Rod sealing set Prädifa series M0 | Product Series

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Inside Diameter (mm)

Outside Diameter (mm)

Element Height (mm)

Groove Width

Minimum Working Temperature (C)

Maximum Working Temperature (C)

Seal Material

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Rod sealing set Prädifa series M0 Rod sealing set Prädifa series M0

Rod sealing set Prädifa series M0

Where to Buy

Rod chevron sealing set for hydraulic cylinders, single-acting. Contains of multiple chevrons, a header ring and a back-up ring.
The number of chevrons vary from 3 up to 10 chevrons. Usually 5 chevrons are prefered.

Technical Specifications

  • Thermal Application Type: Standard Moderate Temperature (-35 to 100°C), High Temperature (< 205°C)
  • Media: Hydraulic
  • Polymer Material Options: Nitrile Butadiene Rubber (NBR, XNBR), Fluorocarbon Rubber (FKM, FPM)
  • Maximum Operating Pressure: 350 bar, 351 bar
  • Minimum Operating Temperature: -40 to -20 °C
  • Maximum Operating Temperature: 100 to 200 °C
  • Maximum Surface Speed: 0.5 m/sec
  • Unit of Measure: Length: mm
  • Cushioning Mechanism: No
  • Pressure Rating: High Pressure (< 500 bar)
Safety Warning

Full Product Description

The M0 chevron sealing set for piston rods consists of several components. Chevrons are available as full rubber (MX) and fabric (MG) versions. They are complemented by a hard fabric pressure ring (MD) and a hard fabric or plastic spacer ring (MS).
The hard fabric pressure ring prevents damage to the U-ring at the gap between the rod and the cylinder sleeve (gap extrusion). It is extremely wear-resistant, resistant against pressure peaks and reliable even in the most adverse conditions (water or particle contamination).
The chevrons are produced with a radial lip preloading which makes the sealing lips contact the sealing area on the inner and outer diameter in a way that achieves good sealing performance with low friction. The operating pressure then additionally provides the required contact pressure of the chevrons against the sealing areas.
The M0 sealing set can be adjusted to achieve a certain extension of service life or reduced friction by using shims.
Chevron sealing sets can also be produced in PTFE compounds, providing them with extremely high temperature and chemical resistance.

• Robust seal profile for harshest operating conditions.
• Insensitive to contamination of the operating medium or slight damage of the sliding surfaces compared with single-part seals.
• The seals can also be cut for installation, which eliminates the need for complete dismantling of the cylinder during maintenance or repair work.
• Insensitive to pressure peaks.
• High extrusion resistance.
• Excellent media resistance in case of suitable compound selection.
• Enables modifications of axial preload and/or readjustment by means of metal spacers (shims or screw rings).

Range of application:
Mainly used in heavy-duty cylinders with large diameters as well as in actuators for rough applications.

Related Documents

Literature and Reference Materials
Installation Guidelines for Rod Seals--PTD3350
Storage and Cleaning of Elastomer Seals--PTD3032
Product Demos & Tutorials
How to Properly Store and Clean Elastomer Seals
Mixing the right ingredients: Material Development at Parker-Prädifa
Parker Final Exam in Physics / Sealing Systems Put to the Test
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Products Inside Diameter (mm) Outside Diameter (mm) Element Height (mm) Groove Width Minimum Working Temperature (C) Maximum Working Temperature (C) Seal Material
M0001300004 12 22 13.5 13.5 -40 100 NBR Fabric
M0001400005 12 22 18.5 18.5 -40 100 NBR Fabric
M0003700033 36 48 22.5 22.5 -40 100 NBR Fabric
M0004100001 40 50 8 8 -40 100 NBR Fabric
M0004600033 45 65 27.5 27.5 -40 100 NBR Fabric
M0004700018 36 46 14 14 -40 100 NBR Fabric
M0005000020 52 72 34 34 -40 100 NBR Fabric
M0005600012 55 75 30 30 -40 100 NBR Fabric
M0005800012 63 83 37 37 -40 100 NBR Fabric
M0006000027 60 80 14.5 14.5 -40 100 NBR Fabric
M0006300003 63 83 27 27 -40 100 NBR Fabric
M0006300074 63 83 32 32 -40 100 NBR Fabric
M0006800032 70 90 35 35 -40 100 NBR Fabric
M0007000005 70 90 40 40 -40 100 NBR Fabric
M0007000033 70 85 22.5 22.5 -40 100 NBR Fabric
M0007500032 78 100 35 35 -40 100 NBR Fabric
M0010000067 100 120 30 30 -40 100 NBR Fabric
M0010900033 110 125 30 30 -40 100 NBR Fabric
M0012700021 127 152 42 42 -40 100 NBR Fabric
M0016800004 40 52 16.5 16.5 -40 100 NBR Fabric
M0016900021 170 190 41 41 -40 100 NBR Fabric
M0019000005 45 60 22.5 22.5 -40 100 NBR Fabric
M0019100005 37 53.3 29 29 -40 100 NBR Fabric
M0020300004 45 60 16.5 16.5 -40 100 NBR Fabric
M0020500001 53 63 8 8 -40 100 NBR Fabric
M0021000021 230 260 66 66 -40 100 NBR Fabric
M0022200004 50 61 17.9 17.9 -40 100 NBR Fabric
M0025200019 50 65 19 19 -40 100 NBR Fabric
M0028400005 55 75 35 35 -40 100 NBR Fabric
M0029100021 290 320 55.5 55.5 -40 100 NBR Fabric
M0029200004 56 71 16.5 16.5 -40 100 NBR Fabric
M0029300005 56 71 22.5 22.5 -40 100 NBR Fabric
M0032800004 63 78 16.5 16.5 -40 100 NBR Fabric
M0033300005 63.5 82.5 31.2 31.2 -40 100 NBR Fabric
M0038900004 80 100 27.5 27.5 -40 100 NBR Fabric
M0039600005 80 100 40 40 -40 100 NBR Fabric
M0044400004 90 110 30 30 -40 100 NBR Fabric
M0047000004 100 115 23.9 23.9 -40 100 NBR Fabric
M0052200001 135 160 20 20 -40 100 NBR Fabric
M0054800004 125 150 33.2 33.2 -40 100 NBR Fabric
M0056300155 130 145 23.4 23.4 -40 100 NBR Fabric
M0058400005 140 160 40 40 -40 100 NBR Fabric
M0058800012 88.9 107.9 34 34 -40 100 NBR Fabric
M0059400004 150 180 45 45 -40 100 NBR Fabric
M0064500021 210 240 62.5 62.5 -40 100 NBR Fabric
M0064700021 240 270 60 60 -40 100 NBR Fabric
M0065800004 260 290 47.5 47.5 -40 100 NBR Fabric
M0066000021 250 280 55.5 55.5 -40 100 NBR Fabric
M0066300021 290 320 60 60 -40 100 NBR Fabric
M0066600021 260 290 62.5 62.5 -40 100 NBR Fabric
M0067900021 310 350 79 79 -40 100 NBR Fabric
M0064700021S 240 270 60 60 -40 100 NBR Fabric
M0066300021S 290 320 60 60 -40 100 NBR Fabric
M0066600021S 260 290 62.5 62.5 -40 100 NBR Fabric
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