Pneumatic film Cast Iron Flange three way control valve
ZJHX/Q pneumatic three-way regulating valve
ZJHQ, ZJHX pneumatic thin film three-way valve using cylindrical thin wall window spool guide, different from the plunger spool bushing guide. With multi-spring actuator, it has the advantages of simple structure, light weight, small volume, convenient disassembly and assembly. Widely used in precise control of gas, liquid and other media process participation such as pressure, flow, temperature, liquid level to maintain a given value. Suitable for a kind of fluid through the three way valve into two way outflow or two kinds of fluid through the three way valve combined into a fluid occasion.
This series of products have three – way confluence and three – way split two kinds. Nominal pressure PN16, 40, 64; Nominal diameter range DN25-300. Applicable fluid temperature from -60℃ to +450℃. The leakage standard is grade Ⅳ. Flow characteristics have two kinds of straight line, parabola.
Product features
ZJHX (Q) pneumatic three-way regulating valve has confluence regulating valve and shunt regulating valve two structural forms. Spool structure using cylinder thin wall window, and the spool side guide, three-way valve in some occasions can replace two two-way valve and a three-way nozzle and wait until widely used in the heat exchanger two-phase regulation, can also be used for simple ratio regulation. When nominal size and pressure difference are small, the confluence valve can be used for shunting occasions and can be used interchangeably, but nominal size is greater than 80mm and pressure. Large difference in the diversion situation, can not be used interchangeably.
Material of main parts and recommended temperature range
| Code | Materials | Temperature range |
| Valve body
Up and down Valve cover |
HT200 | -20～200℃ |
| ZG230-450 | -40～450℃ | |
| ZG1Cr18Ni9Ti | -250～550℃ | |
| Valve element、valve seat、valve rod | 1Cr18Ni9 | -250～550℃ |
| Sealing gasket | Rubber asbestos plate | |
| Spiro winded gasket | ||
| Padding | polytef | |
| Upper and lower membrane cover | A3 steel plate | |
| Mebrane | 35CrMoA | |
| 35、A3 | ||
| Bracket, top disk | HT200 | |
| Compression spring | 60Si2Mn | |
| Wave spinning thin film | 5806 Clip 480D nylon 66 m |
Main technical parameters and performance indicators
Adjust the main technical parameters of the mechanism
| Valve seat diameter | Confluence | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| Shunt | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated flow coefficient kv | Confluence | 8.5 | 13 | 21 | 34 | 52 | 85 | 125 | 210 | 340 | 535 | 800 | 1260 |
| Shunt | 25 | 32 | 40 | 50 | 65 | 85 | 125 | 210 | 340 | 535 | 800 | 1260 | |
| Nominal pressure Mpa | 1.6 4.0 6.4 | ||||||||||||
| Route(mm) | 16 | 25 | 40 | 60 | 100 | ||||||||
| Flow characteristic | Flow characteristic | ||||||||||||
| Medium temperature ℃ | -20～200、-40～+250(normal temperature )、-40～315（medium temperature ） | ||||||||||||
| Flange size | Cast iron flang size with JB79-59, Cast steel flange size with JB79-59 | ||||||||||||
| Flange type | Flange sealing face type with JB77-59,Cast iron flange with Smooth type,Cast steel flange with concave type. | ||||||||||||
| Valve body materials | HT200,ZG230-450、ZG1Cr18Ni9 | ||||||||||||
| Valve core material | 1Cr18Ni9 | ||||||||||||
| Bonnetk modality | Normal temperature typ，medium temperature type | ||||||||||||
| Adjustable | 30:1 | ||||||||||||
| Air supply connection | M16×1.5 | ||||||||||||
Actuator and main technical parameters
| Model | ZHA(B)-3 | ZHA(B)-4 | ZHA(B)-5 | ZHA(B)-6 |
| Active area cm | 400 | 630 | 1000 | 1600 |
| Route(mm) | 16.25 | 40 | 60 | 1000 |
| Spring rangeKpa | 20～100；40～200、20～60、60～100、80～240 | |||
Performance index
| Project | No positioner | With positioner | ||
| Basic error% | ±6 | ±1.5 | ||
| Gear backlash％ | 5 | 1.5 | ||
| Dead zone％ | 4 | 0.6 | ||
| Origin-destination deviation% | Air off | Origin | ±2.5 | ±1.5 |
| Destination | ±6.0 | |||
| Air on | Origin | ±6.0 | ||
| Destination | ±2.5 | |||
| Deviation of rated stroke % | ±2.5 | |||
| Allowable leakage L/H | 10-3×Rated valve capacity | |||
Note: Usually all with positioner
Pneumatic thin film three-way regulating valve allows differential pressure
| Nominal pressure | Spring pressure | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 |
| 0.14MPa | 20-100 | 1220 | 750 | 500 | 300 | 300 | 200 | 120 | 120 | 80 | 50 | 50 | 25 |
Accessories: Positioner, handwheel mechanism ,air filter decompressor and etc.
| Nominal diameter mm | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| L(mm) | PN1.6MPa | 185 | 200 | 220 | 250 | 275 | 300 | 350 | 410 | 450 | 550 | 635 | 720 |
| PN4.0MPa | 190 | 210 | 230 | 255 | 285 | 310 | 355 | 425 | 460 | 560 | 660 | 740 | |
| PN6.4MPa | 200 | 210 | 235 | 265 | 295 | 320 | 370 | 440 | 475 | 570 | 670 | 770 | |
| H1(mm) | PN1.6MPa | 140 | 150 | 160 | 180 | 200 | 220 | 220 | 256 | 278 | 322 | 540 | 612 |
| PN4.0MPa | 150 | 160 | 170 | 190 | 220 | 232 | 256 | 295 | 313 | 372 | 540 | 612 | |
| PN6.4MPa | 160 | 170 | 180 | 200 | 220 | 242 | 266 | 300 | 318 | 382 | 540 | 612 | |
| H(mm) | Ordinary type | 435 | 441 | 465 | 480 | 584 | 585 | 575 | 762 | 772 | 792 | 1203 | 1234 |
| Cooling fin type | 565 | 571 | 595 | 610 | 631 | 748 | 738 | 961 | 971 | 989 | 1525 | 1554 | |
| D(mm) | 285 | 360 | 470 | ||||||||||
| Weight(KG) | 72 | 75 | 81 | 88 | 135 | 158 | 190 | 262 | 322 | 450 | 550 | 600 | |
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