Service conditions
Mounting position Any position
Enclosure protection according
to EN 60 529
Standard: IP 67
Options: IP 68 (also refer to page 12)
Corrosion protection Standard: KN Suitable for installation in industrial units,
in water or power plants with a low pollutant concentration
Options: KS Suitable for installation in occasionally or permanently aggressive
atmosphere with a moderate pollutant concentration
(e.g. wastewater treatment plants, chemical industry)
KX Suitable for installation in extremely aggressive atmosphere with
high humidity and high pollutant concentration
Finish coating Standard: Two-component iron-mica combination
Colour Standard: AUMA silver-grey (similar to RAL 7037)
Option: Other colours on request
Ambient temperature Standard: –25 °C to + 80 °C
Options: –40 °C to + 60 °C (low temperature), version L
–60 °C to + 60 °C (extreme low temperature), version EL
– 0 °C to +120 °C (high temperature), version H
Lifetime Open-close duty: Operation (OPEN - CLOSE - OPEN) with 30 turns per stroke
GK 10.2: 20,000 operations
GK 14.2 – 16.2: 15,000 operations
GK 25.2 – 30.2: 10,000 operations
GK 35.2 – 40.2: 5,000 operations
Modulating duty
4)
:
GK 10.2: 5.0 million modulating steps
GK 14.2 – 16.2: 3.5 million modulating steps
GK 25.2 – 30.2: 2.5 million modulating steps
Accessories
Limit switching Limit switching WSH for manually operated valves. For the signalisation of intermediate and
end positions (refer to separate data sheet).
Reversing gearboxes Reversing gearbox GW for reversing the rotation direction for manual and motor operation
Special features for use in potentially explosive atmospheres
Explosion protection II2G c IIC T4 in compliance with ATEX 94/9/EC
Type of duty
5)
During open-close duty:
Short-time duty S2 - 15 min. at 50 % of maximum nominal output torque up to GK 14.6
and at 35 % of maximum nominal output torque from GK 16.2
During modulating duty:
Intermittent duty S4 - 25 % at maximum modulating torque
Ambient temperature Standard: –20 °C to +40 °C
Options: –40 °C to +40 °C (low temperature)
–20 °C to +60 °C
–40 °C to +60 °C (low temperature)
–60 °C to +60 °C (extreme low temperature)
Combinations with actuators SAExC at ambient temperatures > 40 °C with special sizing.
Further information
Reference documents Product description Bevel gearboxes GK 10.2 – GK 40.2
Dimension sheet GK 10.2 – GK 40.2
Technical data GK 10.2 – GK 40.2
Technical data SA/SAR
Technical data GW
Technical data WSH
4) The lifetime for modulating duty depends on the load and the number of starts. A high starting frequency will rarely improve the modulating accuracy. To reach
the longest possible maintenance and fault-free operation time, the number of starts per hour chosen should be as low as permissible for the process
5) The type of duty must not be exceeded.
5
Operation instructions Bevel gearboxes GK 10.2 – GK 40.2
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