Product Short Description
Product Name: Yokogawa AFV10D-S41101 Pneumatic Control Valve Actuator
Product Introduction: The AFV10D-S41101 is a diaphragm-type pneumatic actuator manufactured by Yokogawa Electric Corporation. It is designed to drive rotary control valves (quarter-turn) in process control applications. The suffix breakdown: AFV10D = actuator series, S = spring-return (fail-safe), 41 = 4–20 mA to pneumatic converter (I/P), 101 = specific torque/spring range variant.
Description
Technical Specifications:
- Type: Diaphragm pneumatic actuator (rotary, quarter-turn)
- Action: Spring-return (fail-close or fail-open, per configuration)
- Supply Pressure: 1.4 – 7.0 bar (20 – 100 psi)
- Output Torque: 100 Nm (standard variant) — “10” in model number
- Stroke: 90° (quarter-turn)
- Input Signal: 4–20 mA (via I/P converter) or 20–100 kPa pneumatic
- Ambient Temperature: -20°C to +80°C
- Protection Rating: IP66 / IP67 (NEMA 4X)
- Enclosure: Aluminum alloy, epoxy-coated
- Standards: IEC 60534, SIL 2 capable (IEC 61508/61511)
Functional Features:
- Built-in I/P converter (4–20 mA → 20–100 kPa)
- Visual position indicator (0–90°)
- Adjustable spring range
- Lock-up valve option for emergency shutdown
- Position transmitter option (4–20 mA feedback)
Performance Parameters:
- Stroke Time: 3 – 15 seconds (adjustable via flow control)
- Air Consumption: <8 Nl/cycle
- Hysteresis: <1% of stroke
- Dead Band: <0.5% of stroke
- MTBF: >100,000 hours
Material Composition:
- Housing: Cast aluminum alloy, epoxy-coated
- Diaphragm: Nitrile rubber (NBR) or EPDM
- Springs: Stainless steel 316
- Shaft: Stainless steel 316
Structural Features: Direct mount to valve per ISO 5211 / IEC 60534. Dimensions per torque rating. Weight approximately 12–18 kg.
Working Principle: A 4–20 mA signal from the controller is fed to the built-in I/P converter, which generates a proportional pneumatic pressure (20–100 kPa). This pressure acts on the diaphragm, creating torque to rotate the valve. The spring provides the return force for fail-safe operation. When signal is lost, the spring drives the valve to the safe position.
Key Advantages: Integrated I/P converter eliminates need for a separate converter. SIL 2 certified for safety instrumented functions. Compact and lightweight.
Applicable Industries: Oil & gas, chemical, power generation, water treatment, pulp & paper.
Model Series: Yokogawa AFV10D / Rotork-style diaphragm actuator family
Installation Requirements: Mount per ISO 5211 to valve with matching flange. Supply air must be clean, dry, oil-free (ISO 8573-1 Class 1.4.1). Adjust stroke time via needle valve.
Usage Precautions: Verify spring direction (fail-open vs fail-close) matches safety requirement. Do not exceed supply pressure of 7 bar. Lubricate shaft packing periodically.
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