HVG INDUSTRIAL VALVES 0029: ZJHP Pneumatic Diaphragm Control Valve
| it is consist of pneumatic diaphragm mulitiple-spring actuator and mini single-seat valve. the merit of multiple-spring actuator is low height, light weight and simple outfit, mini valve are compact conformation, fluently gate and large coefficient of flow. | ||||||||
| valve body | ||||||||
| Type | Straight single-seat casting ball valve | |||||||
| Nominal Diameter | 20, 25, 32, 40, 50, 65, 80, 100, 125, 150, 200mm | |||||||
| Nominal Pressure | PN1.6, 4.0, 6.4MPa | |||||||
| Flange Standard | JB/T79.1-94. 79.2-94 etc. | |||||||
| Material | cast steel (ZG230-450) cast stainless steel (ZG1Cr18Ni9Ti ZG1Cr18Ni12Mo2Ti) etc. | |||||||
| Bonnet | standard -17~+230℃, Radiating type +230~ +450℃ | |||||||
| Gland type | bolt hold type | |||||||
| Packing | V-PTFE packing, asbestos textile packing, graphite packing, asbestos with PTFE packing | |||||||
| valve inner part | ||||||||
| Spool valve | Single-seat plunger spool valve | |||||||
| Flow characteristic | Equal percentage/Liner | |||||||
| Material | Stainless steel (1Cr18Ni9Ti , 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L) Titanium etc. | |||||||
| Actuator | ||||||||
| Type | ZHA/B multiple-spring diaphragm actuator | |||||||
| Type No. | 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 | 25 | 40 | 40/60 | 100 | |||
| Spring area | 20~100(standard) ; 20-60 ; 60-100 ; 40-200 ; 80-240 | |||||||
| Diaphragm material | NBR with nylon, ethylene propylene rubber with nylon | |||||||
| Supply gas pressure | 140~400MPa | |||||||
| Air interface | RC1/4′ | |||||||
| Ambient temperature | -30 ~ +70℃ | |||||||
| valve action type: air-to-close (B)—-valve position is opening (FO); air-to-open (K)—-valve position is close | ||||||||
| Accessories: Positioner, Air filter decompressor, Position switch, Valve position transmitter and so on. | ||||||||
| Performance | ||||||||
| Item | No Positioner | Positioner | ||||||
| Fundamental error% |
±5.0 |
±1.0 | ||||||
| Hysteresis error % | ≤3.0 | ≤1.0 | ||||||
| Dead band % | ≤3.0 | ≤0.4 | ||||||
| Original point | Air to open | Initial point | ±2.5 | ±1.0 | ||||
| End point | ±5.0 | ±1.0 | ||||||
| Air to close | Initial point | ±5.0 | ±1.0 | |||||
| End point | ±2.5 | ±1.0 | ||||||
| Rated stroke deviation % | ≤2.5 | |||||||
| Steam loss I/h | 0.01% x nominal capacity of valve | |||||||
| Adjustable extent R | 30:1 | |||||||
| Derated coefficient of flow Kv, Rated Stroke, Actuator type | |||||||||||||||
| Nominal diameter mm | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | ||||
| Seat diameter mm | 10 | 12 | 15 | 20 | 25 | 32 | 40 | 50 | 65 | 80 | 100 | 125 | 150 | 200 | |
| Derated coefficient of flow Kv | Straight line | 1.8 | 2.5 | 4.4 | 5.9 | 11 | 17.6 | 27.6 | 44 | 69 | 110 | 176 | 275 | 440 | 690 |
| Equal perfentage | 1.6 | 2.5 | 4.0 | 6.3 | 10 | 16 | 25 | 40 | 63 | 400 | 160 | 250 | 400 | 630 | |
| Rated stroke | 10 | 16 | 25 | 40 | 60 | ||||||||||
| Actuator type | ZHA/B-22 | ZHA/B-23 | ZHA/B-40 | ZHA/B-45 | |||||||||||
