National Oil seal

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National Oil seal

Oil Seal

We're professional to produce various of Rubber products with different material and have exported for 20 years.

we can provide you the all kinds of oil seal with high quality and reasonable price.

Our target is "All Customers first, Quality First, and Credit First"

This is the detail of our oil seal:

1.seal material:

NBR,HNBR,PTEE,FPM,MVQ,EPDM,PTFE,and so on

2.seal application:

trains,automobile,motocycles,trucks,buses,agricutural machinery and any equipments

3.seal certification:

GB/T19001-2000-ISO9001: 2000 standard

4.seal production control:

prouduced by priecise CNC machine

5.seal strong point:

we have our own mold center and engineer, can develop all kinds of high tech requireds.

Powerful mold quantity in stock.

Most popular type stytle including TC, TB, SC, SBC, TBG...

Q:What are the common materials of rubber seals for valves?: Different equipment and different use medium, etc., need different seals

Q:What are the material requirements of the valve sealing surface?: Table 29.2-2 characteristics of commonly used sealing methodsCategory material useLiquid polymer material, liquid sealant, anaerobic adhesive and hot-melt sealantFiber, plant fiber, cotton, linen, paper, cork gasket, soft packing, dust-proof seals, cloth rubber sealsAnimal hair fiber, felt, leather gasket, soft packing, molding filler, oil seal, dust-proof sealFiber, mineral fiber, asbestos gasket, soft packingArtificial fibres, organic synthetic fibres, glass fibres, carbon fibres, ceramic fibres, soft packing, cloth, rubber sealsElastomer, rubber, synthetic rubber, natural rubber gasket, molding filler, oil seal, soft packing, dust-proof sealing parts, fully enclosed sealsFluorine plastic, plastic nylon, polyethylene, phenolic plastic, chlorinated polyether, polyphenylene sulfide, oil seal, gasket, packing filler, soft hard packing, piston ring, mechanical seal and dustproof seals, fully enclosed seal

Q:What's the difference between the sealing ring shaft and the bore?: There is a very simple way, you see the seal specifications can know, generally speaking, such as diameter, x, diameter, X-ray diameter (16x23.3x3.2), the first to write the internal diameter is the axis, and conversely, the outer diameter x diameter, X-ray diameter is the axis!

Q:What's the difference between a seal and a sealing strip?: There are so many seals that you can use them where they need to be sealed. Powder focus can be used to make seals.

Q:500 degree high temperature rubber sealing strip: As the corrosion resistance, reducing Monai, grinding seal, insulation etc.. Silicone rubber - upper temperature limit (100~300) C

Q:What are the criteria for choosing the sealing ring type of hydraulic cylinders?: Basically refer to the following criteriaGB/T 10708.1-2000 reciprocating rubber sealing ring structure dimension series first parts: unidirectional sealing rubber (piston seal)GB/T 10708.2-2000 reciprocating rubber ring structure size series, second part, two-way sealing rubber ring (piston rod seal)GB/T 10708.3-2000 reciprocating rubber sealing ring structure size series third parts: rubber dust sealing ring standardOf course, engineering machinery selection of mechanical or other industry standards

Q:What's the difference between the oil seal and the seal?: Skeleton oil seal, TC import oil seal and domestic oil seal, the main difference has the following key places, materials, imported oil seal material and formula used to produce the product quality is better than the current domestic oil seal

Q:How to prevent the metal from sticking to the gasket?: It is better to use torque wrench when sealing gasket is pressed. For large bolts and high strength bolts, it is better to use hydraulic tightening devices. The tightening torque shall be calculated by calculation according to the given gasket. The size of the hydraulic pressure of the hydraulic tightening device shall also be determined by calculation.5. When installing the gasket, tighten the nut in sequence. However, the design value should not be screwed once. Generally should be recycled at least 2~3 times so that the gasket can be evenly distributed.6, the flammable and explosive medium pressure vessel and piping, replacing gasket should be used to avoid security tools, tool and flange bolts or collide, sparks, causing a fire or explosion accident.

Q:Why can't polyurethane seal be used as hydraulic oil with water glycol?: Water glycol lubrication performance is poor, high pressure, sealing components and cylinder block of friction, fever is very serious, so require sealing material to withstand high temperature, usually use fluorine rubber material. Polyurethane is not high temperature, more than 80 degrees when the deformation under pressure, the intensity is low, simply can not use.

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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