Merkel Double Wiper PRW 1 with Integrated Pressure Relief
1. Features
Merkel PRW1 lips dust ring has an integral pressure relief function and special sealing and dust lip design.
2. Advantages
This way lips mouth dust ring, suitable for installation cavity trenches standard ISO 6195 A-type.
■ This unidirectional lips mouth dust ring, because there is a whole relief function (patent protection), so there is no back pressure between the wiper and rod seal.
■ Because the use of the seal edge with burr, improves the sealing performance of the entire system.
■ dust lip to maintain a scraper effect.
■ static sealing lip increases the impedance of dust and mud intrusion function.
3. Material
Material Code Hardness
Polyurethane 94 AU 925 94 Shore A
Polyurethane 92 AU 21100 92 Shore A
4. Operating conditions
Material 94 AU 925 92 AU 21100
Temperature range ℃
Hydraulic oil HL, HLP -30 ~ + 100 -40 ~ + 100
HFA fluid + 5 ~ + 50 + 5 ~ + 50
HFB fluids + 5 ~ + 50 + 5 ~ + 50
HFC fluid -30 to +40 -30 to +40
HFD fluids - -
Water + 5 ~ + 40 + 5 ~ + 40
HETG (rapeseed oil) -30 ~ + 60 -40 ~ + 60
HEES (synthetic ester) -30 ~ + 60 -40 ~ + 80
HEPG (ethylene glycol) -30 to +40 -40 to +40
Mineral oil -30 to +110 -40 to +100
Line speed m / s 0.6
5. cavity and machining standards
Surface machining precision
Valley height Ra Rmax
Sliding surface 0.05 ... 0.3 um ≤2.5 um
Trench floor ≤1.6 um ≤6.3 um
Trench side ≤3.0 um ≤15.0 um
In the cutting depth c = Rz / 2 and reference line Cref = 0%, the surface of the support length than Mr> 50% to a maximum of 90%.
6. Install
The gap size
Section 16 MPa 26 MPa 32 MPa
> 4,0 mm ... ≤5,0 mm 0,50 mm 0,40 mm 0,35 mm
> 5,0 mm ... ≤7,5 mm 0,55 mm 0,45 mm 0,40 mm
Tolerance recommendation
Nominal diameter Ø d D d
≤180 mm H11 f8
Tolerance ring diameter d of a buffer is determined
7. Recommended Applications
Construction machinery, industrial vehicles, loading platforms, agricultural machinery, cranes, support cylinders.
Merkel ----- PRW1 type relief-type dust ring type table
Model d * D * L / H Order No.
PRW1 22 * 30 * 4/7 49012374
PRW1 22 * 30 * 4/7 49024430
PRW1 25 * 33 * 4/7 49012375
PRW1 25 * 33 * 6/7 49024400
PRW1 28 * 36 * 4/7 528538
PRW1 28 * 36 * 4/7 49024429
PRW1 30 * 38 * 4/7 530000
PRW1 30 * 38 * 4/7 49032529
PRW1 32 * 40 * 4/7 531403
PRW1 32 * 40 * 4/7 49024428
PRW1 35 * 43 * 4/7 531022
PRW1 36 * 44 * 4/7 531411
PRW1 37 * 45 * 4/7 49012106
PRW1 37 * 45 * 4/7 49024431
PRW1 38 * 46 * 4/7 49005191
PRW1 40 * 48 * 4/7 531116
PRW1 40 * 48 * 4/7 49024427
PRW1 42 * 50 * 4/7 49044911
PRW1 43 * 51 * 4/7 49023978
PRW1 43 * 51 * 4/7 49023979
PRW1 45 * 53 * 5 / 7.8 49031586
PRW1 45 * 53 * 4/7 531412
PRW1 48 * 58 * 6.3 / 9 526679
PRW1 50 * 58 * 4/7 528607
PRW1 50 * 60 * 6.3 / 9 49040950
Note: The above PRW1 lips dust ring type models and parameter table, detailed parameter information, please contact us!
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