ROTORK RC220-SR087 – Electric Quarter-Turn Actuator with Reinforced Corrosion Protection | RC Series Platform
Engineering Background
The ROTORK RC Series represents ROTORK’s compact, cost-effective quarter-turn electric actuator platform, engineered for valve automation in process industries where space constraints, environmental exposure, and operational reliability are primary concerns. The RC220 variant delivers 220 N·m of output torque, making it suitable for butterfly valves, ball valves, and dampers in DN50–DN200 pipelines.
Product Positioning
The RC220-SR087 is a factory-configured variant with the SR087 spring-return module and reinforced corrosion protection coating, designed for outdoor installations, coastal environments, chemical processing zones, and any application where standard IP protection is insufficient. The F05/F07 dual-flange interface with 14mm square drive shaft ensures direct ISO 5211 compatibility across a wide range of valve brands without adapter plates.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model | RC220-SR087 |
| Series | ROTORK RC Series |
| Output Torque | 220 N·m |
| Operation Type | Quarter-Turn (90°), Electric |
| Spring Return Module | SR087 (Fail-Safe Spring Return) |
| Flange Interface | F05 / F07 (ISO 5211) |
| Drive Shaft | 14mm Square |
| Corrosion Protection | Reinforced (Enhanced Coating System) |
| Enclosure Rating | IP67 (standard), IP68 optional |
| Ambient Temperature | -20°C to +70°C |
| Supply Voltage | 24V DC / 110V AC / 230V AC (specify on order) |
| Control Signal | On/Off or Modulating (4–20mA) |
| Position Feedback | Potentiometer / NAMUR switches |
| Manual Override | Handwheel (standard) |
| Housing Material | Aluminium Alloy, Epoxy Coated |
| Weight (approx.) | ~8.5 kg |
| Certifications | CE, ATEX (Ex variant available) |
Proven Application Environments
- Chemical & Petrochemical Plants — corrosive gas/liquid pipelines requiring fail-safe valve closure
- Offshore & Coastal Installations — salt-spray environments where standard coatings degrade prematurely
- Water & Wastewater Treatment — outdoor valve stations with high humidity and UV exposure
- Power Generation — cooling water systems and fuel gas isolation valves
- Pulp & Paper / Mining — abrasive and chemically aggressive process media
- HVAC & Building Automation — large damper and chilled water valve control
Engineering Advantages
- Reinforced Corrosion Protection — multi-layer epoxy primer + polyurethane topcoat system exceeds standard RC Series coating; validated for C4/C5 corrosivity categories per ISO 12944
- SR087 Fail-Safe Spring Return — guaranteed valve closure (or opening) on power loss without external pneumatic supply; spring torque pre-calibrated at factory
- Dual F05/F07 Flange — single unit covers two ISO 5211 flange sizes, reducing spare-parts inventory and simplifying cross-valve compatibility
- Compact Footprint — RC Series geometry minimises installation envelope vs. pneumatic alternatives; no air supply infrastructure required
- Integrated Limit Switches — NAMUR-compliant switches provide direct PLC/DCS interface without signal conditioning
- Low Maintenance Design — sealed gearbox with lifetime lubrication; no scheduled lubrication intervals
System Architecture & Signal Flow
The RC220-SR087 integrates directly into standard industrial control architectures:
- DCS/PLC Output → 24V DC discrete signal or 4–20mA analogue → RC220 control board → Motor drive → Valve position
- Position Feedback: Potentiometer (0–10V or 4–20mA) or NAMUR limit switches → DCS/PLC digital input card
- Fail-Safe Path: Power loss detected → SR087 spring releases → Valve driven to safe position (open or closed, factory-set) → NAMUR switch confirms position → DCS alarm acknowledged
- Manual Override: Handwheel declutches motor; position indicator confirms valve state during maintenance
Compatible with Siemens S7, Rockwell ControlLogix, Honeywell Experion, ABB 800xA, and all standard 24V DC / 4–20mA I/O systems.
Sourcing & Quality Verification
- Units sourced through authorised ROTORK distribution channels with full traceability documentation
- Each unit ships with original ROTORK factory test certificate and serial number verification
- Batch inspection available: dimensional check, torque output verification, limit switch calibration, IP rating test report
- Counterfeit risk mitigation: serial numbers verified against ROTORK global registry prior to dispatch
- Lead time: ex-stock units ship within 3–5 business days; non-stock configurations 4–8 weeks
Procurement Process
- Enquiry — Submit model number, required voltage, control signal type, and quantity to support@konmask.com
- Quotation — Formal quotation with lead time, unit price (HKD/USD), and datasheet issued within 1 business day
- Order Confirmation — Purchase order accepted; proforma invoice issued for payment
- Quality Inspection — Pre-shipment inspection report provided upon request
- Shipment — DHL / FedEx / sea freight with full tracking; export documentation (CO, packing list, commercial invoice) included
- After-Sales — 12-month warranty; technical support via email and WhatsApp
Technical FAQ
Q: What is the difference between RC220 and RC220-SR087?
A: The RC220 is the base model. The SR087 suffix denotes the integrated spring-return module (fail-safe function). Without SR, the actuator is non-fail-safe (power-to-operate only).
Q: Can the fail-safe direction be changed on-site?
A: The fail-safe direction (fail-open or fail-closed) is factory-set. Field reversal is possible on some configurations but requires ROTORK service authorisation. Specify required fail direction at time of order.
Q: Is this unit suitable for ATEX Zone 2 installations?
A: The standard RC220-SR087 is non-ATEX. An Ex-rated variant is available — please specify ATEX category and gas group when enquiring.
Q: What valve brands are directly compatible with F05/F07 14mm?
A: Directly compatible with Flowserve, Emerson (Fisher), Metso, Bray, Ebro, and most ISO 5211 compliant butterfly and ball valves in DN65–DN200 range.
Q: Do you provide commissioning support?
A: Remote commissioning guidance is provided free of charge. On-site commissioning can be arranged for large projects — contact us for details.
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Contact: support@konmask.com | +0086 19859288691
