Code Description D(H10) d(h9) B(-0/+0.2) r n

K48 3D

K48 is a four piece double acting heavy duty piston seal which consists of one TPE profile ring , one elastomeric nitrile rubber to preload sealing element and two thermoplastic back-up rings.

PRODUCT ADVANTAGES
•Simple groove design
•Superior performance in high and variable pressure
•Long service life
•Very good sealing performance at shock pressures
•High resistance to abrasion
•Ultimate resistance in water based fluids.

APPLICATION
Mining industryHeavy duty applications

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.

MATERIAL   CODE
NBR 80 SHORE A NB8001
TPE   TP5501
POM   PM9901

OPERATING CONDITIONS

MEDIA

Mineral Oils
(DIN 51524)

HFA and
HFB

TEMPERATURE

-30°C
+105°C

+5°C
+60°C

PRESSURE

≤700 bar

≤700 bar

SPEED

≤0.3 m/s

≤0.3 m/s

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

SURFACE ROUGHNESS

Ra

Rmax

Sliding Surface ØD

≤0.4 μm

≤3.2 μm

Groove Base Ød

≤1.6 μm

≤10 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.

 PERMISSIBLE SEALING GAP

PRESSURE (bar)

S max (mm)

P≤350

0.45

350 < P ≤ 700

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.

 

NOTES
It is recommended to choose suitable material and quantity for guiding element regarding the purpose  of application.

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