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Drill-stem subs
In all sizes
Design Specifications
Operating Parameters








Float valve sub is a special tool to prevent the blow out. It is available with plate type float valve sub and arrow type float valve sub.



型号 Type


阀直径 D (mm

阀槽直径 DFR +0.4

) 0

(mm)


阀长度 Lfv ( 参考)

浮阀接头内螺纹

其它连接

螺纹 Connection

阀槽长度

LR±1.6

(mm)

螺纹 Connection

阀槽长度 LR±1.6

(mm)

1R

42.1

42.9

149.2

2-3/8REG

231.8

NC23

231.8

1F-2R

48.4

49.2

158.8

2-7/8 REG

254.0

NC26

241.3

2F-3R

61.1

61.9

165.1

3-1/2 REG

266.7

NC31

260.4

3F

71.4

72.2

254.0

-

-

3-1/2FH

355.6

3-1/2F

79.4

80.2

254.0

-

-

NC38

362.0

4R

88.1

88.9

211.1

4-1/2 REG

325.4

NC44

331.8

4F

92.9

93.7

304.8

-

-

NC46

425.4

5R

98.4

99.2

247.6

5-1/2 REG

374.6

NC50

368.3

5F-6R

121.4

122.2

298.4

6-5/8 REG

431.8

5-1/2IF

431.8

5F-6R

121.4

122.2

298.4

7-5/8 REG

438.2

5-1/2FH

431.8

5F-6R

121.4

122.2

298.4

8-5/8 REG

441.3

NC61

444.5

6F

144.5

145.2

371.5

8-5/8 REG

514.4

6-5/8IF

504.8


Download PDF :
In all sizes

Note: When ordering or requesting quotation, if size other than above specifications, please specify clearly.



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