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pilot-operated pressure control valve
Product Images
Product Property
| Product Status : | New |
| Sample Available : | yes |
| Shipment Terms : | fob,cfr,cif,Negotiable |
| Payment Mode : |
T/T,L/C,WesternUnion |
Description
The30L01Y/R self-operated flow control valve
Summary
The30L01Y30L01R self-operated flow control valve is composed of the control valve provided with flow setting and actuator.
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.The flow is adjusted according to the
standard figure by the throttle valve, which is convenient and fast.
5.Various combined controls can be carried out through the assemblies.
Technical parameters and performances
Body
| DN | DN15、20、25、32、40、50、65、80、100、125、150、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 | 630 |
| Differential pressure of throttle | 0.02 0.05 | |
| Allowable maximum differential pressure between the upper and lower diaphragm chambers | 0.4 | 0.15 |
| 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" |
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
| 1 Flow restrictor | 2 Body | 3 Seat | 4 Valve shaft | 5 Bonnet |
| 6 Bellows | 7 Diaphragm Cover | 8 Diaphragm | 9 Charging valve |
|
Allowable working temperature
| DN | 15~125mm | 150~250mm | |
| seal type | Hard seal | ≤150℃ | ≤140℃ |
| Two Cooling tank≤200℃ | Two Cooling tank and extension ≤200℃ | ||
| Soft seal | ≤150℃ |
Note: The differential pressure of throttle in the flow valve includes two types such as 0.02MPa and 0.05MPa, which shall be selected according to the actual situations. The differential pressure before and after the valve shall be higher than that of the throttle.
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 | 400 | |
| Throttle pressure differential | 0.02MPa | 0.1-2 | 0.2-3 | 0.2-4 | 0.4-7 | 0.6-11 | 0.8-16 | 3- 28 | 4- 40 | 6- 63 | 8- 80 | 12-125 | 15-150 | 18-180 |
| 0.05MPa | 0.2-3 | 0.3-4.5 | 0.3-6 | 0.5-10 | 0.8-16 | 1.1-24 | 4 - 40 | 6-58 | 9- 90 | 12-120 | 18-180 | 22-220 | 25-250 | |
| 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 |
Note: The differential pressure of throttle in the flow valve includes two types such as 0.02MPa and 0.05MPa, which shall be selected according to the actual situations. The differentia l pressure before and after the valve shall be higher than that of the throttle.
Working principle
After the controlled medium enters the valve, the before-valve pressure P1 is input into the lower diaphragm chamber through the control pipeline, and the pressure Ps after throttling by the throttle valve is input into the upper diaphragm mchamber. The difference between P1 and Ps △Ps=P1-Ps is called effective pressure. The difference between the thrust producedon the diaphragm by P1 and the thrust produced on the diaphragm by Ps determines relative positions of the plug and seat and determines the flow that passes through the valve. When the flow that passes through the valve increases, i.e. △Ps increases, P1 and Ps respectively acts on the lower diaphragm chamber and upper diaphragm chamber to make the plug move towards the seat,
so that the flow area between the plug and seat is changed and Ps is increased . The thrustacted on the diaphragm by the increased Ps, the reacting force of the spring and the thrust acted on the diaphragm by P1reaches balance at the new position to realize the purpose of controlling f low, and vice versa. The flow of the controlled medium is determined through adjusting relative positions of the throttle valve and seat.
Calibration chart: To set the flow more accurately and quickly, the following calibration charts are offered for you reference (please measure the flow with a flow meter if you need to set the flow more precisely or set the flow
for valves with DN150-250).
The calibration chart is only applicable to water, and serves as a reference for other media, whose flow shall be properly adjusted in the actual process..
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 2) | 250 |
| R (mm) | 263 |
| H (mm) | 150 |
| Weight(Kg) | 9 |
