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. Buy danfoss 068z340300 thermal expansion valve tes2 r404a less orifice for danfoss 881076. Normally, these valves are rated in tons of refrigeration, so you need to remember that 1 ton of. See bulletin 2010 for application and selection information on refrigerant distributors. We will also detail the differences between a thermostatic expansion. There are three pressures, p1, p2 and p3 working inside the thermostatic expansion valve.
A thermal expansion valve or thermostatic expansion valve often abbreviated as tev, txv, or tx valve is a component in refrigeration and air conditioning systems that controls the amount of refrigerant released into the evaporator thereby keeping superheat, that is, the difference between the current refrigerant temperature at the evaporator outlet and its saturation temperature at the. To dimension a thermostatic expansion valve for a refrigerating system correctly, the following design. Two common examples of this type of device are the capillary tube, or cap tube, and the short tube restrictor, or plug orifice. Bulb thermostatic expansion valve head improperly located inside the heat pump. While not always convenient or possible, thermostatic expansion valve are easier to service. The fixed area restrictor expansion device is simply a precisely formed restriction through which liquid refrigerant flows. Thermostatic expansion valve an overview sciencedirect. Transport scroll compressors electronics for hvac applications integrated solutions. The hf series is a balanced ported valve designed for refrigeration, air conditioning and heat pump applications. This the upper portion of the thermostatic expansion valve inside which the gas is filled. Lets say we want to select a thermostatic expansion valve for our system. Find the right valves, controls and system protectors for your air conditioning or. The valves control the injection of liquid refrigerant into evaporators and protect the compressor motor against liquid refrigerant. User responsibility failure or improper selection or improper use of the products described herein or related items can cause death, personal injury and property damage.
Injection is controlled by the refrigerant superheat. Sporlan selection program for hvacr applications is new virtual. Lae valves can be used for interstage cooling in compound systems. Too much moisture inside the thermostatic expansion valve making it induce instability. Refer to bulletin 1011 for a complete discussion on installing and servicing thermostatic expansion valves. Product selection software to give you fact and user friendly access to the. For over 85 years parker sporlan has remained committed to strengthening the hvacr industry through education. In this video i go over sporlan txv selection for refrigeration applications. The thermostatic expansion valve allows you to keep a constant superheat or refrigerant.
Thermostatic expansion valve selection chart for l. Thermostatic expansion valve selection chart forheatcraft products tm. Refrigeration design software coolselector 2 youtube. How does an electronic expansion valve work eev exv. Thermostatic and automatic expansion valves catalog e1, july 2012. Service first r410a thermal expansion valve val08633. Hydronic balancing and heating control in one valve. We are excited to continue our tradition of providing educational hvacr information and training to the industry. Save time and money while upgrading your ac and heat pump systems by offering the latest thermostatic expansion valve with both chatleff and aeroquip adapters in one box. Designed to meet any challenge posed by air conditioning or refrigeration applications, parker offers a line of thermostatic expansion valves geared towards real world situations. Thermostatic expansion valve selection when selecting a thermostatic expansion valve tev for use with a sporlan type distributor, an externally equalized valve must be used to compensate for the distributor. Differences between a thermostatic expansion valve and an electronic expansion valve in this article we will explain in a simplified way what is the role of the expansion valve iin the refrigeration production cycle. Pwm expansion valves safety valves 30665 safety valves for co2 3ways motorized ball valves electronic oil level regulator smart connector filters sf co2 application brochure solenoid valves catalogue products ul replaceable solid core filter driers. The pressure p3 is the spring pressure that tends to close.
Parker hhc series thermostatic expansion valves are designed for use on air conditioning and heat pump systems. This includes a comprehensive range of types and fitting configurations, assuring tights seals and quality processes throughout production. Refrigeration design software the engineering mindset. Quick selection automatic controls, compressors and condensing units catalogue. They both ensure refrigerant flow to the evaporator by maintaining proper superheat. Balanced port thermostatic expansion valve selection chart for chandler. A thermostatic expansion valve is built up around a thermostatic element 1 separated from the valve body by a diaphragm. Electronic expansion valves reduce the significant energy. Page 2 bulletin 50010hccr the selections are based on load and operating conditions provided by heatcraft inc. The thermostatic expansion valve is substantially an undamped proportional control and hunts continuously, although the amplitude of this swing can be limited by correct selection and installation, and if the valve always works within its design range of mass flow. The thermostatic expansion valve tev controls the flow of liquid refrigerant entering the direct expansion dx evaporator by maintaining a constant superheat of the refrigerant vapor at the outlet of the evaporator. In this short video, see how coolselector2 makes component calculation and selection easy.
