OB膜片

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O概述

这种型号的膜片在汽缸壁处模压了一个矩形珠子。这种设计要求任何一种膜片的硬件直径最小。这种膜片跟同样高度的其他类型膜片相比，只有其一半的冲程能力。因为这种膜片的箝位和密封紧靠着汽缸的内壁，冲程被限于膜片的下半部分。
Type OB Diaphragm
Dimensions and Tolerances
Type OB Figure 1
Inches mm Inches mm Inches mm Inches mm
Cylinder Diameter
1.00-2.50
25-64
2.51-4.00
64-102
4.01-8.00
102-205
8.01 & up
205 & up
Height
See available sizes table
Cylinder Diameter
Tolerances on Cylinder Diameter and Piston Diameter are ± 0.010 per inch (0.254 mm) of diameter but the tolerance will be no less than ± 0.010 (0.254 mm) or greater than ± 0.060 (1.52 mm)
Piston Diameter
Head & Flange Thickness
.017 ± .004
0.43 ± 0.10
.024 ± .004
0.61 ± 0.10
.035 ± .005
0.89 ± 0.13
.045 ± .007
1.14 ± 0.18
Wall Gauge
.017 ± .003
0.43 ± 0.08
.024 ± .004
0.61 ± 0.10
.035 ± .005
0.89 ± 0.13
.045 ± .007
1.14 ± 0.18
Flash Projection
.025 Max.
0.64 Max.
.035 Max.
0.89 Max.
.040 Max.
1.02 Max.
.056 Max.
1.42 Max.
Flash Thickness
.025 Max.
0.64 Max.
.035 Max.
0.89 Max.
.040 Max.
1.02 Max.
.056 Max.
1.42 Max.
Flange Radius
.031
0.79
.047
1.19
.063
1.60
.063
1.60
Bead Width
.080 ± .003
2.03 ± 0.08
.100 ± .003
2.51 ± 0.08
.120 ± .003
3.05 ± 0.08
.160 ± .003
4.06 ± 0.08
Bead Height
.150 ± .005
3.81 ± 0.13
.200 ± .005
5.08 ± 0.13
.260 ± .005
6.60 ± 0.13
.300 ± .007

 7.62 ± 0.18
Hardware Recommendations

Stamped Retainer Plate Sealing Via Axial Compression

Type OB Figure 2 Type OB Figure 3

Cylinder Diameter

Bead Groove Width = W
Bead Groove Height = H
Lip Radius = R1
Piston Corner Radius = R2
Lip Clearance = C
(Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) (mm)
Sidewall Thickness + .003

1.00-2.50
25-64
.080
2.03
1.50
3.81
.030
0.76
.063
1.60

2.51-4.00
64-102
.100
2.45
.200
5.08
.040
1.02
.094
2.39

4.01-8.00
102-205
.120
3.05
.260
6.60
.050
1.27
.125
3.18

8.01 and up
205 and up
.160
4.06
.300
7.62
.060
1.52
.188
4.78
Available Sizes
Dia•Com
Part No,		 Cylinder
Diameter
 Piston
Diameter
 Height
 Gauge
Approx.
 Convolution
Width
 Effective
Pressure
Area
 Maximum
Half-Stroke
(Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) (mm) (Inches) * (Inches) (mm)

OB-250-178
2.50
64
2.13
54
1.78
45
.035
0.89
.185
4.7
4.21
27.1
1.39
35.3

OB-250-225
2.50
64
2.13
54
2.25
57
.035
0.89
.185
4.7
4.21
27.1
1.86
47.2

OB-250-258
2.50
64
2.06
52
2.58
66
.035
0.89
.220
5.6
4.08
26.3
2.14
54.4

OB-300-284
3.00
76
2.56
65
2.84
72
.035
0.89
.220
5.6
6.07
39.1
2.39
60.7

OB-300-284
3.00
76
2.63
67
2.84
72
.035
0.89
.185
4.7
6.22
40.1
2.45
62.2

OB-306-338
3.06
78
2.63
67
3.38
86
.035
0.89
.215
5.5
6.35
41.0
2.95
74.9

OB-362-340
3.62
92
3.12
79
3.40
86
.035
0.89
.250
6.4
8.92
57.5
2.33
59.2

OB-362-351
3.62
92
3.12
79
3.51
89
.035
0.89
.250
6.4
8.92
57.5
2.44
62.0

OB-363-406
3.62
92
3.12
79
4.06
103
.035
0.89
.250
6.4
8.92
57.5
3.09
78.5

OB-388-406
3.88
99
3.38
86
4.06
103
.035
0.89
.250
6.4
10.34
66.7
3.09
78.5

OB-388-413
3.88
99
3.33
85
4.13
105
.035
0.89
.275
7.0
10.20
65.8
3.12
79.2

OB-416-195
4.16
106
3.66
93
1.95
50
.035
0.89
.250
6.4
12.00
77.4
0.95
24.1

OB-416-353
4.16
106
3.66
93
3.53
90
.035
0.89
.250
6.4
12.00
77.4
2.53
64.3

OB-416-481
4.16
106
3.66
93
4.81
122
.035
0.89
.250
6.4
12.00
77.4
3.81
96.8

OB-475-374
4.75
121
4.25
108
3.74
95
.035
0.89
.250
6.4
15.90
102.6
2.61
66.3

OB-475-541
4.75
121
4.25
108
5.41
137
.035
0.89
.250
6.4
15.90
102.6
4.28
108.7

OB-700-414
7.00
178
6.50
165
4.14
105
.040
1.02
.250
6.4
35.77
230.8
3.01
76.5

*Metric effective pressure area shown in square centimeters.