Soft sealing fluororubber valve seat and production process thereof
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A technology of fluorine rubber valve seat and production process, which is applied in the field of soft sealing fluorine rubber valve seat and its production process
Pending Publication Date: 2021-09-10
上海正兴阀门制造有限公司
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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
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Embodiment 1
[0056] The formula of the soft-sealed fluorine rubber valve seat includes the following ingredients in parts by weight:
[0057] Type A fluorine rubber 50 parts
[0058] Type B fluorine rubber 25 parts
[0059] 25 parts of powdered carbon fiber
[0060] 5 parts of cross-linking active agent
[0061] Calcium hydroxide 5 parts
[0062] Vulcanizing agent 0.1 parts
[0063] AF vulcanization accelerator 1 part
[0064] 0.1 parts of BPP vulcanization accelerator
[0065] Palm wax 0.1 parts
[0066] Viscosity improver 0.1 part.
Embodiment 2
[0068] The formula of the soft-sealed fluorine rubber valve seat includes the following ingredients in parts by weight: 60 parts of A-type fluorine rubber
[0069] Type B fluorine rubber 32 parts
[0070] 32 parts of powdered carbon fiber
[0071] 13 parts of cross-linking active agent
[0072] Calcium hydroxide 8 parts
[0073] 1.5 parts of vulcanizing agent
[0074] AF vulcanization accelerator 5 parts
[0075] 1.5 parts of BPP vulcanization accelerator
[0076] 0.5 parts of brown wax
[0077] Viscosity improver 0.5 part.
Embodiment 3
[0079] The formula of the soft-sealed fluorine rubber valve seat includes the following ingredients in parts by weight:
[0080] Type A fluorine rubber 70 parts
[0081] Type B fluorine rubber 40 parts
[0082] 40 parts of powdered carbon fiber
[0083] 20 parts of cross-linking active agent
[0084] Calcium hydroxide 10 parts
[0085] 3 parts vulcanizing agent
[0086] AF vulcanization accelerator 10 parts
[0087] 3 parts of BPP vulcanization accelerator
[0088] 1 part brown wax
[0089] Viscosity improver 0.1-1 part.
[0090] In view of the above-mentioned examples 1-3, the present invention also proposes a production process of a soft-sealed fluorine rubber valve seat. According to the formula, each component is added to the internal mixer for mixing for 15-25 minutes. After mixing, open the internal mixing The machine transports the mixed material to the open mill to release the flakes, to be processed;
[0091] Carry out the first vulcanization heating molding,...
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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...
Claims
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Application Information
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