9
Model EA91A＆EA90A
※If the device is in conditions of ① or ②, contact our sales branch or sales agent.
※Refer to Item 9.2 "Dimension of Mounting Hardware" for
dimension of each part.
※The ambient temperature in the non-explosion-
protected environment is ‒40 to 100℃
−20〜60℃
−20〜60℃
80〜110 kPa, Absolute Press.
Environmental
Conditions
Model
Ambient Temp.
Atmospheric
Pressure
(5) Orifice Plate Check
Remove pilot cover, and check orifice plate appropriate
for actuator capacity is installed and set.
Connector Arm
Stem Clamp
For Model 2900
For Model 3300
For Model 3800
For Model 2800
Bracket
Feedback Lever
4.2 Installation Conditions
4.2.1 Locations for Installation
The models EA91A and EA90A electro-pneumatic
positioner can be installed and used at the hazardous
area in accordance with gases to be used.
4.3 Pre-Installation Check
(1) Nameplate Check (related to specifications and
explosion-protected type)
Check the content of the nameplate attached to the main
body of the positioner whether the ordered specification
is conformed with.
(2) Appearance Check
Check the presence of damage on the device due to
transport.
(3) Accessory Identification
Lever Type : Bracket, Stem Clamp (Connector Arm
included), Feedback Lever, and Connectr
Pin
Buit-in Cam Type : Bracket, Connecting Shaft, Set
Screw, Spacer Bolt, and Set Spring
Also, the relative bolts, nuts, vises, and washers, etc. are
attached.
(4) Pressure Gauge Check
①If the equipment may cause to be exposed to the radiation from plant facilities and the
ambient temperature may be abnormally high, take appropriate measures to insulate the
heat.
② If installing the equipment under the special conditions (vibration, corrosive atmosphere,
always be exposed to drain), take appropriate measures to protect from such conditons.
4.2.2 Environmental Conditions
The applicable environmental conditions are shown in
the right table.
CAUTION
IMPORTANT
IMPORTANT
Model EA91A
Flameproof Type
Model EA90A
Intrinsic Safety Type
Be sure not to provide overpressure because
the pressure gauge appropriate for supply
air pressure is installed.
Although orifice plate that conforms to the
order specifications is installed at factory
shipment, check it again. (Refer to Item 4.6.1)
