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EPM, Inc.
112 W Burke St.
Stockbridge, GA 30281
800-659-5050
sales@epm.com

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Gland Design 2016-12-29T09:16:46+00:00

GLAND DESIGN
gland_designdia2

*Care should be taken when designing glands.

U-Packings

1. Dimensional tolerance and surface finish of the glands should be in accordance with Figure G-1. The roughness of packing sliding faces should be 0.4a for rubber packings and 0.8a for rubber-proofed cotton fabric v-packings.
2. The diameter clearance between the piston diameter (D1) and the cylinder diameter is recommended per Figure G-2.
3. The cylinder end and the piston end myst be chamfered as shown by Figure G-2 so as not to damage packings when mounting them and/or assembling cylinders.
4. H9/f8 is recommended for fitting between the cylinder tube and the piston, Figure G-1.

Figure G-1 (U-Packing Housing Dimensions)

gland_designdia1


Diameter

Diameter Clearance (D-D1)
Under 100 inches
101 to 160 inches
160+ inches

1
2
3

 

Unit: mm


Diameter D or d

L
22.4 max.
80 max.
100 max.
140 max.
160 max.

2
3
4
5
6

 

Unit: mm


Figure G-2 – Clearance & Chamfering

V-Packings


gland_designdia2


Box Width

Relief Clearance
Under 6 incl.
Over 6 to 10 incl.
Over 10 to 15 incl.
Over 15 to 20 incl.
20 and over

0.8 (Diametral Clearance 1.6)
1.5 (Diametral Clearance 3.0)
2.5 (Diametral Clearance 5.0)
3.5 (Diametral Clearance 7.0)
4.5 (Diametral Clearance 9.0)

 

Unit: mm


Figure V-1 (Chamfering of Housing Entrance)