Description

Metso (Neles) B1CU13/55 Double‑Acting Pneumatic Rotary Actuator

Technical Specifications

• Product Model: B1CU13/55
• Brand: Metso (Neles)
• Warranty: One Year
• Input Voltage: Pneumatic supply, no electrical power required
• Operating Temperature: ‑55 °C ~ +70 °C (arctic‑low‑temperature variant)
• Storage Temperature: ‑60 °C ~ +85 °C
• Response Time: Stroke completion 0.5‑2 s (depends on air supply capacity)
• Protection Class: IP66 / IP67
• Accuracy Class: Rotary positioning grade, ±1° mechanical stroke accuracy
• Output Frequency: Not applicable
• Rated Current: Not applicable (pneumatic)
• Actuator Type: Double‑acting piston‑style rotary actuator
• Torque Output: B1C13 base torque rating, max supply pressure 10 bar
• Supply Pressure: 4‑10 bar clean, dry instrument air
• Rotation Stroke: 90‑degree standard rotary travel
• Shaft Interface: ISO 5211 compliant valve mounting interface
• Housing Material: High‑strength cast aluminum, corrosion‑resistant coating
• Humidity: 0‑100 % RH, suitable for outdoor plant environment
• Weight: 65 kg
• Dimensions: 640 × 445 × 280 mm

Product Overview

The B1CU13/55 belongs to Metso Neles B‑series heavy‑duty double‑acting pneumatic rotary actuator family. The suffix “‑55” denotes arctic‑grade low‑temperature construction designed for extreme cold‑climate installations, suitable for valve control in freezing outdoor environmentsManualsLib.

It delivers high rotary torque for quarter‑turn valves including ball valves, butterfly valves and plug valves. Double‑acting design maintains valve position upon loss of air supply (stay‑put behaviour); no built‑in spring return. Robust piston‑driven structure ensures long service life under frequent cyclic operation. Hard‑anodized aluminum housing and special low‑temperature sealing compounds prevent seal brittleness at‑55 °C ambient conditions. It can be assembled with positioners, limit‑switch boxes and solenoid valves to realize modulating control or on‑off valve functions. Widely used for new‑build projects and spare‑part replacement for legacy valve installations.

Application Notes

• Requires clean, dry instrument air filtered to ISO 8573‑1 standards.
• “‑55” version is specified for arctic cold‑site applications; do not interchange with standard‑temperature sealing kits.
• Mount directly onto quarter‑turn valves complying with ISO 5211 mounting standard.
• Pair with Metso/Neles valve positioners for modulating control loops; fit limit‑switch assemblies for open‑close feedback.
• Perform periodic lubrication and seal inspection for heavy‑cycle service.
• Suitable for outdoor installation; compatible with hazardous‑area accessories when configured with ATEX certified accessories.
• Typical deployment: oil‑gas pipelines, LNG facilities, mining sites, petrochemical plants in cold‑region projects for quarter‑turn valve automation.