May I ask what material the gaskets you use are made of?
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May I ask what material the gaskets you use are made of? Do you cut your gaskets yourself or purchase them from outside? I want to buy a machine to cut the mats myself. Who knows this information.
For the PTFE pads we use, we first buy PTFE sheets and then cut them ourselves with scissors. . . .
There are stone grinding pads, asbestos boards, PTFE boards and winding pads
The material of the gasket depends on where it is used. Low-temperature and low-pressure rubber gaskets are sufficient. Asbestos gaskets are more versatile. Teflon gaskets with corrosive media that are not too high in temperature are better. Metal winding gaskets are used for steam. We generally purchase finished products. As long as you have a market, you can do it boldly.
PTFE is corrosion-resistant. You can buy ready-made copper gaskets that can withstand high temperatures. You can buy a machine to punch them yourself, then burn them yourself and perform quenching treatment. Graphite gaskets are used in many situations where copper gaskets cannot be used. There are no very good ones found in China because they are prone to slag. ……
Your question is too general. Different gaskets need to be used for different media, pressures, temperatures, and connection forms.
There are many materials for sealing gaskets, including metal, non-metal, and composite materials. They should be selected according to the working conditions. Nowadays, they can generally be purchased outsourced.
If the quantity is small, I don’t think it is necessary. You can just specify the size when purchasing. If it is an asbestos gasket, there is no need to purchase equipment, and it is all money. Just go to a small mechanical processing factory to make cutting abrasives, and then come back and make them yourself. If it is a winding mat, it is not necessary if the quantity is small. If there is more, you can buy equipment, but the investment is quite large. My opinion: Find a few more manufacturers to bid, and the price will be much lower. Doing it yourself is also labor-intensive. Material resources and prices are higher. If it's a special mat and you don't have the qualifications, it's best not to make it yourself and you'll be in a lot of trouble.
Metal wound sealing gaskets are made of V-shaped or W-shaped metal strips and non-metallic strips that are continuously wound without overlapping. The metal strips are fixed at the beginning and end by spot welding. Expanded graphite has the advantages of high temperature resistance, corrosion resistance, flexibility and good resilience. Among the wound sealing gasket series, its service temperature is higher. Metal wound sealing gaskets are most suitable for use in situations with alternating temperatures. Metal spiral wound gaskets are static sealing components for flange joints such as pipes, heat exchangers, and towers. Metal spiral wound gaskets are widely used in petroleum, chemical, electric power, shipbuilding, steel and other sectors. It is most suitable for use in high-temperature and high-pressure steam and alternating hot and cold temperature differences. It has good compression resilience and is suitable for sealing parts with severe temperature and pressure changes. It is a static sealing element for flange joints such as pipelines, valves, pumps, heat exchangers, towers, manholes, and hand holes. Widely used in petrochemical, machinery, electric power, metallurgy, shipbuilding, medical energy and aerospace sectors. We can produce according to ANSI, APL, DLN, JPL, BS and other standards, or the user can specify the requirements. The operating pressure is less than or equal to 25Mpa. If the gasket is used on a heat exchanger, a stainless steel wire inner ring with a diameter of 3.2M is generally recommended. The narrow strip material is the same as the steel strip. The narrow strip form is divided into adhesive type or coating type and anti-corrosion PTFE. Some are made of asbestos. Rubber gaskets are used on plate heaters. Graphite, copper, plastic, spring.
Generally, there are non-metallic flat gaskets such as rubber asbestos graphite and metal wound gaskets such as 304 wound flexible graphite gaskets and other non-metallic flat gaskets. You can buy the materials yourself and cut composite gaskets according to the size of the mating flange. For metal spiral wound gaskets, you can only buy stereotyped products. These are generally more expensive.