30d01y R Self Operated After Valve Pressure Control - China

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 ( 304L)

Soft seal Stainless steel embedded with rubber ring

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

Actuator

Effective area ( cm2) 32 ※ 80 250 630

Pressure setting range 0.8~1.6

0.3~1.2 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 ≥ 0.05 ≥ 0.04 ≥ 0.01 ≥ 0.005

Allowable maximum differential pressure between the upper a nd lower diaphragm chambers 2.0 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 Φ 10X 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 6 Diaphragm

7 Spring 8 Adjusting nut 9 Pressure pipe 10 Bellows 11 Balanced diaphragm 12 Charging 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 when 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, P2 is input to the lower 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 after- valve pressure.

When the after- valve pressure P2 increases, the acting force of P2 that actson the top disc w ill 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 close towards 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 reduced, the flow resistance becomes higher and P2 is reduced to the set value.

Likewise, when the after- valve pressure P2 decreases, the acting direction is reverse to the above.

This is the working principle during the control of after- valve pressure.

When it is necessary to change the set value of after- valve pressure P2, 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

Company Contact:

• Posted By: control valve

• Phone: 02152805855

• Address: Dong'ou Industrial Zone, Oubei Town, Wenzhou City,, wenzhou , China

• Email:

• Website: http://www.reowo.com

• Business Description: Zhejiang REOWO Automatic Instrument Co., Ltd. was established in 2003,
  
  specialized in designing and manufacturing control valves for more than
  
  10 years, provided high quality solutions and products in such
  
  industries as petroleum, chemical industry, electric power, metallurgy
  
  for process control systems.
  
  Reowo headquarters is located in Dong ou industrial zone, Wenzhou of Zhejiang .
  
  We have a modern production base, professional research and development, technology and service team and various advanced equipment needed for manufacturing and inspection .
  
  We have obtained ISO9001 certification, ISO4001, CE certification , API certification, TS manufacturing license, etc .
  
  We have been granted many technology patents.
  
  Nowadays, our products are exported to many countries.
  
  Our products are popular all over the world .
  
  With REOWO development, We will help more customers in the industrial automation control system, to provide them the best service and high quality products.