Rapid Delivery for High Pressure Rubber Coupling - A-6 ~Control Units – Lide

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A control unit assembly is a system of two or more control rods placed across an expansion joint from flange to flange to minimize possible damage to the expansion joint caused by excessive motion of the pipeline. The control rod assemblies are set at the maximum allowable expansion and/or contraction of the joint and will absorb the static pressure thrust developed at the expansion joint. When used in this manner, they are an additional safety factor, minimizing possible failure of the expansion joint and possible damage to the equipment. Control units will adequately protect the joints, but the user should be sure that the pipe flange strength is sufficient to withstand total force that will be encountered.

Control units must be used when it is not feasible in a given structure to provide adequate anchors in the proper location. In such cases, the static pressure thrust on the system will cause the expansion joint to extend to the limit set by the control rods which will then preclude the possibility of further motion that would over-elongate the joint. Despite the limiting action that control rods have on the joint, they must be used when proper anchoring cannot be provided. It cannot be emphasized too strongly that rubber expansion joints, by virtue of their function, are not designed to take end thrusts and, in all cases where such are likely to occur, proper anchoring is essential. If this fact is ignored, premature failure of the expansion joint is a forgone conclusion.

1

Outside Nuts

2

Inside Nuts

3

Rubber Washer

4

Metal Washer

5

Control Rod

6

Control Plate

7

Compression Sleeve

8

E.J.Flange

9

Mating Flange

10

Flange Bolt and Nut

Control Units

 

Nominal Pipe Size

Maximum Control Rod Plate O.D.

Maximum Red Diameter

Maximum Control Plate Thickness

maximum Tester Surge Pressure Of the System                     (test pressure is 1.5 times of the working pressure)

       

Number Of Control Rods Recommended

Inches

2

3

4

6

8

1

8.375

1/2

7/16

949

       

11/4

9.75

1/2

7/16

830

       

11/2

9.875

1/2

7/16

510

       

2

11.25

5/8

7/16

661

       

21/2

12.25

5/8

7/16

529

       

3

13.25

5/8

7/16

441

       

31/2

12.625

5/8

7/16

365

547

729

   

4

13.5

5/5

7/16

311

467

622

   

5

14.5

5/5

7/16

235

353

470

   

6

15.5

5/8

7/16

186

278

371

   

8

19.125

3/4

7/16

163

244

326

   

10

21.625

7/8

3/4

163

244

325

488

 

12

24.625

1

3/4

160

240

320

481

 

14

26.625

1

3/4

112

167

223

335

 

16

30.125

1-1/8

3/4

113

170

227

340

453

18

31.625

1-1/8

3/4

94

141

187

181

375

20

34.125

1-1/8

3/4

79

118

158

236

315

22

36.125

1-1/4

1

85

128

171

256

342

24

38.625

1-1/4

1

74

110

147

221

294

26

40.825

1-1/4

1

62

93

124

186

248

28

44.125

1-3/8

1.25

65

98

130

195

261

30

46.375

1-1/2

1.25

70

105

141

211

281

32

49.375

1-1/2

1.25

63

94

125

188

251

34

51.375

1-5/8

1.5

72

107

143

215

286

36

53.625

1-3/4

1.5

69

103

138

207

276

Maximum Pressure For Unanchored Control Units

Test -Design-Surge-Operating

Nominal pipe Size

Style

 

SA,ST,STF,SA,WAF

DA

1-4″

175

130

5-10″

130

130

12-14″

85

85

16-24″

40

40

26-30″

30

30

Recommended rod units in sizes:

1″-8″

2 rods

10″-14″

3 rods

16″-24″

4 rods


Product detail pictures:

Rapid Delivery for High Pressure Rubber Coupling - A-6 ~Control Units – Lide detail pictures

Rapid Delivery for High Pressure Rubber Coupling - A-6 ~Control Units – Lide detail pictures

Rapid Delivery for High Pressure Rubber Coupling - A-6 ~Control Units – Lide detail pictures

Rapid Delivery for High Pressure Rubber Coupling - A-6 ~Control Units – Lide detail pictures

Rapid Delivery for High Pressure Rubber Coupling - A-6 ~Control Units – Lide detail pictures


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