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How about the performance of PTFE bellows?
- Categories:Industry news
- Author:PFA tube lady
- Origin:PFA tube lady
- Time of issue:2006-10-21 10:03
- Views:
How about the performance of PTFE bellows?
- Categories:Industry news
- Author:PFA tube lady
- Origin:PFA tube lady
- Time of issue:2006-10-21 10:03
- Views:
1. ptfe corrugated pipe is also called Teflon corrugated pipe, and its price can be understood in detail. Polytetrafluoroethylene bellows refers to a tubular elastic sensitive element connected by foldable corrugated sheets in the direction of folding and stretching. Bellows are widely used in instruments and meters, and their main purpose is to convert pressure into displacement or force as a measuring element of pressure measuring instruments. The wall of the corrugated tube is thinner, and the sensitivity is high, and the measurement range is from tens of Pa to tens of MPa.
Its open end is fixed, and the sealed end is in a free state, and an auxiliary coil spring or reed is used to increase elasticity. When working, under the action of internal pressure, it stretches along the length of the pipe, causing the movable end to produce a displacement in a certain relationship with the pressure. The movable end drives the pointer to directly indicate the size of the pressure.
Bellows are often combined with displacement sensors to form a pressure sensor that outputs electricity, and is sometimes used as an isolation element. Since the expansion of the bellows requires a large volume change, its response speed is lower than that of the Bourdon tube. The bellows is suitable for measuring low pressure.
PTFE tube, scientific name PTFE tube (F4 tube, PTFE tube for short) is a high-quality plunger extruded tube, using a special processing technology to tightly combine the steel tube and the plastic tube, and can withstand positive pressure 1.6Mpa, negative pressure: 77Kpa; it can be used normally within -60℃～+260℃, with reliable and excellent corrosion resistance. Transporting highly corrosive gases and liquids at high temperatures cannot be replaced by other pipelines.
PTFE pipes include extruded pipes, corrugated pipes, heat shrinkable pipes, plates, rods, films and other products. Different products have different application fields.
Figure 1: PTFE bellows Source: Shenzhen Dankai
Characteristics of PTFE bellows:
1. The operating temperature range is very wide (from -200 degrees to +260 degrees Celsius)
2. Basically have corrosion resistance to all chemical substances except some fluorides and alkaline metal liquids.
3. Excellent mechanical properties including aging resistance, especially for bending and swing applications.
4. Outstanding flame retardancy.
5. Excellent insulation characteristics (regardless of its frequency and temperature)
6. Very low water absorption, and has a series of unique properties such as self-lubricity and non-stickiness
2. Fluoroplastic corrugated pipe manufacturers
Plastics that contain fluorine atoms in their molecular structure are collectively referred to as fluoroplastics. Fluoroplastics consist of fluorine-containing monomers. Monomers such as tetrafluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, vinylidene fluoride and vinyl fluoride are prepared by homopolymerization or copolymerization. With the continuous development of polymer technology, the variety of fluoroplastics is gradually increasing, and the scope of application is expanding.
Due to the fluorine atom contained in the molecular structure of fluoroplastics, it has many excellent properties, such as excellent electrical insulation, high heat resistance, outstanding oil resistance, solvent resistance and abrasion resistance, good moisture resistance and low temperature resistance . Therefore, fluoroplastics occupies an important position in the national defense, electromechanical, metallurgical, petrochemical and other industrial sectors.
In the production of wire and cable, the commonly used fluoroplastics include polytetrafluoroethylene, polyperfluoroethylene propylene, polyvinylidene fluoride, tetrafluoroethylene and ethylene copolymers, etc., which are used to manufacture various heat-resistant and high-temperature insulated wires. ) Well cables, geological exploration cables, heating cables, F-class and H-class motor lead wires, radiation resistant wires, electromagnetic wires, radio frequency coaxial cables, etc.
Fluoroplastic corrugated pipe refers to a tubular elastic sensitive element connected by a foldable corrugated sheet along the folding and stretching direction. Bellows are widely used in instruments and meters, and their main purpose is to convert pressure into displacement or force as a measuring element of pressure measuring instruments. The wall of the corrugated tube is thinner, and the sensitivity is high, and the measurement range is from tens of Pa to tens of MPa.
Figure 2: Fluoroplastic bellows Source: Shenzhen Dankai
Its open end is fixed, and the sealed end is in a free state, and an auxiliary coil spring or reed is used to increase elasticity. When working, under the action of internal pressure, it stretches along the length of the pipe, causing the movable end to produce a displacement in a certain relationship with the pressure. The movable end drives the pointer to directly indicate the size of the pressure.
Bellows are often combined with displacement sensors to form a pressure sensor that outputs electricity, and is sometimes used as an isolation element. Since the expansion of the bellows requires a large volume change, its response speed is lower than that of the Bourdon tube. The bellows is suitable for measuring low pressure.
Shenzhen DanKai Technology Co., Ltd. (ShenZhen DanKai Technology Co.,ltd.), whose predecessor is Dongguan Dandi Insulation Material Co., Ltd. Fluoroplastic Material Factory, established in 1998, specializes in FEP, PFA, PTFE and other fluoroplastic pipes R&D, production and sales of rod, sheet and film products and other insulating materials. The company has a senior R&D team with international standards and a production line of fluorine plastic products imported from abroad. Some fluoroplastic products have passed ISO9001, SGS, FDA certification, and have been fully affirmed by domestic and foreign cooperative customers such as Huawei, Foxconn, Midea, ZTE, Intel, and AirTAC. The main products of the company are: ①Tubes: Ptfe tube, Fep tube, Pfa tube, Pvdf tube; ②Heat shrinkable tube: Ptfe heat shrinkable tube, Fep heat shrinkable tube, Pfa heat shrinkable tube, Pvdf heat shrinkable tube; ③Plate rod Membrane: Ptfe board and rod film, Fep board and rod film, Pfa board and rod film, Pvdf board and rod film; ④Insulation materials: silica gel, PE, PVC, UPE, etc.; ⑤Special category: PFA imported connector, spiral tube, spring tube , Rotary cut tube, welding rod, tee, straight-through, gasket, joint, taper rod, flared tube, sealing tube, braided tube, bellows, etc. At the same time, fluorine plastic products of various specifications can be customized and processed according to customer requirements.
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