Brochure

Emerson Climate Technologies
108
EX Valves & Controls
High Pressure Expansion Valves Series CX4, CX5, CX6, CX7
Features and Benefits
• Multifunction
• Fully hermetic design in two versions: ODF connections and
• Mainly for CO
2
systems
• Stepper motor driven
• Short opening and closing time
• Very fast full-stroke time
• High resolution and excellent repeatability
• Positive shut-off function to eliminate the use of an
additional solenoid valve
• Linear flow capacity
• Extremely wide capacity range (10 … 100%)
• Direct coupling of motor and valve for high reliability (no
gearmechanism)
• Ceramic slide and port for accurate flow and minimal wear
• Balanced force design
• Corrosion resistant stainless steel body and connections
• Europe patent No. 0743476, USA patent No. 5735501,
Japan patent No. 28225789
CX4/5/6/7 with ODF connections
Cable and Connector Assemblies
Selection Table
Type Part No.
Kv
(m
3
/hr)
Capacity Range Inlet Connection Outlet Connection
Electric
Connector
CX4-CO2 801 990 0.2
10 ... 100%
3
⁄ 8 ” ODF
5
⁄ 8 ” (16 mm) ODF
M12 plug
CX5-CO2 801 991 0.6
5
⁄ 8 ” (16 mm) ODF
7
⁄8 ” (22 mm)
CX6-CO2 801 992 1.5
7
⁄ 8 ” (22 mm) ODF 1-
1
⁄ 8 ” ODF
CX7-CO2 801 996 5.5 1-
1
⁄ 8 ” ODF 1-
1
⁄ 8 ” ODF
CX4-CO2F 802 000 0.2
5
⁄8” Thread
5
⁄ 8 ” Thread
CX5-CO2F 802 001 0.6
7
⁄8” Thread
7
⁄8” Thread
CX6-CO2F 802 002 1.5
7
⁄8” Thread
7
⁄8” Thread
CX7-CO2F 802 003 5.5
7
⁄8” Thread
7
⁄8” Thread
Type Part No. Temperature Range Length
Connector type
to valve
Connector type to driver
board or controller
Illustration
EXV-M15 804 663
-50 … +80°C
1.5 m
M12 Loose wiresEXV-M30 804 664 3.0 m
EXV-M60 804 665 6.0 m
ALCO Controls CX4 / CX5 / CX6 / CX7 are stepper motor driven
valves for precise control of refrigerant mass flow in air condi-
tioning and refrigeration systems with CO
2
. The Control Valves
can be used as high pressure gas valve for gas cooler control,
expansion device, hot gas and cold gas bypass, liquid injection
duty, evaporator pressure regulator, crankcase pressure regula-
tor, head pressure regulator, or liquid level control.
167
CX4/5/6/7 with thread connections
Note 1: The valves are delivered without cable/connector assembly (order separately).
Note 2: The valves with thread connections are delivered without counterpart steel tube fitting
Accessory Kit
Kit set Part No. Kit content
Useable for
valve type
External tube
(outside diameter)
Required quantity of kits for each valve
(inlet and outlet)
Illustration
CXK-058 802 010
Two ferrule
grips
and one
nut
CX4-CO2F
5
⁄8” 2
CXK-078 802 011
CX5-CO2F
7
⁄8” 2
CX6-CO2F
7
⁄8” 2
CX7-CO2F
7
⁄8” 2
ALCO Controls CX4 / CX5 / CX6 / CX7 are stepper motor driven
High Pressure Expansion Valves Series CX4, CX5, CX6, CX7
CX Series