O-shaped compound sealing shim with U-shaped protective layer for plate type heat exchanger

• Main Authors: ZHAN FUCAI, XIAN CHUANPING, LI JINGCAI, JIANG YING, ZHANG SHUMIN
• Format: Patent
• Language: Chinese; English
• Published: 11.07.2012
• Subjects: BLASTING; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MECHANICAL ENGINEERING; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; WEAPONS

The utility model relates to a sealing shim used on a heat exchanger, in particular to an O-shaped compound sealing shim with a U-shaped protective layer for a plate type heat exchanger. The sealing shim comprises a main body of an O-shaped sealing shim in a ring shape, wherein the main body of the sealing shim comprises a rubber matrix and a polytetrafluoroethylene film layer coated on the rubber matrix in a seamless way by vulcanization; and the polytetrafluoroethylene film layer is in a polygonal structure of which the end face is in a U shape, and one end of an opening faces to the outer side of a circular ring. According to the O-shaped compound sealing shim with the U-shaped protective layer for the plate type heat exchanger, the structure is simple and reasonable. The O-shaped compound sealing shim with the U-shaped protective layer for the plate type heat exchanger has excellent chemical stability and corrosion resistance, a good sealing effect and long service life.