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The 30D03Y/30D03R self-operated differential pressure control

Place of Origin: Wenzhou,Zhejiang,China
ZhejiangREOWOAutomaticInstrumentCo.,Ltd
Phone:   +86 18939876995
Fax:   +86 86-52805855
Mobile:   +86 86-52805855
• pressure balance (bellows or balanced diaphragm)structure design, high sensitivity, high accuracy, good stability, wide adjusting range • low noise

The 30D03Y/30D03R self-operated differential pressure control

Summary

The30D03Y/30D03Rself-operated differential pressure control valve is composed of the control valve ,actuator and a spring used for pressure setting。It is suitable for controling differential pressure in the pipes of non-corrosive liquids, gases and steams. when the valve is closed

The main features are as follows:

1.It has the pressure balancing function with high sensitivity.

2.Low noise, reliable performance, free of maintenance

3.The standard modular design is adopted.

4.Various combined controls can be carried out through the assemblies.

Body

DN

15、20、25、32、40、50、65、80、100、125、150、200、250mm

PN

Class150、300

Flange standard

ANSI、JIS、DIN GB JB(special standards can be offered according to user requirements)

Body material

WCB、CF8、CF3、CF8M、CF3M

Plug material

Hard seal

Stainless steel (304、316、316L)

Soft seal

Stainless steel embedded with rubber ring

Pressure balancing

Stainless steel bellows (DN15~125), balanced diaphragm (DN150~250)

Actuator

Effective area (cm2)

80

250

630

Pressure setting range

0.1~0.6

0.05~0.3

0.015~0.15

0.01~0.07

0.005~0.035

Minimum differential pressure that ensures normal work of the pressure valve

≥0.04

≥0.01

≥0.005

Allowable maximum differential pressure between the upper a nd lower diaphragm chambers

1.25

0.4

0.15

Material

Diaphragm cover: galvanized steel sheet;

Diaphragm: EPDM or FKM with fiber

Control pipeline connection

Copper pipe or steel pipe Φ10X 1(mm);

Ferrule connection: R1/4"

Note:  ※The pressure setting range corresponding to the effective area does not apply to valves with DN150-250.

Performance

Set value error

±8%

Allowable leakage (under stipulated testing conditions) 

Hard seal

4×0.01% valve rated capacity

Soft seal

DN15~50

DN65-DN125

DN150~250

10 bubbles/ min

20 bubbles/min

40 bubbles/min

Structural figure

1Body

2Seat

3 Valve shaft

4 Bonnet

5 Diaphragm cover

6 Diaphragm

7 Spring

8 Adjusting nut

9 Bellows

10Balanced diaphragm

11Charging valve

 

Allowable working temperature

DN

15~125mm

150~250mm

seal type

  Hard seal

≤150℃                           

≤140℃

Cooling tank≤200℃

Cooling tank and extension ≤200℃

Cooling tan k and heat sink ≤350℃※            

Cooling tank and extension ≤300℃※

Soft seal

≤150℃

Note: ※It indicates the allowable working temperature is valid only when the medium is steam

and the body with PN40 shall be adopted w hen the temperature resistance is 350℃.

Rated flow coefficient, noise measuring coefficient, allowable differential pressure

DN

15

20

25

32

40

50

65

80

100

125

150

200

250

Rated flow coefficient

4

6.3

8

16

20

32

50

80

125

160

280

320

450

Noise measuring coefficient Z value

0.6

0.6

0.6

0.55

0.55

0.5

0.5

0.45

0.4

0.35

0.3

0.2

0.2

Allowable differential

PN16

1.6

1.5

1.2

1

pressure (Mpa)

PN40

2

Working principle

After throttling by the plug and seat, the before-valve pressure P1 of the process medium is changed into the after-valve pressure P2. Through the control pipeline, P1 is input to the upper diaphragm chamber of the actuator and acts on the top disc.

The acting force produced balances the reacting force of the spring, determining relative positions of the plug and seat and controlling the before-valve pressure. W hen the before-valve pressure P1 increases, the acting force of P1 that acts on the top disc will increase accordingly.

At the time, the acting force on the top disc is higher than the reacting force of the spring to make the plug move away from the seat, until the acting force on the top disc balances the reacting force of the spring. At the time, the flow area between the plug and seat is increased, the flow resistance becomes lower and P1 is reduced to the set value. Likewise, when the before-valve pressure P1 decreases, the acting direction is reverse to the above. This is the working principle during the control of before-valve pressure.

When it is necessary to change the set value of before-valve pressure P1, please adjust the adjusting nut.

I. Dimensions and weight of control valve

DN (mm)

15

20

25

32

40

50

65

80

100

125

150

200

250

L  (mm)

130

150

160

180

200

230

290

310

350

400

480

600

730

B  (mm)

212

212

238

238

240

240

275

275

380

380

326

354

404

Weight (Kg)

6.2

6.7

9.7

13

14

17

29

33

60

70

80

140

220

B1(mm)

630

855

1205

Weigh(Kg) 

140

210

300

II. Dimensions and weight of actuator

Effective area (cm ) 

32

80

250

630

R   (mm)

172

172

263

380

H   (mm)

435

430

470

520

Weight(Kg) 

7.5

7.5

13

28

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FOB Price: 50.00 - 80.00 THB
Standard
Level 1 Saller
Address: 609ROOM,2#Yinghua International Plaza, Guangfu Road, Putuo District, Shanghai, 200333 China
Phone:   +86 18939876995
Fax:   +86 86-52805855
Mobile:   +86 86-52805855
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