Electric Three-Way Control Valve
Electric Three-Way Control Valve
Electric Three-Way Control Valve
Electric Three-Way Control Valve

Electric Three-Way Control Valve

  • DKZ electric actuator accepts unified standard signals (0-10 mA DC or 4-20 mA DC); valve opening directly proportional to the control signal
  • Converging and diverging types; replaces two single-seat or double-seat control valves; compact and economical
  • DN25-300, PN1.6-6.4 MPa; 30:1 rangeability; -100 °C to +600 °C

Category

Overview

ZAZQ(X) electric three-way control valve is available in converging and diverging types. It consists of a DKZ electric actuator and a three-way converging or diverging valve body. Driven by electric power, it accepts the unified standard signal of 0-10 mA DC or 4-20 mA DC, and the valve opening corresponds to the operating signal. The converging valve merges two fluid streams into one, while the diverging valve splits one fluid stream into two. The converging and diverging valves can only be selected correspondingly; however, when DN ≤ 80, the converging valve can be used for diverging applications. It can replace two single-seat or double-seat control valves, saving investment and occupying less space. Three-way control valves are commonly used for regulating two media in heat exchangers and for simple ratio control.

Control Valve Technical Parameters

Nominal Diameter (mm)
Converging
25
32
40
50
65
80
100
125
150
200
250
300
Diverging           80 100 125 150 200 250 300
Rated Flow Coefficient Kv Converging 8.5 13 21 34 52 85 135 210 340 535 800 1260
Diverging           85 135 210 340 535 800 1260
Nominal Pressure (MPa) 1.6, 4.0, 6.4
Flow Characteristic Linear
Actuator Type II DKZ-310 DKZ-310 DKZ-410 DKZ-510 DKZ-510
Type III DKZ-310C DKZ-310C DKZ-410C DKZ-510C DKZ-510C
Output Thrust (N) 4000 4000 6400 16000 16000
Stroke (mm) 16 25 40 60 100
Bonnet Type Plain (normal temperature), cooling-fin (medium temperature)
Allowable Differential Pressure (MPa) 1.6 1.0 2.5 1.6 1.5 1.0 0.65 0.4 0.3 0.16 0.26 0.18
Working Temperature (°C) -40 ~ 230 °C (normal temperature type); 230 ~ 450 °C with cooling-fin bonnet (medium temperature type); -100 ~ 600 °C (special order)
Rangeability 30:1
Flange Standard Cast iron per JB78-59; cast steel per JB79-59
Input Impedance Type II: 200; Type III: 250
Factory Setting Direct-acting as standard (with respect to the upper seat); if reverse-acting is required, please specify when ordering.

Performance Specifications

Item
Value
Basic Error (%) ≤±3.5
Hysteresis (%) ≤2.5
Dead Band (%) ≤3.0
Start/End Point Deviation (%) Direct-acting, reverse-acting ±2.5
  ±2.5
Allowable Leakage (L/h) Class III per JB/T7387-94, less than rated valve capacity ×10-3

Overall Dimensions

Nominal Diameter DN
A
L
H
H1
Diverging
Converging
PN1.6
PN4.0
PN6.4
Diverging
Converging
PN1.6
PN4.0
PN6.4
PN1.6
PN4.0
PN6.4
Plain
Cooling-fin
Plain
Cooling-fin
25 520 490 185 190 200     715 865       140 150 160
32 520 490 200 210 210     721 871       150 160 170
40 520 490 220 230 235     733 883       160 170 180
50 520 490 250 255 265     748 898       180 190 200
65 520 520 275 285 295     839 999       200 220 220
80 520 520 305 310 320 872 1032 842 1002 225 250 265 210 230 240
100 520 520 350 355 370 896 1056 846 1006 245 275 285 220 250 260
125 520 520 410 425 440 947 1162 897 1112 284 320 325 260 300 300
150 520 520 450 460 475 947 1162 897 1112 305 340 340 280 320 320
200 520 520 550 560 570 965 1180 905 1120 350 400 410 320 380 380
250 520 520 670 740 750                    
300 520 520 770 805 820                    

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