pneumatic film high temperature control valve
technical parameter
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 medium: gas, liquid, steam and other media
connection standard: flanged (ff rf rtj), welded (sw bw), threaded (for within 1″)
sealing packing: v-type ptfe packing, v-type flexible graphite packing
spool form: single seat type, sleeve type
product description
the pneumatic film high temperature regulating valve is composed of a multi-spring pneumatic film actuator and a low flow resistance high temperature regulating valve body. the multi-spring actuator is low in height, light in weight and simple in 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 and convenient maintenance, etc. it can be used in harsh working conditions. equipped with electro-pneumatic valve positioner or pneumatic valve positioner, it can realize automatic adjustment and control of the fluid medium in the 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 other parameters to maintain at a given value. it is especially suitable for occasions where the allowable leakage is small, the pressure difference between the front and rear of the valve is small and the temperature is high.
the main technical parameters
| 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 | |
| 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 | |
| pn(mpa) | 1.6、2.5、4.0、6.4、10.0 | |||||||||||||
| l(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 form | bolt compression | |||||||||||||
| seal packing | v-type ptfe packing, v-type flexible graphite packing | |||||||||||||
| spool form | single seat type, sleeve type | |||||||||||||
| flow characteristics | equal percentage, straight | |||||||||||||
actuator technical parameters
| configure actuator class | zha/b multi-spring diaphragm 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 |
| l(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 supply interface | rc1/4" | ||||
| ambient temperature | -30～ 70℃ | ||||
| accessories available | positioner, air filter pressure reducer, position retaining valve, travel switch, valve position transmitter, hand wheel mechanism, etc. | ||||
| form of action | air-to-close (b)—valve open (fo) when gas is lost; air-to-open (k)—valve to be closed when gas is lost (fc) | ||||
main performance indicators
| project | without locator | with locator | ||
| basic error % | ±5.0 | ±1.0 | ||
| return difference % | 3.0 | 1.0 | ||
| dead zone % | 3.0 | 0.4 | ||
| always point deviation% | electric switch | start point | ±2.5 | ±1.0 |
| start point | ±5.0 | ±1.0 | ||
| air to close | start 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 | body | wcb | 304 | 316 | 316l |
| 2 | gasket | 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 pad | ptfe\graphite gasket | ptfe\graphite gasket | ptfe\graphite gasket | ptfe\graphite gasket |
| 7 | cap | wcb | 304 | 316 | 316l |
| 8 | 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 external connection dimensions
| 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 | |