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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.

Installation The actuator can be mounted parallel or perpendicular to pipeline. The actuator can be installed in any convenient position including vertical, horizontal or upside down. 1.Bolt mounting bracket to actuator hand tight. Do not tighten yet. 2.Install coupling on valve. Be sure rotary stops on valve are removed or adjusted to allow actuator stops to do the stopping. 3.Install actuator and bracket to valve being sure to leave all fastener connections hand tight. If possible, stroke valve and actuator to a half open position 45° and physically shift actuator back and forth until coupling and all fasteners are relaxed then tighten all bolts and nuts. This procedure will accurately align valve stem to actuator output shaft and prolong valve stem seal life. Lift the actuator at a balance point near the center housing. Do not lift the weight of the valve, see Figure 1. 4.Cycle valve/actuator assembly and observe for smooth operation. 5.Adjust travel stops for perfect alignment in both open and closed positions. NOTICE If jackscrew override is installed, please refer to Section 3 for stroke adjustment. 6. Tubing connections – some models utilize two pistons for added power. Spring-return (single-acting) dual cylinder designs require one “jumper” to make the supply port common on both pistons. Double-acting (air to air) dual cylinder designs require two “jumpers”. Refer to Figure 2 for typical arrangement.

Introducing the Actuator The hydraulic actuator series OLGA-H was engineered and is manufactured to provide maximum torque output with minimum supply pressure. The OLGA-H actuators are suitable for any quarter turn application such as ball, plug, butterfly valves or dampers, in both on/off and modulating heavy-duty service. The actuator (see Figure 4) is made up of a weatherproof scotch yoke mechanism transforming the linear movement of the pneumatic cylinder (on closing or opening) into the rotary movement, which is necessary for operation. The angular stroke of the yoke is adjustable between 82° and 98° by means of the external mechanical stops screwed into the left wall of the mechanism housing and into the end flange of the pneumatic cylinder. The cover of the scotch yoke mechanism is arranged for the assembly of the required accessories (positioner, signalling limit switches, position transducer, etc.) by means of proper matching units. The above mentioned accessories are operated by the actuator drive sleeve. The housing of the scotch yoke mechanism has a flange with threaded holes to fix the actuator to the valve either directly or, if required, with the interposition of an adaptor flange or a mounting bracket. The actuator yoke has a hole with keyways suitable for the assembly of an insert bush the internal hole of which is machined (by Biffi or at customer care), according to the shape and dimensions of the valve stem. Biffi can supply different types of control system following customer’s requirements.

Terms and Conditions Biffi guarantees that all the items produced are free of defects in workmanship and manufacturing materials and meet relevant current specifications, provided they are installed, used and serviced according to the instructions contained in the present manual. The warranty can last either one year from the date of installation by the initial user of the product, or eighteen months from the date of shipment to the initial user, depending on which event occurs first. All detailed warranty conditions are specified in the documentation forwarded together with the product. This warranty does not cover special products or components not warranted by subcontractors, or materials that were used or installed improperly or were modified or repaired by unauthorized staff. In the event that a fault condition be caused by improper installation, maintenance or use or by irregular working conditions, the repairs will be charged according to applicable fees. The warranty and Biffi liability shall lapse in the event that any modification or tampering whatsoever be performed on the actuator. Electrostatic Charge An electrostatic charge risk is present on the actuator surface; in case of cleaning, use only antistatic cloth; in case of maintenance, avoid all rubbing/frictions that could electrostatically charge the equipment.

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. • Triple-element piston seals provide low friction, high sensitivity, ensure long life and prevent sticking problems. • OLGAS-H fully encapsulated spring-return pack ensures personnel safety and simplifies assembly. • OLGAS-H modular design enables spring action to be changed in the field easily. • OLGAS-H QA is the quick-acting spring-return hydraulic and electro-hydraulic actuators with high flow rate manifold and cylinder, integral quick exhaust valves, and end-of-stroke damper systems, designed by Biffi. • OLGAS-H QA achieves “safe” position in less than 0.3 second. This configuration can be provided with a double camber option and the name will add the suffix DC at the end.  

Double-acting and spring return hydraulic quarter-turn actuators for ON/OFF and modulating control of valves in heavy-duty service suitable for high pressure supply. Models available for output torques to 750.000 Nm. General Application OLGA-H and OLGAS-H series hydraulic actuators are designed for the control of quarter turn ball, butterfly, plug or damper style valves. Technical Data Design Pressure (MAWP) OLGA-H/OLGAS-H With standard CS: 352 barg maximum (based on actuator model,please contact the factory to receive confirmation) With optional SS: Please contact the factory OLGAS-H-QA: Contact factory MOP With standard CS tie rods:  Refer to torque table With optional SS: Please contact the factory Supply medium: Hydraulic oil, special versions for fire resistant fluids Output Torque OLGA-H: Double-Acting torque up to 750.000 Nm OLGAS-H/QA: Spring starting torque up to 335.000 Nm Spring ending torque up to 235.000 Nm Higher values available with special versions Ambient Temperature Standard range: -20 to +100 °C / -4 to +210 °F Extended range: -60 to +100 °C / -70 °F to +210 °F MAWP: Maximum Allowable Working Pressure is the pressure defined for the design of the actuator pressure containing parts. MOP: Maximum Operating Pressure is pressure that generates the torque used to engineer the mechanical loaded parts of the actuator and it is the one required to produce the Maximum Operating Torque (MOT) of the actuator.

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. • Triple-element piston seals provide low friction, high sensitivity, ensure long life and prevent sticking problems. • OLGAS fully encapsulated spring-return pack ensures personnel safety and simplifies assembly. • OLGAS modular design enables spring action to be changed in the field easily. • OLGAS-QA achieves ‘safe’ position in 0.2 seconds.  

Double-acting and spring-return hydraulic actuators for remote and local operation of valves in on/off and modulating heavy-duty service. Available with output torques up to 6.638.000 lb-in. General Application OLGA and OLGAS series hydraulic actuators are designed for the control of quarter-turn ball, butterfly, plug or damper style valves. Technical Data Design pressure (MAWP) OLGA/OLGAS: Up to 1500 psig (contact factory for PED limit) OLGAS-QA: Contact Factory Supply medium: Hydraulic oil, special version for fire-resistant fluids Output torque OLGA: Double-acting torque up to 6.638.000 lb-in OLGAS: Spring starting torque up to 2.964.000 lb-in Spring ending torque up to 2.079.000 lb-in Ambient temperature Standard range: -4 to +210 °F / -20 to +100 °C Extended range: -70 to +275 °F / -60 to +135 °C MAWP: Maximum Allowable Working Pressure is the pressure defined for the design of the actuator pressure containing parts. MOP: Maximum Operating Pressure is pressure that generates the torque used to engineer the mechanical loaded parts of the actuator and it is the one required to produce the design torque of the actuator