O-shaped seal ring rubber sizing material of parallel gate valve end surfaces and preparation method thereof

Abstract

The invention discloses an O-shaped seal ring rubber sizing material of parallel gate valve end surfaces, which is formed by mixing a rubber sizing material A and a rubber sizing material B, wherein the rubber sizing material A comprises the following raw materials in part by weight: 85-95 parts of nitrile rubber 3304, 0.3-0.5 parts of sulphur, 4-6 parts of zinc oxide, 1-1.5 parts of stearic acid, 1-2 parts of 2,6-Di-tert-butyl-p-methyl phenol (BHT), 1-2 parts of anti-aging agent RD, 1-2 parts of anti-aging agent 4010Na, 3-4 parts of microcrystalline wax, 22-25 parts of fast extruding carbon black N660, 62-65 parts of high wear-resistant carbon block N330, 18-22 parts of dioctyl phthalate, 10-15 parts of magnesium carbonate, 3-4 parts of accelerator M, 1-2 parts of 2,2'-dibenzothiazoledisulfde (DM) and 1-2 parts of accelerator PZ; and the rubber sizing material B comprises the following raw materials in part by weight: 82-87 parts of polyacrylate rubber, 13-18 parts of silicon rubber, 1-2 parts of zinc stearate, 1-3 parts of anti-aging agent RD, 0.4-0.6 parts of gum easyT-78, 1-2 parts of Rhine wax, 45-55 parts of fast extruding carbon black, 10-14 parts of quartz powder, 5-8 parts of hydroxy silicone oil, 4-6 parts of Pb2O4, 0.7-0.9 parts of Trithiocyanuric acid (TCY) and 1-2 parts of accelerator Na-2. The seal ring rubber lining sizing material disclosed by the invention has good comprehensive performance. The produced O-shaped seal ring of the parallel gate valve end surfaces has the characteristics of good gas tightness, weather resistance, low temperature resistance, oil resistance and the like, and also has low material cost.

Description

technical field [0001] The invention relates to the field of processing rubber composite materials, in particular to a rubber compound for an O-shaped sealing ring on the end face of a parallel gate valve and a preparation method thereof. Background technique [0002] In the fluid pipeline system, the valve is the control element, its main function is to isolate the equipment and the pipeline system, adjust the flow, prevent backflow, adjust and discharge the pressure, so the requirements for the sealing and corrosion resistance of the valve are relatively high. The existing casting The high temperature resistance and corrosion resistance of the gate valve are not very good. The high temperature resistance and corrosion resistance of the rubber compound of the existing parallel gate valve end face O-ring seal are not very ideal. Although some have good corrosion resistance, the raw materials Expensive and costly. Contents of the invention [0003] The invention provides a...

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Problems solved by technology

[0002] In the fluid pipeline system, the valve is the control element, its main function is to isolate the equipment and the pipeline system, adjust the flow, prevent backflow, adjust and discharge the pressure, so the requirements for the sealing and corrosion resistance of the valve are relatively high. The existing casting The high temperature resistance and corrosion resistance of the gate valve are not very good. The high temperature resistance and corrosion resistance of the rubber compound of the existing parallel gate valve end face O-ring seal are not very ideal. Although some have good corrosion resistance, the raw materials Expensive, high cost

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