1. coffee machine Teflon pipe industry standard

Teflon tube for food grade coffee machine; Teflon tube for coffee machine

2. Teflon Introduction

PTFE pipe is the use of high-quality plunger extrusion pipe, the use of special processing technology, so that the steel pipe and plastic pipe closely combined, can withstand positive pressure 1.6Mpa, negative pressure: 77Kpa; can be in -60 ℃ ~ 260 ℃ within the normal use, with reliable and excellent corrosion resistance. Transporting strong corrosive gases and liquids at high temperatures, which cannot be replaced by other pipelines. PTFE tube material: PTFE resin. Teflon tube temperature:-80~260 ℃.

3. Teflon Performance

Teflon tube performance: strong acid: strong alkali chemical reagent high temperature self-lubricating.

Polytetrafluoroethylene (PTFE) has excellent chemical stability, can withstand all strong acids, strong bases, strong oxidants, and does not work with various organic solvents. PTFE has a wide range of temperature, and can be applied to -180 ℃ ~ 250 ℃ for a long time under normal pressure. After being treated at 250 ℃ for 1000h, its mechanical properties change very little. PTFE has a very low friction coefficient, is a good antifriction, self-lubricating material, its static friction coefficient is less than the dynamic friction coefficient, so used to make the bearing has the advantages of small starting resistance, smooth operation.

Because PTFE is non-polar, heat-resistant and non-absorbent, it is also an excellent electrical insulating material. Also has excellent aging resistance, non-sticky and non-flammable. PTFE made of bars, pipes, films, bearings, gaskets, valves and other profiles and parts, widely used in machinery, chemical, aviation, electrical and electronics, national defense industry, cutting-edge technology, medical and health and electrical insulation and other fields.

4. old and new coffee machine on Teflon tube changes:

(I) problems with old products are as follows:

(1) The casing assembly used has high processing requirements. Otherwise, there is often insufficient force and the pipe is pushed out and taken off, resulting in water leakage.

This pipe assembly is made of stainless steel inner bushing Teflon pipe copper outer ring sleeve through the joint, the tightness of the joint force directly affects the pipe slip or not. The tightness of the joint is not only related to the joint, but also the tolerance of the inner and outer diameters of the stainless steel inner bushing, Teflon pipe and copper outer ring is extremely related to the joint force. If the joint is too loose and the tube is detached, it is not easy for personnel to assemble if it is too tight. Therefore, the tolerance of the inner and outer diameters of the three components is extremely high, and they affect the convenience and certainty of assembly.

(2) The processing of the pipe assembly is time-consuming. In addition to the assembly, there must be the joint of the stainless steel inner bushing Teflon pipe and the joint of the copper outer ring of the Teflon pipe.

(3) The high cost of the pipe assembly includes a stainless steel inner bushing and a teflon sleeve (a necessity) and a copper outer ring.

(4) Since there is a stainless steel inner liner in the Teflon tube, the smaller diameter of the tube directly affects the flow.

(5) Due to the stainless steel inner liner in the Teflon tube, the diameter of the tube becomes smaller. In case of dynamic vapor pressure, the tube will often have higher pressure at the position close to the stainless steel inner liner, resulting in expansion and bulging, and even unsafe phenomenon of 100-degree boiling water splashing of the tube.

(II) new product Teflon tube assembly finished product is improved for the shortcomings of the existing connection mode. The improvement is described as follows:

(1) The metal inner bushing is discarded and the material cost is reduced.

(2) Discard the metal outer bushing and save manual hours for inner joint processing.

(3) Discard the metal outer bushing and save manual hours for outer joint processing.

(4) The metal inner bushing is not used to avoid the inner diameter of the pipe being reduced and the flow rate is not affected.

(5) Discard the metal inner bushing to avoid the inner diameter of the pipe being reduced and reduce the risk of pipe explosion under dynamic steam pressure.

(6) the metal outer bushing is not used, reduce the cost of copper ring material.

(7) Discard the metal outer bushing and do not use the assembly method to avoid the problem of tube dropping and leakage due to poor assembly.

5. coffee machine special teflon tube processing

In daily life, we can often see Teflon tube, then, Teflon tube in the process we need to pay attention to what matters.

Note in the process of teflon tube processing:

Teflon pipe construction process, there are the following points need to pay attention:

1, the seamless steel pipe according to the actual size of the material, the steel pipe and welding ring for welding, the ring can be used manual argon arc welding, welding spatter with a file to deal with clean, and the fillet weld into a fillet, no sharp edge.

2. Drill a small hole at the end of the steel pipe, make a clear mark, and shall not be blocked. This hole is used to discharge the residual gas between the steel pipe and the Teflon pipe during heating, and to observe whether the PTFE pipe is damaged or leaked during pressure test.

