Slipper ptfe Composite seals

Steplock®

Steplock® Composite Slipper seals are interchangeable with NPS series in double-acting applications. The special Steplock® split design allows easy assembly with no equipment, keeps the Slipper in place, and ensures a perfect sealing. No resizing required.

Slipper StepLock - StepLock icon
StepLock
Steplock® image
Housing
class
A
cylinder bore range

groove diameter

groove width
R S
min
G*
   suggested available hydraulics pneumatics       max. radial gap
  H8 h9 H12     Bar 50 100 200 400
N2 35-39,9 35-250 A- 7,5 A- 8,0 3,2 0,6 2,2 0,8 0,6 0,5 0,3
N3 40-79,9 35-450 A- 11 A- 11,5 4,2 0,8 2,6 1,2 0,7 0,5 0,3
N4 80-132,9 40-650 A- 15,5 A- 16,5 6,3 1 5,6 1,4 0,7 0,6 0,4
N5 133-400 130-1200 A- 21 A- 22,3 8,1 1,5 8,2 1,5 0,8 0,6 0,4
G*=G1+G2+G3 G1 = Max. initial clearence
G2 = Clearence by elastic deformation of the components under pressure
G3 = Clearence due to the forseen wear of the guiding elements 

 

Coding example
profile code StepLock
bore 100
housing class N4
materials: Neuflon 031 O-Ring NBR
StepLock 100 N4 N-031 NBR
assembly

STEPLOCK®  ASSEMBLING

RESIZING NON REQUIRED

finishes
SURFACE FINISH ACCORDING WITH FLUID
application max Ra µm
dynamic surface
max Ra µm
static surface
CRYOGENICS 0,1 0,2
FREON
HELIUM
HYDROGEN
0,2 0,3
AIR
NITROGEN
ARGON
METHANE
FUELS
0.2 0.4
WATER
OIL
0.3 - 04 0.6
ROTARY SEALS
 Shaft surface

Ra 0.2 - 0.3 micron max.
Rz 1.0 - 2.5 micron max.
R max. < 4 micron
Shaft hardness

55 HRC min. for pressure up to 5 bar
60 HRC min. for pressure > di 5 bar
60 HRC for speed > 4m/sec
Surface treating deep

0.3 mm min.
materials

Click compound's code to download the .PDF data sheet. Registration required.

HD Slippers
code
Composition Color Approvals ΔT °C Description
N-020 Virgin PTFE white FDA
NORSOK
-268 +260 All pourpose, low friction coefficient, extrusion withstanding.
N-009 Ptfe-oxides blue FDA -268 +260 All pourpose on soft surfaces
N-031 Ptfe-bronze green-blue   -268 +260 High wear resistance, hidraulic seals
N-032 Ptfe-carbon black   -268 +260 High wear resistance, pneumatic and hydraulic seals
N-059 Ptfe-carbographite black   -268 +260 High wear resistance, hydraulic and pneumatic seals, hard surfaces
N-197 Ptfe-carbographite black NORSOK -268 +260 High wear resistance, hydraulic and pneumatic seals
N-043 Ptfe-graphite black FDA -268 +260 High wear resistance, low friction coefficient.
N-103 Ptfe-carbon fibre black FDA -268 +260 High wear resistance, low friction coefficient, hard surfaces.
N-077 Ptfe-glass fibre-MoS2 gray   -268 +260 Of general use, in lubricated applications, rotary seals
N-060 Ptfe-glass fibre blue FDA -268 +260 All pourpose on hard surfaces
N-067 Ptfe-glass fibre white FDA
NORSOK
-268 +260 High wear and creep resistance
N-102 Ptfe-Liquid crystal polymer beige FDA - EU
-268 +260 Food & Pharma, soft surfaces
N-088 Ptfe-poliimmide yellow   -268 +260 High wear resistance. Soft surfaces
N-074 PEHMW white FDA -140 +80 High wear and extrusion resistance
P95-A252 Polyurethane blue FDA -50 +105 Extrusion and wear withstanding, low friction coefficient
P95-VI251 Polyurethane violet  FDA  -30 +115 CIP (clean in place) fluids compatible
P95-R198 Polyurethane red   -30 +125 Extrusion and wear withstanding, low friction coefficient, high temperatures
P95-AR255 Polyurethane orange   -30 +135 Extrusion and wear withstanding, low friction coefficient, higher temperatures
P95-G253 Polyurethane MoS gray   -30 +105 Extrusion and wear withstanding, lower friction coefficient

 


 

 

CHOOSING Neuflon-ptfe compound ACCORDING WITH FLUID AND SURFACE
  SURFACES
  Steel HEC>=30-45
Temp. Mart. Inox Steel
Cast Iron HRB<=200
Steel HRC>=45
Cast Iron HRB>200
Galvanic or chemical surfacing HV>=700
Chromium Bronze
Bronze
Brass
Treated Aluminium Aust. Inox Steel
Glass
FLUIDS NEUFLON-ptfe compounds (standard in bold)
Hydraulic oil
Transmission oil
Fire resistant syntetic hydraulic oil
N-031
N-032 N-060 N-077 P95-A112
N-031
N-032 N-060 N-077 P95-A112
N-009
N-043 N-032 P95-A112
N-032
N-074 P95-A112
N-009
N-032 N-074 P95-A112
Water and oil/water emulsions N-032
N-060 N-077 N-074
N-032
N-060 N-077 N-074
N-009
N-043 N-074
N-032
N-074
N-009
N-032 N-074
Drugs and food N-009
N-102 N-020 N-043 N-060 N-074 N-088 P95-B113
N-009
N-074 P95-B113
N-102
N-009 P95-B113
N-009
N-074 P95-B113
N-009
N-074 P95-B113
Air N-032
N-031 N-043 N-074 P95-A112
N-032
N-043 P95-A112
N-032
N-009 N-043 N-074 P95-A112
N-032
N-074 P95-A112
N-032
N-009 N-043 N-074 P95-A112
Steam N-032
N-043
N-032 N-009
N-032 N-043
  N-032
N-009 N-043
Acids and Bases N-032
N-059 N-074
N-032
N-043 N-074
    N-009
N-032 N-043 N-074

 


 

 

ELASTOMER ACCORDING WITH FLUID

FLUID ELASTOMER
HYDRAULIC OIL - TRANSMISSION OIL NBR
FIRE RESISTANT SYNTETIC HYDRAULIC OIL EPDM
WATER AND WATER/OIL EMULSIONS NBR
FOOD AND DRUG MVQ
AIR NBR
STEAM EPDM - FFKM
ACIDS AND BASES FKM - FFKM

Availability