Flowserve 93 Series PULSAIR III - Manual

The Pulsair III is a digital positioner designed primarily for
controlling adjustable valves. The positioner can be used with single
or double action 39 series actuators.
The Pulsair III Watertight Positioner (L93W) can be equipped with
modules for feedback, limit switches, sensors, and a pressure
gauge block.
The Pulsair III Hazardous Location Positioner (4L93Z) does not
allow for switch/sensor options. However, the feedback (4–20 mA
output) option is included as standard.
For the L93W, modules can be factory assembled before delivery or
fitted later.
The modules for feedback (4–20 mA output) and limit
switches/sensors can contain the following:
Feedback (4–20 mA output) and/or one of the following functions:
• Two mechanical switches (code M2)
• Two proximity (reed) switches (code R2)
• Two Namur sensors (code P2)
Storage Instructions
PULSAIR III positioners are precision instruments which should be
stored and handled accordingly to avoid problems or damage.
Electro-pneumatic positioners contain electronic components which
can be damaged by exposure to excessive water. Appropriate
precautions should be taken to protect units while in storage.
Warehouse Storage
Stored in original shipping containers, units should be stored in an
environmentally controlled area, i.e., clean, cool (15–26°C, 60–80°F)
and dry, out of direct sunlight or weather exposure.
Field Storage
NOTE: Once the air supply to the positioner is connected and turned
on, internal air bleed will prevent the ingress of moisture and protect
the unit from corrosion. It is recommended that the air supply be
left on at all times.
• If units are installed immediately, turn, and leave on,
the air supply.
• If positioners must be stored outdoors, tighten all
covers which may have loosened in shipment and
make sure all open enclosure points are sealed.
Positioners should be wrapped and sealed, air and watertight with
desiccant inside the plastic, units should be securely covered with an
opaque cover and not exposed to direct sunlight, rain or snow.
Units should have all ports sealed and be protected from direct
exposure to weather. For long term storage (>1 month) or overseas
shipment, units should be protected with plastic and desiccant.
Potential Damage to Mechanism
When units are stored in hot, humid climates, the daily
heating/cooling cycle will cause air to expand/contract and be drawn
in and out of the positioner housing. Dependent on the local
temperature variations, humidity, dew points and time in storage,
condensation could occur and accumulate inside causing erratic
operation or failure due to water and corrosion. The potential for
condensation damage is especially high in southern climates and
aggravated if units are exposed to direct sunlight.
For further assistance, please contact you nearest Worcester
distributor.
Worcester Controls
19860-C
Series 93 PULSAIR III
Digital Electronic Positioner
Installation, Operation and Maintenance Instructions