modulating control valve in process industries where precise regulation of thermal or fluid energy is essential. In chemical and pharmaceutical plants, the ARCA Regler 812.201-M DN50 is used to control reactor jacket heating/cooling media (steam, glycol, brine), utility water injection, and solvent feed lines where ANSI Class IV metal-seated shutoff prevents cross-contamination between batches. Its stainless-steel body option and broad sealing material choices allow it to handle mildly corrosive process fluids without the premium cost of exotic-alloy special valves.In power generation auxiliaries and cogeneration plants, the ARCA Regler 812.201-M DN50 frequently appears in boiler feedwater bypass lines, deaerator level control, condensate recovery, and desuperheater attemperator loops where rapid response to temperature/pressure deviations is critical. The valve’s ability to withstand thermal shock and cycling—especially when specified with an extended bonnet for high steam temperatures—makes it a reliable choice for turbine bypass and extraction control as well.Within HVAC and building management systems for large campuses, hospitals, or data centers, the ARCA Regler 812.201-M DN50 modulates chilled water, heating hot water, and condenser water flows in primary/secondary pumping schemes. Facilities engineers appreciate that the ARCA Regler 812.201-M DN50 can be serviced inline (plug and seat replaced without unflanging the body in many cases) and that its standardized accessor mounting pattern accepts modern smart positioners for integration into BACnet or Modbus-based BMS networks via appropriate I/O translators. In all these scenarios, the valve solves the core pain point of balancing tight process control with manageable maintenance overhead in a compact footprint.
