BIFFI OLGA/OLGAS Hydraulic Actuators

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

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.