Tc NBR/Viton/EPDM Double Lip Rotary Shaft Oil Seal

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Last update:
2017-07-14 21:06
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189

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Company Profile

Xiamen Xlong Seal Co., Ltd.

By certification [File Integrity]

Contact：Mr. Williax Wang(Mr.)

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Telephone：

Area：Guangdong

Address：Guangdong

Website： http://morganseals.artstx.com/

Product details

Description

An oil seal normally consists of three basic components: The Sealing Element (the nitrile rubber part), the Metal Case, and the Spring. It is a widely used sealing component. The function of a seal is to prevent the leakage of medium along the moving parts. This is mainly achieved by the sealing element. The TC profile is a shaft seal composed of a single metal cage with a rubber coating, a primary sealing lip with integrated spring and an additional anti-pollution sealing lip.

Advantages
Very good static sealing
Very good thermal expansion compensation
Greater roughness is allowed in the housing
Reduced risk of corrosion
Sealing for low and high viscosity fluids
Modern primary sealing lip with low radial forces
Protection against undesirable air contaminantsApplications Shaft sealing
Motors
Pumps
Transmissions
Oil seal Cross Reference

Speed The table below indicates the relationships between the linear speed, the rotation speed and the recommended material.

The shaft seals with an additional protective lip are limited to a speed of 8 m/s.
Linear speed calculation:
s (m/s) = [Ø shaft (mm) x speed (rpm) x π] / 60,000Temperature The table below indicates the temperature limits, depending on the materials and fluids used.

Media		Maximum temperature, depending on the materials
Media		ACM	AEM	EPDM	FKM	HNBR	NBR	VMQ
Mineral oils	Oils for motors	+130°C	+130°C	-	+170°C	+130°C	+100°C	+150°C
	Oils for gearboxes	+120°C	+130°C	-	+150°C	+110°C	+80°C	+130°C
	Oils 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 fluids	HFA group - Emulsion with more than 80% water	-	-	-	-	+70°C	+70°C	+60°C
	HFB group - Opposite solution (water in oil)	-	-	-	-	+70°C	+70°C	+60°C
	HFC group - Polymer aqueous solution	-	-	+60°C	-	+70°C	+70°C	-
	HFD group - Water-free synthetic fluids	-	-	-	+150°C	-	-	-
Other fluids	EL + L heating oil	-	-	-	-	+100°C	+90°C	-
	Air	+150°C	+150°C	+150°C	+200°C	+130°C	+90°C	+200°C
	Water	-	-	+150°C	+100°C	+100°C	+90°C	-
	Water for washing	-	-	+130°C	+100°C	+100°C	+100°C	-
Temperature range	Min.	-25°C	-40°C	-45°C	-20°C	-30°C	-30°C	-60°C
Temperature range	Max.	+150°C	+150°C	+150°C	+200°C	+150°C	+100°C	+200°C

The sealing lip of the shaft seal endures a higher temperature due to shaft rotation, and the significant pressure and friction on the mechanical parts. Good lubrication is therefore necessary to allow for a better release of heat and thus limits the temperature rise in the parts subjected to friction.
By definition, the temperature at the edge of the seal is raised when the rotation speed (and thus the linear speed) as well as the shaft diameter increases. Fluids Mineral oils In general, this type of oil has few additives and is therefore perfectly suitable for all of the rubbers used for the rotary shaft seals. The following oils are suitable for rotating applications:

motor oils
gearbox oils
hypoid oils
ATF oils for automatic gearboxes
transmission oils

synthetic oils This type of oil is used to improve different characteristics such as the resistance to ageing, resistance to high temperatures, viscosity, etc. and has a good compatibility with the majority of rubbers used for the shaft seals. Tests may need to be performed beforehand to measure the degree of compatibility of this type of oil with the materials used. Among the synthetic oils are:

brake fluids
fluids for automatic gearboxes
fluids for suspensions
fluids for steering systems
fluids for hydraulic transmissions

Hypoid oils This type of oil contains special components such as EP additives. These enable lubrication and thus limit any seizing at the bearings, for example. When affected by heat, these additives have the tendency to lead to deposits on the sealing lip. That is why we recommend using shaft seals with a sealing lip comprising return pumping leads in order to limit the increase in temperature and above all, to reduce these potential carbon deposits.Greases Greases are generally applied to bearings etc. and require specific adaptation to provide favourable operating conditions for the shaft seal. To prevent the lip of the seal from sustaining more significant pressures than planned, we recommend positioning the lip seal on one side of the bearing in such a way so that the lip is not prematurely destroyed. We also recommend reducing the rotation speed by 50% when lubricated, to ensure that less heat escapes during friction.Aggressive fluids It is critical to choose the correct material to better resist different aggressive fluids (acids, solvents, chemical products, etc.). For applications in a rotating environment, we recommend using materials such as FKM rather than NBR. For operations that are dry or use very little lubrication, and where the rubbers do not resist certain aggressive fluids, we advise you to use our PTFE shaft seals.

SEAL DESIGN

Tolerance for the outside diameter of the seal (ØD) The table below indicates the pre-tightening for shaft seals on the housing diameter according to standard ISO 6194-1.

