POLYPAC PHD SEAL

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POLYPAC PHD SEAL

Description

The POLYPAC PHD SEAL is a high-pressure heavy-duty piston seal with excellent leakage control and superior extrusion and wear resistance

The POLYPAC PHD SEAL is a combination of a PTFE based 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.

POLYPAC PHD Seal figuur 21

Advantages

– Simple groove design
– No stick-slip effect when starting for smooth operation
– Minimum static and dynamic coefficient of friction
– Increased clearance possible
– Due to larger extrusion gap, safe use even with soiled
media
– Long service life

Application Examples

The PHD Seal is the recommended sealing element for double acting pistons of hydraulic cylinders working in very harsh conditions such as:

  • Excavators
  • Heavy duty hydraulic cylinders

Technical Data

Operating conditions
pressure:             Up to 40 MPa
Peak pressure up to 60 MPa

Speed:                  Up to 1.5 m/s

Temperature:    -45qC to +135qC

Media:              Mineral oil based hydraulic fluids,
water/oil and glycol/oil emulsions

Clearance:       The maximum permissible radial
clearance Smax is shown in Table XXI,
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
  • In water /oil and water/glycol emulsions

Slipper Seal: Bronze filled PTFE

Energiser: NBR 80 Shore A

Back-up rings: POM

Material code for the set: PTNO4

Special Application:

For special applications requiring other material combinations, please contact your local Busak+Shamban Company.

POLYPAC PHD Seal Table XX

POLYPAC PHD Seal figuur 22

 

POLYPAC PHD SEAL

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
PKP000500 PHD 5036
55,0 41,0 9,0 5,0 0,3 PKP000550 PHD 5541
60,0 46,0 9,0 5,0 0,3 PKP000600 PHD 6046
63,0 48,0 11,0 5,0 0,5 PKP000630 PHD 6348
65,0 50,0 11,0 5,0 0,5 PKP000650 PHD 6550
70,0 55,0 11,0 5,0 0,5 PKP000700 PHD 7055
75,0 60,0 11,0 5,0 0,5 PKP000750 PHD 7560
80,0 65,0 11,0 5,0 0,5 PKP000800 PHD 8065
85,0 70,0 11,0 5,0 0,5 PKP000850 PHD 8570
90,0 75,0 11,0 5,0 0,5 PKP000900 PHD 9075
95,0 80,0 12,5 5,0 0,5 For pressure up PKP000950 PHD 9580
100,0 85,0 12,5 5,0 0,5 to 35 MPa
0.50
PKP001000 PHD 10085
105,0 90,0 12,5 5,0 0,5 PKP001050 PHD 10590
110,0 95,0 12,5 5,0 0,5 For pressure PKP001100 PHD 11095
115,0 100,0 12,5 5,0 0,5
from 35 MPa up to 60 MPa 0.30
PKP001150 PHD 115100
120.0
125.0
105.0
102.0
12.5
16.0
5.0
6.5
0.5
0.6
PKP001200
PKP001250
PHD 120105
PHD 125102
130,0 107,0 16,0 6,5 0,6 PKP001300 PHD 130107
135,0 112,0 16,0 6,5 0,6 PKP001350 PHD 135112
140,0 117,0 16,0 6,5 0,6 PKP001400 PHD 140117
145,0 122,0 16,0 6,5 0,6 PKP001450 PHD 145122
150,0 127,0 16,0 6,5 0,6 PKP001500 PHD 150127
155,0 132,0 16,0 6,5 0,6 PKP001550 PHD 155132
160,0 137,0 16,0 6,5 0,6 PKP001600 PHD 160137
165,0 142,0 16,0 6,5 0,6 PKP001650 PHD 165142
170,0 147,0 16,0 6,5 0,6 PKP001700 PHD 170147
180,0 157,0 16,0 6,5 0,6 PKP001800 PHD 180157

 

Ordering Example

PHD Seal, complete.

Bore diameter:               DN = 80.0 mm
Part No.:                          PKP000800 (from Table)
Seal:                                  PTFE TR55
Energiser:                        NBR
Back-up ring:                  POM
Material set-code:          PTN04
Polypac Ref. No.:            PHD 8065

POLYPAC PHD Seal Order

 

Merk

Busak Shamban

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