OMC RE20 - Connection - Air; Safety; Supply Pressure Condition; Piping Condition

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Installation
,
O
p
eration and Maintenance Manual ManRE20en Rev.06/2022
OMC S.p.A: Via G. Galilei, 18 - 20060 - Cassina de Pecchi (MI) - ITALY - www.omcvalves.com - Tel.: (+39) 02.95.28.468
4. Connection - Air
4.1 Safety
 Supply pressure should be clean and dry air – avoiding moisture, oil and dust.
 Always recommended to use air filter regulator (i.e. FR10 series).
 OMC has not tested positioner’s operation with any other gases other than clean air.
Please contact OMC for any questions.
4.2 Supply Pressure Condition
 Dry air with dew point of at least 10℃ lower than ambient temperature.
 Avoid from dusty air. Use 5 micron or smaller filter.
 Avoid oil.
 Comply with ISO 8573-1 or ISA 7.0.01.
 Supply pressure range is 0.14 ~0.7 MPa (1.4 ~ 7 bar)
 Set air filter regulator’s pressure level 10% higher than actuator’s spring range pressure.
4.3 Piping Condition
 Ensure inside of pipe is clean of obstructions.
 Do not use pipeline that is squeezed or shows any type of damamges.
 Pipeline should have more than 6mm of inner diameter (10mm outer diameter) to maintain flow
rate.
 The length of pipeline system should not be extremely long. Longer pipeline system may affect
flow rate due to the friction inside of the pipeline.
4.4 Connection – Piping with actuator
4.4.1 Single acting actuator
Singe acting type positioner is set to use only OUT1 port. OUT1 port of positioner should be
connected with supply port of actuator when using spring return actuator of single acting type.
Fig. 4-1: Single acting linear actuator Fig. 4-2: Single acting rotary actuator
4.4.2 Double acting actuator