Piston Seals and Rod Seals

Type Spring Energized Seals

Dynamic applications that are required to function without lubrication put a greater emphasis on seal design and the materials being used.  Especially in the case of dry running rod seals which are subject to high temperature high pressure conditions,  PTFE compounds combined with advanced fillers must be selected in order to achieve  efficient  performance and a long service life. 

 

Advanced polymer technology combined with many years of practical experience allow our team of engineers to  select the correct combination of material and seal geometry for the application in question. 

Often reciprocating but also in rotary installations,  maintaining a high level of seal efficiency by minimising wear allows our seal solutions to achieve outstanding  levels of performance and longevity.

URI – PTFE Rod Seal

Kolben- und Stangendichtung

For fluids.

 

With sharp-edged sealing lip on the internal diameter
for good wiping effect with rod seals.

Operating limits
T = –75°C to +300°C
p = up to 250 bar
v = 15 m/s ⇔

Standard Type URI
Preferential Range

Ordering example: URI – B12 – 332 – HS 21059 – C

URI = type “rod seal”

B12 = rod Ø 12

332 = nominal cross-section

HS 21059 = casing material

C = spring material

Standard Rod Sizes and Housing Dimensions

Standard Rod Sizes and Housing Dimensions

Rod-∅Groove-∅Housing Dimensions
Bf7AH9G+0,2
35,842,4
46,842,4
57,842,4
68,842,4
810,842,4
812,523,6
1014,523,6
1216,523,6
1418,523,6
1620,523,6
1822,523,6
1923,523,6
2024,523,6
2026,144,7
2228,144,7
2430,144,7
2531,144,7
2834,144,7
3238,144,7
3642,144,7
4049,447,1
4554,447,1
5059,447,1
5665,447,1
6372,447,1
7079,447,1
8089,447,1
9099,447,1
100109,447,1
110119,447,1
125137,109,5
140152,109,5
160172,109,5
180192,109,5
200212,109,5

URA – PTFE Piston Seal

URA – Kolbendichtung

For fluids.

 

With sharp-edged sealing lip on the external diameter
for good wiping effect with piston seals.

Operating limits
T = –75°C to +300°C
p = up to 250 bar
v = 15 m/s ⇔

Standard Type URA
Preferential Range

Ordering example: URA – A50 – 316 – HS 21037 – C
URA = type “piston seal”
A50 = cylinder Ø 50
316 = nominal cross-section
HS 21037 = casing material
C = spring material

Additional diameters/sizes from 2 to 3,000 mm
available on request

Standard Cylinder Sizes and Housing Dimensions

Standard Cylinder Sizes and Housing Dimensions

Cylinder-∅Groove-∅Housing Dimensions
AH9Bf7G+0,2
85,162,4
107,162,4
129,162,4
149,483,6
1611,483,6
1813,483,6
2015,483,6
2217,483,6
2419,483,6
2520,483,6
2518,864,7
2821,864,7
3023,864,7
3225,864,7
3629,864,7
4033,864,7
5040,567,1
6050,567,1
6353,567,1
7060,567,1
8070,567,1
10090,567,1
125112,909,5
140127,909,5
160147,909,5
180167,909,5
200187,909,5
   

URF – PTFE Shaft and Rod Seal

URF – Wellen- und Stangendichtung

With clamping flange for sealing rotary and
swiveling applications.

 

Operating limits
T = –75°C to +300°C
p = up to 250 bar
v = 15 m/s ⇔
v = 2.5 m/s

Standard Type URF
Preferential Range

Ordering example: URF – B20 – 108 – HS 21037 – C
URF = type “shaft seal”
B20 = shaft Ø 20
108 = nominal cross-section
HS 21037 = casing material
(for other compounds see compound table)
C = spring material

Additional diameters/sizes from 2 to 3,000 mm
available on request

Standard Shaft Sizes and Housing Dimensions

Standard Shaft Sizes and Housing Dimensions

Shaft-∅Groove-∅Housing Dimension
Bf7AH9G1 min
35,842,4
59,523,6
610,523,6
812,523,6
1014,523,6
1216,523,6
1418,523,6
1620,523,6
1822,523,6
2026,144,7
2228,144,7
2430,144,7
2531,144,7
2834,144,7
3036,144,7
3238,144,7
3541,144,7
3642,144,7
4049,447,1
4251,447,1
4554,447,1
5059,447,1
5665,447,1
6069,447,1
6372,447,1
7079,447,1
8089,447,1
9099,447,1
100109,447,1
110119,447,1
120129,447,1
125137,109,5
130142,109,5
140152,109,5
160172,109,5
180192,109,5
200212,109,5

URS – PTFE Piston and Rod Seal | PTFE Shaft Seal

URA – Kolbendichtung

For gaseous media.

 

Chamfered sealing lip with large wear reserve;
can be used for rotary and swiveling applications.

Operating limits
T = –75°C to +300°C
p = up to 250 bar
v = 15 m/s ⇔
v = 1 m/s

CRS – PTFE Piston and Rod Seal | Static Seal

CRS – Kolben- und Stangendichtung | Statische Dichtung

Very good sealing performance at high pressures.
Static sealing action, e.g., for slow-moving applications.

 

Operating limits
T = –95°C to +300°C
p = up to 700 bar
v = 0.5 m/s ⇔

Examples of Other Types

PTFE Piston and Rod Seal

Kolben- und Stangendichtung

For extralarge installation dimensions.

 

PTFE Rod Seal and PTFE Shaft Seal

Stangen- und Wellendichtung

With O-ring as static seal.
Very good static sealing effect at the external diameter,
e.g., with rough housing surfaces.

 

PTFE Piston Seals and PTFE Rod Seals

Kolben- und Stangendichtung

For critical fluids (paints, lacquers, gasoline, etc.).
Double sealing edge for improved sealing performance.

 

PTFE Rod Seal

Stangendichtung

(Can also be used as a PTFE piston seal)

 

For separating two media.