Product model: ZJHB (P / M)
Nominal diameter: DN25 ~ 300mm
Pressure range: PN1.6 ~ 6.4Mpa
Service temperature: - 40 ℃ ~ + 350 ℃
Technical standard: iec534-1-1976
Flange standard: JB / T79-2015
Valve form: straight through casting ball valve
Valve body material: cast steel (WCB) stainless steel (CF8)
Sealing packing: bellows seal, V-type polytetrafluoroethylene
PRODUCT OVERVIEW
The pneumatic bellows regulating valve is composed of a multi spring pneumatic diaphragm actuator and a bellows sealed regulating valve body. The valve core of the bellows regulating valve adopts the upper guide structure, which has a compact structure and an s-streamline flow channel, so that it has small pressure drop loss, large flow, wide adjustable range and high accuracy of flow characteristics. The upper valve cover adopts the bellows sealing structure to ensure the sealing performance. It is suitable for the adjustment of flammable, explosive, volatile, highly permeable and rare and precious metal media. In addition, pneumatic bellows regulating valve can also be used in vacuum.
PERFORMANCE CHARACTERISTICS
1. The double sealing structure of bellows packing is adopted to achieve no leakage and better safety and reliability; More reasonable material matching can be selected according to the on-site service temperature or pressure.
2. It is suitable for the adjustment of flammable, explosive, volatile, highly permeable and rare and precious metal media. Bellows packing double seal can also be used as adjustment on vacuum pipeline.
MAIN TECHNICAL PARAMETERS
| Nominal diameter(DN) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Seat diameter(dn) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | |
| Rated flow coefficient(KV) | Single seat | 6.9 | 11 | 17.6 | 27.5 | 44 | 69 | 110 | 176 | 275 | 440 | 630 | 875 | 1250 |
| Sleeve | 6.3 | 10 | 16 | 25 | 40 | 63 | 100 | 155 | 250 | 370 | 580 | 900 | 1300 | |
| Allowable differential pressure(MPa) | Single seat | 3.8 | 3.2 | 3.0 | 2.0 | 1.8 | 1.5 | 1.4 | 1.0 | 0,7 | 0.6 | 0.5 | 0.3 | 0.1 |
| Sleeve | 6.4 | 6.4 | 5.2 | 5.2 | 4.6 | 4.6 | 3.7 | 3.7 | 3.5 | 3.1 | 3.1 | 2.6 | 2.2 | |
| Nominal pressure（MPa) | 1.6、2.5、4.0、6.4 | |||||||||||||
| Rated stroke(mm) | 16 | 25 | 40 | 60 | 100 | |||||||||
| Actuator model | ZHA/B-22 | ZHA/B-23 | ZHA/B-34 | ZHA/B-45 | ZHA/B-56 | |||||||||
| Bonnet form | Bellows sealing type - 40 ~ + 350 ℃ | |||||||||||||
| Gland type | Bolt compression type | |||||||||||||
| Sealing packing | V-type PTFE packing, V-type flexible graphite packing料 | |||||||||||||
| Spool form | Single seat type, sleeve type | |||||||||||||
| Flow characteristics | Equal percentage, linear | |||||||||||||
TECHNICAL PARAMETERS OF ACTUATOR
| Configure actuator category | ZHA/B Multi spring thin film actuator | ||||
|---|---|---|---|---|---|
| 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 |
| trip(mm) | 10、16 | 24 | 40 | 40、60 | 100 |
| Spring range(KPa) | 20～100（standard）、20-60、60-100、40-200、80-240 | ||||
| Diaphragm material | Nitrile rubber with nylon cloth, ethylene propylene rubber with nylon cloth | ||||
| Air supply pressure | 140～400KPa | ||||
| air connection | RC1/4" | ||||
| ambient temperature | -30～+70℃ | ||||
| Accessories available | Positioner, air filter pressure reducer, holding valve, travel switch, valve position transmitter, hand wheel mechanism, etc | ||||
| Action form | Air off (B) - valve position open (FO) in case of gas loss; Gas open (K) - valve position closed (FC) in case of loss of gas | ||||
MAIN PERFORMANCE INDEXES
| Project | Without positioner | With locator | ||
|---|---|---|---|---|
| Basic error% | ±5.0 | ±1.0 | ||
| Return difference% | 3.0 | 1.0 | ||
| Deadband% | 3.0 | 0.4 | ||
| Deviation from starting point% | Gas on | Starting point | ±2.5 | ±1.0 |
| Starting point | ±5.0 | ±1.0 | ||
| Gas off | Starting point | ±5.0 | ±1.0 | |
| End | ±2.5 | ±1.0 | ||
| Rated stroke deviation% | ≤2.5 | |||
| Leakage L / h | 0.01% × Valve rated capacity | |||
| Adjustable range R | 30：1 | |||
MATERIAL OF MAIN PARTS
| 1 | Valve body | WCB | 304 | 316 | 316L |
|---|---|---|---|---|---|
| 2 | Shim | PTFE\Graphite gasket | PTFE\Graphite gasket | PTFE\Graphite gasket | PTFE\Graphite gasket |
| 3 | Seat / sleeve | 304 | 304 | 316 | 316L |
| 4 | Spool | 304 | 304 | 316 | 316L |
| 5 | Guide sleeve / cap | 304 | 304 | 316 | 316L |
| 6 | Middle cushion | PTFE\Graphite gasket | PTFE\Graphite gasket | PTFE\Graphite gasket | PTFE\Graphite gasket |
| 7 | Valve cover | WCB | 304 | 316 | 316L |
| 8 | Valve stem | 304 | 304 | 316 | 316L |
| 9 | Corrugated pipe | 304 | 304 | 316 | 316L |
| 10 | Filler | PTFE/Graphite | PTFE/Graphite | PTFE/Graphite | PTFE/Graphite |
| 11 | Packing gland | WCB | 304 | 316 | 316L |
MAIN CONNECTION DIMENSIONS
| Nominal diameter DN(mm) | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| L | PN16/25 | 181 | 184 | 200 | 222 | 254 | 276 | 298 | 352 | 410 | 451 | 600 |
| PN40 | 194 | 197 | 200 | 235 | 267 | 292 | 317 | 368 | 425 | 473 | 610 | |
| PN64 | 206 | 200 | 210 | 251 | 286 | 311 | 337 | 394 | 440 | 508 | 650 | |
| H | PN16/25 | 52.5 | 57.5 | 75 | 75 | 85.5 | 92.5 | 100 | 110 | 142.5 | 158 | 170 |
| PN40 | 52.5 | 57.5 | 75 | 75 | 82.5 | 92.5 | 100 | 117.5 | 150 | 167.5 | 187.5 | |
| PN64 | 65 | 40 | 85 | 85 | 90 | 102.5 | 107.5 | 125 | 172.5 | 195 | 207.5 | |
| H1 | 365 | 365 | 425 | 430 | 445 | 660 | 680 | 690 | 748 | 740 | 780 | |
| H2 | 298 | 298 | 298 | 298 | 298 | 380 | 380 | 380 | 510 | 510 | 510 | |
| H3 | 180 | 180 | 180 | 180 | 180 | 236 | 236 | 236 | 310 | 310 | 310 | |
| L1 | 289 | 289 | 289 | 289 | 289 | 347 | 347 | 347 | 476 | 476 | 476 | |
| A | 282 | 282 | 282 | 282 | 282 | 360 | 360 | 360 | 470 | 470 | 470 | |
| D | 220 | 220 | 220 | 220 | 220 | 270 | 270 | 270 | 320 | 320 | 320 | |
