OGP
The piston seal set OGP is a single acting seal element consisting of a PTFE-ring for the dynamic sealing (primary seal) and an O-ring as elastic pretension element (secondary seal). The seal set OGP is used to seal double impinged pistons in hydraulic cylinders (2 seal sets OGP per piston). It is excellent qualified for piston seals, where great demands on the easy functionality, the density and the accuracy of positioning are made.
ADVANTAGES ARE
- high static and dynamic density
- small breakaway torques and sliding friction
- no stick-slip even at low speed
- small, simple fitting area
- good availability even in intermediate sizes for diameters up to 2.500 mm
- universal chemical resistance
- high temperature resistance
- high security from extrusion
- small abrasion
- mounting in closed fitting areas (> 50 mm piston diameter)
APPLICATION RANGE
| working pressure : | 40 MPa (400 bar)* |
| working temperature: | - 35 to + 200 °C (depending on the O-ring)** |
| surface speed: | ≤ 15 m/s axial |
| media: | all hydraulic fluids, e.g. water, oils, water-oilemulsions, lame-proof hydro-oils, environmentfriendly pressure fluids (bio-oils) etc. - depending on the O-ring. We recommend to use guiding elements (e.g. profile F3S) with this seal. Chiefly in hydraulic components of machine tools, pressings, injection moulding machines, mobile hydraulics |
MATERIAL
| Slide ring: | PT052 |
| O-ring: | NBR-elastomer with approx. 70 Shore A |
MOUNTING INSTRUCTIONS
To avoid damage to the sealing lip, the seals should not be drawn over sharp edges during installation. In normal case the OGP is mountable on closed grooves from a diameter of 50 mm. The fitting areas are to be deburred and to be cleaned. The cylinder liners must own lead-in chamfers. A too strong and irregular extension of the PTFE ring is to be avoided. By applying piston rings up to 100 mm the use of an assembly aid is recommendable.
For special cases of application (high temperatures, speed, specific pressure, use in water, HFA-, HFB-fluids etc.) please get in contact with our consultancy service.
HOUSING DIMENSIONS
| Series no. | Cross-section | O-ring | Recommended rod Ø range | Groove width | Groove depth | Gap max. | Gap max. | Radius max. | |
| Cross-section | D (mm) | 0-200 bar | 200-400 bar | ||||||
| NBR 70 | (mm) | ≥ | < | L (mm) | G (mm) | e (mm) | e (mm) | R1 (mm) | |
| 27N1 | A | 1,78 | 8 | 17 | 2,2 | 2,45 | 0,6-0,4 | 0,4-0,2 | 0,5 |
| 27N1 | B | 2,62 | 17 | 27 | 3,2 | 3,65 | 0,8-0,5 | 0,5-0,3 | 0,5 |
| 27N1 | C | 3,53 | 27 | 60 | 4,2 | 5,35 | 0,8-0,5 | 0,5-0,3 | 0,5 |
| 27N1 | D | 5,33 | 60 | 200 | 6,3 | 7,55 | 1,0-0,6 | 0,6-0,4 | 0,9 |
| 27N1 | E | 6,99 | 200 | 330 | 8,1 | 10,25 | 1,0-0,6 | 0,6-0,4 | 0,9 |
| 27N1 | F | 6,99 | 256 | 670 | 8,1 | 12,00 | 1,2-0,7 | 0,7-0,5 | 0,9 |
| 27N1 | G | 8,40 | 670 | 1000 | 9,5 | 13,65 | 1,4-0,8 | 0,8-0,6 | 0,9 |
ORDER EXAMPLE
OGP 0800 PT052 27N1 D
| Piston diameter: | 80 mm |
| OGP | = Profile |
| 0800 | = Piston Ø x 10 |
| PT052 | = Compound |
| 27N1 | = Serial number, Last digit: O-ring code |
| D | = Cross section |
PLEASE NOTE
For special applications it is recommendable to use a sealing cross section, reduced or stepped up, that differs from standard, In these cases replace the standard cross section code (e.g. „D“) by the desired one (e.g. „C“ or „E“).
* At reduced extrusion gap (H7/f7) up to 600 bar.
** At deviations from the standard temperature, please make an enquiry about the O-ring compound.
Download | Detailed product information (PDF 487.0 kB)
