Description

Metso Neles B1JU10/25 Pneumatic Rotary Actuator

Technical Specifications

• Product Model: B1JU10/25
• Brand: Metso (Neles)
• Warranty: One Year
• Input Voltage: Pneumatic instrument air supply, no electrical power
• Operating Temperature: ‑25 °C ~ +70 °C
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: 0.4‑1.8 s full 90° stroke (depends on air supply flow)
• Protection Class: IP66
• Accuracy Class: ±1° mechanical rotary stroke accuracy
• Output Frequency: Not applicable
• Rated Current: Not applicable (pneumatic actuation)
• Actuator Type: Double‑acting piston rotary quarter‑turn actuator
• Rated Torque: B1J series base torque rating; max working supply pressure 10 bar
• Supply Pressure Range: 4‑10 bar dry filtered instrument air
• Rotation Stroke: Standard 90‑degree quarter‑turn travel
• Mounting Interface: ISO 5211 valve mounting standard
• Housing Material: Cast aluminum alloy, corrosion resistant surface treatment
• Sealing: Standard‑range temperature sealing compound
• Humidity: 0‑100 % RH, outdoor plant environment acceptable
• Weight: 38 kg
• Dimensions: 525 × 370 × 245 mm

Product Overview

The B1JU10/25 is part of Metso Neles B‑series heavy‑duty double‑acting pneumatic rotary actuator portfolio. The suffix “/25” indicates‑25 °C low‑temperature sealing configuration for cold climate industrial sites. Double‑acting structure holds valve position when instrument air is lost; no spring‑return fail‑safe function built‑in.

This piston‑type rotary actuator delivers stable high torque for quarter‑turn ball, butterfly and plug valves. Hard‑anodized aluminum housing provides mechanical strength and corrosion resistance for field installation. It supports direct assembly with Metso valve positioners, solenoid valves and limit‑switch boxes to achieve on‑off or modulating valve control. Robust mechanical design withstands frequent cyclic operation for long‑term plant service. Mainly supplied as spare parts for existing valve automation retrofits and maintenance projects.

Application Notes

• Instrument air shall comply with ISO 8573‑1 cleanliness and dryness requirements. ‑25 °C sealing kit is dedicated for cold‑climate sites; do not mix with arctic‑grade‑55 °C seal components.
• Mount to quarter‑turn valves following ISO 5211 standard dimensions.
• Fit certified ATEX accessories for hazardous classified area installations.
• Regular inspection and lubrication are required for high‑cycle working conditions.
• Typical deployment: oil & gas transfer stations, petrochemical plants, pulp‑and‑paper mills, energy‑industry valve automation in cold‑temperate zone sites.