Bore diameter ØD1 (mm)	Tolerances on the outside diameter ØD of the ring			Roundness tolerance
Bore diameter ØD1 (mm)	Apparent metal cage	Rubber coating	Coating with grooves	Apparent metal cage	Rubber coating
ØD1 ≤ 50.0	+0.10 / +0.20	+0.15 / +0.30	+0.20 / +0.40	0.18	0.25
50.0 < ØD1 ≤ 80.0	+0.13 / +0.23	+0.20 / +0.35	+0.25 / +0.45	0.25	0.35
80.0 < ØD1 ≤ 120.0	+0.15 / +0.25	+0.20 / +0.35	+0.25 / +0.45	0.30	0.50
120.0 < ØD1 ≤ 180.0	+0.18 / +0.28	+0.25 / +0.45	+0.30 / +0.55	0.40	0.65
180.0 < ØD1 ≤ 300.0	+0.20 / +0.30	+0.25 / +0.45	+0.30 / +0.55	0.25% of ØD	0.80
300.0 < ØD1 ≤ 500.0	+0.23 / +0.35	+0.30 / +0.55	+0.35 / +0.65	0.25% of ØD	1.00
500.0 < ØD1 ≤ 630.0	+0.23 / +0.35	+0.35 / +0.65	+0.40 / +0.75	-	-
630.0 < ØD1 ≤ 800.0	+0.28 / +0.43	+0.40 / +0.75	+0.45 / +0.85	-	-

Tolerance for the inside diameter of the seal (Ød) Free and without constraint, the inside diameter of the sealing lip is always smaller than the diameter of the shaft. The pre-tightening or interference denotes the difference between these two values. Depending on the shaft diameter, the diameter of the sealing lip is generally considered to be less, between 0.8 and 3.5 mm.

SHAFT DESIGN

Shaft material
Suitable materials are:

ordinary C35 and C45 steels used in mechanical construction
1.4300 and 1.4112 stainless steels for sealing water
sprayed carbide coatings
graphite
malleable cast iron
materials with a CVD and PVD coating

Not appropriate:

chrome coatings solidified through non-uniform wear
plastic materials resulting from low thermal conductivity, which can lead to a disturbance in the transport of heat, an increase in temperature in friction areas with the shaft seal, as well as a potential softening

Shaft hardness
Shaft hardness will depend on the linear speed (in m/s) and the level of pollution.

Rotation speed	Hardness in HRC
s ≤ 4.0 m/s	45 HRC
4.0 < s ≤ 10.0 m/s	55 HRC
s > 10.0 m/s	60 HRC

Surface roughness
The recommendations below must be considered for the quality of the shaft surface area.
Standard conditions:

Ra = 0.2 to 0.8 µm and 0.1 for demanding applications
Rz = 1.0 to 4.0 µm
Rmax ≤ 6.3 µm

For pressurev > 0.1 MPa:

Ra = 0.2 to 0.4 µm and 0.1 for demanding applications
Rz = 1.0 to 3.0 µm
Rmax ≤ 6.3 µm

Shaft tolerance
The shaft must have a tolerance of h11, in line with standard ISO 286-2

Shaft diameter Ød1 (mm)	Tolerance h11 (mm)
Ød1 ≤ 3.0	-0.060 / 0
3.0 < Ød1 ≤ 6.0	-0.075 / 0
6.0 < Ød1 ≤ 10.0	-0.090 / 0
10.0 < Ød1 ≤ 18.0	-0.110 / 0
18.0 < Ød1 ≤ 30.0	-0.130 / 0
30.0 < Ød1 ≤ 50.0	-0.160 / 0
50.0 < Ød1 ≤ 80.0	-0.190 / 0
80.0 < Ød1 ≤ 120.0	-0.220 / 0
120.0 < Ød1 ≤ 180.0	-0.250 / 0
180.0 < Ød1 ≤ 250.0	-0.290 / 0
250.0 < Ød1 ≤ 315.0	-0.320 / 0
315.0 < Ød1 ≤ 400.0	-0.360 / 0
400.0 < Ød1 ≤ 500.0	-0.400 / 0

Chamfer and radius
You are strongly advised to install a chamfer on the shaft so as not to alter the primary sealing sealing lip of the shaft seal during assembly. Please refer to the table below.

Shaft diameter Ød1 (mm)	Chamfer diameter Ød3 (mm)	Radius R (mm)
Ød1 ≤ 10.0	Ød1 - 1.50	2.00
10.0 < Ød1 ≤ 20.0	Ød1 - 2.00	2.00
20.0 < Ød1 ≤ 30.0	Ød1 - 2.50	3.00
30.0 < Ød1 ≤ 40.0	Ød1 - 3.00	3.00
40.0 < Ød1 ≤ 50.0	Ød1 - 3.50	4.00
50.0 < Ød1 ≤ 70.0	Ød1 - 4.00	4.00
70.0 < Ød1 ≤ 95.0	Ød1 - 4.50	5.00
95.0 < Ød1 ≤ 130.0	Ød1 - 5.50	6.00
130.0 < Ød1 ≤ 240.0	Ød1 - 7.00	8.00
240.0 < Ød1 ≤ 500.0	Ød1 - 11.00	12.00

Oil Seal Size In mm

Morgan Seals has the biggest vulcanizing machine(4000T) and different kinds of seal moulds. So for the non standard oil seals, please do not hesitate to contact with us. The following is the the picture of our production line and warehouse:

Our services:
Guangzhou Morgan Seals Co., Ltd the expert in sealing solution field who combines the rich seals research and production experience of her parent firm with the advanced technology and administration of Morgan, Worcester. 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.