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OMAL S.p.A.
Headquarters
: Via Ponte Nuovo, 11 - 25050 Rodengo Saiano (BS) Italy •
Production Site:
Via Brognolo, 12 - 25050 Passirano (BS) Italy
Ph.
+39 030 8900145 •
Fax
+39 030 8900423 • [email protected] •
www.omal.com
Reference 8_1522 - UMAAPRK0 - 07/20
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INSTRUCTION MANUAL
RACKON: RACK & PINION PART TURN PNEUMATIC ACTUATOR
RK10 - RK480
FOREWORD
Present User’s Installation and Maintenance Manual has been edited in conformity with:
- 2006/42/EC Directive “Machinery”;
- 2014/34/UE Directive “Equipment and protection systems designated to be used in potentially explosive atmospheres” (ATEX);
Following standards/technical specifications also applied:
- EN 15714-3:2009 Industrial valves: Actuators – Pneumatic part-turn actuators for industrial valves;
- IEC 61508:2010-1/7 Functional safety of electrical/electronic/programmable electronic safety-related systems. Part 1÷7;
- UNI CEN/TS 764-6:2005 Pressure equipment Part 6: Operating instructions structure and contents;
1. GENERAL FEATURES
OMAL manufactures a wide range of part-turn pneumatic actuators for valve remote control.
Actuators are available on Double Acting (DA) and Spring Return (SR) versions.
Main actuator purpose is to open and close valves using an electric-pneumatic connection on remote control, without any manual
operation (lever or hand wheel).
Rackon actuators use a Rack & Pinon kinetics to transform a rectilinear motion generated by pistons into a shaft rotational motion
0°÷90°. Standard actuators (DA and SR) have a clockwise rotation (CW) direction to close the valves (0° closed valve, 90° opened
valve), but counter-clockwise rotation (CCW) versions (0° opened vale, 90° closed valve) are available too.
Double acting (DA) Rack & Pinon actuators have a double constant rectilinear torque curve, while Spring Return (SR) Rack & Pinon
actuators have a decreasing rectilinear torque curve.
The components for the actuator maintenance are supplied in the OMAL spare part kit (see section 9 exploded views).
Actuators maintenance should be done by OMAL or trained personnel only (see section 10).
This instruction manual contains important information regarding operation, installation, maintenance, and storage of OMAL actua-
tors. Please read it carefully before installation and keep it in a safe place for further reference.
Actuators are components without defined and proper functionality.
Below you will find the safety instructions, minimum information for storage / ware cylinder, installation, commissioning, maintenance
as well as instructions for products disposal at the end of their life cycle.
OMAL disclaims any liability for damage caused by improper use, even if partial, respect to the information contained in this manual.
2. WORKING CONDITIONS
2.1 Installation
Standard OMAL actuators are suitable for indoor and outdoor installation. Degrees of protection provided by enclosures according to
IEC 60529 - IP rating 66/67/68.Technical features such as type, size, operating pressure, output torque, operating temperature, flange
connection, product code and production date are readable directly on the product by a printed or a laser-graving label (see section 3).
2.2 Operating medium
Use filtered compressed air not necessarily lubricated according to UNI EN 15714-3:2009 or inert gases compatible with internal
actuator parts and lubricants. Operating medium must have a dew point equal to -20°C (-4°F) or, at least, 10°C (50°F) below the
ambient temperature (ISO 8573-1, Class 3). Maximum particle size must not exceed 40 μm (ISO 8573-1, Class 5).
2.3 Supply operating pressure
Nominal supply pressure 5,5 bar (80 PSI) for Double Acting, 6 bar (87 PSI) for Spring Return RS60. Maximum supply pressure 8 bar
(116 PSI).
