PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Specification and use of PTFE bellows
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-10-18
Visits:
PTFE bellows refers to a tubular elastic sensitive element connected by a foldable wrinkle sheet along the direction of folding and stretching. Bellows are widely used in instrumentation, the main use is as a pressure
The measuring element of a measuring instrument that converts pressure into displacement or force. The corrugated pipe wall is thin, the sensitivity is high, and the measuring range is tens of Pa to tens of MPa.
Features:
Use temperature:-200 degrees to 260 degrees
Easy processing: can flanging
Aging resistance: can be exposed to ozone and sunlight for a long time without aging
Corrosion resistance: able to withstand all strong acids, strong oxidants, strong reducing agents and various organic solvents except molten alkali metals, fluorinated media and those above 300 °
Figure 1: PTFE bellows Source: Dankai
Specifications:
Metric: outer diameter 6mm 8mm 10mm 16mm 20mm 25mm 38mm 60mm, etc.
Imperial: 1/8 inch 1/4 inch 3/8 inch
1/2 inch 3/4 inch 1 inch
Other specifications can be customized
Bellows: A pressure measuring elastic element in pressure measuring instruments. It is a cylindrical thin-walled corrugated shell with multiple transverse corrugations. The bellows is elastic and can be used under pressure, axial
Force, lateral force or bending moment can produce displacement. Bellows are widely used in instrumentation, the main purpose is to be used as a measuring element of pressure measuring instruments, the pressure is converted
movement or force. The corrugated pipe wall is thin, the sensitivity is high, and the measuring range is tens of Pa to tens of MPa. In addition, the bellows can also be used as a sealing isolation element to separate the two media
or prevent harmful fluids from entering the measuring part of the device. It can also be used as a compensation element, using its volume variability to compensate for the temperature error of the instrument. Also sometimes used as two
Elastic coupling joints of parts, etc. Bellows according to the material can be divided into metal bellows, non-metal bellows two; according to the structure can be divided into single layer and multilayer. Single-layer corrugated pipe application is more
More. Multi-layer bellows high strength, good durability, low stress, used in important measurements. The materials of the bellows are generally bronze, brass, stainless steel, Monel and Inconel.
Alloy, etc.
Figure 2: PTFE bellows Source: Dankai
PTFE corrugated pipe and stainless steel metal hose function is similar, the appearance of fine organization, no mechanical impurities, high strength, excellent chemical stability, corrosion resistance, sealing, self
Lubrication non-stick, electrical insulation and excellent anti-aging ability, can be used for a long time at -60~250 ℃, with reliable and excellent corrosion resistance, used to transport strong corrosion medium at high temperature
Quality.
Corrugated pipes mainly include metal bellows, corrugated expansion joints, corrugated heat exchange tubes, diaphragm bellows and metal hoses. Metal bellows are mainly used to compensate pipeline thermal deformation, shock absorption,
Absorbing the effects of pipeline settlement and deformation, it is widely used in petrochemical, instrumentation, aerospace, chemical, electric power, cement, metallurgy and other industries. Plastic and other materials bellows in the medium conveying,
Power threading, machine tools, home appliances and other fields have an irreplaceable role.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
Bellows, with, elastic, high temperature resistant
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