Rubber o-rings, rubber seal, rubber seal products categories: relative static static seal products and relative motion between the joint surface between faying surface of two kinds of dynamic sealing products.Static seal is mainly divided into: seals, rubber seal and contact seal, also can be divided into low pressure in the static sealing and high pressure static sealing.Commonly used in voltage static sealing material is qualitative soft, wide gasket sealing gasket, high voltage static seal with a hard material, metal gasket contact width is very narrow.Dynamic seal can be divided into reciprocating rotating seal and seal two basic types.According to seal and its role in relative motion components whether contact, can be divided into contact seal and non-contact seal.In general, contact seal sealing good, but restricted by friction and wear, is suitable for sealing surface linear velocity low places.Sealing of non-contact seal is poorer, suitable for high speed occasion.
In the selection of sealing
Basic requirements for sealing is good sealing, safe and reliable, long life, and to the structure is compact, simple system, convenient manufacture and maintenance, low cost.Most seals are wearing parts, should guarantee the interchangeability and realize the standardization, seriation.
The types of sealing materials and USES:
Sealing material should meet the requirements of sealing function.Because of the different medium to be sealed, as well as the equipment of different working conditions, request of sealing material have different adaptability.General to the requirement of sealing material is:
1) no softening under high temperature, decomposition, low temperature hardening, not brittle;
2) there is proper mechanical strength and hardness;
3) manufacture is convenient, cheap, made easy.
4) material density is good, not easy to leak medium;
5) good aging resistance, durable;
6) small friction coefficient, good abrasion resistance;
7) have combined with sealing surface softness;
8) good compressibility and resilience, permanent deformation small;
9) good corrosion resistance in acid, alkali, oil and other media can work for a long time, its size and the hardness change little, and not adhesive on the metal surface;
The most commonly used material is rubber sealing materials.In addition to the rubber, and the graphite sealing material is suitable for do, ptfe as well as a variety of sealant, etc.