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Pneumatic regulating valves
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ZXPⅡ Pneumatic Diaphragm Low-noise Single Seat Control Valve

In the working place, there are three kinds of noise: mechanical noise, fluid-dynamic noise, aerodynamic noise. When the noise becomes excessive, you would select a low-noise control valve. It is especially suitable for the working place, which is high dropout or after shorting.
Detail
Main technical parameters
Body size DN (mm)
20
25
32
40
50
Ports size DN (mm)
10
12
15
20
10
12
15
20
25
32
32
40
32
40
50
Rated flow coefficient (KV)
Liner
1.8
2.8
4.4
6.9
1.8
2.8
4.4
6.9
11
17.6
17.6
27.5
17.6
27.5
44
Percentage
1.6
2.5
4.0
6.3
1.6
2.5
4.0
6.3
10
16
16
25
16
25
40
Rated travel
16
25
Diaphragm area (cm2)
280
400
Body size DN (mm)
65
80
100
125
150
200
250
Ports size (mm)
65
65
80
65
80
100
125
125
150
150
200
250
Rated flow coefficient (KV)
Liner
69
69
110
69
110
176
275
275
440
440
690
1100
Percentage
63
63
100
63
100
160
250
250
400
400
630
900
Rated travel
60
100
Diaphragm area (cm2)
1000
1600
Nominal pressure
PN
Mpa
1.6, 2.5, 4.0,6.4(6.3) /2.0, 5.0, 11.0
Bar
16, 25, 40, 64(63)/20, 50, 110
Lb
ANSI: Class150、Class300、Class600
Flow characteristic
Percentage、liner
Range ability(R)
50
Spring range(KPa)
20～100、40～200、80～240、(20～60、60～100)
Air supply (MPa)
0.14/0.25/0.3
Seat leakage
Class IV (10-4×Kv) ,    class VI
Working temperature
(0C)
Normal temperature type
-20～200 、-40～250、-60～250
Heat
Radiating type
mark：S
-40～350、-60～350
High temperature type
mark：G
350～550
Low temperature type
mark：D
DO:-60～-100、D1:-100～-200、D2:-200～-250
Regulator /cutting-off type
mark：Q
-40~150
Noise limits
≤80dBA

BUYER GUIDE
Data:
Type of valve, Valve size, Purpose
Body size, Nominal pressure
Working temperature
Input pressure, outlet pressure
Fluid name, Flux of medium, Fluid state
Bonnet type,
Air supply, Air-to-open or air-to-close
Material of Body and seat
Accessory:
Pneumatic retaining, Positioner, Limit switches, Solenoid valve, Redactor, Handwheel,
Flange standard, Flange interval
Other especial demand
Other