PTFE Bellows CNC Machined Parts

Polytetrafluoroethylene bellows is also called PTFE bellows,PTFE corrugated pipe is made by special blowing and expanding molding, which is made by heating PTFE pipe to a certain temperature in a certain mold and giving a certain internal pressure inside the pipe to make the pipe expand transversely (blowing and expanding) and then cooling and shaping it.

Characteristics:

1, High temperature resistance 260 degrees , acid and alkali resistance, pressure resistance;

2, High transparency: lower refractive index in all plastics;

3, Aging resistance: can be exposed to ozone and sunlight for a long time without aging;

4, Corrosion resistance: able to withstand in addition to molten alkali metals, fluoride medium and higher than 300 ° in addition to all strong acids, strong oxidizing agents, strong reducing agents and a variety of organic solvents.

5, The production process can be flanging, connecting flange;

6, The corrugated shape of the U-shaped and straight tube, other shapes can be customized;

7, Commonly used colors: translucent, transparent, milky white tube.

Specification of PTFE pipes

Outside diameter (unit: mm) Other specifications can be customized:

Metric system: outside diameter 6mm 8mm 10mm 16mm 20mm 25mm 38mm 60mm etc..

Inch: 1/8 inch 1/4 inch 3/8 inch 1/2 inch 3/4 inch 1 inch

PTFE bellows FAQs

1, polytetrafluoroethylene bellows molding machine technology:

A corrugated pipe forming machine, including a base, a lower mold belt, a hydraulic rod and a fixed tube, said base is provided with a shock absorbing pad at the bottom, and there is a shock absorbing layer inlaid inside the base, said base is fixed with a lifting device, and the lifting device is connected to a support plate, said support plate is fixed with a connecting rod, and the connecting rod is connected to a lower conveying device, said lower mold belt is connected to a lower conveying device, and there is connected to the lower mold belt a molds, said hydraulic rod is fixed on the support plate, and the hydraulic rod is connected to the connection plate, said connection plate is connected to the upper conveyor, and the upper conveyor is fixed with a connection member, said connection member is connected to the upper mold belt, and both ends of the upper mold belt are connected with bolts, and said fixing tube is fixed on the upper conveyor, and the fixing tube is provided with nuts. The shock absorbing pads are fixed at the bottom of the base and the shape of the shock absorbing pads is wavy. A mold is attached to both the lower mold belt and the upper mold belt, and the lower mold belt and the upper mold belt are mounted in parallel. The connector includes a casing, a convex rod, a spring and a threaded hole, and the casing is provided with a convex rod, and a spring is connected to the bottom of the convex rod, and the convex rod is provided with a threaded hole. The upper mold belt is threaded with the upper conveying device, and the width of the upper mold belt is smaller than the width of the upper conveying device.

2, PTFE bellows seal:

Most of the applications on the market for the filled PTFE sealing surface, encounter particles of strong corrosive media, the sealing surface of the rapid wear and tear leading to seal failure; and with the supporting host of the pump application range of diversification, but also often applied to the media containing particles, the requirements of mechanical seals are also increased with the current market bellows mechanical seals are used as a way of transferring torque, making the product is not enough in terms of high temperature resistance. The product is insufficient in high temperature resistance. Contents of the invention The purpose of this utility model is to overcome the shortcomings of the existing technology, to provide a PTFE bellows drive to change the PTFE bellows and screw pin double drive structure, high temperature resistant corrosion and abrasion resistant PTFE bellows mechanical sealing device.

3, PTFE bellows turning:

PTFE bellows material is elastic, the structure can be retractable, turning processing fashion clamping difficulties, it is not easy to ensure the accuracy of the corrugated dimensions. To determine a specific bellows turning process, the elastic blank design of the elastic collet and through-hole set of fixtures, the use of fixed-size tool to ensure that the size of the corrugated dimensions, so that the accuracy of the bellows to meet the design requirements, the sealing performance is stable and reliable, long service life, has been widely used in the mechanical seal of chemical pumps. The process is simple and efficient, practical and reliable, and has a good reference for the processing of other plastic elastic thin-walled parts.

PTFE bellows production process

It is made by special blowing molding. The PTFE pipe is heated to a certain temperature in a certain mold, the pipe is given a certain internal pressure, so that the pipe is expanded horizontally (blowing) and then cooled and shaped and made. This corrugated pipe has the inherent properties of PTFE, but also has a high degree of flexibility and elasticity. According to the corrugated shape, there are three types: V-type, U-type and Ω-type. As a corrosion-resistant pipeline connectors, play a role in absorbing the changes in the length of the pipe caused by thermal expansion and contraction, and connecting the rigid and brittle pipeline misalignment connection. In order to improve the use of performance, bellows can also be enhanced with metal ring, metal sleeve, rubber and so on.

PTFE bellows production process

It is made by special blowing molding. The PTFE pipe is heated to a certain temperature in a certain mold, and the pipe is given a certain internal pressure to make the pipe expand laterally (blowing) and then cooled and shaped. This corrugated pipe has the inherent properties of PTFE, but also has a high degree of flexibility and elasticity. According to the corrugated shape, there are three types: V-type, U-type and Ω-type. As a corrosion-resistant pipeline connectors, play a role in absorbing the changes in the length of the pipe caused by thermal expansion and contraction, and connecting the rigid and brittle pipeline misalignment connection. In order to improve the performance, bellows can also be used metal ring, metal sleeve, rubber and other enhancements.

Application of PTFE bellows

1、It can be used as pipe reactor and exchanger in special occasions;

2、It can be used as feeding and discharging pipes of tanker, storage tank, container and reactor;

3、It can be used to replace graphite, ceramic, glass and other pipes with low mechanical strength;

4、It can be used for pipe misalignment connection or used to balance the pipe displacement caused by climate or other reasons, size change or used to eliminate high-frequency mechanical vibration.