Samson EB 31a-23, Mounting And Operating Instructions

Page: 18 / 64

5-2
EB 31a-23_EN
Edition: November 2021
Speci fi cations subject to change
Mounting and assembly
Before mounting the actuator over the valve, make sure the fol-
lowing conditions are met:
− The actuator is not damaged.
− The type designation, material and temperature range of the
actuator match the ambient conditions (temperatures etc.).Re-
fer to section “2 Markings on the device” for name plate de-
tails.
− Check compatibility of the valve stem to the actuator bore.
The length, size and con
fi gurations must match.
− Check compatibility of actuator, valve and bracket bolting
pattern.
− Before fi tting the actuator over the valve, make sure that the
actuator and the valve are correctly oriented, with reference
to the rotation direction and fail action required.
− Make sure that the tubing, fi ttings and seals connected to the
actuator are cleaned to prevent foreign matter/objects enter-
ing into the actuator’s chambers.
− When fi tting accessories over the actuators, assemble them in
such a way that the emergency controls are easily accessible
for emergency manual operation.
− Check that the exhaust ports are not obstructed.
− Remove the plugs from the actuator air connections during
installation and operation, protect and close the air connec-
tions which may not being used immediately.
− Make sure that the operating pressure media composition
used for the actuator operation meets the operating condi-
tions given in this manual and corresponds to what the actu-
ator was manufactured for. Refer to section “3 Design and
principle of operation”.
− It is the user responsibility to ensure that actuator and control
components must be protected from electrical spikes, surge
and lightning strikes as well as all magnetic
fi elds.
− Prevent any dangerous and/or corrosive substances in the
working environment enter into the internal chambers by us-
ing adequate
fi lters and/or solenoid valves and/or any other
appropriate system.
Fig. | 5-2: Mounting the valve
Refer to Fig. 5-2 and proceed as follows to mount the actuator
over the valve:
Ö
Disconnect any electrical/pneumatic/hydraulic power supply
Ö
Lay out the necessary material and tools to have them ready
during mounting
Ö
The actuator is supplied in the fail position (for single-acting),
so drive the valve in the right position as per the actuator fail
position
Ö
Clean the actuator‘s bore and the bottom fl ange
Ö
Clean the valve and the actuator interface to remove com-
pletely any lubricant
Ö
Place the bracket, if any, over the valve fl ange, tighten all
bolts and nuts and apply the correct tightening torque
Ö
Assemble the coupling at fi rst into the valve stem before the
assembly of the actuator
Ö
Lift the actuator