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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
IT
EN
DE
FR
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INSTRUCTION MANUAL
RACKON: RACK & PINION PART TURN PNEUMATIC ACTUATOR
RK10 - RK480
End cap screw
Size
Thread
key
Torque (Nm)
Size
Thread
key
Torque (Nm)
RK 10
M5
Ch.4
6-8
RK 120
M8
ch.6
22-25
RK 20
RK 160
RK 40
M6
Ch.4
10-11
RK 240
RK 60
RK 300
M10
ch.8
38-43
RK 80
Namur plate screw
Size
Thread
key
Torque (Nm)
For all models (if supplied)
M5
Ch.4
6-8
11. ATEX SPECIFICATION
In conformance with the European Directive ATEX 2014/34 UE for the suitability of the equipment intended for the use in Potentially
Explosive Atmosphere, OMAL declare the conformity of the part-turn actuator of the above mentioned Atex directive in the limits of its
Classification and Zone Classification.
A) Equipment classification:
• Equipment Group II;
• Category 2;
• Gas Zone 1-2, Dust Zone 21-22;
• Type of protection: Ex h (with constructional safety ‘c’);
• Gas group IIC (IIB with non conductive coating thickness > 0,2mm);
• Dust group IIIC;
• Temperature Class T6…T3 (as per following table);
• EPL: Gb (Gas), Db (Dust);
T. max fluid and T. max ambient
Temperature Class
Max surface temperature
-50°C ≤T≤ 60°C (-58°F≤T≤140°F)
T6
T85°C (185°F)
60°C <T≤ 75°C (140°F≤T≤167°F)
T5
T100°C (212°F)
75°C <T≤ 110°C (167°F≤T≤230°F)
T4
T135°C (275°F)
110°C <T≤ 150°C (*) (230°F≤T≤302°F)
T3
T175°C (347°F)
(*) FKM SEALS
B) Equipment marking:
II 2G Ex h IIB/IIC T6..T3 Gb X
II 2D Ex h IIIC T85°C..T175°C Db X
Tech. file N. RK.19
Whenever the actuator may be installed in the Potentially Explosive Atmosphere the operator before starting the installation must
observe the suitability of the equipment classification and special installation instruction included that follow the actuator. In case of
instruction missing or any doubts please call the OMAL technical department.
