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OMAL Spa
Heavy Duty spring return

Heavy Duty spring return

Product catalog summary

Overview: This document outlines the technical specifications and features of OMAL S.p.a.'s heavy-duty pneumatic actuators, crafted from carbon steel for industrial applications such as chemical plants, gas pipelines, refineries, and offshore installations.

Technical Specifications:

Nominal Torque: Ranges from 2000 Nm to 30,000 Nm.
Flange Standards: Compliant with DIN/ISO 5211 and DIN 3337.
Rotation Angle: 90° with stroke adjustment from -5° to +95°.
Air Supply Pressure: From 3 bar to 8.5 bar.
Versions Available: Double Acting, Spring Return Normally Closed (NC), and Spring Return Normally Open (NO).

Working Conditions:

Temperature Range: Standard version from -20°C to +80°C (NBR seals); High-temperature version up to +150°C (FKM/Viton seals).
Supply Media: Filtered compressed air, inert gases, and technical gas. For temperatures below 0°C, dry air is recommended.

Design Regulations: The actuators adhere to EN 15714-3, ISO 5211, and ISO 12490 standards.

Features and Benefits:

Self-lubricated strips reduce friction and prevent seal bonding.
Chromed steel components enhance corrosion resistance and reduce wear.
Scotch yoke system with rolling friction minimizes wear and enhances torque.
ATEX and SIL 3 certifications ensure safety in explosive environments.

Paint Specification: The standard paint is suitable for outdoor installation and harsh environments, involving sandblasting and multiple coats for a total dry film thickness of 225 µm.

Central Body Configurations:

Canted Design: High Break to Open Torque with a significant drop during the final opening step.
Symmetrical Design: Balanced torque curve with similar BTO, ETO, BTC, and ETC values.

Torque Tables: Detailed torque output tables are provided for various models under different air supply pressures, highlighting the performance of both canted and symmetrical designs.

Torque Specifications: The document details torque specifications for SRHG actuators, including maximum torque, break torque output (BTO), running torque output (RTO), end torque output (ETO), break torque capacity (BTC), running torque capacity (RTC), and end torque capacity (ETC) for different configurations and pressure settings.

Components: Lists components of the actuator, including materials such as carbon steel, bronze, and PTFE for parts like the central body, yoke, thrust bar, sliding block, piston rod, and various seals and bushings.

Emergency Operation Accessories: Accessories for emergency operations include manual hydraulic override systems with compact pumps, hydraulic cylinders, oil tanks, check valves, and relief valves, as well as manual handwheel overrides for both double-acting and spring return actuators.

Design and Construction: The actuator design considers mounting pad connections conforming to international standards for easy assembly onto valves and ancillaries. Omal provides customized mounting kits, spool pieces, and stem extensions. The modular construction design ensures versatility and allows components to be assembled according to application requirements.

Catalog excerpts

OMAL S.p.a. Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) ITALY Phone +39 0308900145 - Fax +39 0308900423 Booked in the Enterprise Register of: Brescia number 1661640175 Share capital completely deposited: € 500.000,00 PNEUMAT IC ACT UAT ORS Heavy Duty pneumatic actuators in carbon steel Heavy Duty spring return featu res featu res and benefits paint specification central bod y – available config u rations torq u e tables - nc torq u e tables - no components accessori per manovre d i emerg enza spool piece – stem extension mod u lar constu ction d esig n Features Technical Data: Nominal Torque : from 2000 Nm up to 30.000 Nm . Flange according to DIN / ISO 5211 , DIN 3337. Angle of rotation: 90° with stroke adjustment -5° +95°. Air supply pressure: from 3bar up to 8,5bar (for the Torque, see Tabs) For Double Acting version, the torque is directly proportional to the air supply pressure of the actuator For the Spring Return version the “return torque” (no air supply pressure in the actuator) depends only by the Spring and it’s not related to the air supply pressure Available versions: Double Acting, Spring Return Normally Closed (NC) , Spring Return Normally Open (NO). Cetral body versions: Scotch Yoke “Symmetrical” or Scotch Yoke “Canted Working Conditions: Temperature Range: Standard version: from -20° C a up to +80° C (Seals material: NBR) . High Temperature version: from -20° C up to +150° C (Seals material: FKM/Viton). Supply Media: Filtered compressed air, not necessarily lubricated, inert gases, technical gas For temperature lower than 0°C please use dry air In case of lubricate air, please use non detergent oil compatible with the seals. Design regulations Design according to EN 15714-3 , ISO 5211 , ISO 12490 . Be environmentally friendly...please don't print this document unless you really need to.

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FEATURES AND BENEFITS Less friction between piston and cylinder Slots, bushes and pins made i chromed steel with 2 hardness about 200 HB System motion conversion from linear to rotary separated from the piloting fluid of the actuator. It prevents the bonding of the seal to the cylinder even after long periods of inactivity Reduce the “stick-slip” effect 1 Energized and self-lubricated strips Higher corrosion’s resistance Less friction between stem, guide bar and sliding bushings with consequently less wear on the relevant parts Ability to power the actuator with gases It prevents explosive atmospheres...

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Guarantee of the high level of functional safety. Compliance with European Safety Standards for Pressure Equipment Be environmentally friendly...please don't print this document unless you really need to.

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Paint Specification Omal Standard Paint Specification The Painting of the Heavy Duty Actuqtors (Standard OMAL), mentioned in the Tab, allows th outdoor installation of the actuators; chemical plants, gas pipelines, refineries and Off-Shore applications. On request are available painting cycles according to customer’s specifications SURFACE PREPARATION Primer coat Inorganic zinc primer Iintermediate coat Final coat TOTAL DRY FILM THICKNESS Be environmentally friendly...please don't print this document unless you really need to.

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Central body – available configurations CANTED DESIGN Very high Break to Open Torque, with a huge drop during the final step of the opening operation (ETO). Break to Close Torque much lower than the Break to Open Torque. SYMMETRICAL DESIGN The curve of the Torque is more balanced; the BTO (break to open) – ETO (end to open) –BTC (break to close) – ETC (end to close) values are similar Be environmentally friendly...please don't print this document unless you really need to.

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CANTED SIMMETRICAL CANTED - Normally closed iA Be environmentally friendly...please don't print this document unless you really need to. 6/65

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SIMMETRICAL - Normally closed Torque Output (Nm) Model Number Be environmentally friendly...please don't print this document unless you really need to.

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Model Number SIMMETRICAL - Normally closed Torque Output (Nm) Be environmentally friendly...please don't print this document unless you really need to.

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CANTED SIMMETRICAL CANTED - Normally closed iA Be environmentally friendly...please don't print this document unless you really need to. 15 / 65

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CANTED SIMMETRICAL CANTED - Normally closed IA Be environmentally friendly...please don't print this document unless you really need to. 18 / 65

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CANTED SIMMETRICAL CANTED - Normally closed i^i Be environmentally friendly...please don't print this document unless you really need to. 21 / 65

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Model Number SIMMETRICAL - Normally closed Torque Output (Nm) Be environmentally friendly...please don't print this document unless you really need to.

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