Pre-Installation Inspection; Logix 3400Md Positioner Overview - Flowserve Logix 3400MD User Instructions

The vent assembly is located in the upper left side of the positioner.
The gaps around the assembly as noted by the arrows should be sealed
for long term storage.
Vent assembly
A small desiccant package as shown can be included under the sealing
tape to insure proper protection.
Desiccant packet
Logix 3400MD Digital Positioner FCD LGENIM3404-00 – 9/09
All of the edges around the vend assembly should be sealed similar to
the picture below.
Joints to be sealed
Removeable
sealing tape
The sealing tape and desiccant should be removed when instrument air
is permanently applied to the positioner.
3.3
If a valve control package has been stored for more than one
year, inspect one actuator by disassembling it per the appropriate
Installation, Operation, and Maintenance Instructions (IOM) prior to
valve installation. If O-rings are out-of-round, deteriorated, or both,
they must be replaced and the actuator rebuilt. All actuators must then
be disassembled and inspected. If the actuator O-rings are replaced,
complete the following steps:
1. Replace the pressure-balance plug O-rings.
2. Inspect the solenoid and positioner soft goods and replace as
necessary.
4
The Logix 3400MD digital positioner is a two-wire F
compliant digital valve positioner. The positioner is configurable
through the local user interface. The Logix 3400MD utilizes the FF
protocol to allow two-way remote communications with the positioner.
The Logix 3400MD positioner can control both double- and single-
acting actuators with linear or rotary mountings. The positioner is
completely powered by the FF signal. Start up voltage must be from a
FF power supply source.

Pre-installation Inspection

Logix 3400MD
Positioner Overview
flowserve.com
Fieldbus
oundation
5