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SADKMulti function axial flow control valve

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    Sadk multi-functional axial flow control valve has the advantages of simple structure, large flow coefficient, small dynamic load bearing capacity, and can be used for any water head. It can be arranged horizontally, vertically and obliquely. It is widely used for flow control of bypass, reservoir discharge or continuous discharge, especially for discharge of downstream environmental protection flow and supplement of downstream river flow in dry season. The valve is an important equipment in the modernization of water conservancy and hydropower projects.

Product overview

-、preface                          

Multifunctional axial flow control valve, also known as piston valve, is a new product of Zui developed by our company on the basis of absorbing foreign technology. It has many functions, such as flow control, decompression and pressure stabilization control, pressure relief and pressure holding control, venting and energy dissipation. The valve has the advantages of novel structure, advanced performance, reliable operation and wide application

It can be used in various water supply and drainage systems of water conservancy and hydropower, metallurgy, petrochemical, water department, municipal administration, environmental protection and other industries, as well as oil and gas medium systems. (hereinafter referred to as control valve)

1、 Decompression / stabilization: the pressure reduction range is large, and the single-stage valve can be reduced from 10 Ma to 0.1 ma. And the valve operation without noise, cavitation. In the systems of high-pressure artesian water supply, high-pressure head hydropower station, deep mine, etc., water is taken from the pressure pipe, and the water can be supplied to the low-pressure manual system after one-stage decompression of the valve

2、 Pressure relief / pressure holding: through upstream pressure sensing control and automatic valve opening and closing by electric device, the flow and pressure can be adjusted in a wide range, which can be used as the bypass discharge valve of large pump station and hydro generator unit. It also has no noise and cavitation performance.

3、 Flow control and cut-off: during the stroke from full open to full close, the valve flow system has a linear relationship with the valve opening. Even in the stroke from full close to 10% opening, it still has good flow regulation performance. Accurate flow regulation can be realized through downstream flowmeter or manual control. At the same time, the valve has cut-off function and excellent sealing effect

4、 Venting and energy dissipation: the valve can be directly installed with the port of high-pressure pipe network as an energy dissipation and discharge valve. When water flows through the valve, it collides with each other and diffuses and ejects at a wide cone angle. It decomposes and dilutes through the impedance of the air, so as to dissipate the impact capacity and protect the downstream facilities. The beam hood can be added to effectively control the jet direction

working principle

The sleeve is placed on the inner cavity of the valve body and guided by the guide rail. The water flows from the outside of the guide device and forms multiple streams of water through the jet hole on the deflector, which produces collision in the middle chamber of the valve body to achieve the effect of energy dissipation. The throttling occurs between the sleeve edge and the orifice of the deflector. Due to the high flow velocity in the hole, the material selected for the deflector is highly wear-resistant and corrosion-resistant. At the same time, due to the collision, the middle chamber of the valve channel is effectively reduced The influence of cavitation and erosion on valve body can improve the service life of valve. The main seal ring is located at the front end of Zui of the deflector, and the sleeve is guided in the full stroke. When it is pushed through the main seal ring to the fully closed position, the differential pressure between the front and rear of the valve forces the main seal ring to be close to the outer wall of the sleeve to realize the truncation. The sleeve moves back and forth in the cavity of the valve body through the guide of the connecting rod, and the valve rod is driven by the crank and connecting rod. When the actuator drives the valve stem to rotate against the clock, the sleeve moves backward to open the valve; when the actuator drives the valve stem to rotate clockwise, the sleeve moves forward to close the valve。

                     Fig. 4 Schematic diagram of valve energy dissipation

Performance guarantee value

technical parameter1MPa=10kgf/cm2)

project parameter

Nominal pressure(MPa)

0.6-6.3MPa

Leakage

accord withGB/T13927Standard regulations

Applicable temperature(℃)

-29~120℃

Applicable media Water, air, natural gas, gas, etc

Parameter summary table of multi function axial flow control valve

Serial number item parameter remarks
One Valve name control valve Can be equipped with control box
(decompression / relief / flow regulation)
Two Nominal pressure

PN

Three  

1.5PN

Four Sealing test pressure

1.1PN

7

Set pressure
(H / relief condition)
Nominal pressure Adjustment range It can be set according to the working conditions
 

0.05-0.9 MPa

1.6 MPa

0.05-1.4 MPa

2.5 MPa

0.05 -2.3 MPa

4.0 MPa

01-3.8 MPa

6.3 MPa

0.1-6.0 MPa


  

structure characteristics

Multi function axial flow control valve is composed of valve body, stem, crank and sleeve. The deflector made of stainless steel is fixed in the middle chamber of the valve body. The deflector has guide groove type, guide vane type and spray hole type. The sleeve looper is in the valve body cavity and connected with the valve stem. The position of the sleeve is controlled by the external control parts to adjust the flow area of the valve. The external control components can be manual, electric, pneumatic and hydraulic according to the working conditions.

Fig. 2 guide vane type
The multi-functional axial flow control valve has the following four main forms, and its structure and application range are as follows:

1、Plunger type structure can be widely used in water, oil and gas systems, with simple structure, reliable operation, small head loss, and low requirements for medium cleanliness, which is the common form of Zui.

2、 Guide vane type is suitable for large pressure difference, gas-liquid mixing and other working conditions, stable operation and low cavitation.

3、 The structure of diversion groove has superior regulation performance, which can be used in high pressure differential system and working conditions with suspended particles and other impurities, and has good cavitation resistance.

