TURCON R STEPSEAL R2K
-Single Acting-
-Rubber Energised Plastic Faced Seal-
-
Material-
-Turcon R and Zurcon R-
Turcon R Stepseal R
2K
Turcon R Stepseal R 2K*
Description
Rod seals must exhibit no dynamic leakage to the atmosphere side under all operating conditions and must be statically completely leak tight when the machine is at a standstill.Furthermore,they should achieve a high degree of mechanical efficiency through low friction and be easy to install in small grooves.Costs and service life must meet the high expectations of the operator.The rod seal Turcon R Stepseal R 2K comes closest to satisfying these ideal demands.Since the first Stepseal R was patented and introduced to the market in 1972,Busak+Shamban has maintained the series as technically outstanding seal elements through continuous innovative further development of the design and of the Turcon R and Zurcon R materials.Turcon R Stepseal R 2K continues the tradition for improvement.
With the introduction of Stepseal R it was possible for the first time to arrange several seals,one behi
nd the other,thus allowing statically and dynamically tight
double-acting tandem seal configurations to be created,without any disturbing build-up of intermediate pressure.The single-acting seal element is made of high-grade Turcon R or Zurcon R materials with outstanding sliding and wear resistance properties.It is installed according to ISO 7425/2and Busak+Shamban standard grooves,using an O-Ring as energizing element.
Figure 15Turcon R Stepseal R 2K
*Patented and patent pending geometry
Turcon R Stepseal R
国外雾霾
2K
Method of operation
The sealing performance of Stepseal R 2K (Figure 15)results from the hydrodynamic properties of the seal.The classic Stepseal R seal edge creates a steep contact pressure gradient on the high pressure side and a shallow contact pressure gradient on the low pressure side.The controlled pressure gradients minimizes fluid adherence to the piston rod during the extending stroke,and enables residual fluid film on the rod to be returned into the system on the return stroke.This is united with new patented and patent applied design features which further improve the performance of Step
barbie girls
seal R 2K under severe service conditions.
乌鞘岭隧道The O-Ring relief chamfer reduces pressure loading on the seal,whereby contact with the rod is optimised and sealing performance is improved at high service pressures.The special high-lift rear chamfer combines a smooth downstream sealing face with the ability to meet large radial clearances and hardware tolerances.Stepseal R 2K gives high static and dynamic sealing performance,and the build-up of intermediate pressure often found with tandem seal configurations (see Figure 16)is efficiently suppressed. P R E S S U R E
Stepseal R K
•
Stepseal R 2K
F R I C T I O N F O R C E
C Y C L E S
Stepseal R 2K
Stepseal R K
•
•
Advantages
-High static and dynamic sealing effect
-High extrusion resistance,meets high hardware clearances
-Low friction,high efficiency
-Stick-slip free starting,no sticking
-High abrasion resistance,high operational reliability -Wide range of application temperatures and high resistance to chemicals,depending on the choice of O-Ring material
-Simple installation without seal edge deformation -Available for all diameters up to 2.600mm rod dia.Technical data
Operating pressure:up to 80MPa Speed:up to 15m/s with reciprocating
水力压裂
movements,frequency up to 5Hz
T emperature:-45°C to +200°C
(depending on O-Ring material)
Media:Mineral oil-based hydraulic fluids,
flame retardant hydraulic fluids,environmentally safe hydraulic fluids (bio-oils),water and others,depending on the O-Ring material (see T able X)
Clearance:The maximum permissible radial
clearance S max is shown in T able XI,as a function of the operating pressure and functional diameter.Important Note:
The above data are maximum values and cannot be used at the he maximum operating speed depends on material type,pressure,temperature and gap value.
T emperature range also dependent on medium.
Turcon R Stepseal R
2K
Materials
The following material combination has proven effective for applications with hydraulic oils containing zinc:Turcon R Stepseal R 2K:Turcon R T46O-Ring:NBR,70Shore A N FKM,70Shore A V
T46N/T46V
For specific applications,other material combinations as listed in T able X,may also be used.Series
Different cross-section sizes are recommended as a function of the seal diameters.These are the criteria for these recommendations.
T able XI,shows the relationship between the series number according to the seal diameter range and the different application class sizes.These application classes are:Standard application:
General applications in which no exceptional operating conditions exist.
Light application:
Applications with demands for reduced friction or for smaller grooves.
Heavy-duty application:For exceptional operating
loads such as high pressures,pressure peaks,etc.Table IX
Available range
Series No.Rod Diameter d N f8/h9RSK00 2.0-130.0RSK10 6.0-250.0RSK2010.0-450.0RSK3012.0-650.0RSK4038.0-650.0RSK80200.0-999.9RSK50256.0-999.9RSK5X 1000.0-1200.0RSK60650.0-999.9RSK6X
1000.0-2600.0
For the recommended range see T able XI.Application Examples S Mobile hydraulic S Standard cylinders S Machine tools
S
Injection moulding machines
S Presses
S Automobile industry S Hydraulic hammers S Servo hydraulics
Redundant Sealing System
In many applications,secondary seal systems are demanded.Figure 16shows such a tandem configuration with the Stepseal R 2K.
Figure 16Turcon R Stepseal R 2K and Zurcon R Rimseal
in tandem configuration In this configuration it must be noted that a sufficiently large space is formed between the seals to take the hydraulic fluid,as shown in the figure.
Depending on the application and the operating conditions,the combination of different materials offers a further improvement in the sealing efficiency and the service life of the system, e.g.in hydraulic cylinders subject to high loads and under rough operating conditions,the primary seal should be made of Turcon R and the secondary seal of Zurcon R .
Stepseal R 2K elements should always be used in combination with a double-acting scraper to provide an optimum sealing effect.
The scraper Turcon R Excluder R 2,Turcon R Excluder R 5,Zurcon R Excluder R 500,DA17,DA22and DA24are well suited to such applications.For further details,please refer to our ”Scrapers”catalogue.
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