2015年5月20日星期三

Pipe joints leak prevention


In the hydraulic banjo fittings system, whether it is the metal fittings or hose connectors are prone to leakage problems. For card sets of pipe joints, mostly due to the pipeline by large external force or impact, so that the card sleeve loose or deformed pipe ends and cause leakage, you should check whether the card holder out of round, edge or without defects, whether the pipe end in good condition and the extent of the compression ferrule nut, but also the elimination of external piping. For flared fittings, mostly due to excessive flaring, undesirable quality or dismantle flaring resulting deformation or cracks caused by leaks, this time can be re-flared front end truncated. If the top male and female cones pressure seal, the leakage is mostly due to two cone damage, it is available for cone grinding abrasive sand. In some use "о" by the end face or outer ring sealed case, the leakage following reasons: "о" ring deformation caused by aging or leakage; "о" ring assembly is not in place, so that the two-plane connection When the pressure is uneven or "о" ring is cut causing leakage; "о" ring uncompressed, insufficient amount of elastic deformation caused by leakage; "о" mouth-ring groove stop too deep and cause leaks. In this regard, the need to re-select the same diameter and cross-sectional coarse "о" rings, can also be sealed with a flat opening slot stop cutting or grinding, to reduce the groove depth of mouth only, so "о" ring has sufficient elastic deformation (compression in general should be between 0.35-0.65mm). For the use of oil sheet, wool felt, soft steel board, combined sealing gasket or pipe joints leak sealant, No matter what the material, you should first check the seals without damage, deformation, aging and rough through the large, etc. and then take the appropriate measures.

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