Basic Info.
Product Description
Product Introduction
ZJHP pneumatic flow control valve is a small pneumatic single seat control valve, comprehensive development of advanced technology at home and abroad. The valve body is single seat valve, double seat, sleeve seat. And it is the development direction of today's control valve.
ZJHP pneumatic flow control valve is composed of multi - spring pneumatic diaphragm actuator and top - guided through away low flow resistance single - seat valve. It has the advantages of compact structure, light weight, sensitive action, S-streamline fluid channel, small pressure drop loss, large valve capacity, accurate flow characteristics. It is equipped with electric-air positioner or pneumatic positioner which can realize the automatic regulation and control of the process. The valve is widely used in the precise control of gas, liquid, steam in pressure, flow, temperature, liquid level and other parameters to maintain a given value. If there is no air source at the site, electric actuator could be replaced.
Technical Parameters
| Body type | Straight type casting body |
| Nominal diameter | DN20~300mm |
| Nominal pressure | PN 1.6, 2.5, 4.0, 6.4, 10.0 MPa |
| Flange standard | GB/T9113, JB/T79, HG20594 |
| Connection type | Flange(FF, RF, RTJ), Welding(SW, BW), Screw(suitable in 1") |
| Bonnet type | High temperature type +250~+450ºC, Ultra high temperature type+250~+560ºC |
| Gland type | Bolted compression type |
| Packing | V type PTFE, containing impregnated PTFE asbestos, asbestos textile, graphite |
| Main parameter | Power supply voltage: 220V/50Hz, input signal: 4-20mA or 1-5V·DC, output signal: 4-20mA·DC Protection grade: IP55, flameproof mark: EXDIIBT4, hand function: handle Ambient temperature: -25 ~ +70ºC, ambient humidity: ≤95% |
Base Material
| Valve body, bonnet | HT200, ZG230-450 ZG1Cr18Ni9Ti |
| Valve disc, seat | 1Cr18Ni9Ti, surfacing of Stellite alloy |
| Soft seal disc | reinforced polytetrafluoroethylene |
| Packing | PTFE, flexible graphite |
| Corrugated tube | 1Cr18Ni9Ti |
| Gasket | rubber asbestos board, 10, 1Cr18Ni9Ti, asbestos spiral wound gasket |
| Diaphragm cover | A3 |
| Corrugated diaphragm | nitrile rubber clip reinforced polyester fabric |
| Spring | 60Si2Mn |
| Stem, push rod | 2Cr13, 1Cr18Ni9Ti |
| Bushing | 2Cr13 |
Feature
1. ZJHP pneumatic flow control valve is the implementation unit of the instrument in the automatic control system with electric-gas valve positioner driven by electric signals and compressed air. It accepts the input 0-10mA DC or 4-20mA DC current signal and the compressed air will be converted into air source pressure signal input and output by the regulator. It can realize the division control (segment amplitude signal) to change the valve opening and achieve the precise control of the process parameters.
2. ZJHP pneumatic flow control valve can be divided by direct action and reverse action according to the mode of action. Direct action: Air to closed-Failed to open, when the pressure signal increases, the valve closed. Reverse action: Air to open-Failed to closed, when the pressure signal increases, the valve open.
3. ZJHP pneumatic flow control valve is straight single seat casting valve with single plunger type disc, especially suitable for small leakage and small pressure difference.
4. The control valve is straight through with low flow resistance, top guide and no bottom bonnet. The valve is composed of seat and plug type disc. It has a good sealing, small leakage, quick action, s-shaped streamlined, small pressure drop loss, large capacity, precise flow characteristic, large adjust rang. The guide area of disc is large to strong ant-vibration. It is applicable to strict requirements of the medium leakage and regulation accuracy. Due to the valve structure, the unbalance force on the stem is larger in the big nominal diameter. So the valve is only suitable for the small pressure difference.
5. Different spool shapes will get different flow characteristics such as percentage (logarithmic), linear, quick opening.
6. The valve spool can be designed and made into according to the requirements of working conditions. And the soft sealing structure is suitable for -20~+120ºC temperature requires strict tightness of acid and alkali, gas.
