Emerson EX7-I21,EX8-M21,PCN800629 Electrical Control Valves

Emerson EX7-I21,EX8-M21,PCN800629 Electrical Control Valves

Type  Part No.  Flow Pattern  Capacity range   Inlet connection  Outlet connection  Electrical connection
EX4-I21  800 615 
3/8“ ODF  5/8“ ODF
EX4-M21  800 616    10mm ODF  16mm ODF
EX5-U21  800 618    5/8“ (16mm) ODF  7/8“ (22mm) ODF
EX6-I21  800 620    7/8“ ODF  1-1/8“ ODF
EX6-M21  800 621  Uni-flow   22mm ODF  28 mm ODF
EX7-I21  800 624    1-1/8“ ODF  1-3/8“ ODF
EX7-M21  800 625   10 ... 100%  28mm ODF  35mm ODF
M12 Plug
EX8-M21  800 629 
42mm ODF  42mm ODF
EX8-U21  800 630    1-3/8“ (35mm) ODF  1-3/8“ (35mm) ODF
EX8-I21  800 631    1-5/8” ODF  1-5/8” ODF
EX4-U31  800 617    5/8“ (16mm) ODF  5/8“ (16mm) ODF
EX5-U31  800 619  Bi-flow   5/8“ (16mm) ODF  7/8“ (22mm) ODF
EX6-I31  800 622  (Heat Pump)   1-1/8“ ODF  1-1/8“ ODF
EX6-M31  800 623    28mm ODF  28mm ODF
EX7-U31  800 626    1-3/8“ (35mm) ODF  1-3/8“ (35mm) ODF

• Multifunction as expansion valve, hot gas bypass,

suction gas throttling, head pressure, liquid level
actuator etc
• Fully hermetic design (no thread joints between
valve body and motor compartment)
• Applicable to all common refrigerants (HCFC,
HFC) and for subcritical CO 2 applications
• Stepper motor driven
• Short opening and closing time
• Very fast full stroke time
• High resolution and excellent repeatability
• Positive shut-off function to eliminate use of 
additional solenoid valve
• Bi-flow versions for heat pump applications
• High linear flow capacity
• Extremely wide capacity range (10 … 100%)
• Continuous modulation of mass flow, no stress
(liquid hammering) in the refrigeration circuit
• Direct coupling of motor and valve for high 
reliability (no gear mechanism)
• Ceramic slide and port for highly accurate flow
and minimal wear
• Europe patent No. 0743476, USA patent
No. 5735501, Japan patent No. 28225789
• Balanced force design
• Corrosion resistant stainless steel body and 
stainless steel connections
• PS: 45 bar
• Liquid Inlet Temperature TS:
Uniflow: -50 to +100°C, Biflow: -40 to +80°C