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

Abstract

The invention discloses an O-shaped seal ring rubber sizing material of a gate valve end surface, 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 sebacic acid dioctyl phthalate, 10-15 parts of kieselguhr, 3-4 parts of accelerator M, 1-2 parts of 2,2'-dibenzothiazoledisulfde (DM) and 1-2 parts of tetramethylthiuram disulfide (TMTD); 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 ethylene propylene rubber, 1-2 parts of sodium 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 graphite powder, 5-8 parts of sebacic acid dioctyl phthalate, 0.5-1.5 parts of dicumyl peroxide (DCP), 0.2-0.8 part of Triallyl Iso cyanurate (TAIC) 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 gate valve end surface 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 rubber composite material processing, in particular to a rubber compound used for producing 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 invent...

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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

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