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.

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

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