Soft sealing fluororubber valve seat and production process thereof

Abstract

A soft sealing fluororubber valve seat and a production process thereof relate to the technical field of valve parts and production. The formula of the soft sealing fluororubber valve seat comprises A-type fluororubber, B-type fluororubber, powdery carbon fibers, a cross-linking activator, calcium hydroxide, a vulcanizing agent, an AF vulcanization accelerator, a BPP vulcanization accelerator, palm wax and a viscosity improver. The preparation process comprises the following steps of: adding all the components into an internal mixer for mixing according to the formula, then opening the internal mixer, conveying the mixed material to an open mill, and discharging slices for processing; carrying out first-time vulcanization heating forming and second-time vulcanization heating forming, raising the temperature to 100-185 DEG C from normal temperature, and keeping the temperature constant for 25 minutes to 1 hour; afterwards, after the temperature is increased by 8-16 DEG C each time, keeping the temperature constant for 3-5 hours until the temperature reaches 250 DEG C, and keeping the temperature constant for 18-35 hours; and closing a heating system, closing a circulating ventilator when the temperature is reduced to normal temperature, and finally taking out the product. The fluororubber valve seat is assembled on a pneumatic butterfly valve, can be used for replacing a hard sealing ball valve and a hard sealing butterfly valve at an outlet of a high-temperature compressor, and has market competitiveness.

Description

technical field [0001] The invention relates to the technical field of valve components and production, in particular to a soft-sealed fluorine rubber valve seat and a production process thereof. Background technique [0002] The pneumatic butterfly valve is composed of a pneumatic actuator and a butterfly valve. The pneumatic butterfly valve is a pneumatic valve that uses a circular butterfly plate that rotates with the valve stem to open and close to realize the activation action. It is mainly used as a cut-off valve, and it can also be designed to have the function of adjustment or section valve and adjustment. The butterfly valve operates at low pressure and large It is used more and more on medium-bore pipes. [0003] It is generally necessary to set a valve to control the discharge at the outlet of the high-temperature compressor. In the prior art, hard-sealed ball valves and hard-sealed butterfly valves are generally used. It is easy to wear the sealing surface, and...

AI Technical Summary

Problems solved by technology

However, the existing ordinary rubber can generally reach a maximum of about 10,000 times in the zero leakage test, and the maximum temperature does not exceed 200°C under high temperature conditions. In the working conditions with high requirements of alkalinity, corrosion, and wear resistance, the conventional soft rubber pneumatic butterfly valves, hard-sealed ball valves, and hard-sealed butterfly valves used in the prior art cannot meet the requirements. Therefore, there is room for improvement.

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