Quarter Turn

OLGA-H/OLGAS-H

Double-acting and spring return hydraulic quarter-turn actuators for onoff and modulating control of valves in heavy duty service suitable for high pressure supply. Models available for output torques to 750,000 Nm.

Features & Benefits:

  • 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.
  • 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 between 82° and 98°.
  • 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 achieves ‘safe’ position in 0.2 second.

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.

Approvals
Safety integrity level:
(IEC 61508-1÷7:2010) – Suitable for use in SIL3 applications
Area classification:
(ATEX) - II 2GD 135°C (T4)
Enclosure standards:
(IEC 60529) - IP67M
(ANSI/NEMA 250) - NEMA 4, 4X, 6
Pressure equipment directive:
PED 97/23/EC
Machinery directive:
2006/42/EC

Technical data
Design pressure:
OLGA-H/OLGAS-H: 352 bar g maximum
OLGAS-H-QA: 250 bar g maximum
Supply medium: Hydraulic oil
Special versions for fireresistant 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: 235,000 Nm
Higher values available with special versions

Ambient temperature
Standard range: -30° C to +100° C (-20°F to + 210°F)
Extended range: -60° C to +180° C (-70°F to + 350°F)

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Technical Data Sheets

OLGA H/OLGAS H Hydraulic Actuator (Metric) (English)

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Technical Data Sheets

OLGA H/OLGAS H Hydraulic Actuator (Imperial) (English)

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Certificates, Approvals & Qualifications

ALGA ALGAS OLGA OLGAS GIG GIGS GPO OLGA H OLGAS H Ex II GD 135°C T4 (English)

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Certificates, Approvals & Qualifications

OLGA H IEC 61508 SIL 3 (English)

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Certificates, Approvals & Qualifications

OLGAS H IEC 61508 SIL 3 (English)

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Certificates, Approvals & Qualifications

EAC DoC Certificate All Pneumatic and Hydraulic Actuators (English)

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Certificates, Approvals & Qualifications

PED Module H H1 2019 07 (English)

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Certificates, Approvals & Qualifications

EN 60529 IP66, IP66M (English)

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Certificates, Approvals & Qualifications

OLGAH/OLGASH EAC CoC (Russian)

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