P1 is the pressure at the top of the thermostatic expansion valve acting inside the power element above the diaphragm. A capillary tube connects the element to a bulb 2 and a valve body with valve seat 3 and a spring 4. Expansion valve for ac and refrigeration browse txv. The 50vqp large capacity, indoor watercooled heat pump units are designed for vertical installation with a variety of airflow configurations. Home sporlan thermostatic expansion valve sve3cp100. This small flare brass valve series is ideally suited where space is at a premium. The thermostatic expansion valve tev controls the flow of liquid refrigerant entering the direct expansion dx evaporator. Expansion valve cross reference thermostatic expansion valve cross reference fixed orifice replacement valves are similar but not necessarily identical to original valve. User friendly software tools for real time alerts, information and service with. Some of the prominent parts of the thermostatic expansion valve or tev are. Sporlan refrigerant distributors race catalogue 2010 uk, may 2010. In this video were going to cover the basic working principles for how an electronic expansion valve works in a refrigeration system.
Run unbiased calculations based on a set of operating conditions such as cooling capacity, refrigerant, evaporation, and condensation temperature and then select the best components for your design. One of the basic components selected when installing a walkin coolerfreezer or any fieldassembled refrigeration system is the metering device, typically the thermostatic expansion valve txv. Differences between a thermostatic expansion vs valve and. You have been signed out due to inactivity the last 120 minutes. System manufacturers, however, have successfully applied distributors in other orientations. It is illegal to install products that are not lead free in accordance with us federal or other applicable law in potable water systems anticipated for human consumption. Thermostatic expansion valve troubleshooting guide. Quick select guide thermostatic expansion valves, types t2te2 7 selection instructions 1. Thermostatic expansion valves t2, te2 technical data and ordering. Therefore the valves are especially suitable for liquid injection in dry evaporators where the superheat at the evaporator outlet is. In refrigeration and air conditioning systems, the thermostatic expansion valve tev can be a difficult device to understand, install, adjust, and troubleshoot.
Newest mobile app offers you suggestions for the selection of refrigeration and airconditioning components based on the users requirements or on standard. The lae series is a desuperheating liquid injection valve used in conjunction with hot gas bypass to prevent excessive suction line superheat. The mathematical models described in the paper form part of computer software that simulates the thermal operation of whole refrigeration systems. Learn online with our specialist training, wholesaler training, zoomlock training and chillskills webinars. Nxt thermostatic expansion valves bestinclass performance, reliability and valve life through precision superheat control optimized for r410a systems and an. From the 1947 launch of the catchall, the worlds first molded core filterdrier, to todays intricate electronic valve and controller packages, for over 80 years sporlan has set the industry standard for the development and manufacture of leading edge hvacr components. Balanced port thermostatic expansion valve selection chart for heat transfer products group unit coolers.
With danfoss thermostatic expansion valves, you can expect precise operation and long service life of your refrigeration system. Application nominal capacity r22 valve family service replacement style connections configuration port adjustable superheat internal hermetic check replaceable power element field assembled sae odf angle straight conventional balanced air. Selection of refrigeration and airconditioning components based on the users requirements or on standard operating conditions in common refrigeration and ac systems. Distribution problems with the refrigerant, overfeeding, starving, or sometimes making it impossible to reach superheat.
Thermostatic expansion valves regulate the injection of liguid refrigerant into evaporators. After making your selections, you can create a pdf report rpt field containing all of your inputs, valve selection, and calculated values or export the values in an excel file. All selections are based on condensing pressures of 175 psig r22, 200 psig r404a and r507, and 10 degree liquid subcooling. The pressure p2 is the pressure acting on the lower side of the diaphragm due to the refrigerant pressure inside the evaporator. Adjust superheat select the valve body based on refrigerant and need for internal or external equalization using the table on the next page under valve body selection. The aseries is used for heat pump, air conditioning, food services and commercial applications. The txv needs to be selected to match the btu capacity of the systems evaporator and compressor. Sporlan selection program for hvacr applications is new. Dsg series liquid line filter drier with sight glass. In the below example we will compare a thermostatic expansion valve with an electric expansion valve.
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