(pack) Piston packing K17 NBR/PTFE ID 150mm-500mm (choose dimensions)

Description

Welcome to our oil seal store. Huge amount of different dimensions and materials are on stock!! Don´t hasitate to contact us. We also have o-ring store, bearing store,chain store,
hydraulic and pneumatic seals store, belt store, etc - we can send together.
Most of oil seals are on stock, so we are usually shipping within 2 bussiness days.
Longer handling time 10-20 days occures just on sold out items.
We can also use UPS express shipping. Shipping rates are: UPS to USA
30USD,
UPS to Europe, U.K, Germany, France
20USD,
UPS to N.a S.America, Canada, Mexico, Brazil, Asia, China, Japan, Australia
50USD
K17 is a two piece double acting piston seal which consists of one special mixture PTFE profile ring and an o-ring as energizing element.
PRODUCT ADVANTAGES
• Low friction , free of stick-slip
• Simple groove design and low axial housing heights
• Long service life
• High sliding speed
• Wide range of temperature and chemicals depending on the o-ring material
• Minimum static and dynamic friction coefficient for a minimum energy loss and operating temperature
• Wide range of dimensions
APPLICATION
Injection moulding machines , fork-lift trucks , loading platforms , cranes , agricultural machinery and valves for hydraulic and pneumatic systems.
MATERIAL
CODE
NBR
70 SHORE A
NB
7001
PTFE
PT
6003
OPERATING CONDITIONS
MEDIA
Mineral oils(DIN 51524)
HFA ve HFB
HFC
TEMPERATURE
-30°C +105°C
+5°C +60°C
-30°C +60°C
PRESSURE
≤400 Bar
≤400 Bar
≤400 Bar
SPEED
≤5.0 m/sn
≤5.0 m/sn
≤5.0 m/sn
Note: The above data are maximum values and cannot be used at the same time.
SURFACE ROUGHNESS
Ra
Rmax
Sliding Surface  ØD
≤0.2 μm
≤2.0 μm
Groove Base Ød
≤1.6 μm
≤6.3 μm
Groove Flanks   B
≤3.2 μm
≤15 μm
Note: It is recommended to have 50% to 90% of the working surface material contact area value.
INSTALLATION
We recommend using special assembly tool (See section; Hydraulic Sealing Elements General Installation Information) and to have open groove design for dimensions that are smaller than Ø 40 mm. 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
It is recommended to use with minimum two piston guide rings in long stroke cylinders , minimum one guide ring in short stroke and under low radial loads. For special applications that require high temperatures or resistance to chemicals , piston seal is being manufactured with special mixture PTFE and FKM material. The permissible sealing gap values of K17 piston seal is given in the below table.
PERMISSIBLE SEALING GAP
B (mm)
Smax (mm)
x
150 Bar
250 Bar
400 Bar
2.2
0.25
0.20
0.15
3.2
0.4
0.25
0.15
4.2
0.4
0.25
0.20
6.3
0.5
0.30
0.20
8.1
0.6
0.35
0.25
9.5
0.7
0.50
0.30
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.