China Custom NBR FKM PU Large Diameter Rubber Seal Ring

Description

What is rubber seal ring
Rubber seal is a common form of a device for preventing leakage of fluid from one part of a container to another, whether dynamic or static. It is also called as rubber ring, rubber sealing. The catagories of rubber seals includes hydraulic seals(piston ring, rod ring, wipers, guide ring, buffer ring...), rotary shaft seal(oil seal, coolant/water seal, V-seals...), o rings and so on. Care is needed in design, since poor tolerances can cause extrusion of the seal under pressure.

The seals conform to DIN 3760. Rubber types available are Nitrile, Viton ®, Silicone and EPDM.

The seals are used in a full range of equipment in the following industries:
• Automotive.
• Manufacturing.
• Off-highway.
• Oil refineries.
• Power transmission.

Example applications include:
• Industrial Pumps.
• Electric Motors.
• Compressors & Vacuum Pumps.
• Engine Seals.
• Agricultural Machinery Seals.
• Domestic Appliances
Materials
Morgan rubber seal ring Material Includes Nitrile rubber, fluorine rubber, ethylene propylene rubber, neoprene, chloroprene rubber, silicone rubber and so on.
Lip Material
It is very important to take into account the environment in which the seal will operate when you are selecting the sealing element material. The most important factors are temperature, medium being sealed, pressure, and shaft speed.

MediaMaximum temperature, depending on the materialsACMAEMEPDMFKMHNBRNBRVMQMineral oilsOils for motors+130°C+130°C-+170°C+130°C+100°C+150°COils for gearboxes+120°C+130°C-+150°C+110°C+80°C+130°COils for hypoid gears+120°C+130°C-+150°C+110°C+80°C-ATF oils+120°C+130°C-+170°C+130°C+100°C-Hydraulic oils+120°C+130°C +150°C+130°C+90°C-Greases-+130°C--+100°C+90°C-Fire-resistant
fluidsHFA group - Emulsion with more than 80% water----+70°C+70°C+60°CHFB group - Opposite solution (water in oil)----+70°C+70°C+60°CHFC group - Polymer aqueous solution--+60°C-+70°C+70°C-HFD group - Water-free synthetic fluids---+150°C---Other fluidsEL + L heating oil----+100°C+90°C-Air+150°C+150°C+150°C+200°C+130°C+90°C+200°CWater--+150°C+100°C+100°C+90°C-Water for washing--+130°C+100°C+100°C+100°C-Temperature rangeMin.-25°C-40°C-45°C-20°C-30°C-30°C-60°CMax.+150°C+150°C+150°C+200°C+150°C+100°C+200°C

Shaft MaterialSeals perform best on medium carbon steel or stainless steel shaft. Heat treatment or nitriding is especially recommended. To seal water at low surface velocities, stainless steel is more suitable.
The minimum hardness on the area where the sealing lip contacts the shaft should be 45 HRC. Where lubrications is doubtful, abrasive matter is present, or shaft speed is greater than 4m/sec, 55 HRC is preferred.
The shaft must be machined to the surface Roughness of Rt=1 to 4 micrometers (Ra=0.2 to 0.8 micrometers). In the areas of the contact surface, any rifling marks are not permitted.Shaft Tolerance

Nominal Shaft DiameterToleranceup to 4.000+/- 0.003over 4.000 to 6.000+/- 0.004over 6.000 to 10.000+/- 0.005over 10.000+/- 0.006

Shaft Material and Hardness GeneralCarbon steel(Heat treatment or nitriding is especially recommended)45 HRC min.For sealing water with low surface velocityStainless steel55 HRC min.

Configuration of the BoreThe leading corner of the bore should be chamfered and free of burrs. The inside corner of the bore should have a maximum radius of 0.047". The tolerances for the bore are shown below.

Bore Tolerance in inches up to 3.000+/- 0.0013.001 to 6.000+/- 0.00156.001 to 10.000+/- 0.00210.001 to 20.000+/- 0.002/- 0.00420.001 to 40.000+/- 0.002/- 0.00640.001 to 60.000+/- 0.002/- 0.010

Bore MaterialSteel and cast iron provide a good surface for both rubber O.D. and metal O.D. seals. For soft alloy (aluminum) bore, seals with rubber O.D. provide better sealing capacity than metal O.D.
The table below shows the recommended maximum bore roughness.

Bore I.D. RoughnessMaximum Roughnessmetal O.D.10 microinches Ra
2.50 microinches RaRubber covered O.D.150 microinches Ra
3.75 microinches Ra

Cases:

Morgan seals is the supplier of many famous customer, such as the Siemens Primetals, Baosteels .... The largest seal ring we produced is the PU seal for Three Gorges Hydroelectric Power Station water-turbine generator(OD is 13000mm).
Guangzhou Morgan Seals Co., Ltd. has the biggest vulcanizing machine(4000T) and different kinds of seal moulds. So for the non-standard o ring, oil seals, hydraulic seals, please do not hesitate to contact with us. The following is the the picture Morgan Production Line and Warehouse
about Morgan
Established by Guangzhou Mechanical Engineering Research Institute Co., Ltd. (51% share, hereinafter to be referred as GMERI) and Morgan Construction Co., Worcester, MA, U. S. A. (49%, hereinafter to be referred as Morgan, Worcester) in 2006, Guangzhou Morgan seals Company Ltd. Is a professional manufacturer for sealing products. Combined the rich seals research and production experience of GMERI with the advanced technology and administration of Morgan, Worcester, the joint venture is renowned for its modern production lines, persisting research & development, strict quality control, quality sales and after-sales service. Now she has gained a good name from her customer all over the world, such as Siemens Primetals, Baosteel, SMS siemag and so on.
Morgan Seals Research and Development ability is based on her parent firm who has won awards as scientific research achievements for more than 1000 projects and over 200 of them won scientific and technological progress prizes of municipal, provincial, ministerial and national levels. At the same time, it also has one National Certified Laboratory, one National Engineering Research Centers and three Industry Level Inspection Centers.