Grafseal

An advanced and adaptable valve stem/pump shaft packing material used for gland or stuffing box packing at site.

The self winding method and forming the required size of the gland packing at site is very practical and simple, especially as any dimension can be prepared quickly.

METHOD
A Pre-determined length of tape depending upon the radial width (the space between stem or shaft and the cylinder bore) is wrapped around the stem or shaft until the stuffing box is filled. The wound tape is then pushed down into the stuffing box and compressed to half its width by close fitting split pushers and the gland follower. With the help of a scale before and after compression of tape, the packing mechanic will be able to judge the extent of compression achieved. The stem or shaft under gland load should be turned every time before the next ring is formed. This process is repeated till the depth of the stuffing box is full.