4、The results show that the spray hole structure has good adjustability and the effect of flow regulation and pressure reduction for clean media under ultra-high pressure difference condition is excellent. 

product mix

Fig. 1 valve structure diagram

Component material
Serial number name Material Science   Serial number name Material Science

1

valve body

Ductile ironQT450-10 /Cast steel WCB / stainless steel

 

10

rings

35#

2

crank Stainless copper 2Crl3  

11

Plug  

3

Drive shaft Stainless steel 2Crl3  

12

Executive Agency Handwheel / intelligent electric installation

4

  connecting rod Stainless steel 2Crl3      13   Stainless steel 2Crl3

5

Sleeve Stainless steel 304 / 316  

14

Sealing element Butadiene rubber

6

Sleeve gland Stainless steel 2Crl3  

15

Sleeve guide Aluminum bronze zcuall0fe3

7

a fastening Stainless steel A2-70  

16

Ink seal Butadiene rubber

8

Crankshaft support Stainless steel 2Crl3  

17

Drive pin shaft  

9

Drive bearing    

 

 

 

Performance characteristics

Axial symmetrical flow passage: the valve body adopts axial symmetrical flow passage, and the medium flows into the valve through streamline inner cavity. The shape of flow passage at any position in the valve is circular. Compared with the traditional valve, the flow channel of sleeve valve is smooth, and the fluid has no sharp turning under any opening, which avoids unnecessary change of flow direction, significantly reduces noise and turbulence trend, and reduces valve cavitation.

Pressure balance: because the multi-functional axial flow control valve adopts pressure balance sleeve, the axial force of operating sleeve has nothing to do with the pressure difference at both ends of the valve, so the purpose of quick action can be achieved by using smaller actuator (the opening and closing torque is only 1 / 3-1 / 5 of that of ordinary gate valve, butterfly valve and other transmission valves).

Good regulation effect: almost digital control, through changing the number of flow holes to achieve the change of flow area, with good linear regulation characteristics.

Electric control system

1、The pressure sensor outputs 4-20mA DC signal to calibrate the small pressure value of Zui and the large pressure value of Zui.

2、The output feedback signal of pressure sensor is sent to PLC for processing. After comparing the preset values of PLC, the corresponding control signal is output to the electric actuator, and the valve is driven to the corresponding position (valve opening).

3、 PLC is responsible for opening reservation, feedback signal comparison and control; output work, the electric actuator is responsible for driving the valve to the specified position according to the PLC command, the control precision is set by PLC, this method is closed-loop control, stable and reliable.

4、The electric actuator adopts intelligent type, which has many functions such as stroke protection, torque protection, phase failure alarm, etc.

structure size

Dimension and connection dimension table of pn1.0-pn2.5mpa multifunctional axial flow control valve

nominal
Diameter
Overall dimension (standard value) Connection size (standard value)

PN1.0 MPa

PN1.6 MPa

PN2.5 MPa

L

B

H

H1

D

D1

n-Фd

b

D

D1

n-Фd

b

D

D1

n-Фd

b

100

325

210

160

80

220

180

8-Ф18

22

220

180

8-Ф18

22

235

190

8-Ф22

24

125

325

240

190

100

250

210

8-Ф18

22

250

210

8-Ф18

22

270

220

8-Ф26

26

150

350

290

220

150

285

240

8-Ф22

24

285

240

8-Ф22

24

300

250

8-Ф26

28

200

400

330

310

190

340

295

8-Ф22

24

340

295

12-Ф22

24

360

310

12-Ф26

30

250

500

330

395

230

395

350

12-Ф22

26

405

355

12-Ф26

26

425

370

12-Ф30

32

300

600

420

460

260

445

400

12-Ф22

26

460

410

12-Ф26

28

485

430

16-Ф30

34

350

700

510

490

300

505

460

16-Ф22

26

520

470

16-Ф26

30

555

490

16-Ф33

38

400

800

655

520

335

565

515

16-Ф26

26

580

525

16-Ф30

32

620

550

16-Ф36

40

450

900

750

580

345

615

565

20-Ф26

28

640

585

20-Ф30

40

670

600

20-Ф36

46

500

1050

820

640

385

670

620

20-Ф26

28

715

650

20-Ф33

44

730

660

20-Ф36

48

600

1175

970

730

460

780

725

20-Ф30

34

840

770

20-Ф36

54

845

770

20-Ф39

58

700

1320

1050

850

500

895

840

24-Ф30

34

910

840

24-Ф36

40

960

875

24-Ф42

50

800

1480

1215

1020

600

1015

950

24-Ф33

36

1025

950

24-Ф39

42

1085

990

24-Ф48

54

900

1700

1350

1270

700

1115

1050

28-Ф33

38

1125

1050

28-Ф39

44

1185

1090

28-Ф48

58

1000

1900

1560

1390

800

1230

1160

28-Ф33

38

1255

1170

28-Ф42

46

1320

1210

28-Ф55

62

1200

2100

1750

1510

900

1455

1380

32-Ф39

44

1485

1390

32-Ф48

52

1530

1420

32-Ф55

70

1400

2420

2100

1625

1000

1675

1590

36-Ф42

48

1685

1590

36-Ф48

58

1755

1640

36-Ф60

76

1600

2700

2435

1920

1200

1915

1820

40-Ф48

52

1930

1820

40-Ф55

64

1975

1860

40-Ф60

84

1800

3070

2670

2110

1400

2115

2020

44-Ф48

56

2130

2020

44-Ф55

68

 

 

 

 

2000

3250

1980

2310

1600

2325

2230

48-Ф48

60

2345

2230

48-Ф60

70

 

 

 

 

Physical display

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