user login

pilot-operated (before valve) pressure control valve

50.0~100.0 USD
Min. Order: 1 Piece/Pieces
Payment Terms: L/C, D/P, D/A, T/T, WU
Supply Ability: 50-100 each month
Place of Origin: Zhejiang

Company Profile

Location: Shaoxing, Zhejiang, China (Mainland)
Business Type: Manufacturer, Trading Company
Main Products: Pressure Single Seat Control Valve, Penumatic Linear Control Valve, Pneumatic Control Butterfly Valve, Pneumatic Cage Type Regulating Valve, Self Acting Control Valve

Product Detail

Model No.: TISUN BPPCV
Means of Transport: Ocean, Air, Land
Power: Others
Standard or Nonstandard: Standard
Pressure: Others
Structure: Ball
Material: Stainless Steel
Temperature of Media: Others
Media: Others
Brand Name: TISUN
functions:: for control
Exp Region:: America, Europea, east asia
Production Capacity: 50-100 each month
Packing: WODDEN CATTON
Delivery Date: as per the quantity
Show

Product Description

 pilot-operated (before valve) pressure control valve is composed of the

control valve ,pilot and actuator. It is suitable for controling differential pressure in the pipes of

non-crrosive   liquids, gases and steams. when the diferential pressure rises, the control valve is

opened 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.High control precision                                                               

Technical parameters and performances

  Body

DN 

DN15    20     25  32   40     50   65   80     100    125   200     250mm

PN

PN1.6   4 .0MPa

Flange   standard

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

Body   material

Cast iron (HT200),   cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2T   i)

Plug   material

Hard seal

Stainless steel   (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti)

Soft seal

Stainless steel   embedded with rubber ring

Pressure

 balancing

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

 

                                                                                                                                                                                                                                                                                            Actuator

Effective   area (cm2)

250

Pressure   setting range

0.01~0.12  0.08~0.25     0.2~0.5  0.45~1  0.6~2.0

Minimum   differential pressure that ensures normal work of the pressure valve

DN15~125is 0.08     DN150~250is 0.1

Allowable   maximum differential pressure between the upper and lower diaphragm chambers

0.4

Material

galvanized steel   sheet; diaphragm: EPDM or FKM with fiber

Control   pipeline connection

  Copper pipe o r steel pipe Φ10X 1(mm); ferrule   connect ion: R1/4"

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

   

 Performance

Set value error 

  ±4%

Allowable leakage   (under stipulated testing conditions) 

Hard seal             

 4x0.01% valve rated capacity

Soft seal

DN15~50     DN65-DN625         DN150~250

10 bubbles/ min    20 bubbles/min    40 bubbles/min

 

   Set value error                                             ±4%

Allowable leakage   Hard seal                   4x0.01% valve rated capacity

 (under stipulated             DN15~50             DN65~125          DN150~250

 testing conditions)   Soft seal 10 bubbles/min      20 bubbles/min       40 bubbles/min

 

Structural figure

1Body

2Seat

3 Stem

4 Before-valve   pressure P1 pipe

5 Balanced   bellows 

6Travel indicator

7 Diaphragm

 8    Spring

9 Operating pressure   Ps pipe

10 After-valve   pressure P2 pip

11  Pilot

 12     Pilot plug

  13Spring

 14 Bellows

15 Adjusting screw

16 Adjustable needle   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

 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

0.60

0.60

0.60

0.55

0.55

0.50

0.50

0.45

0.40

0.35

0.30

0.20

0.20

Allowable   differential

PN16              

1.60

1.50

1.20

1.00

pressure (Mpa)

PN40

2.00

 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.     

                                   


Post Buying Request