PNEUMATIC CYLINDER ACTUATORS, SERIES B Metso's Neles double acting and spring return B-Series piston type actuators are designed for use in both modulating control and on-off service. The series B1C and B1J are designed to ISO 5211/1 when Metso linkages are utilized. These actuators offer an extremely long cycle life and are well suited to operate almost any type of rotary valve. When "stay put" is the requirement, the double acting B1C series is the choice. This series is available in several sizes with torque outputs from 40 Nm to 100 000 Nm (29.5 lbf ft to 73 756 lbf ft) for maximum supply pressure of 10 bar (145 psi). If a failure mode is required, the spring return B1J series should be selected. This line offers a self-contained spring cartridge to provide failure in either the open or closed position. The spring return actuators are available with a mid-range spring for a 4 bar (58 psi) supply range, a lighter spring for lower supply pressure of 3 bar (44 psi) range and a stronger spring for a 5.5 bar (80 psi) range. These actuators offer torque outputs from 25 Nm to 12000 Nm (18,5 lbf ft to 8851 lbf ft) for maximum supply pressure of 8.5 bar (124 psi). Adjustable travel stops High-and-low temperature construction As with any Neles pneumatic/hydraulic actuator, adjustable travel stops are standard for both the open and closed positions. End of stroke turning angle range is 85° to 95°. Optional travel stops 0° to 90° are also available. The standard unit can be used in temperatures up to 70 °C (158 °F). High temperature construction is available for temperatures up to 120 °C (248 °F). The standard unit can be used down to -20 °C (-4 °F). A low temperature design is available for -40° to +70 °C (-40° to 158 °F ). Wear resistant bearings High quality bearings provide support on the upper and lower portions of the lever arm to reduce friction and expand the life of both the lever arm and the housing. Corrosion resistance The epoxy painted actuators have housings of rugged cast iron, with light-weight aluminum cylinders anodized for added corrosion resistance. Travel stops are stainless steel. Self-contained spring cartridge The springs in the B1J actuator are contained in a cartridge for added reliability and easy maintenance. Spring to open or close capability For applications where very fast and high sequency operation is required. ATEX compatibility Actuator construction ATEX approved. Oversized cylinder options The oversized cylinders (B1C 60, 75, 602, 752) are used whenever the supply pressure is limited, thus the actuators can achieve the required torques with a lower supply pressure level. Override options Available override devices include a manual centerpiece handle, a manual handwheel override, and a manual hydraulic override for high torque applications. Emergency shut-down Emergency Shut-Down (ESD) valves utilizing B1J actuators are offered to assure operation in the event of a fire or plant malfunction. The ESD device enables valve operational testing without cycling, see bulletin 6B21. The standard spring return actuator on the ball valve can provide spring-to-close or spring-to-open operation simply by changing the mounting position by 90°. On a high performance butterfly valve, the standard unit offers spring-to-close operation. An optional B1JA model is available for spring-to-open requirements. High cycle option

ACTUATOR, SERIES B1C Lock-out device Technical data Mechanical lock-outs are available to lock the actuator in either the open or closed position, when security considerations are necessary. Actuator type Cylider bore mm/inch Maximum shaft bore mm/inch Maximum supply pressure bar/psi Acessories and control devices A variety of accessories are available including Neles positioners and limit switches, position indicators, solenoid valves, transducers, relays, boosters and volume tanks etc. Applications: E.g. Quarter-turn valves. Compressor anti-surge and recirculate controls. Damper drivers equipped...

Cast iron Stop screw Stainless steel Materials Stainless steel Cast iron Stop screw Ductile iron + nickel Steel, zinced Antistatic ring Steel, zinced Stainless steel Ductile iron Antistatic ring Stainless steel Stainless steel Bearing unit Ductile iron + nickel Stainless steel Cylinder base Ductile iron Pointer cover Aluminum alloy Stainless steel Nitrile rubber Stainless steel Aluminum alloy, anodized Cast iron Steel, hard chrome plated Lock ring Nitrile rubber Support ring Nitrile rubber Nitrile rubber Stainless steel Nitrile rubber Steel+PTFE, Bronze+PTFE Ductile iron Steel+PTFE, Bronze+PTFE...

Stop screw Stainless steel Steel, zinced Ductile iron + nickel Steel, zinced Antistatic ring Stainless steel Ductile iron Steel, zinced Antistatic ring Stainless steel Stainless steel Stainless steel Bearing unit Ductile iron + nickel Cylinder base Ductile iron Pointer cover Nitrile rubber Aluminum alloy Stainless steel Aluminum alloy, anodized Cast iron Lock ring Steel, hard chrome plated Support ring Nitrile rubber Nitrile rubber Stainless steel Nitrile rubber Nitrile rubber Ductile iron Bronze net+PTFE Steel, zinced Bronze net+PTFE Steel, zinced Piston seal Pressure outlet valve EPDM Rubber...

Antistatic ring Stop screw Stainless steel Steel, zinced Ductile iron + nickel Steel, zinced Stainless steel Ductile iron Steel, zinced Antistatic ring Stainless steel Stainless steel Stainless steel Bearing unit Ductile iron + nickel Cylinder base Ductile iron Pointer cover Aluminum alloy Nitrile rubber Stainless steel Steel Aluminum alloy, anodized Cast iron Lock ring Steel, hard chrome plated Support ring Nitrile rubber Nitrile rubber Stainless steel Nitrile rubber Nitrile rubber Ductile iron Bronze net+PTFE Steel, zinced Bronze net+PTFE Steel, zinced Pressure outlet valve EPDM rubber Direction...

DOUBLE ACTING ACTUATOR, SERIES B1C OPERATION The linkage mechanism within the B-series actuator converts linear motion of the piston into a 90° (max. 98°) rotation of the actuator shaft. The line in the figure on the right shows torque characteristics vs. actuator shaft angle. Max. torque is achieved at β = 0° which usually corresponds to the closed position of ball and butterfly valves and where max. seat torque normally appears. Another peak is achieved at 60-80° which corresponds to the dynamic torque peak of butterfly valves. The torques in the table below show the minimum torque Mn at different...