Product model: ZAMGW (P / M)
Nominal diameter: DN20 ~ 300mm
Nominal pressure: PN 1.6, 2.5, 4.0, 6.4Mpa
Ambient temperature: high temperature type (+ 250 ~ + 450 ℃)
Applicable media: gas, liquid, steam and other media
Connection standard: flange (FF RF RTJ), welding (SW BW), thread (applicable to within 1 ″)
Sealing packing: V-type PTFE packing and V-type flexible graphite packing
Spool type: single seat type, sleeve type
PRODUCT OVERVIEW
The pneumatic diaphragm high temperature regulating valve is composed of a multi spring pneumatic diaphragm actuator and a low flow resistance high temperature regulating valve body. The multi spring actuator has the advantages of low height, light weight and simple equipment. The flow channel of the valve body is s-streamline, which has the advantages of compact structure, light weight, sensitive action, small pressure drop loss, large valve capacity, accurate flow characteristics, convenient maintenance and so on. It can be used in harsh working conditions. Equipped with electric pneumatic valve positioning or pneumatic valve positioner, it can realize the automatic regulation and control of fluid medium in process pipeline. It is widely used to accurately control the process parameters of gas, liquid, steam and other media, such as pressure, flow, temperature, liquid level and so on. It is especially suitable for occasions with small allowable leakage, small pressure difference before and after the valve and high temperature.
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、10.0 | |||||||||||||
| 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 | High temperature type(+250～+450℃) | |||||||||||||
| Gland type | Bolt compression type | |||||||||||||
| Sealing packing | V-type PTFE packing, V-type flexible graphite packing | |||||||||||||
| 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 | Heat sink | carbon steel | 304 | 316 | 316L |
| 10 | Filler | PTFE/Graphite | PTFE/Graphite | PTFE/Graphite | PTFE/Graphite |
| 11 | Bolt | 25 | Stainless steel | Stainless steel | Stainless steel |
| 12 | 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 | 132 | 132 | 158 | 170 | 179 | 214 | 221 | 234 | 270 | 294 | 331 | |
| H2 | 350 | 350 | 380 | 380 | 380 | 480 | 480 | 480 | 610 | 610 | 610 | |
| 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 | |
