Rotary shaft seals

Rotary piston seal Rotoslipper

Rotating piston seal Rotoslipper

Slow rotational movements, fast translational movements and combined roto-translational movements.
Working conditions: Max. pressure 800 bar Temperature range -60 a + 150°C. Rotational movements: up to 120 rpm with max peripheral speed of 0.6 m/sec and PV max 25 bar x m/sec. Translational movements: max 5 m/sec
At max temperature and/or in dry running conditions, pressure and speed should be adequately reduced.
Please contact our technicians for evaluating working conditions and the thermal analysis of the project.

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OVERVIEW

Rotating piston seal Rotoslipper

Slow rotational movements, fast translational movements and combined roto-translational movements.
Working conditions: Max. pressure 800 bar
Temperature range -60 a + 150°C.
Rotational movements: up to 120 rpm with max peripheral speed of 0.6 m/sec
Translational movements: max 5 m/sec
At max temperature and/or in dry running conditions, pressure and speed should be adequately reduced.
Please contact our technicians for evaluating working conditions and the thermal analysis of the project.

 

High quality Parker O-Rings only.
HD Slippers Srl supplies only high quality Parker O-Rings within its Rotoslipper rotary Seal kits.

 
Rotoslipper NPSR piston - NPSR icon
NPSR
Rotary piston seal Rotoslipper image
Housing
class		 A
cylinder bore		 F
groove diameter		 L
groove width		 R S
min		 G*

In closed groove
  standard groove special groove         max. radial gap if A>=
  H7 h9 H12     Bar 50

100

 200 400

800

  
K1 8 - 29,9 6 -100 A - 4.9 2.2 0.4 1.2 0.2 0.2 0.15 0.1 0.05

25
K2 30 - 69,9 12 - 250 A -7,5 3.2 0.6 2.2 0.35 0.3 0.25 0.15 0.07

30
K3 70 -132,9 15 - 450 A - 11.0 4.2 0.8 2.6 0.5 0.45 0.25 0.15 0.07

60
K4 133 - 329,9 17 - 650 A - 15,5 6.3 1 5.6 0.6 0.45 0.25 0.15 0.1

100
K5 330 - 689,9 130 - 1100 A - 21.0 8.1 1.5 8.2 0.8 0.5 0.3 0.15 0.1

180
K6 690 -1100 130 - 1100 A - 24,5 8.1 1.5 8.2 0.8 0.5 0.3 0.15 0.1

300
K7 690 - 1100   A - 28.0 9.5 1.5 9.5 0.9 0.6 0.4 0.15 0.1

180
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 NPSR
bore 100
housing class K3
materials: Neuflon 031 O-Ring NBR		 Rotoslipper NPSR 100 K3 N-031 NBR
assembly
SLIPPER COMPOSITE SEALS ASSEMBLING INSTRUCTIONS

 

ASSEMBLY ON PISTON IN CLOSED GROOVE AND IN OPEN GROOVE

 

slipper composite seals assembling Assembly in closed groove can be carried out manually, however the use of the appropriate equipment guarantees the integrity of the slipper and time-saving insertion.

Assembly in open groove is suggested for slippers exceeding the dimensions shown in dimensional table.

Correctly carried out introduction blunting and the lubrication of the surfaces make assembly easier.

For an easier assembling in closed groove the preheating of the Slipper in oil or water bath at 90-100°C is suggested.		 slipper composite seals assembling

 

INSERTION AND RECALIBRATION EQUIPMENT FOR INSTALLATION IN CLOSED GROOVES ON THE PISTON

 

slipper composite seals assembling The expander cone brings the Slipper to the diameter of the piston, or to the edge of the groove when other existing grooves must be passed over.

The thruster expands sector by sector, or more simply, in single logitudinal cutting.

Both the cone and thruster can be made in acetal resin (POM), polyester (PBTF) or polyamide (PA6)

The prolonged extended permanence of the Slipper during installation could determine a permanent increase in diameter; therefore fast installation is advised.
Recalibration of the slipper may be opportune using a sleeve before insertion of the piston in the cylinder.

The sleeve also allows the passing over of grooves and threads.		 slipper composite seals assembling

 

INSTALLATION ON THE CYLYNDER IN CLOSED GROOVE

 

slipper composite seals assembling

The Slipper seal can be introduced in the closed groove imposing a reniform deformation.


The radius R should never be little then 3 times S

Open groove installation is advised for rods exceeding  the diameter shown in dimensional table.

 slipper composite seals assembling

The mono-directional R type Slipper is
installed using this method of positioning
the seal-front towards the pressure.
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. Login required.

HD Slippers
code		 Composition Color Approvals ΔT °C Description
N-009 Ptfe-oxides blue   -268 +260 All pourpose on soft surfaces
N-095 Tfm white FDA -268 +260 Low creep, better strength.
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-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-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-033 Ptfe-glass fibre MoS2 gray FDA -268 +260 Fit for hard surfaces
N-103 Ptfe-Carbon fibre black   -268 +260 Fit for hard surfaces
N-102 Ptfe-Liquid crystal polymer beige FDA - EU
 -268 +260 Food & Pharma, fit for soft surfaces
N-088 Ptfe-polyimide yellow  

-268 +260

 Fit for soft surfaces
N-074 PEHMW white FDA -140 +80 High wear and extrusion resistance
N-155 PVDF white FDA -30 +140 High modulus
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 P95-A112		 N-031
N-032 N-060 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-074		 N-032
N-060 N-074		 N-009
N-043 N-074		 N-032
N-074		 N-009
N-032 N-074
Drugs and food N-074
N-102 N-043 N-060 N-095 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-074		 N-032
N-043 N-074		     N-009
N-032 N-043 N-074

 

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		 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-G114		 N-031
N-032 N-060 N-077 P95-G114		 N-032 N-074 P95-G114 N-009
N-032 N-074 P95-G114
Water and oil/water emulsions N-032
N-060 N-077 N-074		 N-032
N-060 N-077 N-074		 N-032
N-074		 N-009
N-032 N-074
Drugs and food N-102
N-043 N-060 N-074 N-088 P95-G114		 N-009
N-074 P95-G114		 N-009
N-074 P95-G114		 N-009
N-074 P95-G114
Air N-032
N-031 N-043 N-074 P95-G114		 N-032
N-043 P95-G114		 N-032
N-074 P95-G114		 N-032
N-009 N-043 N-074 P95-G114
Steam N-032
N-043		 N-032   N-032
N-009 N-043
Acids and Bases

N-032
N-074

 N-032
N-043 N-074		   N-009
N-032 N-043 N-074

 

 

 ELASTOMER ACCORDING WITH FLUID

FLUIDS ELASTOMERS
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
  • To check the availability:
    -choose profile and compound from the drop-down menu
    -input the desired housing class
    -input the desired diameter
  • Once obtained the availability, a request for quotation can be sent.