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30D01Y/R SELF-OPERATED (AFTER-VALVE) PRESSURE CONTROL VALVE
Kategori : Kontrollgeräte
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300 series control valve characteristics
• pressure balance (bellows or balanced diaphragm)structure design, high sensitivity, high accuracy, good stability, wide adjusting range
• low noise, maintenance free, energy saving and environmental protection
• standard modular design
• by assembly can be combination of control
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Summary
TheV230D01/V231D01self-operated (after-valve) pressure control valve is Composed of the control valve, actuator And a spring used for pressure setting. It is suitable for controlling after-valve Pressure in the pipes of non-corrosive liquids, gases and steams. When the after-valve pressure rises, the control 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) 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 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 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
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