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Groove Details

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We have supplied this handy groove guide which will allow you to specify the size of the groove for o-rings and back-up rings, allowing a perfect seal in your hydraulic system. A guide is also available which demonstrates the required reduction in clearances for a given pressure.

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Piston Seals for Dynamic Applications in Hydraulics

Gland Seals for Dynamic Applications in Pneumatics

Face Seals for Static Applications

Clearances for Pressure

Piston Seals for Dynamic Applications in Hydraulics

pistondynamicgroove

O-Ring Cross Section (mm)Depth 'C' (mm)Width 'H' (mm)Additional Width 'B' for Back-Up Ring (mm)
1 0.9 1.3 1.0
1.5 1.3 1.9
1.6 1.4 2
1.78 1.5 2.3 1.4
1.9 1.6 2.4
2 1.7 2.4
2.4 2.1 2.9
2.5 2.2 3
2.62 2.3 3.1
2.7 2.4 3.2
3 2.6 3.6
3.5 3.1 4.2
3.53 3.1 4.2
3.6 3.2 4.3
4 3.5 4.8 1.7
4.5 4 5.4
5 4.45 6
5.33 4.7 6.4
5.5 4.95 6.6
5.7 5.1 6.9
6 5.4 7.2
6.5 5.8 7.8
6.99 6.3 8.4 2.5
7 6.3 8.4
7.5 6.7 9
8 7.2 9.6
8.4 7.6 10.1
8.5 7.7 10.2
9 8.2 10.8
9.5 8.6 11.4
10 9.1 12

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Gland Seals for Dynamic Applications in Pneumatics

glanddynamicgroove

O-Ring Cross Section (mm)
Depth 'C' (mm)Width 'H' (mm)Additional Width 'B' for Back-Up Ring (mm)
1 0.95 1.3 1.0
1.5 1.35 1.9
1.6 1.45 2
1.78 1.55 2.3 1.4
1.9 1.75 2.4
2 1.8 2.4
2.4 2.15 2.9
2.5 2.25 3
2.62 2.35 3.1
2.7 2.45 3.2
3 2.75 3.6
3.5 3.25 4.2
3.53 3.25 4.2
3.6 3.35 4.3
4 3.7 4.8 1.7
4.5 4.2 5.4
5 4.65 6
5.33 4.95 6.4
5.5 5.15 6.6
5.7 5.35 6.9
6 5.65 7.2
6.5 6.1 7.8
6.99 6.6 8.4 2.5
7 6.6 8.4
7.5 7.1 9
8 7.6 9.6
8.4 7.9 10.1
8.5 8 10.2
9 8.5 10.8
9.5 9 11.4
10 9.5 12

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Face Seals for Static Applications

facestaticgroove

O-Ring Cross Section (mm) Depth 'C' (mm) Width 'H' (mm)
1 0.8 1.3
1.5 1.1 1.9
1.6 1.2 2.1
1.78 1.3 2.3
1.9 1.4 2.4
2 1.5 2.6
2.4 1.8 3.1
2.5 1.9 3.2
2.62 2 3.4
2.7 2.1 3.5
3 2.3 3.9
3.5 2.7 4.5
3.53 2.7 4.5
3.6 2.8 4.7
4 3.15 5.2
4.5 3.6 5.8
5 4 6.5
5.33 4.3 6.9
5.5 4.5 7.1
5.7 4.65 7.4
6 4.95 7.8
6.5 5.4 8.4
6.99 5.85 9.1
7 5.85 9.1
7.5 6.3 9.7
8 6.75 10.4
8.4 7.15 10.9
8.5 7.25 11
9 7.7 11.7
9.5 8.2 12.3
10 8.65 13

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Clearances for Pressure

As the required pressure increases, the clearance between the two faces needs to be reduced in order for the seal to work effectively. The following guide shows the necessary clearance for a given pressure.

Pressure

PSI (bar)

With Back-Up Ring

Inch (mm)

Without Back-Up Ring

Inch (mm)

100

(6.9)

0.036

(0.914)

0.031

(0.787)

200

(13.8)

0.032

(0.8128)

0.025

(0.635)

300

(20.7)

0.028

(0.7112)

0.022

(0.5588)

400

(27.6)

0.026

(0.6604)

0.018

(0.4572)

600

(41.4)

0.024

(0.6096)

0.014

(0.3556)

800

(55.2)

0.021

(0.533)

0.01

(0.254)

1000

(68.9)

0.018

(0.4572)

0.007

(0.1778)

1500

(103.4)

0.014

(0.3556)

0.004

(0.1016)

2000

(137.9)

0.01

(0.254)

0.002

(0.0508)

3000

(206.8)

0.006

(0.1524)


4000

(275.8)

0.004

(0.1016)


5000

(344.7)

0.003

(0.0762)


6000

(413.7)

0.002

(0.051)


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