POLYPAC PHD/P
Description
The POLYPAC PHD/P Seal is a high-pressure heavy-duty piston seal with excellent leakage control and superior extrusion and wear resistance
The POLYPAC PHD/P seal is a combination of a Zurcon polyurethane slipper seal energised by an elastomer profile ring and completed with two Back-up rings (POM). It is manufactured with a predefined interference fit, which together with the squeeze of the elastomer part ensures a good sealing effect even at low system pressure. At higher pressures the elastomer part is energised by the system pressure and consequently activates the slipper seal in the radial direction.
The Back-up rings prevent the slipper seal from extrusion and ensure a long service life even under harsh conditions.
Advantages
– Simple groove design
– Excellent sealing effect
– Excellent wear resistance
– Increased clearance possible
– Long service life
Application Examples
The POLYPAC PHD/P Seal is the recommended sealing element for double acting pistons of hydraulic cylinders working in very harsh conditions such as:
- Excavators
- Heavy duty cylinders
Technical Data
Operating conditions
pressure: Up to 40 MPa
Peak pressure up to 60 MPa
Speed: Up to 0.5 m/s
Temperature: -35qC to +110qC
Media: Mineral oil based hydraulic fluids
Clearance: The maximum permissible radial
clearance Smax is shown in Table, as a function of the operating
pressure and functional diameter
Important Note:
The above data are maximum values and cannot be used at the same time. e.g. the maximum operating speed depends on material type, pressure, temperature and gap value. Temperature range also dependent on medium
Materials
Standard Application:
For hydraulic components in mineral oils or medium with good lubricating performance.
Slipper Seal: Zurcon Z20 93 Shore A
Energiser: NBR 80 Shore A
Back-up rings: POM
Material code for the set: Z2053
POLYPAC PHD/P
Bore Dia. | Groove Dia. | Groove Width | Inlet Chamfer | Radius | Radial Clearance | Part No | Polypac Ref. No. |
DN H9 | d1 h9 | L1 +0.2 | C | r1 | S | ||
50,0 | 36,0 | 9,0 | 5,0 | 0,3 | For pressure up to 35 MPa 0. 0 For pressure from 35 MPa up to 60 MPa 0.30 |
PKP0P0500 | PHD 5036P |
55,0 | 41,0 | 9,0 | 5,0 | 0,3 | PKP0P0550 | PHD 5541P | |
60,0 | 46,0 | 9,0 | 5,0 | 0,3 | PKP0P0600 | PHD 6046P | |
63,0 | 48,0 | 11,0 | 5,0 | 0,5 | PKP0P0630 | PHD 6348P | |
65,0 | 50,0 | 11,0 | 5,0 | 0,5 | PKP0P0650 | PHD 6550P | |
70,0 | 55,0 | 11,0 | 5,0 | 0,5 | PKP0P0700 | PHD 7055P | |
75,0 | 60,0 | 11,0 | 5,0 | 0,5 | PKP0P0750 | PHD 7560P | |
80,0 | 65,0 | 11,0 | 5,0 | 0,5 | PKP0P0800 | PHD 8065P | |
85,0 | 70,0 | 11,0 | 5,0 | 0,5 | PKP0P0850 | PHD 8570P | |
90,0 | 75,0 | 11,0 | 5,0 | 0,5 | PKP0P0900 | PHD 9075P | |
95,0 | 80,0 | 12,5 | 5,0 | 0,5 | PKP0P0950 | PHD 9580P | |
100,0 | 85,0 | 12,5 | 5,0 | 0,5 | PKP0P1000 | PHD 10085P | |
105,0 | 90,0 | 12,5 | 5,0 | 0,5 | PKP0P1050 | PHD 10590P | |
110,0 | 95,0 | 12,5 | 5,0 | 0,5 | PKP0P1100 | PHD 11095P | |
115,0 | 100,0 | 12,5 | 5,0 | 0,5 | PKP0P1150 | PHD 115100P | |
120,0 | 105,0 | 12,5 | 5,0 | 0,5 | PKP0P1200 | PHD 120105P | |
125,0 | 102,0 | 16,0 | 6,5 | 0,6 | PKP0P1250 | PHD 125102P | |
130,0 | 107,0 | 16,0 | 6,5 | 0,6 | PKP0P1300 | PHD 130107P |
135,0 | 112,0 | 16,0 | 6,5 | 0,6 | For pressure up to 35 MPa 0.50 For pressure from 35 MPa up to 60 MPa 0.30 |
PKP0P1350 | PHD 135112P |
140,0 | 117,0 | 16,0 | 6,5 | 0,6 | PKP0P1400 | PHD 140117P | |
145,0 | 122,0 | 16,0 | 6,5 | 0,6 | PKP0P1450 | PHD 145122P | |
150,0 | 127,0 | 16,0 | 6,5 | 0,6 | PKP0P1500 | PHD 150127P | |
155,0 | 132,0 | 16,0 | 6,5 | 0,6 | PKP0P1550 | PHD 155132P | |
160,0 | 137,0 | 16,0 | 6,5 | 0,6 | PKP0P1600 | PHD 160137P | |
165,0 | 142,0 | 16,0 | 6,5 | 0,6 | PKP0P1650 | PHD 165142P | |
170,0 | 147,0 | 16,0 | 6,5 | 0,6 | PKP0P1700 | PHD 170147P | |
180,0 | 157,0 | 16,0 | 6,5 | 0,6 | PKP0P1800 | PHD 180157P |
Ordering Example
POLYPAC PHD/P Seal, complete.
Bore diameter: DN = 80.0 mm
Part No. PKP0P0800 (from Table)
Material set-code: Z2053
Polypac Ref. No.: PHD 8065P
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