Air Conditioning Fitting Charging Hose Safety Valve

Access valves, also known as non-return valves or check valves, play a crucial role in the refrigeration system of refrigerators. It has the ability of unidirectional conduction and reverse cut-off, that is, it only allows the refrigerant to flow in a certain specified direction and prevents it from flowing back. When the refrigerant flows forward, the access valve opens to allow the refrigerant to pass through smoothly. When the refrigerant attempts to flow in the opposite direction, the access valve automatically closes to prevent its flow.

product details

Product Description

Access valve is mainly composed of components such as a nylon valve needle, valve seat, limit ring and housing. Its internal structure may vary depending on the type, such as a ball valve or a needle valve. On the outer surface of the check valve, the direction of the refrigerant flow is usually marked with an arrow to ensure that it is not connected in reverse during installation.

In the refrigeration system of a refrigerator, the main function of the access valve is to prevent the high-temperature and high-pressure vapor inside the compressor from flowing back into the evaporator when it stops, which could cause the evaporator to heat up and thus reduce the refrigeration efficiency. By connecting access valve, the high and low pressure inside the refrigeration system can be quickly balanced when the compressor stops, facilitating a restart.

Application scenario

1. Refrigeration system
Refrigerator
air conditioner

2. Industrial fluid control

3. Maintenance operation assistance

Feature

1. Equipped with imported valve inside of reliable performance.

2. Double sealing ensure leak-tight.

3. Copper tube of various lengths and hardness are available.

4. Valve bonnet is knurled for easy handing.

Technical Parameters

1. Applicable：HCFC and HFC

2. Applicable Medium Temperature：-25°C~+120°C

3. Max Operating Pressure：3.0MPa

4. Max Allowable Pressure：3.0MPa

Structure

1. Flat cap

2. Needle valve cap

Specification

Type	Connection	Size	Overall Dimensian					Hexagonal S	Thread M
			A	B	φD	H	L
TypeA	1/4 SAE	1/8”	60	14	3.17		94	11	7/16-20UNF
		3/16°			4.76
		1/4"	90		6.35		124
Type B	1/4 SAE	1/4"	90	14	6.35	118		12	7/16-20UNF
	1/2 SAE			16				14	/2-20LNF
	1/4 ACME								/2-16ACME