CGX type bypass expansion valveDetailed product description：

Overview
CGX type bypass valve is used for energy regulation of refrigeration compressor units without energy unloading mechanism;
CGX type bypass valve can be used as a constant pressure expansion valve to maintain stable evaporation pressure (temperature);
CGX type bypass valve can prevent the suction pressure of the refrigeration compressor unit from not being lower than its minimum limit value;
Welding of threaded connections with horn interfaces and ODF copper pipe interfaces;
Applicable media: various HFC and HCFCs
The safe working pressure is 28 bar

Feature Introduction
The main function of CGX type bypass valve is to automatically adjust the closing or opening of the valve when the outlet pressure changes,
Keep the outlet pressure constant at the set value and not affected by the size of the inlet pressure (within a certain range).

The function of CGX type bypass valve as a constant pressure automatic expansion valve
If the inlet of this bypass valve is connected to the condensing pressure and the outlet of the valve is connected to the inlet of the evaporator, which is usually the installation position of the thermal expansion valve, under such installation adjustment, when the compressor is not turned on, due to the high evaporating pressure, the bypass valve is in a closed state. After turning on, as the compressor runs, the evaporating pressure gradually decreases. When it decreases below the set value, the bypass valve automatically opens, and the refrigerant fluid enters the evaporator through the throttling effect of the valve. After the evaporator absorbs heat, the evaporating pressure increases and the valve tends to close. At this time, due to the operation of the compressor, the evaporating pressure is reduced again, and the valve is in an open state. During the entire operation process, the valve is in dynamic equilibrium, maintaining the evaporating pressure at around the set value. The amplitude of its evaporation pressure fluctuation is related to the capacity of the valve and is not affected by changes in condensation pressure (or ambient temperature), resulting in stable evaporation pressure.

Technical data

Model Model	Adjustable range of pressure regulation	Nominal Liquid Capacity (kW)		set pressure Setting pressure	Connecting size
		R134a	R22
CGX-05	0～7 Bar	one point five	two point eight	4Bar	Welding copper tube ODF Imported Inlet: φ 8 × 1 Export outlet: φ 10 × 1
CGX-08		two point four	four point five
CGX-10		three	five point six
CGX-15		four point two	eight point four
CGX-20		five point seven	eleven point two
CGX-30		eight point five	sixteen point eight

The function of CGX type bypass valve as an energy regulating valve
If we connect the inlet of this bypass valve to the exhaust pressure and the outlet of the valve to the outlet or inlet of the evaporator (equivalent to suction pressure), under such installation and adjustment, when the evaporator load is high, that is, when the energy of the compressor is large, the bypass valve will be in a closed state. After running for a period of time, the load on the evaporator decreases, which means that it does not require a large amount of energy from the compressor. As the expansion valve gradually closes at this time, the evaporation pressure also gradually decreases. When it becomes lower than the set value, this bypass valve automatically opens, short circuiting a part of the compressor's exhaust pressure to the inlet or outlet of the evaporator. In fact, this also achieves the purpose of energy regulation.
CGX type bypass valve as an energy-saving function
In the above energy regulation process, after the unit runs until the evaporator load decreases, the evaporation pressure below 4 bar is increased to 4 bar due to the action of the bypass valve, which reduces the pressure difference between the excessive suction and exhaust, thereby reducing the load on the compressor, achieving energy-saving effect, and protecting the evaporation pressure from being too low.

Installation recommendations
Bypass the hot air back to the inlet of the evaporator to increase the superheat at the outlet of the evaporator, increase the liquid supply, and reduce the suction temperature.
Alternatively, a spray control valve can be installed to throttle and reduce the pressure, allowing a portion of the refrigerant liquid to evaporate and absorb heat in the suction pipe, resulting in a decrease in exhaust temperature.

Ordering Instructions
When leaving the factory, connect according to the form, size, and pressure setting values shown in the diagram.
The nominal cooling capacity in the main technical parameters is provided as a reference for selection.
If there are any other special requirements such as takeover form and size, please raise them when ordering.

Dimensions of external dimensions