EXA Valve Series Operating Instructions
EXA40, EXA50, EXA60 Valve Operating Instructions
Inappropriate and/or improper installation, adjustment, alteration, service or maintenance can cause
property damage, injury or death. Read the installation, operating and maintenance instructions thoroughly before installing or servicing this equipment.
Read these instructions carefully. Failure to fol-
low them could result in a re or explosion causing
property damage, personal injury, or loss of life. The
product must be installed and operated according to
all local regulations.
Service and or installation must be performed by a
trained experienced service technician.
Disconnect power before installation to prevent electrical shock or equipment damage.
FOR YOUR SAFETY
If you smell gas:
1. Open windows.
2. Do not touch electrical switches.
3. Extinguish any open ame.
4. Immediately call the gas supplier.
FOR YOUR SAFETY
The use and storage of gasoline or other ammable
vapors and liquids in open containers in the vicinity of
this control or other appliance is hazardous.
Installation shall conform with local codes. or in the
absence of local codes, in accordance with the National Fuel Gas Code ANSI Z223.1/NFPA54 or CSA
B149.1 as is applicable, and operated in accordance
with the manufacturer’s instructions. These instructions do not supersede OEM’s installation or operating instructions. Installation, inspection, and replace-
ment must be performed by a qualied installer or
gas supplier.
Figure 1: EXA Valve
DESCRIPTION
The EXA series are highly accurate and precise modulating control valves. EXA valves provide repeatable
process control with minimal hysteresis throughout the
entire range of modulation.
The valves’ high re setting and low re setting are user
programmable.
INTERFACE
The EXA valve has a built-in digital controller that provides a seamless interface with
a process controller.
This control must be electrically wired in accordance
with local codes, or in absence of local codes, with
the National Electrical Code, ANSI/NFPA 70 or the
Canadian Electrical Code, CSA C22.1 as applicable.
© 2009 Maxitrol Company, All Rights Reserved
1
EXA Valve Series
SPECIFICATIONS
Maximum Inlet Pressure Limits: 5 psi
Power Requirements: 24VAC/DC +/- 10% 50/60hz
NOTE: The 24V power must be isolated from the
control signal.
Maximum Current Draw: 200mA.
Temperature Limits:
-40 to 150ºF Operating
Control Signal:
0-10VDC, 2-10VDC, 0-20mA, 4-20mA, (user selectable)
100KOhm Input impedance
Mounting: Multipoise
Gases:
Suitable for natural, manufactured, mixed gases, lique-
ed petroleum gases and LP gas-air mixtures.
Certications:
EMC (EN 61000:2001)
•
Immunity (61000-6-2:2001)
•
Emissions (61000-6-4:2001)
•
UL Recognized
•
DIMENSIONS
Dimensions are to be used only as an aid in designing
clearance for the valves. Actual production dimensions
may vary somewhat from those shown.
D
E
A
B
C
Figure 2: EXA Valve Dimensions
Enclosure: IP40
Electrical Connection: UL310
Sizes:
EXA40: 3/8”, 1/2” NPT or Rp ISO 7-1
EXA50: 1/2”, 3/4” NPT or Rp ISO 7-1
EXA60: 3/4”, 1” NPT or Rp ISO 7-1
Capacity @ 1” Pressure Drop - 0.64 sp. gr. gas:
EXA40 (3/8”) ............... 217 cfh
EXA40 (1/2”) ............... 242 cfh
EXA50 (1/2”) ............... 434 cfh
EXA50 (3/4”) ............... 524 cfh
EXA60 (3/4”) ............... 733 cfh
EXA60 (1”) .................. 815 cfh
Model
Number
EXA40
EXA50
EXA60
Swing
Radius
4
(102)
4.3
(110)
4.6
(117)6 (153)
(122)1 (26)
(140)
Dimensions
in inches (millimeters)
A B C D E
4.8
5.5
1.3
(34)
1.5
(39)
2.1
(54)
3.4
(87)
4.1
(105)
3.7
(94)
3.7
(94)
4.1
(105)
2.4
(61)
3.3
(84)
3.9
(100)
© 2009 Maxitrol Company, All Rights Reserved
2