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ZMAP/N-W Pneumatic Thin Film Bellows Control Valve
Caliber range: DN25-100mm Pressure range: PN1. 0-4.0MPa Applicable temperature: -60~150 ℃ Product application: The ZMAP/N-W type (Pneumatic Thin Film
Product details
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ZMAP/N-W Pneumatic Thin Film Bellows Control Valve
CHARACTERISTICS
The ZMAP/N-W type (Pneumatic Thin Film Bellows Control Valve) consists of two parts: a pneumatic thin film actuator and a single and double seat valve sealed with bellows. The valve core component adopts a bellows sealing structure, and there is still a packing seal at the top of the upper valve cover, forming two seals that can strictly prevent the medium from leaking outward. Therefore, it is suitable for regulating highly toxic, valuable, volatile or permeable process media. 2、 Main technical parameters
Nominal diameter DN (mm)
25
32
40
50
64
80
100
Valve seat diameter DN (mm)
26―24
32―30
40―38
50―48
66―64
80―78
100―98
Rated flow coefficient Kv
10
16
25
40
63
100
160
Traffic characteristics
Directly; Equal percentage
Nominal pressure PN (MPa)
1.0 1.6 4.0
Connection type
Flange connection: according to JB78-59 standard
Equipped with actuator model
ZMA―2
ZMA―3
ZMA―4
Effective area Fe (cm)2)
280
400
630
Travel L (mm)
16
25
40
action
Airtight type; Air opening type
Spring pressure range (KPa)
Standard 20-100, optional 40-200, 20-60, 60-100
Gas supply pressure (MPa)
Standard 0.14 can choose 0.24
Air source connector
M16×1.5
Inherent adjustable ratio R
30：1
3、 Main technical performance indicators
project
Without valve positioner
Equipped with valve locator
Basic error%
≤±5
≤±1
Return difference%
≤3
≤1
Dead zone%
≤3
≤0.4
leakage rate
0.01% x valve rated capacity
Rated quantity coefficient error%
≤10
4、 Valve body material and applicable temperature range
Material
Material grade
Nominal pressure (MPa)
Applicable temperature range (℃)
cast steel
ZG230～450
1.0 1.6 4.0
―40～150
Cast stainless steel
ZG1Cr18Ni9Ti ZG0Cr18Ni12Mo2Ti
―60～150
Allowable pressure difference
It is recommended that the working pressure difference of the standard pneumatic thin film corrugated sealed double seat regulating valve should not exceed 1MPa. To ensure the accuracy of the adjustment, a valve positioner must be equipped.
5、 Main external connection dimensions
Nominal diameter DN (mm)
A
L
H
H1
PN1.0 1.6
PN2.5 4.0
air-to-close
Air opening type
25
Φ280
185
190
583
636
104
32
200
210
585
638
107
40
Φ325
220
230
716
795
126
50
250
255
721
800
131
65
Φ410
275
285
1064
1165
175
80
300
310
1081
1182
190
100
350
355
1093
1194
202
Three Long Ordering Notice
1. Product model and name 2. nominal diameter DN (mm) 3. nominal pressure 4. flow characteristics requirements 5. valve body material and valve trim material
6. Type of medium and temperature range 7. Pressure difference before and after the valve 8. Sealing form
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