Hose connector ferrule Precautions

Sleeve type hose connector has a simple structure , easy to use and do not have the advantages of welding . But in the high-pressure hydraulic system, if the improper operation will often cause leakage , affecting its widely used. After years of practice I summed up some experience , and achieved good results. Card sets of pipe joints mainly by a 24 degree taper hole connector body 1, with a sharp inner edge of the card sets 2 and play the role of compression nut 3 compression of three parts . Tighten the nuts 3:00 , lined butterfly valve ferrule 2 is advanced 24 degree taper hole and subsequently deformed, so that the card with the connector body cone sleeve forming spherical contact seal ; Meanwhile , the card edge embedded steel inner sleeve 4 the outer wall of the outer wall of the pressure out a ring groove , which play the role of a reliable seal . The best choice for stress relief annealing steel pipe 20 # fine extubation , it is a good card kit blade embedded in the outer surface of steel pipes , play a reliable seal.( 1 ) pre-① hose connector ferrule is the most important part of the pre-installed , directly affects the reliability of the seal . Generally require a dedicated preloader . Small diameter connector can be pre-installed in a vise . In practice, as the parent with a joint body , the nut , ferrule can be pressed onto the tube . There are card sets straight couplings , sleeve type end through turn heads, ferrule Hydraulic pipe fittings  and other types . I found that even with the same manufacturer 's batch of goods , these types of joint body tapered hole depth is often not the same , the result is caused by a leak , and this problem is often overlooked. The correct approach should be, what kind of pipe end connector body connection , the corresponding connection terminal is preloaded with the same type of connector , so to avoid possible leakage problems .② pipe end should be flush . After sawing the pipe should be flush grinding wheel and other tools , and deburring , cleaning with high-pressure air to blow before use.③ pre-installed , you should try to keep the tube and the coaxial connector body , if the pipe deflection is too large will cause seal failure.④ preloaded force should not be too large. Should make the inner edge ferrule tube wall just embedding , card sets there should be no significant deformation . During pipeline connection, then the provisions of the tightening force assembled . φ6-10mm ferrule tightening force of 64-115N, φ16mmr 259N, φ18mm for 450N. If the pre- deformed when the card holder will lose the seal.( 2 ) prohibits adding sealant filler. It was sealed in order to achieve better results, apply sealant put on the card , the results sealant being washed into the hydraulic system , causing the hydraulic components orifice blockage failures.( 3 ) when the connecting pipe , the pipe should have a sufficient margin deformation , to avoid the tube subjected to tensile stresses.( 4 ) connecting pipe should avoid subjecting it to lateral forces , lateral forces caused Mifengbuyan over the General Assembly .( 5 ) When connecting tubes , one should bear in good, avoid multiple disassemble , otherwise it will seal performance deteriorated.