3. The steel pipe shall be pre-assembled before lining. Asbestos barking pads of appropriate thickness shall be added at the interface during assembly to meet the overall size requirements after lining.

4. The assembled seamless steel pipe shall be sandblasted to remove the rust on the inner wall, and then the inner cavity of the pipe shall be purged with compressed air. Insert Teflon pipe into steel pipe. If some Teflon tubes are not round and cannot be inserted, hot water, steam or medium frequency heating furnace should be used to heat the Teflon tubes at a temperature not exceeding 100 ℃.

5. The length of the flanging should be considered when cutting the Teflon tube. Generally, a length of 35-40 is left above the welding ring surface. Before flanging, an asbestos barking gasket should be set on the Teflon tube. The Teflon tube is flanged in two steps. The first step is to turn it into a bell mouth. The tire used for this flanging is a tapered cast aluminum piece. When flanging, heat the tire with oxygen-acetylene flame. Measure the temperature of the tire with a semiconductor surface thermometer. The temperature of the tire shall not be too high, and the temperature shall be controlled between 260 ℃ and 280 ℃. When flanging, slowly press down the heated conical tire. When the tire is pressed to the edge of the welding ring, do not press it again. At this time, water should be used for cooling. When it is cooled to the ambient temperature, remove the tire. The flanging of the second step further plasticizes the nozzle. This time the tire is flat, and the heating method and temperature control of the tire are the same as in the first step.

6. After heating, slowly press down the tire and flatten it completely, then cool it to ambient temperature with water, and then remove the tire.

7. Put the blind plate on the lined pipeline into a special heating cylinder, connect the compressed air pipe, heat the cylinder with intermediate frequency heating method, heat the pipeline to about 280 ℃, and then slowly pass 8-lOkgf/cm2 of compressed air. Place the Teflon pipe in the water tank, immerse the steel pipe in the water, slowly introduce 15kgf/cm2 compressed air, and check whether bubbles are generated at the drilling place. If bubbles are found, it is proved that the Teflon pipe is broken. The reason is mainly because of uneven heating or inflation speed too fast. The lined steel pipe shall be sealed at both ends with wooden blind plate to prevent the Teflon pipe from being damaged.

6. food grade coffee machine teflon tube manufacturer

Teflon tube little sister's factory;

7. how to judge the quality of Teflon tube

In recent years, the performance of Teflon tube has been greatly improved, and it has been favored by more consumers. The following is a brief introduction to a few points so that you can quickly understand the quality of Teflon tubes through these tips. Here, the Teflon tube manufacturer for coffee machine (Teflon tube little sister's home) shares a few tips for you to quickly know whether Teflon tube is good or bad.

(1) Touch, through the hand to know whether there are other materials added.

(2) Look, some pipes have special colors. If there are other colors, it means something has been added.

(3) smell, now most of the pipe or smell, has not reached the level of green environmental protection.

(4) through the elastic test can be seen that the pipe is good or bad.

At present, our family will decorate many water pipes, heating pipes and other pipes, and this pipe is innovated according to the different needs of the industry. Not only the emergence of new pipes, such as Teflon pipes, but also the transformation of the original stainless steel pipes, so that we can make better use of them and bring convenience to our industry and families.

Shenzhen Dankai Technology Co., Ltd. (ShenZhen DanKai Technology Co., Ltd.), whose predecessor was the Fluoroplastic Material Factory of Dongguan Dandi Insulation Material Co., Ltd. established in 1998, specializes in the research and development, production and sales of FEP, PFA, PTFE and other fluoroplastic tube rod sheet membrane products and other insulation materials. The company has international standards of senior R & D team and the introduction of foreign fluorine plastic products production line. Some fluoroplastic products through ISO9001, SGS, FDA certification, Huawei, Foxconn, the United States, ZTE, Intel, AirTAC and other domestic and foreign cooperation customers fully affirmed. The company's main products are: ① pipes: Ptfe pipes, Fep pipes, Pfa pipes, Pvdf pipes; ② Heat shrinkable tubes: Ptfe heat shrinkable tubes, Fep heat shrinkable tubes, Pfa heat shrinkable tubes, Pvdf heat shrinkable tubes; ③ Plate rod film: Ptfe plate rod film, Feep plate rod film, Pfa plate rod film, Pvdf plate rod film, etc. PE: PE, special, spiral tube, spring tube, rotary cutting tube, welding rod, tee, straight, gasket, joint, cone rod, flared tube, sealing tube, braided tube, corrugated tube, etc. At the same time can be customized according to customer requirements processing production of various specifications of fluorine plastic products.