Steplock® Composite Slipper piston seals
Steplock® 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.
| Housing class |
A cylinder bore range |
F groove diameter |
L 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 |
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| Coding example | |
| profile code StepLock bore 100 housing class N4 materials: Neuflon 031 O-Ring NBR |
StepLock 100 N4 N-031 NBR |
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STEPLOCK® ASSEMBLING RESIZING NOT REQUIRED |
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| 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. |
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 |
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| 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 |
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| Acids and Bases | N-032 N-059 N-074 |
N-032 N-043 N-074 |
N-009 N-032 N-043 N-074 |
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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 |
