ZDLT Electric Diaphragm Control Valve
The ZDLT type electric diaphragm control valve consists of an electronic actuator and a diaphragm control valve. It is powered by a 220V AC power supply and receives a standard 4-20mA DC electrical signal to realize flow regulation and control of corrosive media such as strong acids and alkalis, as well as high-viscosity and harmful media in process pipelines. It is applied in corrosion-resistant systems such as petroleum, chemical industry, and metallurgy.
Product features: The valve has small flow resistance and large flow capacity, no stuffing box, no external leakage, and features corrosion resistance, fire resistance, poison resistance, safety and reliability. Good corrosion resistance can be obtained according to different linings and diaphragms.
Main Technical Parameters |
Nominal diameter
DN(mm) |
15 |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
rated flow coefficient Kv |
8 |
12 |
16 |
38 |
60 |
68 |
90 |
150 |
300 |
500 |
600 |
1200 |
2000 |
nominal pressure MPa |
1 |
actuator |
Type Ⅱ |
381LSA-20 |
381LSB-30 |
381LSB-50 |
381LSC-65 |
381LSC-99 |
output shaft thrust (N) |
2000 |
3000 |
5000 |
6500 |
10000 |
working stroke mm |
10 |
16 |
25 |
40 |
60 |
allowable pressure difference MPa |
P1=△P |
1 |
0.89 |
1 |
1 |
1 |
1 |
1 |
0.6 |
0.38 |
0.15 |
0.057 |
P1=P2 |
1 |
0.44 |
1 |
1 |
0.75 |
0.9 |
0.55 |
0.3 |
0.19 |
0.075 |
0.028 |
flange standard |
JB/T79.1-94 |
flow characteristic |
approximately quick opening (regulating type) |
power supply voltage |
220V50Hz |
factory state |
Electrically open; if electrically closed is required,
it should be specified in the purchase contract.
|
Performance Indicators |
Item |
Index values |
Basic error (%) |
≤±3.5 |
Hysteresis (%) |
≤2.5 |
Dead band (%) |
≤3 |
Deviation of start and end points (%) |
±2.5 |
Rated stroke deviation (%) |
2.5 |
Pure lag |
≤1S |
Allowable leakage (L/h) |
0 for rubber diaphragms, 0.5% for polytetrafluoroethylene diaphragms, and the rated capacity of the valve (water under allowable pressure difference) |
Insulation resistance |
Not less than 20 MΩ |
Damping characteristic |
not more than three and a half cycles |
Valve body material |
lining material |
diaphragm material |
operating temperature |
applicable occasions |
HT200 |
无 |
chloroprene rubber |
0~65℃ |
non-corrosive occasions, abrasives, mud |
HT200 |
F46 |
fluororubber |
-20~+180℃ |
Strong acids, strong alkalis, strong oxidants, and general organic solvents |
ZG1Cr18Ni9Ti |
F46 |
F46 |
-20~+200℃ |
It has better corrosion resistance than the above. |
Valve body material |
无 |
fluororubber |
-20~+180℃ |
Media such as general acids, alkalis, and organic solvents |
Note: The valve body can be made of other corrosion-resistant materials. In this case, the diaphragm is made of F46, and the operating temperature ranges from -20℃ to +200℃. |
Overall dimensions Unit: mm
Nominal diameter
DN(mm) |
ZDLT type |
A |
H |
H1 |
L |
15 |
180 |
562 |
48 |
140 |
20 |
568 |
53 |
145 |
25 |
578 |
58 |
155 |
32 |
593 |
68 |
165 |
40 |
600 |
73 |
190 |
50 |
610 |
80 |
210 |
65 |
630 |
90 |
240 |
80 |
225 |
688 |
98 |
270 |
100 |
703 |
108 |
335 |
125 |
415 |
810 |
123 |
375 |
150 |
835 |
140 |
410 |
200 |
896 |
168 |
540 |
250 |
993 |
200 |
650 |
Codes for valve body material, lining and diaphragm
Base and lining |
HT200 |
ZG1Cr18Ni9Ti |
diaphragm |
none |
lined with F46 |
lined with F3 |
chloroprene rubber |
chlorinated rubber |
F46 |
code |
1 |
3 |
2 |
4 |
1 |
3 |
2 |