Ningbo Tecson Sealing Technology Co.,Ltd
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Tecson Sealing Technology

Address: No.1,Huapeng Rd, Kandun District, Cixi City, Zhejiang Province, P.R.C

Tel: 0086-574-23707877

Fax: 0086-574-23707878



PTFE Gaskets The Principle

(1) liquid seal: With the rapid development of polymer organic synthesis industry, in recent years there have been liquid sealant, used in static seal; this new technology, PTFE Gaskets usually called liquid seal. The principle of liquid seal is the use of liquid sealant adhesion, mobility and monomolecular membrane effect (the thinner the natural recovery of the membrane tend to), PTFE Gaskets under appropriate pressure to make it like a gasket to play the same role. So the use of the sealant, also known as liquid washers.

(2) graphite plate seal: in people's impression, graphite is brittle material, lack of flexibility and toughness, but after special treatment of graphite, but it is soft texture, PTFE Gaskets good elasticity. In this way, the thermal resistance and chemical stability of the graphite can be displayed in the gasket material; and the gasket has a small pressing force and the sealing effect is excellent. This kind of graphite can also be made with the belt, with the metal band with excellent performance of the winding washers. PTFE Gaskets Graphite plate seals and graphite - metal spiral washers appear, is a major breakthrough in high temperature corrosion resistance seal. Such gaskets, foreign countries have been mass production and use.

(3) polytetrafluoroethylene raw material seal: PTFE is also a polymer organic compounds, PTFE Gaskets it sintered into products, called raw material, soft texture, but also a single molecular film effect. Made with raw materials made with a raw material belt, can be rolled into a long-term preservation. The use of free to shape, any joints, as long as a pressure, it will form a uniform role in the sealing ring membrane. PTFE Gaskets As a valve in the valve body and the valve cover between the gasket, can not remove the valve or the case of the gate, pry open a gap, stuffed into the raw material to go on the line. Compact force, PTFE Gaskets non-stick hand, nor stick flange surface, the replacement is very convenient. For the tongue and groove flange the most appropriate. Teflon raw materials, but also made of tubular and rod-shaped, for sealing.

(4) metal hollow O-ring: good elasticity, compact force, PTFE Gaskets a self-tightening effect, can choose a variety of metal materials, which in low temperature, high temperature and strong corrosive media can adapt.

Adapt to working pressure and temperature. Not only to consider the peak pressure and temperature, but also to consider their fluctuations and rate of change. PTFE Gaskets Seal gasket is necessary to withstand pressure and temperature, but also because of pressure and temperature changes and leakage

Consider the chemical corrosion and electrochemical corrosion of the medium. PTFE Gaskets If the reaction tank, should consider the corrosion of raw materials, finished products, corrosive and corrosive reaction process. If the medium is a solvent, consideration should be given to the dissolution of the gasket.

The media can not leak from the gasket and the flange surface (interface leak), can not leak out from the gasket itself (osmotic leakage), which depends on the extent of the flange tightening, but also depends on the nature of the gasket itself, so To seriously consider, especially for toxic gases, PTFE Gaskets vacuum, radioactive media, flammable and explosive materials more attention. Not only requires the initial state of the gasket sealing is good, but also requires long-term operation is not fatigue, no relaxation.

Flange sealing surface with a plane, bump, PTFE Gaskets tongue and groove and other forms, the gasket should be the corresponding. Flange sealing surface surface finish, hardness is different, there are different requirements on the gasket, gasket should also be the corresponding. If the flange is not large, it is necessary to use not often strong gasket.

Take care of special requirements. PTFE Gaskets If a medium does not allow the amount of fiber mixed, do not use asbestos rubber sheet and other fibrous washers. Some parts of the vibration is very large, we must use strong anti-vibration gasket. For difficult to repair the place,PTFE Gaskets on the use of durable gaskets. And so on, all need to use the brains.