Description

The YAMATAKE EST0240Z05WBX00 represents a precision-engineered electric rotary actuator from Azbil Corporation (formerly Yamatake), designed for critical flow control applications in process automation. As part of the renowned EST Series, this quarter-turn actuator integrates robust torque delivery (240 Nm) with advanced modulating control, enabling precise angular positioning of butterfly valves, ball valves, and dampers in demanding industrial environments. Its IP67-rated aluminum housing ensures resilience against dust, moisture, and corrosive atmospheres, while the maintenance-free brushless DC motor guarantees long-term reliability with minimal service interruptions. The EST0240Z05WBX00 features dual-position feedback (4–20 mA analog + open/close limit switches) and supports Modbus RTU communication for seamless integration into DCS/PLC networks.

Engineered for safety-critical systems, this actuator includes torque overload protection and manual override capabilities for fail-safe operation during power loss. Its compact design optimizes space in skid-mounted equipment, while the field-adjustable stroke time (5–75 seconds) accommodates diverse process dynamics. The YAMATAKE EST0240Z05WBX00 delivers exceptional repeatability (±0.5% of span), making it ideal for applications demanding precise flow modulation in oil & gas, power generation, and chemical processing plants.

Technical Specifications

Main Features and Advantages

High torque precision: The YAMATAKE EST0240Z05WBX00 delivers 240 Nm torque with ±0.5% repeatability, ensuring accurate valve positioning even under fluctuating line pressures. Its anti-backlash gearing eliminates deadband, critical for chemical dosing or energy balancing applications.

Integrated intelligence: Onboard diagnostics monitor motor temperature, torque overloads, and signal integrity, triggering pre-alerts via Modbus to prevent unscheduled downtime. The dual-sealed conduit entries (M20 x 1.5) eliminate moisture ingress risks in washdown areas.

Operational flexibility: Field-configurable fail-action (open/close/stop on loss of signal) and adjustable torque limits protect valves from damage. The manual override handwheel enables safe maintenance without system depressurization. Compared to pneumatic alternatives, the EST0240Z05WBX00 reduces energy costs by 40% and eliminates air supply dependencies.

Robust construction: Marine-grade aluminum housing with stainless steel shafts resists salt spray and chemical corrosion. Vibration-dampened mounting suits compressor discharge lines or pump skids.

Application Field

The YAMATAKE EST0240Z05WBX00 excels in process-critical flow control scenarios. In LNG terminals, it modulates cryogenic ball valves (-196°C) for tank farm inventory management, leveraging its low-temperature resilience. Power plants deploy it for FD/ID damper control in boiler systems, where its 5-second fast stroke mitigates combustion instability.

Chemical processing: Precise throttling of corrosive fluid lines (acids, solvents) using PTFE-lined butterfly valves, with Modbus integration enabling batch recipe automation. The IP67 rating withstands aggressive washdowns in API manufacturing.

Water treatment: Controls sludge control valves in clarifiers, with torque overload protection preventing jams from debris. Municipal HVAC systems utilize its modulating capability for chilled water balancing.

Oil & gas wellheads: Manages emergency shutdown (ESD) valves, where fail-safe action and SIL 2 compliance ensure safety integrity. The actuator’s explosion-proof variants (not this model) serve in Zone 1 areas.

Related Products

EST0120Z05WBX00: 120 Nm torque variant for smaller valves

EST0240Z05WCX00: 240 Nm actuator with 200–240V AC supply

EST0360Z07WBX00: 360 Nm high-torque model for large dampers

YTA510 Temperature Transmitter: Complementary process instrument for thermal protection

Azbil VJ3000 Control Valve: Optimized assembly with EST0240Z05WBX00 actuator

EST-ETH Modbus Gateway: Adds Ethernet/IP connectivity to EST Series

ESR Series On/Off Actuators: Simplified solution for non-modulating duties

Yamatake J3000 Positioner: Enhances precision for pneumatic alternatives

YAMATAKE EST0240Z05WBX00

Installation and Maintenance

Pre-installation preparation: Verify valve flange compatibility (ISO 5211 F10 mounting pad). Ensure power supply stability (±10% voltage tolerance) and install a 5A slow-blow fuse in the supply line. Calibrate mechanical stops to align with actuator end positions before power-up. Use shielded cables for 4–20 mA signals with single-point grounding.

Maintenance recommendations: Conduct torque calibration checks annually using a certified torque wrench. Inspect shaft seals quarterly for lubrication leaks in dusty environments. Test manual override functionality during planned outages. Monitor Modbus error codes via SCADA for early fault detection. Replace grease (Molykote EM-30L) every 50,000 cycles in high-duty applications.