Mechanical seal is a shaft sealing device that relies on one or several pairs of end faces that slide relative to the shaft perpendicular to the shaft under the action of fluid pressure and the elastic force (or magnetic force) of the compensation mechanism to keep it fit and to be equipped with an auxiliary seal to achieve leakage prevention. For more details mechanical seals supplier

Commonly used materials for mechanical seals:

1. Sea water; normal temperature; (dynamic) tungsten carbide, 1CR13 surfacing cobalt chromium tungsten, cast iron; (static) resin graphite, tungsten carbide, cermet; superheated water 100 degrees; (dynamic) tungsten carbide, 1CR13 cobalt surfacing Chromium tungsten, cast iron; (static) impregnated resin graphite, tungsten carbide, cermet. Purified water; normal temperature; (dynamic) 9CR18, 1CR13 surfacing cobalt chromium tungsten, cast iron; (static) impregnated resin graphite, bronze, phenolic plastic, river water (containing sediment); normal temperature; (dynamic) tungsten carbide, (static) carbide Tungsten.

2. Gasoline, lubricating oil, liquid hydrocarbon; normal temperature; (dynamic) tungsten carbide, 1CR13 surfacing cobalt chromium tungsten, cast iron; (static) resin or tin antimony alloy graphite, phenolic plastic. Gasoline, lubricating oil, liquid hydrocarbon; 100 degrees; (dynamic) tungsten carbide, 1CR13 surfacing cobalt chromium tungsten; (static) immersion bronze or resin graphite. Gasoline, lubricating oil, liquid hydrocarbon; containing particles; (dynamic) tungsten carbide; (static) tungsten carbide.

The sealing material should meet the requirements of the sealing function. Because the medium to be sealed is different, and the working conditions of the equipment are different, different adaptability of the sealing material is required. The requirements for sealing materials are generally:

1. It does not soften or decompose at high temperature, does not harden at low temperature, does not brittle, and has good corrosion resistance. It can work for a long time in acid, alkali, oil and other media, and its volume and hardness change little, and it does not adhere to metal On the surface, the friction coefficient is small and the wear resistance is good.

2. It has the flexibility to combine with the sealing surface, good aging resistance, durability, convenient processing and manufacturing, low price, easy to obtain materials, rubber is a commonly used sealing material. In addition to rubber, graphite, polytetrafluoroethylene, and various sealants are also suitable for sealing materials.

3. The material has good compactness, is not easy to leak the medium, has appropriate mechanical strength and hardness, good compressibility and resilience, and small deformation.