Actuator
| Actuator | ZHA/B Multi-spring diaphragm actuator | ||||
| Model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 |
| Effective area(cm2) | 350 | 350 | 560 | 900 | 1400 |
| Stroke(mm) | 10,16 | 24 | 40 | 40,60 | 100 |
| Spring range(KPa) | 20~10, 20-60, 60-100, 40-200, 80-240 | ||||
| Diaphragm material | Nitrile rubber and nylon cloth, ethylene propylene rubber and nylon cloth | ||||
| Air supply | 140~400KPa | ||||
| Air connetction | RC1/4" | ||||
| Ambient temperature | -30~+70ºC | ||||
| Accessories | Positioner, air filter pressure reducer, position valve, travel switch, valve position transmitter, handwheel mechanism, etc. | ||||
| Acting | Air close(B)-fail to close(FO), air open(K)-fail to close(FC) | ||||
Technical parameters
| DN (mm ) (dn) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | |||||
| (10) | (12) | (15) | (20) | |||||||||||||
| Kv | Liner | 1.8 | 2.8 | 4.4 | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 690 | |
| Percentage | 1.6 | 2.5 | 4.0 | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 160 | 250 | 400 | 630 | ||
| Rated stroke L (mm) | 16 | 25 | 40 | 60 | ||||||||||||
| Diaphragm effective area Ae (cm2 ) | 280 | 400 | 600 | 1000 | ||||||||||||
| Signal range Pr (kPa) | 20 ~ 100 , 40 ~ 200 | |||||||||||||||
| Air pressure Ps (MPa) | 0.14 ~ 0.4 | |||||||||||||||
| Flow characteristics | Straight line, equal percentage | |||||||||||||||
| Adjustable ratio | 50 | |||||||||||||||
| Allowable leakage | Hard sealing: IV soft sealing: VI | |||||||||||||||
| PN(MPa) | 1.0 , 1.6 , 4.0 , 6.4 | |||||||||||||||
| Working temperature t ( ºC ) | Normal | -20 ~ 200 , -40 ~ 250 , -60 ~ 250 | ||||||||||||||
| Cooling | -40 ~ 450 , -60 ~ 450 | |||||||||||||||
| High | 450 ~ 560 | |||||||||||||||
| Low | -60 ~ -100 , -100 ~ -200 , -200 ~ -250 | |||||||||||||||
Performance indicators
| Project | Value | Project | Value | ||||
| Intrinsic error% | No positioner | ±5.0 | Zero deviation % | Air close | No positioner | Beginning | ±5.0 |
| With positioner | ±1.0 | Ending | ±2.5 | ||||
| Hysteresis error% | No positioner | ≤3.0 | With positioner | Beginning | ±1.0 | ||
| Ending | ±1.0 | ||||||
| With positioner | ≤1.0 | Air open | No positioner | Beginning | ±2.5 | ||
| Ending | ±5.0 | ||||||
| Dead band% | No positioner | ≤3.0 | With positioner | Beginning | ±1.0 | ||
| Ending | ±1.0 | ||||||
| With positioner | ≤0.4 | Allowable leakage L/h | 1×10-4×capacity | ||||
| Rated stroke deviation% | ±2.5 | ||||||
Details and dimensions and weight
| DN | L | H | H1 | Weight(kg) | φA | |||||||
| PN16 | PN40 | PN64 | Normal | High T | PN6 | PN16 | PN40 | PN64 | PN6 PN16 | PN40 PN64 | ||
| 20 | 180 | 194 | 206 | 398 | 548 | 45 | 52 | 65 | 19 | 23 | 285 | |
| 25 | 185 | 197 | 210 | 410 | 560 | 50 | 57 | 70 | 20 | 24 | ||
| 40 | 222 | 235 | 251 | 455 | 620 | 65 | 75 | 85 | 26 | 35 | ||
| 50 | 254 | 267 | 286 | 457 | 627 | 70 | 82 | 90 | 30 | 40 | ||
| 65 | 276 | 292 | 311 | 610 | 790 | 80 | 92 | 100 | 47 | 66 | 360 | |
| 80 | 298 | 317 | 337 | 622 | 807 | 95 | 100 | 107 | 55 | 78 | ||
| 100 | 352 | 368 | 394 | 640 | 850 | 105 | 110 | 117 | 125 | 65 | 99 | |
| 150 | 451 | 473 | 508 | 870 | 1130 | 132 | 142 | 150 | 172 | 130 | 160 | 470 |
| 200 | 600 | 650 | 890 | 1150 | 160 | 170 | 187 | 207 | 175 | 250 | ||
| 250 | 730 | 775 | 1203 | 1523 | 187 | 202 | 225 | 235 | 350 | 470 | 580 | |
| 300 | 850 | 900 | 1234 | 1554 | 220 | 230 | 257 | 265 | 500 | 660 | ||
Connection dimensions and standards
Flange standard: Cast iron is GB4216-86 Cast steel is GB9113-88, JB/T79-94
Flange seal standard: PN10, PN16 is RF, PN40,PN64 is FM, the body is M
Structural length standard: GB12221-89
Connection of actuator air signal: Internal thread M10×1
The flange and distance of flange end face can be manufactured according to the standard specified by the user. Such as ANSI, JIS, DIN standard.
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Company development
FAQ:
1. Are you trading company or factory?
We are factory in Yongjia, Wenzhou, China.
2. Are the prodcuts certified?
Yes, ISO, FDA, SIL 2, CE, LFGB and so on.
3. Delivery time?
7-15 working days usually, but it will be longer when peak season.
4. MOQ?
One set.