EMERSON Electrical Control Valves Series EX4-I21,EX5-U21,EX6-I21 Features

• 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

EMERSON Electrical Control Valves Series EX4-I21,EX5-U21,EX6-I21 photos