Adjusting a TXV/TEV is an advanced skill for a technician who has a good grasp on their readings and the forces at play. Tread carefully. —Bryan. P.S. – Here is a great resource from Parker/Sporlan
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Once you have ensured all the above things, you can adjust the thermostatic expansion valve (TXV). Step 1. With the help of a wrench and the backing wrench with the adjustable screw, the technicians are challenged to remove the hex cap located on the base of the TXV valve. Step 2.
The TXV cannot be adjusted open or closed, it is a modulating valve. Turning the adjustment stem clockwise will only increase spring pressure causing a higher superheat. Turning the adjustment stem counterclockwise will decrease spring pressure reducing superheat.
The thermostatic expansion valve allows you to keep a constant superheat (or refrigerant level) at varying load situations in the refrigeration system to save energy. Features and benefits Adjustable and non-adjustable superheat setting designs
We review how adjust an TXV and what to consider before doing it.Check out an updated version of the video: https://www.youtube.com/watch?v=IPMIv-ro3kgRead a...
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• ADJUSTABLE SUPERHEAT DESIGN All standard valves are externally adjustable. Outstanding Features & Benefits of Sporlan Thermostatic Expansion Valves FOR USE ON REFRIGERATION and/or AIR CONDITIONING SYSTEMS ONLY Bulletin 10-10, April 2011 supersedes Bulletin 10-10, October 2009 and all prior publications.
TXV accessories: Product description: Thermostatic Expans. Valve: Product family name: TGE: Product group: Expansion valves: Product name: Thermostatic expansion valve: Quantity per packing format: 12 pc: Rated cap. cond. Range N [IMP] tcond=100 °F tevap=40 °F tliq=98 °F: Rated cap. cond. Range N [SI] tcond=38 °C tevap=4.4 °C tliq=37 °C ...
Locate the adjustment needle on the thermostatic expansion valve. Turn the adjustment needle one quarter turn counterclockwise to decrease the temperature. Each quarter turn is equal to one degree.
At the expansion valve outlet, flow is divided into two or more paths (circuits) at the inlet of the evaporator by the distributor; these paths then recombine as they exit the evaporator into the suction manifold. (See Figure 2.) Ideally, each circuit is equally loaded and absorbs an equivalent amount of heat.