Archives

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