BIFFI ALGA/ALGAS/ALGAS-QA Pneumatic Actuators

Double-acting and spring-return pneumatic quarter-turn

actuators for on-off and modulating control of valves in

heavy-duty service. Available for output torques to

1.000.000 Nm.

General Application

ALGA, ALGAS and ALGAS-QA pneumatic actuators are

designed for on-off or modulating control of quarter-turn

ball, butterfly, plug or damper style valves.

Features

• Totally enclosed, weatherproof housing in fabricated

carbon steel for maximum strength.

• Guide bar resists transverse loads and supports the

piston rod.

• Hard chromium plated alloy steel material guarantees

corrosion protection and minimal friction.

• Polytetrafluoroethylene (PTFE)-impregnated bronze or

sintered bronze bushings provide minimal friction and

extended service life.

• Scotch yoke design with canted or symmetric torque arm

allows close working to distinctive valve torque profiles.

• External travel stops for precise angular stroke

adjustment 90° ±4° at each end of travel.

• Electroless nickel plated and polished cylinder provides

maximum corrosion resistance and reduces friction.

• Floating type piston seals provide low hysteresis and

high sensitivity, preventing sticking problems.

• ALGAS spring-return pack incorporates up to four

springs, fully encapsulated in a factory welded cartridge

ensuring personnel safety and simplifying assembly.

• ALGAS spring action can be changed easily in the field

from to close to open or vice versa.

• Special coatings for offshore or corrosive environments.