Press Release Summary:
Formed from steel, ICV weld-in control valves are offered in servo and digital motorized versions. Both use same valve body, which has no internal bearing surfaces. Seat and all operating parts are contained in replaceable function module. Single- and 3-pilot bonnets are offered for servo-operated versions. With working pressure range to 725 psig, products perform as pressure regulating valves, solenoid valves, and stepper motor controlled expansion valves.
Original Press Release:
Patented Control Valve Family for Industrial Refrigeration Offers Many Unique Features
Baltimore, October 20, 2004
Danfoss is introducing a unique patented family of weld-in control valves for industrial refrigeration applications. The ICV family offers both servo and digital motorized versions. Both versions for a given capacity use the same valve body, with no internal bearing surfaces. The seat and all operating parts are contained in a replaceable function module. Single-pilot and three-pilot bonnets are offered for servo-operated versions. A servo valve can be upgraded to motorized function by changing the bonnet and function module.
ICV valves perform as pressure regulating valves, solenoid valves, and as stepper motor controlled expansion valves. ICS (servo version) applications include suction pressure regulation in multi-temperature evaporator systems; and hot gas relief and solenoid function. Applications for the motorized ICM version include liquid injection into pump separators; dry expansion liquid injection and hot gas injection liquid injection on high pressure PHE systems; and liquid injection into closed economizers.
Because of an extended working pressure range up to 52 bar (725 psig), ICS valves, can be used in CO2 systems as hot gas release valves. Promising new applications for the motorized ICM include use as an electronic expansion valve in DX ammonia systems; use as a media temperature suction controller; and as an electronic expansion valve for liquid injection on screw compressors. Danfoss supplies a variety of compact controllers suitable for use with the ICM valve.
In the patented design of the ICV family, the weld-in valve body has no internal bearing surfaces, and will not require replacement during its service life. There is no bottom port. The seat and the entire valve mechanism are contained in a replaceable function module that is accessible by removing the valve bonnet To order a servo valve, the user selects the body size, a function module, and a bonnet Selection of bonnet and function module depends on whether the application requires a single pilot or more (up to three).
ICM motorized valves have a body, a bonnet-function module unit, and a motor. The motor is magnetically coupled to the function module, making it possible to remove or change the motor without shutting down the system. 4-20 mA, 0-20 mA, 0-10V, and 2-10V control signals can be used with the stepper driver that is supplied on the motor. The ICM valve motor also has a three digit display, so that valve function can be continuously observed. Programming by three buttons on the stepper driver is password-protected. Alarms can be programmed, and their history is logged.
All ICV valves are formed from low temperature steel, and are much more compact and less than half the weight off traditional ductile iron valves.
ICV connection dimensions are in accordance with DIN, ANSI, SOC, SA, and FPT standards.
Danfoss is a leading supplier of air-conditioning and refrigeration controls with factories and sales offices worldwide.