On multiple evaporator systems, select each valve on the basis of individual evaporator capacity. High efficiency products performance fittings leakage rate refrigerants7 valve type 1 key words drive type capacity2 kv mwp3 mopd 4 refrigerant temperature environment material o connection mechanical strainer internal5 direct flow internal5 reverse flow external6 ped group 2 ped group 1 kw tons m3h gpm. The subcool control provides liquid temperature and superheat pressuretemperature control for most common refrigerants. Electronic expansion valves eev balanced ets valve. Basically electronic expansion valve driver allows ideal operation of.
Sporlan electric expansion valves eevs are one part of a system used for refrigerant flow. This step motor expansion valve is the ideal choice due to its compatibility with a large availability of refrigerants, including hc. The electronic expansion valve eev operates with a much more sophisticated design than a conventional txv. This oc curs by the rotation of a magnetneedle valve as sembly which moves when electrical signals are applied to the surrouding coil. Explore the extensive catalog of electronic controls, solenoid valves, pressure sensors, expansion valves and all sanhua products. The thermostatic expansion valve is the most extensively used type of metering device in refrigeration and air conditioning. All selections are based on condensing pressures of 175 psig r22, 200 psig r404a and r507, and 10 degree liquid subcooling. Looking for johnson controls electronic expansion valve 53cx05. Ts series electronic expansion valves are designed for usage in air conditioning and refrigeration systems or in heat pumps. The choice of the type of refrigerant and the type of system are fundamental in reducing emissions and protecting the. The valve has been designed for precise liquid injection into evaporators for air conditioning and refrigeration applications. Sporlan electric expansion valves eevs are one part of a system used for refrigerant flow control in air con. In this video, paul shows you how to calculate and select both thermostatic and electronic expansion valves for commercial refrigeration using. Mop ballast charge thermostatic expansion valve selection the thermostatic expansion valve can be selected when the following are known.
An akv is based on pulse width modulating pwm principle a combined solenoid valve and expansion valve in one device. Sporlan electric expansion valves rsd total control. The quick response expansion valve qrev with the precision superheat controller pshc is a compact, electronic, closed loop, rapid response superheat control. Control of an electronic expansion valve using an adaptive. Youll usually see electronic expansion valves listed with the acronym of either eev or exv. All valves currently offer 2500 steps of stroke, except for the two largest valves, which have 6386 steps. Akv are electrically operated expansion valves designed for refrigerating plant. Electronic expansion valves ex4ex8 stepper motor driven valves. All valves currently offer 2500 steps of stroke, except for the two. Moreover, these also have statistical advantages again of several percent as the electronic system guarantees optimum calibration at all times, unlike mechanical devices that needs to be adjusted manually and periodically. Eevs control the flow of refrigerant entering a direct expansion evaporator. The valve opens slowly as bulb temperature rises and closes quickly as bulb temperature fails. To date, more than 200,000,000 electric expansion valves have demonstrated proven reliability around the globe.
Exn unipolar stepper motor driven electronic expansion valves. Features precise control using stepper motor with 500 step resolution 250 for lfm. Oct 01, 2014 introducing the new akvp electric expansion valve for food retail applications. Introducing the new akvp electric expansion valve for food retail applications. Electronic expansion valves summary of selection guide. Since electric valves are assigned their functions by the software in their controllers, an electric valve can be used anywhere in a systemas an expansion valve, discharge gas bypass valve, evaporator control valve, heat reclaim valve, head pressure control valve, or crankcase pressure control valve. The pshc is an electronic superheat controller that provides precise control to the qrev through varying load conditions. Multifunction capability as expansion valve, hot gas bypass, suction gas throttling, head pressure, liquid line actuator and other applications systems view product. Coolselector2 features unbiased calculations for the selection of. Jul 28, 2004 the electronic expansion valve eev operates with a much more sophisticated design. Identification the thermostatic element is fitted with a laser. The mop is freely selectable with an electronic expansion valve, and.
