Claron Polyseal Double Acting Piston Seal SFD

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Design:

Claron Style SFD is a single acting piston seal which may also be arranged back to back in pairs to form a double acting piston assembly. The sealing element is manufactured from fabric reinforced Nitrile Rubber with either an Acetal or fabric reinforced Header ring. The seal assembly forms a highly robust unit resistant to shock loads and high pressures typically found in mobile plant equipment.

Maximum     Pressure
Max Speed                         Temp. Range
m/s                              -30°C to 100°C
0.80                                   400 Bar
0.15                                   600 Bar
NBR Rubber
DIN Hydraulic Fluid Description °C
H Mineral oil without additives 100
H-L Mineral Fluid with anti corrosion and anti ageing additives 100
H-LP Mineral oil as HL plus additives reducing wear, raising load 100
H-LPD Mineral oil as H-LP but with detergents and dispersants 100
H-V Mineral oil as H-LP plus improved viscosity temp. 100
HFA E Emulsions of mineral oil in water. Water content 80-95% 55
HFA S Synthetic oil in water. Water content 80-95% 55
HFB Emulsions of water in mineral oil. Water content 40% 60
HFC Aqueous polymer solutions. Water content 35% 60
HFD R Phosphoric acid ester based NS
HFD S Chlorinated hydrocarbon based NS
HFD T Mixtures of HFD R and HFD S NS
HEPG Polyglycol based NS
HETG Vegetable Oil based 60
HEES Fully synthetic ester based NS

These range perameters are Maximum simultaneous conditions. Optimum service conditions are affected by temperature, speed, pressure, surface finish and extrusion gaps. Refer to appendix 1
for further information.

Note: Clearance gap F is the maximum permissable. i.e. gap completely on one side, in the temperature range of -30°C to 100°C The use of a suitably selected Claron bearing ring will effectively reduce the clearance gap F max. to a value closer to F/2 thus increasing the pressure capability of the seal.

Housing:

For surface finish and recommended lead in chamfers refer to the illustration below. For housing dimensions and machining tolerances refer to the catalogue page of selected seal. Refer to Appendix 4 for value of tolerance symbols.

Fitting:

Style SFD is designed to fit back to back on a split piston. For the seal to function correctly, it is important that care be taken in fitting the seal within its housing. For a detailed checklist, refer to Appendix 3.

Part Number           H9 h11 +0.0
-0.3
+0.3
-0.0
Nominal       Minimum Maximum
ØD1 Ød1 Ød2 Ød3 L1 S C R1
SFD 157098 40,00 25,00 39,00 40,00 9,50 7,50 4,00 0,80
SFD 196137 50,00 35,00 49,00 50,00 9,50 7,50 4,00 0,80
SFD 248188 63,00 48,00 62,00 63,00 9,50 7,50 4,00 0,80
SFD 275196 70,00 50,00 68,50 70,00 12,50 10,00 5,00 0,80
SFD 314236 80,00 60,00 78,50 80,00 12,50 10,00 5,00 0,80
SFD 314236-FH 80,00 60,00 78,50 80,00 12,50 10,00 5,00 0,80
SFD 393314 100,00 80,00 98,50 100,00 12,50 10,00 5,00 0,80
SFD 393314-FH 100,00 80,00 98,50 100,00 12,50 10,00 5,00 0,80
SFD 413334 105,00 85,00 103,50 105,00 12,50 10,00 5,00 0,80
SFD 413334/1FH 105,00 85,00 103,50 105,00 13,50 10,00 5,00 0,80
SFD 433354-FH 110,00 90,00 108,50 110,00 12,50 10,00 5,00 0,80
SFD 452354 115,00 90,00 113,50 115,00 15,50 12,50 6,50 1,20
SFD 452354-FH 115,00 90,00 113,50 115,00 15,50 12,50 6,50 1,20
SFD 492393 125,00 100,00 123,50 125,00 15,50 12,50 6,50 1,20
SFD 492393-FH 125,00 100,00 123,50 125,00 15,50 12,50 6,50 1,20
SFD 511413 130,00 105,00 128,50 130,00 17,00 12,50 6,50 1,20
SFD 551472 140,00 120,00 138,50 140,00 15,00 10,00 5,00 0,80
SFD 551472-FH 140,00 120,00 138,50 140,00 15,00 10,00 5,00 0,80
Items in BOLD are to suit ISO 5597 housings.
Suffix FH denotes Fabric reinforced header.

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Claron Polyseals

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