What do a type c type d type of High pressure tubing joint stand for

Recently, some readers have given feedback on such a problem, that is, they saw a lot of letter codes, such as A, c, d, etc., when choosing high-pressure tubing joints, and these codes are not understood by non-professionals, but they can indeed affect the later use, so it is very troubling. 

At present, the most common hydraulic joint models are a, b, d, g, h, and k. Next, the editor introduces the meaning of these six quick joints respectively.

Type a joint is a flat sealed high-pressure tubing joint;

The B-type high-pressure tubing joint is a jacketed joint;

d type high pressure tubing joint is spherical sealing type, which is often used with c type high pressure tubing; The more special F-type high-pressure tubing joint is a disc type, which is mostly used in some construction machinery, and the high-pressure tubing is sealed on a plane by using two clips;

The G-type high-pressure tubing joint is used with the C-type joint at a matching Angle.

The h type is the g type joint with a sealing slot, and then sealed with the c type joint;

Type k uses the sealing method of Cashaw and piston, does not need nut reinforcement, so the disassembly is very flexible, is a quick change type joint.