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Control valve

Huijin Valve: a professional manufacturer of regulating valves.

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ZMAW pneumatic butterfly valve

ZMAW pneumatic butterfly valve

Overview
ZMAW pneumatic diaphragm regulating butterfly valve is a rotary type regulating valve , which has the advantages of small size, light weight, and large rated flow coefficient. It is especially suitable for large-caliber, large-flow, thick turbid slurry or boiler kiln gas control.
This series of products are standard, high temperature and sealed. The nominal pressure level of the product is 0.1, 0.25, 0.6, 1.0, 1.6, 2.5 MPa, and the caliber is from 50mm to 1000mm. The leakage level is Ⅱ and Ⅵ. The flow characteristics are approximately equal percentages.
When pneumatically switched to manual, the side-mounted handwheel mechanism is used: pull out the positioning pin, pull the handle upward, the worm gear engages with the worm, press the positioning pin, and rotate the handwheel to change the circulation cross-section. When manually switching to pneumatic, just pull the handle by phase.

【Structural features】
Valve body: HT200, ZG230-450, ZG1Cr18Ni9Ti
Valve plate: carbon steel, 1Cr18Ni9Ti
Long axis: 1Cr18Ni9Ti
Seat: Carbon steel, stainless steel lined with synthetic rubber or reinforced polytetrafluoroethylene. Inner bearing: bronze, stainless steel overlay welding. Titanium alloy filler: polytetrafluoroethylene, flexible graphite.

The main technical parameters

Nominal diameter mm
50
80
100
125
150
200
250
300
350
400
450
500
600
700
800
900
1000
Rated flow coefficient Kv
85
220
340
530
770
1360
2130
3060
4160
5450
6900
8500
12200
16600
21700
27540
34000
Nominal pressure MPa
0.6
Rated turning angle °
70
Signal pressure KPa
20 ~ 100
Flow characteristics
Approximate equal percentage
Medium temperature ℃
-20 ~ 200 (normal temperature); -40 ~ 450 (medium temperature); -40 ~ 600 (high temperature)
Takeover flange
JB78-59 Wafer Flange Connection
Signal connection screw hole
M16 × 1.5
Equipped with actuator
Film type
ZMA-2
ZMA-3
ZMA-4
ZMA-5
Piston
ZSC-45
Body material
ZG230-450; 1Cr18Ni9; ZG1Cr18Ni9Ti, ZGOCr18Ni12Mo2Ti
Optional accessories
Handwheel, positioner, air filter pressure reducer, etc.

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