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Cryogenic-Rotary Valve

Instruction Manual

Form 5482

February 2005

Table 2. Valve Body Data, Class 150

VALVE

SIZE,

INCHES

SHAFT

DIAMETER

AT YOKE

BEARING

FACE-TO-

FACE

DIMEN-

SION

(1)

MINIMUM

I.D

.(2)

APPROXIMATE

WEIGHT

Wafer

Single

Flange

mm Kilograms

3 16 47.6 71.4 12 16

4 19 54.0 93.7 21 22

6 25 57.2 147.6 24 28

8 25 63.5 196.9 34 40

10 32 71.4 254.0 57 67

12 38 81.0 298.5 74 93

14 30 92 330 87 120

16 32 102 378 133 182

18 38 114 429 170 231

20 44 127 470 210 302

24 57 154 575 326 455

Inches Pounds

3 5/8 1-7/8 2.81 27 36

4 3/4 2-1/8 3.69 46 48

6 1 2-1/4 5.81 53 61

8 1 2-1/2 7.75 75 89

10 1-1/4 2-13/16 10.00 125 148

12 1-1/2 3-3/16 11.75 164 206

14 1-3/16 3-5/8 13 191 265

16 1-1/4 4 14-7/8 294 401

18 1-1/2 4-1/2 16-7/8 374 510

20 1-3/4 5 18-1/2 463 665

24 2-1/4 6-1/16 22-5/8 719 1004

1. Face-to-face dimensions are in compliance with MSS SP68 and API 609

specifications.

2. Minimum I.D. is the minimum pipe or flange I.D. required for disc swing

clearance.

CAUTION

The Type A31A Cryogenic valve is

designed for use with the appropriate

piping schedule for the specified ANSI

class. Minimum inside diameters for

flanges or pipe mating with valves are

shown in tables 2 and 3. Be certain to

align the valve accurately to avoid

contact between the disc and the

flanges. Improper alignment or

insufficient space for disc rotation

could result in damage to the disc.

Additionally, be certain that the valve

body and any adjacent pipelines are

free of foreign material, such as pipe

scale or welding slag that could

damage the valve seating surfaces.

Table 3. Valve Body Data, Class 300

VALVE

SIZE,

INCHES

SHAFT

DIAMETER

AT YOKE

BEARING

FACE-TO-

FACE

DIMEN-

SION

(1)

MINIMUM

I.D

.(2)

APPROXIMATE

WEIGHT

Wafer

Single

Flange

mm Kilograms

3 16 47.6 71.4 12 16

4 19 54.0 93.7 21 24

6 25 57.2 146.1 24 28

8 32 73.0 186.2 47 52

10 38 85.3 230.1 80 100

12 44 94.1 281.7 103 135

14 44 117 305 142 249

16 44 133 349 213 325

18 57 149 391 259 434

20 70 159 442 401 582

24 70 181 523 512 863

Inches Pounds

3 5/8 1-7/8 2.82 27 35

4 3/4 2-1/8 3.69 46 52

6 1 2-1/4 5.75 53 61

8 1-1/4 2-7/8 7.32 104 115

10 1-1/2 3-23/64 9.06 176 220

12 1-3/4 3-45/64 11.09 227 298

14 1-3/4 4-5/8 12 314 548

16 1-3/4 5-1/4 13-3/4 470 716

18 2-1/4 5-7/8 15-3/8 570 956

20 2-3/4 6-1/4 17-13/32 884 1282

24 2-3/4 7-1/8 20-19/32 1128 1903

1. Face-to-face dimensions are in compliance with MSS SP68 and API 609

specifications.

2. Minimum I.D. is the minimum pipe or flange I.D. required for disc swing

clearance.

3. Select the appropriate gaskets for the application.

Flat sheet, spiral wound, or other gasket types,

made to ANSI B16.5 group or user’s standard, can

be used on the valves depending on the service

conditions of the application.

4. Refer to table 4 for the quantity and size of flange

bolts required.

Installing Wafer-Style Valves

WARNING

The edges of a rotating valve disc have

a shearing effect that may result in

personal injury. To avoid personal

injury, keep clear of the disc edges

when rotating the disc.

1. See figure 3 for recommended valve orientation.

See table 4 for flange bolt specifications. Install the

lower flange bolts first to form a cradle for the valve.

1 2 3 4 5 6 7 8 9 10 ... 23 24

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