DPS TPE (DOUBLE ACTION PISTONSEAL)

product

DPS TPE is a four-part, double-acting piston seal for heavy demands, consisting of a TPE Profflring, a biasing member made of NBR, as well as two support rings of POM.

PRODUCT ADVANTAGES

  • Superior performance in high and variable pressure
  • Very good sealing performance at Shock Pressures
  • Simple groove design
  • Long service life
  • High resistance to abrasion
  • Ultimate resistance in water-based fluids

APPLICATION:

Heavy duty cylinders , excavators , cranes , marine hydraulics and loading platforms.

INSTALLATION:

Easily assembled into one-piece piston because the back-up rings are been produced in split forms. It is very important that the assembly tools must be of soft material and have no sharp edges. Before installation the sealing element must be oiled with system oil.

NOTES: Please enter the values for the permissible sealing gap of DPS TPE heavy hydraulic piston seal is given in the table below

PERMISSABLE SEALING GAP Smax (mm)
Pressure (Bar) 400 Bar
≤350 mm 0.45
>350 mm 0.25

Note: The largest sealing gap value occurring on the non-pressurized side of the seal does have a vital importance for the function of the seal and in this respect it is quite important to use the S value lower than the above indicated numbers. 

MATERIAL: TPE 5501 / NBR 80 SH / POM

 

OPERATING CONDITIONS 
MEDIA Mineral oils(DIN 51524)  HFA and HFB HFC
TEMPERATURE -30°C +105°C +5°C +60°C -30°C +60°C
PRESSURE ≤400 Bar ≤400 Bar ≤400 Bar
SPEED ≤0.8 m/sn ≤0.8 m/sn ≤0.8 m/sn

Note: The above data are maximum values and cannot be used at the same time.

SURFACE ROUGHNESS Ra Rmax
Sliding Surface ØD ≤0.4 μm ≤4.0 μm
Groove Base Ød ≤1.6 μm ≤6.3 μm
Groove Flanks B ≤3.2 μm ≤16 μm

Note: It is recommended to have 50% to 90% of the working surface material contact area value.

 

 

 

 

 

 

  

 

 

 

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# Vota code Name Application Material Pressure
(bar)
Temperature °C Sliding Speed (m/s)
zuiger-afdichting/dps-tpe DPS TPE DPS TPE (DOUBLE ACTION PISTONSEAL) PISTON TPE-NBR-POM 400 -30°C +100°C 0.8
PTFE/BRONZE - NBR - POM 600 -30°C +105°C 1.5
PTFE/POM/NBR 600 -30°C +105 °C 1.5
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