The interface of the refrigerant pipe opening can be M14 or 1/2 thread. If you use other inspection tools, please check whether the screwdriver hole and the refrigerant cylinder hole are compatible. sustainable. Function: Additional cooling kit for air conditioning. The R134 interface is easy to use and install. High pressure hose with 1/2 inch ACME connection. The integrated safety valve prevents accidental release of refrigerant. By adding refrigerant, it is suitable for household and automobile air conditioner. Technical data: Blue Material: aluminum + copper + rubber Quantity: 1 Length of the left tube: 160 mm / 6.30 inch Straight tube length: 160 mm / 6.30 inch Low pressure meter: 350PSI Refrigerant: R134A Instrument diameter: 72 mm / 2.83 inch Instrument height: 30 mm / 1.18 inch Length: 410 mm / 16.14 inch Thread: M14.1 / 2 inch Hose connector: 1/2 ACME Product weight: about 238 grams / 8.41 ounces Package weight: about 245 grams / 8.63 ounces Package size: about 20 * 15.5 * 3 cm / 7.87 * 6.10 * 1.18 inch Speaker: 1 * refrigerant pipe measuring kit Different brands of refrigerant charging kits The following method is: 1. It is necessary to prepare an additional tube for the self-check of the car air conditioner. 2. Vehicle mounted R134 refrigerant cylinder. 3. Now start to test the pressure in your car: first use the plug-in device to turn the sleeve at the end of the DIY filling tube clockwise to reach Toutenhaut, screw the refrigerant bottle in the cap and tighten it. 4. Identify the low voltage interface. Usually there is a small blue or black cap on the left side of the cover, To tighten (low pressure cover), please unscrew the small cover. 5. Start the car engine, then turn on the AC switch of the air conditioner, turn on the fan fully, turn it on and wait for three minutes. Connect the DIY interface to the low voltage of the car air conditioner. 6. After connecting the DIY hose to the low pressure port, the scale indication on the DIY pressure gauge will appear immediately. Currently on the DIY group The manometer scale corresponds to the pressure in the air conditioning system. For an overview of the system, see the pressure scale on the manometer. Negative pressure. At what pressure must the refrigerant be added? There is currently a knowledge statement The pressure in the control system changes with the change of the temperature of the external environment, as shown in the figure below, the temperature and air are in Fahrenheit Adjust the comparison table of system pressure to confirm the system pressure. Higher system pressure indicates that the system has cooled down If the refrigerant is higher than normal, it must be topped up. Outdoor ambient temperature pressure (Fahrenheit temperature) with low pressure measurement pressure, the value of the following dynamometer is the theoretically constant temperature in the laboratory The outdoor temperature during use cannot meet this requirement. When Owner Friends Use It Please calculate according to the minimum value in the table calculation method, then subtract 10PSI from the minimum value. When the system is under normal pressure, the pressure cannot exceed the minimum value. When the pressure is exceeded, the compressor will be automatically protected During this period, the cooling effect will be weak For example, when the outdoor temperature is 30 degrees, the household electric meter will show 45PSI-55PSI, This is a constant temperature value, should we use 45PSImus1OP in the calculation? If it is pressure, the result is 35ESI, This is the normal pressure in the system, it is better not to exceed this value.