Expanded graphite types can be divided into:
Flexible graphite sealing material according to their purpose, divided into two categories: one for a variety of pumps, valves, packing the kettle on; the other is used for a variety of pipe graphite gasket flange.
① packing
Expanded graphite packing is cut to the proper width and length of the strap around the different specifications of the metal mold, directly on the press-molded preform filler for a variety of cut-off valves, valve, regulating valve, ball valves, valves, etc. plus .
② gasket
Usually divided into two types, one is the pure graphite gasket, which is press-molding expanded graphite pellets directly in a metal mold, expanded graphite sheet can also be used directly punched or cut from; the other is a graphite spiral wound gasket , is a metal band, and expanded graphite rolled into overlapping, it can be used at higher pressures.
③ graphite packing
Graphite packing with cotton fiber or graphite fiber braided with graphite foil roll from the sealing material. Cotton fiber core graphite packing (SPM type) for pressure 12MPa, sealing pipes, valves, pumps and other temperature below 200 ℃, the contact medium may be water, water, groundwater, seawater, oil and the like. Graphite fiber core graphite packing (SPS) is used for pressure 12MPa, temperature of 350 ℃ or less piping, valves, pumps and other seal, contact with the media in addition to a variety of water, oils, you can also contact with acid substance .