Electronic expansion valves replace mechanical expansion devices, improving control of refrigerant flow and consequently increasing unit efficiency by up to several percent. R series electronic expansion valves are mainly used in air conditioning systems with variable refrigerant flow to realize automatic adjustment of refrigerant flow rate and make the air conditioning system work under the best working condition for the purpose of fast cooling, precise temperature control and power. Eevs have small stepper motors that open and close their valve port. They are much more sophisticated and allow the refrigeration system to operate much more accurately and efficiently. In this video were going to cover the basic working principles for how an electronic expansion valve works in a refrigeration system. The resolution of an electric expansion valve eev is governed by the stroke and number of steps in that stroke. Danfoss the pioneer in electric expansion valve control technical paper. Johnson controls electronic expansion valve 53cx05.
The superheat control provides true pressuretemperature superheat control via eev utilizing sporlans unique control algorithms, while the subcool control replaces mechanical subcooling that combines liquid temperature control and minimum superheat control. Ce is the one stop shop for hardware, parts and your hvac needs. Sporlan offers nine standard electric expansion valves to cover the full nominal capacity range from 2. For our refrigeration applications, two technologies are used. While it is without a doubt one of the most commonly used products in the sporlan line, it is often one of the least understood.
Designed for refrigeration and air conditioning applications. Electronic expansion valves balanced ets valve danfoss. Electronic expansion valves eev balanced ets valve danfoss. Using an rsv electric expansion valve in place of a traditional mechanical expansion valve ensures the system is at the desired superheat over a much wider range of operating conditions. Thermostatic expansion valve selection chart forheatcraft products tm. Comparative analysis between a capillary tube and an electronic expansion valve in a household refrigerator jackson b.
It has fantastic valves which are perfect choice to feeding of the. The rsv is engineered for use with common hcfc and hfc refrigerants. The mcsexvdriverxx is used for the positioning and control of bipolar expansion valves using an analog input of 010 vdc 0 vdc 0% valve opening, 10 vdc 100% valve opening. Easy online ordering and nextday delivery available with 247 expert product support.
The akv valves are supplied as a component programme, as follows. Failure or improper selection or improper use of the products described herein or related items can cause death, personal injury. Welcome to parker sporlans virtual engineer sizing and selection tool parker sporlans virtual engineer is an innovative design tool for climate control and refrigeration applications. The danfoss series of electric expansion valves called ets, can offer you efficient and. Find the expansion valves that you need for any job. Ets electric expansion valves offer efficient and reliable operation, covering all air. Jun 04, 2018 how does an electronic expansion valve work eev exv. Colibri electric expansion valves type ets 12c, ets 24c, ets 25c, ets 50c, ets 100c dkrcc. Danfoss the pioneer in electric expansion valve control technical paper when danfoss introduced its first microprocessor based adapkool controller back in 1987 it was also the first controller with adaptive self learning superheat control. Parker sporlans virtual engineer is an innovative design tool for climate control and refrigeration applications. Page 2 bulletin 50010hccr the selections are based on load and operating conditions. Only energized during stepping moving valve member position. The pressure drop across the coil and distributor is assumed to be approximately 35 psi for r22 and r404a. Data sheet electric expansion valves, type ets 6 designfunction the ets 6 electric expansion valves open and close to regulate refrigerant flow by means of a screw, whose rotating motion is transformed into linear motion.
Precise flow regulation for efficient and reliable operation. However, the cost of electronic valves, which includes the sensors, regulator, actuator and the valve itself, is still much higher than for the simple and mechanical thermal expansion valve. Differences between a thermostatic expansion valve and an. The akv valves can be used for hcfc and hfc, r744 refrigerants. The ets 6 electronic expansion valves open and close to regulate refrigerant flow by means of a screw structure which has linear motion. Since electric valves are assigned their functions by the software in their controllers, an electric valve can be used anywhere in a systemas an expansion valve, discharge gas bypass valve, evaporator control valve, heat reclaim valve, head pressure. Ts series electronic expansion valves are designed for use in air conditionin. Electronic expansion valve cevs series parker hannifin. How electronic expansion valves work the engineering mindset. Certain design characteristics may indicate or restrict application to certain system conditions, but the fundamental operation of. Carel electronic expansion valves are designed to meet any cooling capacity requirements up to 2000 kw in airconditioning and refrigeration applications, and stand out above all for their excellent flow control, even at lower. The eev step motor expansion valve provides precise flow control for virtually every refrigeration, air conditioning, and heat pump application, from basic to complex, and in a wide range of environments.
