Electric Control Valves
Electric Control Valves
Electric Control Valves
Electric Control Valves

Electric Control Valves

  • Single-seat, double-seat and cage trims driven by electric actuator for automatic process control
  • 220VAC power; 0-10 mA DC or 4-20 mA DC signal; fail-open (K) and fail-closed (B) types
  • DN 3/4″-300, PN1.6-6.4 MPa; linear and percentage characteristics, 30:1 rangeability

Category

Overview

ZAZ (P, N, M) electric control valve combines an electric actuator with various valve bodies (single-seat, double-seat, cage), offering the advantages of different valve types. Powered by single-phase AC 220V, it accepts the unified standard signal of 0-10 mA DC or 4-20 mA DC and automatically controls the valve opening to achieve automatic control of process parameters such as flow, pressure, temperature and liquid level. It is a key element of automatic regulation in production processes, widely used in automatic control systems in the power, metallurgy, light industry, food, petroleum and chemical industries.

Technical Parameters

Nominal Diameter DN (mm)
3/4″
20
25
32
40
50
65
80
100
125
150
200
250
300
Rated Flow Coefficient Kv Single-seat P 0.08～0.8 1.2～5.0 8 12 20 32 50 80 120 200 280 450    
Double-seat N     10 16 25 40 63 100 160 250 400 630 1000 1600
Cage M     15   20 30   75 115   240 350    
Nominal Pressure (MPa) 1.6 4.0 6.0
Stroke (mm) 10 16 25 40 60 100
Actuator Model DKZ-310/310C DKZ-410/410C/510/510C DKZ-510/510C
Signal Type II 0-10mA DC; Type III 4-20mA DC
Medium Temperature (℃) -40 ~ 230℃ (standard type); 230 ~ 450℃ with cooling fin (medium-temperature type); -100 ~ 600℃ on special order
Flow Characteristic Linear, percentage
Rangeability 30:1
Power Supply 220VAC 50 ~ 60Hz
Action Type Fail-open type (K); fail-closed type (B)
Valve Body Material Nominal Pressure (MPa) 0.6   Low temperature: ZG1Cr18Ni9Ti
1.6 Normal temperature: HT200, ZG230-450
4.0   Low temperature: ZG1Cr18Ni9Ti
Normal temperature: ZG230-450, ZG1Cr18Ni9Ti
Medium temperature: ZG230-450, ZG1Cr18Ni9Ti
6.4 Low temperature: ZG1Cr18Ni9Ti
Normal temperature: ZG230-450, ZG1Cr18Ni9Ti
Medium temperature: ZG230-450, ZG1Cr18Ni9Ti
Flange Dimensions Pipe connection Cast steel flanges per JB77-59; cast iron flanges per JB79-59
Flange Type Flange sealing type per JB77-59; PN6.0 flanges with tongue-and-groove face; cast steel flanges with smooth face; cast iron flanges with concave face
Trim Material 1Cr18Ni9Ti
Bonnet Type Standard type (normal temperature); cooling-fin type (medium temperature); long-neck type (low temperature)

Performance Specifications

Item
Index Value
Basic Error (%) ±5.0
Hysteresis (%) 3.0
Dead Band (%) 3.0
Leakage Single-seat valve Conforming to JB/T7387-94 Class IV, less than 10-4 of rated flow capacity
Double-seat valve Conforming to JB/T7387-94 Class III, less than 10-3 of rated flow capacity
Cage valve Conforming to JB/T7387-94 Class III, less than 10-3 of rated flow capacity

Allowable Differential Pressure

Operating Condition Valve plug in flow-to-open position; downstream pressure P2 = 0 when closed
Nominal Diameter DN (mm)
Seat Diameter DN (mm)
Actuator Effective Thrust (N)
Allowable Differential Pressure (MPa)
Electric straight-through single-seat control valve
PN1.6 (MPa)
PN6.4 (MPa)
3/4 3 4 5      
6 7 8
20 10 12 15 20 400, 1000, 2500 Nominal pressure 3.8 2.7 1.7 1.0
Nominal pressure 4.3 2.5
25 26 400, 1000, 2500 0.5 Nominal pressure 0.6 3.6  
32 32 0.4 Nominal pressure 0.4 2.3  
40 40 400, 1000, 2500, 6400 0.7 1.0 0.7 1.5  
50 50 0.5 1.0 0.5 1.0  
65 66 6400, 16000 1.4 1.4
80 80 1.0 1.0
100 100 0.6 0.6
125 125 6400, 16000 0.5 1.0 0.5 1.0
150 150 0.3 0.7 0.3 0.7
200 200 0.2 0.4 0.2 0.4
250 250 16000 0.3 0.3
300 300 0.2 0.2

Overall Dimensions

Nominal Diameter DN
A Actuator Width
B
L
H
H1
ZAZP single-seat
ZAZN double-seat
PN1.6
PN4.0
PN6.4
Standard type
Cooling-fin type
Standard type
Cooling-fin type
ZAZP
ZAZN
20 230 460 180 185 190 653 804 / / 65 /
25 185 190 205 665 816 670 937 99 104
32 200 210 220 671 822 673 943 105 107
40 220 230 240 683 834 693 982 116 126
50 230 530 250 255 265 698 849 698 992 131 131
65 275 285 295 789 949 799 1147 165 175
80 305 310 325 792 952 809 1177 173 190
100 350 355 370 796 956 821 1207 177 202
125 260 630 410 425 440 847 1062 872 1357 225 250
150 450 460 475 855 1070 882 1377 233 260
200 550 560 570 894 1109 924 1459 272 302
250 670 660 670 1156 1368 1156 1368 422 422
300 740 785 800 1215 1427 1215 1427 484 484

Overall Dimensions (ZAZM Cage Valve)

Nominal Diameter DN
L (mm)
A
B
H (mm)
H1 (mm)
PN16
PN40
PN64
Standard type
Cooling-fin type
25 184 197 230 230 460 668 819 75
40 222 235 260 684 835 95
50 254 267 300 684 835 98
80 295 317 380 230 530 785 946 130
100 350 368 430 795 946 156
150 480 473 550 260 630 945 1160 208
200 600 615 650 945 1160 250
250 650 670 690 1050 1320 265
300 740 770 800 1145 1320 265

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