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Factory Cheap bronze threaded ball valve - MSS SP-71 Cast iron Swing Check Valve – BESTFLOW

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Factory Cheap bronze threaded ball valve - MSS SP-71 Cast iron Swing Check Valve – BESTFLOW Detail:

Description

TECHNICAL REQUIREMENT :
● Design and Manufacture  Conform to MSS SP-71
● Flange dimensions  Conform to ASME B16.1
● Face to Face  dimensions Conform to ASME B16.10
● Testing Conform to  MSS SP-71

Specification

No.

Part Name

Material

product

1

BODY

ASTM A126 B

2

SEAT RING

ASTM B62 C83600

3

DISC

ASTM A126 B

4

DISC RING

ASTM B62 C83600

5

HINGE

ASTM A536 65-45-12

6

STEM

ASTM A276 410

7

BONNET

ASTM A126 B

NOTE: Above 6 inch have eyebolt

m to  MSS SP-71

Dimensions data(mm)

NPS

2″

3

4

5

6

8

10

12

14

16

18

20

24

Dn

51

63.5

76

102

127

152

203

254

305

356

406

457

508

610

L

203.2

215.9

241.3

292.1

330.2

355.6

495.3

622.3

698.5

787.4

914.4

965

1016

1219

D

152

178

191

229

254

279

343

406

483

533

597

635

699

813

D1

120.7

139.7

152.4

190.5

215.9

241.3

298.5

362

431.8

476.3

539.8

577.9

635

749.3

b

15.8

17.5

19

23.9

23.9

25.4

28.5

30.2

31.8

35

36.6

39.6

42.9

47.8

n-d

4-19

4-19

4-19

8-19

8-22

8-22

8-22

12-25

12-25

12-29

16-29

16-32

20-32

20-35

H

124

129

153

170

196

259

332

383

425

450

512

702

755

856

Installation of Check Valve

The check valve must be installed at the outlet of the pump and in front of the outlet control valve for maintenance. Generally, the first outlet of the pump is soft connection (shock absorber), followed by check valve, and then block valve (such as butterfly valve, gate valve, stop valve, etc.).
1. Install the check valve first and then the gate valve or butterfly valve
Advantages: it can protect the check valve, especially in parallel pumps. When one pump does not start and the other pump starts, the impact force is borne by the gate valve or butterfly valve
Disadvantages: who will protect gate valve or check valve? There was a case that the valve plate of the butterfly valve was broken.
2. Install gate valve or butterfly valve before check valve
Advantages: it can protect butterfly valve or gate valve, and the impact force is borne by the check valve
Disadvantages: who will protect the check valve? The check valve is opened and closed by pressure difference. If the header pressure is high, it will be closed and the pump pressure will be opened. If the flow used is unstable, the check valve will be opened and closed repeatedly, which will affect the service life of the check valve.


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Factory Cheap bronze threaded ball valve - MSS SP-71 Cast iron Swing Check Valve – BESTFLOW detail pictures


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