The type of hose connector can be determined from the appearance, the sealing surface form and the thread form. From the appearance, it can be determined whether it is a direct head or a bent joint. Today, Xiaobian talked about how to determine the form of the hose connector.
Determine the sealing type of the hose joint:
-Thread
-O-ring
-Mating angle or metal-metal connection
-Angle with O-ring and related fit
Thread: After the external thread and the internal thread are connected, the compression between the tooth forms can form a seal. The typical thread seal connection is a tapered thread seal.
O-ring: The O-ring on the externally threaded joint is pressed against the corresponding internally threaded mating surface to form a seal. This type of seal is usually used in high-pressure systems.
Matching angle or metal-to-metal hard seal: After the thread is locked, the metal slopes at a certain angle fit together and squeeze tightly together to form a seal after deformation.
Bevel with O-ring: This joint combines the metal bevel seal and the O-ring seal together. When the nut is locked, the sealing surfaces fit together and deform the O-ring between the two.
Determine thread type
The correct determination of the thread type is basically difficult for the naked eye, because the thread form of various joints looks similar from the outside, and a professional measuring tool such as a pitch gauge or caliper is required for correct discrimination.
Pitch gauge
The pitch gauge can be used to measure the thread pitch more intuitively. Note the difference between metric threads and inch thread gauges: the value marked on the metric thread gauge is the pitch of the metric thread, while the value marked on the inch thread gauge is the number of threads within one inch of length.
Caliper
Vernier calipers can be used to measure the major diameter of the external thread and the minor diameter of the internal thread to further determine the thread.
 In order to facilitate customers to identify threads, Parker can provide a small tool kit for thread identification, including pitch gauges, calipers, thread templates, user guides, etc. As a portable tool, it is an ideal on-site thread identification tool. Of course, if you feel that the selection of hose connectors is very troublesome, you can choose a professional company as technical support.