shrapnel

产品banner
Your current location : Index >> Products >> VCR gasket
Your current location: Index >> Products >> VCR gasket

Product

VCR gasket jaws

2021-08-03 16:56:12
VCR gasket jaws
Detailed:

VCR is the abbreviation of the first three English words of the English Vacuum Coupling Radius Seal. It is the registered trademark of the Metal Gasket Face Seal Fitting of the Swagelok Company in the United States. VCR connectors were first used in the aerospace industry and are currently widely used in the semiconductor optoelectronic manufacturing industry. Probably because Swagelok's reputation and influence are too great, VCR has become synonymous with metal face seal joints (in fact, the names of metal face seal joints of different brands are different.


1. Working principle


VCR joint is a kind of face seal joint (Face SealFitting), and the sealing element adopts metal gasket. The metal gasket is compressed through the interlocking of the internal and external threads, and the gasket is deformed to a certain extent, so as to achieve the sealing effect.


There is also a more typical face-sealed joint is a VCO joint. Its working principle is the same as that of a VCR, except that the sealing element is an O-ring (the material is usually fluorine rubber or fluorine plastic), which is rarely used at present.


2. Features


The VCR connector has high cleanliness (the components are processed by electropolishing and cleaning processes) and good sealing. It is especially suitable for ultra-high purity systems, ultra-high vacuum systems and high-pressure systems that require no leakage. Because of the use of metal sealing elements, the rated operating temperature range of the VCR connector is relatively wide (the VCR connector using SUS316L gaskets has a temperature rating of 537C). The VCR connector is easy to install, has a minimum disassembly gap, and can be disassembled repeatedly (reinstallation after disassembly requires a new gasket).


Welding is required between the Gland of the VCR connector and the TUBE tube. VCR joints are generally used in conjunction with automatic welding joints. Use automatic welding joints (Weld Fittings) where disassembly is not required, and use VCR joints where disassembly is required (such as valves and equipment interfaces). Therefore, the samples of many manufacturers put VCR joints (metallic sealing joints) and automatic welding joints together (see Figure 3). Some manufacturers also refer to these two joints collectively as Clean Fittings.


3. Material


The material of Gland, Body and Nut is generally SUS316 or SUS316L. Gaskets are generally made of SUS316L, nickel or copper (copper gaskets are basically not used now). Gaskets are divided into silver-plated and non-plated.


The internal thread of the VCR female nut (FemaleNut) is silver-plated to prevent wear.


Previous:VCR gasket2021-08-03
Next:VCR gasket2021-08-03

Recently viewed: