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Home  > PRODUCTS  > Piston Seals  >  DPM - PTFE Hydraulic Piston Seal with NBR/FKM O-Ring
DPM - PTFE Hydraulic Piston Seal with NBR/FKM O-Ring

DPM - PTFE Hydraulic Piston Seal with NBR/FKM O-Ring

Diameter Range
3-1600mm
Pressure Range
0-35MPa
Temperature Range
-30℃+120℃
Speed
0.5m/s
Medium
petroleum base hydraulic oil,nonflammable hydraulic oil, environmental protection hydraulic oil
Installation Recommendation

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Application and properties

DBM/TPM is a double acting sealing and guiding element, Consisting of an elastomer, two back-up rings and two guide rings. Dynamic and static properties of the elastomer play a good sealing role, The back-up ring prevents the elastomer from being squeezed into the sealing gap, the function of the guide ring is to guide the piston in the cylinder and absorb the radial force. The sealing is mainly used for piston and hydraulic cylinder, such as bulldozers, excavators, loaders, hydraulic gates and agricultural machinery.

Standard materials

Guide ring: filled PTFE / PA

Back-up ring: TPU polymer

Elastomer: NBR

Working Conditions

Working  Conditions

Diameter Range

Pressure Range

Temperature Range

Speed

Medium

3-1600mm

0-35MPa

-30℃+120℃

0.5 m/s

petroleum base hydraulic oil,nonflammable hydraulic oil, environmental protection hydraulic oil

Installation Dimensions

Cylinder Dia.

Groove Size

Order No.

DN H9

d1

L1 +0.2

d2 h9

d3 h11

L2 +0.1

20
22
25

11
13
15

13.5
13.5
12

17
19
21

19
21
23

2.1
2.1
4

TPM20*11*13.5*2.1
TPM22*13*13.5*2.1
TPM25*15*12*4

25
25
25

15
15
16

12.5
16.4
13.5

22
21.45
22

24
23.5
24

4
6.35
2.1

TPM25*15*12.5*4
TPM25*15*16.4*6.35
TPM25*16*13.5*2.1

28
30
30

19
17
21

13.5
15.4
13.5

25
26.5
27

27
28.5
29

2.1
6.35
2.1

TPM28*19*13.5*2.1
TPM30*17*15.4*6.35
TPM30*21*13.5*2.1

32
32
35

22
22
25

15.5
16.4
15.5

28
28.5
31

31
30.5
34

2.6
6.35
2.6

TPM32*22*15.5*2.6
TPM32*22*16.4*6.35
TPM35*25*15.5*2.6

35
40
40

25
24
26

16.4
18.4
15.5

31.4
35.4
36

33.5
38.5
39

6.35
6.35
2.6

TPM35*25*16.4*6.35
TPM40*24*18.4*6.35
TPM40*26*15.5*2.6

40
40
40

30
30
30

12.5
12.5
16.4

36
37
35.4

38
39
38.5

4
4
6.35

TPM40*30*12.5*4
TPM40*30*12.5*4
TPM40*30*16.4*6.35

42
45
45

28
29
31

15.5
18.4
15.5

38
40.4
41

41
43.5
44

2.6
6.35
2.6

TPM42*28*15.5*2.6
TPM45*29*18.4*6.35
TPM45*31*15.5*2.6

45
50
50

35
34
34

16.4
18.4
20.5

40.4
45.4
46

43.5
48.5
49

6.35
6.35
3.1

TPM45*35*16.4*6.35
TPM50*34*18.4*6.35
TPM50*34*20.5*3.1

55
55
56

39
39
40

18.4
20.5
20.5

50.36
51
52

53.5
54
55

6.35
3.1
3.1

TPM55*39*18.4*6.35
TPM55*39*20.5*3.1
TPM56*40*20.5*3.1

60
60
63

44
44
47

18.4
20.5
18.4

55.4
56
58.4

58.5
59
61.5

6.35
3.1
6.35

TPM60*44*18.4*6.35
TPM60*44*20.5*3.1
TPM63*47*18.4*6.35

63
63
65

47
47
49

19.4
20.5
20.5

58.4
59
61

61.5
62
64

6.35
3.1
3.1

TPM63*47*19.4*6.35
TPM63*47*20.5*3.1
TPM65*49*20.5*3.1

65
70
70

50
50
54

18.4
22.4
20.5

60.4
64.2
66

63.5
68.3
69

6.35
6.35
3.1

TPM65*50*18.4*6.35
TPM70*50*22.4*6.35
TPM70*54*20.5*3.1

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Installation Dimensions

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