Danfoss had been gaining experience since 1980 whilst. The electronic expansion valve eev operates with a much more sophisticated design. Beginner guide to choose the electronic expansion valves drivers. The ex4ex8 are stepper motor driven valves that are optimized for the control of liquid or gaseous mass flow in refrigeration systems multifunction capability as expansion valve, hot gas bypass, suction gas throttling, head pressure, liquid line actuator and other applications systems. The piston or pin moves the same linear distance for each step. Externally equalized valves are used with coils having refrigerant distributors. The valve supports automatic adjustment of refrigerant flow rate and makes the system work under optimized conditions for the purpose of fast. The sporlan subcool control is a simple means of controlling the electronic expansion valve eev on most liquid subcooling systems. In addition the opening degree of the valve is not influenced by changing suction or condensing pressure but just depending on the electrical output from the controller. Eduardo federal university of minas gerais, mechanical engineering department, belo horizonte, minas gerais, brazil. Ets 6 is a compact and lightweight electric expansion valve. They do this in response to signals sent to them by an electronic controller. Electronic expansion valve controller sec61x series.
This occurs by the rotation of a magnetneedle valve assembly which moves when electrical signals are applied to the. The current range is available with different capacities, and can be used with all common refrigerants r410a, r407c, r404a, r4a, r22. Technical brochure electrically operated expansion valves. Fujikoki custom manufactures and sells electric expansion valves. A small motor is used to open and close the valve port. Electronic expansion valves do not have this problem as theyre motordriven and microprocessorcontrolled and can consequently adapt refrigerant flow according to any conditions, including low pressure differential operation. The valve design uses unipolar drives, and different control solutions exist that are compatible with unipolar drives.
Coolselector2 commercial txvexv expansion valves youtube. Electronic expansion valves stators cables accessories. Multifunction capability as expansion valve, hot gas bypass, suction gas throttling, head pressure, liquid line actuator and other applications systems. Properly reduce system pressure to atmospheric pressure using accepted industry. How eev works electronic expansion valve working principle. Electronic expansion valves exn series emerson climate. Electronic expansion valves are an evolution on the thermal expansion valve. Certain design characteristics may indicate or restrict application to certain system conditions, but the fundamental operation of a sporlan electric valve is consistent.
The valve supports automatic adjustment of refrigerant flow rate and makes the system work under optimized conditions for the purpose of fast cooling or heating, precise temperature. The akv valves are normally controlled by a controller from danfoss range of adap kool controllers. Comparative analysis between a capillary tube and an. Tm thermostatic expansion valve selection chart forheatcraft. Welcome to parker sporlans virtual engineer sizing and selection tool. Electric expansion valve sehi series designed for direct expansion refrigeration, air conditioning and chiller systems. Our series of electric expansion valves, ets, offer you efficient and reliable operation, covering any air conditioning system demand. Electronic expansion valves have been increasing in popularity, and the technology has evolved to cope with increasingly sophisticated demands. In this video were going to cover the basic working principles for how an electronic expansion. How does an electronic expansion valve work eev exv. Danfoss the pioneer in electric expansion valve control.
The quick response expansion valve qrev with the precision superheat controller pshc is a compact, electronic, closed loop, rapid response superheat control solution for refrigeration and hvac applications. Sei electric expansion valves selection procedure sporlan electric expansion valves the electric expansion valve eev controls the flow of refrigerant entering the direct gain due to the vertical lift drop of the liquid line. Please get in touch with your local contact to check if the products of your interest are available in your country. High efficiency products performance fittings leakage rate refrigerants7 valve type 1 key words drive type capacity2 kv mwp3 mopd 4 refrigerant temperature environment. Fitters notes thermostatic expansion valves contents page. Page 2 bulletin 50010hccr the selections are based on load and operating conditions provided by heatcraft inc. The pshc uses an internal pressure sensor and an external temperature sensor to control the qrev flow and maintain the preferred superheat at the evaporator outlet. A ev is the circulation area of expansion valve, in m 2. Sporlan sehi valves precisely meter refrigerant and provide superior superheat control. Electronic expansion valve cevs series race catalog cevs series, may 2019. The sporlan kelvin ii series valve controllers provide unmatched control of electric valves for a variety of applications.
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