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Hydraulic seals
Update:2018-07-25
Common sealing rings are: V-ring, U-ring, O-ring, square ring, Y-ring, piston YX ring, YX piston backup ring, rod YX ring, rod YX backup ring, dust ring, etc. You can choose DSH Seals in domestic.
2. What kinds of rubber seals are commonly used for hydraulic supports?
PTFE backup ring, tube material, bar material, POM guide ring, piston guide ring, backup ring, rod seal NL ring, drum ring, U-ring, Y-ring, O-ring and so on that made of imported rubber (NBR, FKM), PU material. The products are widely used in the hydraulic system of various domestically produced, imported coal mines using hydraulic supports, single hydraulic props, emulsion pumps, mining machinery etc.
3. How to choose hydraulic sealing ring?
Direction of motion - first determines the direction of motion of the seal, such as reciprocating, rotating, spiraling or fixed.
Sealing - for example, determining the active point is the inner diameter of the rod seal or the active point is the piston seal at the outer diameter.
Temperature class - Determine the material used by reviewing the original machine instructions or evaluating the operating temperature according to the actual working environment.
4. How is the hydraulic seal classified?
O-ring
Lip seal
V-ring: V-ring needs to be used with the support ring and pressure ring. The sealing performance of the V-ring is better. The number of seals used can be determined according to the working pressure.
YX type seal: YX type seal is the ratio of the section width to the height ratio greater than two, and based on the requirements for stability of use, the working lip of the YX type seal is not a working lip.
Compact seal
Glyd ring: The Glyd Ring is made up of an O-ring and a filled PTFE seal. The Glyd Ring can be divided into rod glyd ring and piston glyd ring.
Step seal: The step seal structure is similar to the Glyd ring, and is also composed of an O-ring and a filled PTFE seal.
5. The difference between pneumatic seals and hydraulic seals
Different working environment
Pneumatic sealing ring at room temperature, air, pressure about 4~8 kg/cm2
Hydraulic seal high temperature, hydraulic oil, pressure about 50~400 kg/ cm2
6. What is the material of the hydraulic cylinder seal?
Customize different sealing materials according to working conditions
7. How to distinguish between mechanical seals and hydraulic seals?
Mechanical seals generally have no pressure requirements. They are metal hard seals. They are sealed by several seals rotary. Hydraulic seals have pressure requirements. The joint surface is required to have a certain degree of smoothness. The seals are mostly rubber. Part of the closure effect.
8. What sealing ring used for the piston seal in the low pressure hydraulic cylinder is better? (pressure is about 3MPa)
O-ring can be used, if you run fast, use O-ring of FKM
