Packing sealing technology
The usual packing seal is to fill the packing into the packing cavity, and the packing is pressed against the surface of the shaft through the packing gland for sealing. It needs sufficient liquid to lubricate, and a certain amount of leakage is generated to achieve the effect of dripping water. Ensure the normal use of the filler.
With the continuous development of technology, some new materials are applied to the packing seal, and the effect of micro-leakage or complete leakage-free can be achieved when the pump is running well. The filler is a layered shear filler, commonly known as a soft filler. The layered shear filler is a new type of filler-sealing new product that is mixed with high-purity graphite, pure synthetic fiber, PTFE and organic sealant to form a cement-like substance with no specification restrictions. The sealing system consists of a front braided end ring, an injection system, a rear braided end ring and a packing gland. Because the soft filler will stick to the inner shaft and the outside of the stuffing box wall during use. The soft filler will undergo internal layer shearing, and the rotation will occur inside the soft filler with less intermincular attraction, rather than moving relative to the sleeve, thus protecting the equipment. At the same time, it can reduce the friction loss power and save energy. The synthetic material ring formed by the filler completely conforms to the irregularity of the stuffing box or the bushing, and there is no leakage or flushing, and the machining precision of the outer surface of the bushing is low, which can save flushing water and avoid the shaft. After the wear is worn, the surface accuracy is not up to the requirement and the bushing is frequently replaced, which reduces the workload of maintenance. No specification requirements can be reused to save inventory. The filling is simple, the injection filling can be realized, the continuous running time is long, the online maintenance can be realized, and the maintenance amount is small. The soft packing seal can significantly reduce power consumption, water consumption, spare parts loss, equipment loss, reduce the labor intensity of maintenance and repair, and thus reduce the accident rate. It is more economical and practical in actual production, and has wide application value and application prospect.
Packing seal is a commonly used form of seal, but due to its sealing structure and principle, it is prone to shortcomings such as medium leakage, shaft overheating and frictional resistance. In order to solve the problems of the traditional packing seal, new materials and technologies for sealing are continuously developed at home and abroad. Among them, the OTH-0020 series of soft fillers produced by Othello Corporation of the United States is a representative product. Applicable conditions: temperature -8-220 ° C; shaft speed 8-21 m / s; chemical medium tolerance: pH 2-13; pressure: ≤ 2.0 MPa; able to meet the sealing materials in modern industrial production Demanding requirements. With the advent of new sealing materials and sealing technology, the application range and sealing performance of packing sealing have been expanded, and the application prospects of packing sealing have become more and more extensive.
The white mud seal packing changes the packing pattern of the packing body as the main body, and there is no specification limit, which is suitable for all packing seals of the factory.
Detailed description: White mud seal packing is used for sealing of valves and pumps in industrial chemicals, food, drinking water, pharmaceutical, petroleum, metallurgy, chemical, fertilizer, power generation, papermaking, water treatment and other industrial fields.
Features:
1. White mud-like sealing mud is made of white PTFE fiber mixed with FDA-certified lubricant. It is non-polluting, non-toxic and conforms to food grade. The packing sealing mode with the packing as the main body has been changed, and there is no specification limit, which is suitable for all packing sealing devices of the factory.
2. No need for severe precision requirements for stuffing boxes and shafts, especially for seals of worn shafts.
Technical Parameters:
Temperature: -40 ° C - + 260 ° C; pressure: 30 MPa; chemical resistance: PH value 0-14.
The yellow mud sealant is used for sealing valves and pumps in industrial chemicals, food, drinking water, pharmaceutical, petroleum, metallurgy, chemical, fertilizer, power generation, papermaking, water treatment and other industrial fields.
Features:
1. Yellow mud-like sealing mud is made of yellow PTFE fiber mixed with FDA-certified lubricant. It is non-polluting, non-toxic and conforms to food grade. The packing sealing mode with the packing as the main body has been changed, and there is no specification limit, which is suitable for all packing sealing devices of the factory.
2. No need for severe precision requirements for stuffing boxes and shafts, especially for seals of worn shafts.
Technical Parameters:
Temperature: -40 ° C - + 260 ° C; pressure: 30 MPa; chemical resistance: PH value 0-14.
