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Q:What are the material requirements of the valve sealing surface?: Sealing materials should meet the requirements of sealing function. Due to the different sealing medium and different working conditions of the equipment, sealing materials are required to have different applicability. The sealing material requirements are: the material density, not easy leakage; the appropriate mechanical strength and hardness; and good elasticity, compression, permanent deformation is small; the high temperature softening, decomposition, low temperature, non hardening embrittlement; the good corrosion resistance in the long-term work of acid and alkali, oil medium, the volume of a small change in hardness, and adhesion to the metal surface; the low friction coefficient, good wear resistance; with the sealing surface with soft and full; the good anti-aging, durable; to facilitate manufacturing, price cheap, easy. Obviously, it is impossible for any material to meet the above requirements completely, but the material with excellent sealing performance can meet most of the above requirements.Rubber is the most commonly used sealing material, in addition to rubber, suitable for sealing materials as well as graphite band, PTFE and various sealants, etc. table 29.2-4 lists the classification and use of sealing materials.

Q:How heavy is the mechanical seal of the centrifugal pump?: Centrifugal pumps use the impeller to rotate and cause centrifugal motion of the water to work. The pump before starting to pump shell and the water pipe filled with water, and then start the motor, the pump shaft to drive the impeller and water do high-speed rotation, centrifugal water movement, was thrown to the outer edge of the impeller, the pressure water pipeline flow through the volute pump into the pump shell.

Q:What's the difference between the sealing ring shaft and the bore?: For hydraulic cylinders, the fixed shaft is used. If it moves with the piston rod, it is the hole. Or, if it is installed on the piston, that is the hole, mainly by mouth to seal the outer lip. On the contrary, if it is sealed by the inner lip, it is used for shafts.

Q:Excuse me, what's the material for the general piston ring?: Have experience in understanding, there are two kinds of material, one is pure PTFE, also known as Teflon, a PTFE graphite or PTFE carbon fiber material, PTFE piston ring and guide ring, the throttle ring is a new type of sealing material instead of asbestos packing, steel ring, wear-resistant, high temperature, characteristics long service life, convenient maintenance, can protect the piston body and the cylinder wall is smooth, not easy to wear.

Q:How can the tapered roller bearings be sealed?: The seal can prevent the loss of lubricant and dirt into the SKF tapered roller bearings, thereby maintaining SKF lubrication of tapered roller bearings and the clean degree and is conducive to the achievement of long life, but also to consider the effectiveness, cost, simplified sealing sealing structure and effective period, according to the SKF tapered roller bearing environmental conditions and requirements of life to be a reasonable choice

Q:The function and principle of cooling water for mechanical seal of water pump?: Mechanical seals, in order to protect the sealing surfaces of the moving and stationary rings, require cooling to cool them,There are two forms of cooling, a pump fluid leaking into the mechanical seal, which is relatively dead water,

Q:How long is the shelf life of the cylinder seals?: And you use the environment, sealing material is greatly related. Yes, only 100 times,. Yes, 1 million times.

Q:The material of the seal must be compatible with the medium in contact with it. Why? What is compatibility? Thank you: Therefore, the compatibility between them requires simple understanding that they do not react to each other in order to maintain their respective characteristics.

Q:What is the operation of the seal company sulfur chemical?What is the specific work? Is there any danger and harm?: Then there is vulcanizing machine is generally heating, pressure equipment, vulcanizing board temperature is higher, easy to scald. So be careful in operation

Q:About hydraulic cylinder sealing ring What is the model of the general oil cylinder seal ring and what is its selection principle?: (3) the sealing ring has the advantages of strong corrosion resistance, aging resistance, long service life, good wear resistance, and automatic compensation to a certain extent after wearing.(4) the structure is simple, the use and maintenance are convenient, and the sealing ring has longer service life.

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