Piston Seal Set P20

DESCRIPTION
P20 Piston Seal Set is duoble acting seal for medium duty application and housing according to ISO 7425-1. It is consisting of PTFE profile ring and an O-ring as energising element.

Features of this seal are very high static and dynamic sealing effect, high resistance against pressure, extrusion, abrasiion and low friction without the apperiance of stick-slip.

APPLICATION
Industrial vehicles
Agricultural machinery
Cranes
Presses
Handling equipment
Marine hydraulics
Injection moulding machines
Control and regulation equipment

Standard material
Material Code SN203 SN209 SF207
O-ring NBR 70 ShA N7020 N7020  –
O-ring FKM 70 F9172
PTFE Bronze T1004 T1004
PTFE glass,MoS2 T1021
Applications Selection
Table
PTFE Bronze-NBR
Set code SN203
PTFE Glass-NBR
Set code SN209
PTFE Bronze-FKM
Set code SF207
Hydraulic oils (-10..+200˚C) – – – – + +
Hydraulic oils (-30..+100˚C) + + + – – –
Water Hydraulics (-30..+100˚C) – – + + – –

Pressure, Speed
Working pressure Max 40 Mpa
Running speed, v Up to 5 m/s
Medium, Working temperature
Material Code SN203 SN209 SF207
Hydraulic oils:HL, HLP -30.. +100 ˚C -30.. +100 ˚C -10.. +200 ˚C
HFA, HFB fluids +5..+60 oC
HFC fluids -30..+60 oC
HFD fluids -10.. +200 ˚C
Water +5..+100oC
Mineral greases -30.. +100 ˚C -30.. +100 ˚C -10.. +200 ˚C
Max. permissible gap dimension, emax
Profile size Max operating pressure
L S 16 MPa 26 MPa 32 MPa 40 MPa
3,2 3,75 0,40 0,35
4,2 5,50 0,50 0,40 0,30
6,3 7,55 0,55 0,45 0,35 0,30
8,1 10,50 0,60 0,50 0,40 0,30
Surface quality*
Surface roughness Ra Rmax
Sliding surfaces 0.05 .. 0,3μm ≤ 2,5 μm
Groove base ≤ 1,6 μm ≤ 6,3 μm
Groove flanks ≤ 3,0 μm ≤ 15 μm
Chamfer ≤ 4,0 μm ≤ 16 μm

*Contact area Mr = 50% to 90% at cutting depth c=Rz/2 and reference line Cref=0%

ØD
Ød
H
L
S