Electronic Electric Double-Seat Control Valve
Electronic Electric Double-Seat Control Valve
Electronic Electric Double-Seat Control Valve

Electronic Electric Double-Seat Control Valve

  • Electronic integrated actuator with built-in servo amplifier: fast response, simple wiring, high regulating accuracy
  • Double-seat design: small unbalanced force, large allowable differential pressure and high flow capacity
  • DN20-400, PN0.6-6.4 MPa; -100 °C to +600 °C; 50:1 rangeability

Category

Overview

ZDLN electronic electric double-seat control valve consists of a PS series or 3610 series linear-motion electric actuator and a low-flow-resistance straight-through double-seat valve body (linear actuators of other brands can also be fitted). The electric actuator features an integrated electronic construction with a built-in servo amplifier: once the input control signal (4-20 mA DC or 1-5 VDC) and the power supply are connected, the valve opening can be positioned directly, achieving regulation of pressure, flow, level, temperature and other process parameters. It features fast response, simple wiring, large flow capacity, compact size and high regulating accuracy. The double-seat valve features small unbalanced force, large allowable differential pressure and high flow capacity, and is suitable for clean media with loose leakage requirements and relatively high differential pressure. It is widely used in power, metallurgy, chemical, petroleum, environmental protection, light industry and equipment industries.

Control Valve Technical Parameters

Nominal Diameter (mm)
20
25
32
40
50
65
80
100
125
150
200
250
300
400
Seat Diameter (mm) 20 25 32 40 50 65 80 100 125 150 200 250 300  
Rated Flow Coefficient Kv 6.9 11 17.6 27.5 44 69 110 176 275 440 690 1000 1600 2700
Nominal Pressure (MPa) 0.6, 1.6, 2.5, 4.0, 6.4
Stroke (mm) 10 16 25 40 60 100
Flow Characteristic Linear, equal percentage, quick opening
Working Temperature (°C) -40 ~ 230 °C (normal temperature type); 230 ~ 450 °C with cooling-fin bonnet (medium temperature type); -100 ~ 600 °C (special order)
Flange Dimensions Per JB78-59 and JB79-59; also available per JB/79.1-94, JB/79.2-94, ANSI, JIS and DIN
Valve Body Material WCB(ZG230-450), ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti CF8 CF8M
Valve Plug Material 1Cr18Ni9, SS304, 0Cr18Ni12Mo2Ti, SS316, ZG1Cr18Ni9Ti
Body Type Straight-through double-seat cast globe valve
Bonnet Type Plain (normal temperature), cooling-fin (medium temperature), extension (low temperature)
Allowable Differential Pressure of Valve Body Not exceeding nominal pressure 4.0 3.4  
Matching Electric Actuator Model PSL PSL-201 PSL-202 PSL-204 PSL-208 PSL-312 PSL325
361L 361LSA-08 361LSA-20 361LSB-30 361LSB-50 361LSC-65 361LSC-99
Explosion-proof 361LXA-20 361LXB-30 361LXB-50  

Notes: 1. Products with flanges to ANSI, JPI and JIS standards are available on request; face-to-face dimensions determined as required. 2. Products with working temperature, nominal pressure or nominal diameter beyond the listed range can be supplied on request.

Actuator Technical Parameters

Model
Rated Output Force (N)
Travel Speed (mm/s)
Technical Parameters
PSL
361L
PSL
361L
PSL
361L
PSL
361L
201 361LSA-08
361LXA-08		 1000 800
800		 0.25 4.2
4.2		 Power supply: AC220V 50Hz
Input signal: DC4-20mA or DC1-5V (shielded cable for signal)
Output signal: DC4-20mA
Protection class: IP67
With handwheel		 Power supply: AC220V 50Hz
Input signal: DC4-20mA or DC1-5V (shielded cable for signal)
Output signal: DC4-20mA
Protection class: equivalent to IP55
Explosion-proof mark: ExdⅡBT4
With handle
202 361LSA-20
361LXA-20		 2000 2000
2000		 0.50 2.1
2.1
204 361LSB-30
361LXB-30		 4500 3000
3000		 0.50 3.5
3.5
208 361LSB-50
361LXB-50		 8000 5000
5000		 1.00 1.7
1.7
312 361LSC-65 12000 6500 0.60 2.8
325 361LSC-99 25000 10000 1.0 2.0

Performance Specifications

Item
Value
Basic Error (%) With 361L: ±2.5; with positioner: ±1.0
Hysteresis (%) With 361L: ±2.0; with PSL: ±1.0
Dead Band (%) 1.0
Start/End Point Deviation (%) Direct-acting Start point ±2.5
End point ±2.5
Reverse-acting Start point ±2.5
End point ±2.5
Rangeability 50:1
Rated Stroke Deviation (%) 2.5
Allowable Leakage (L/h) Class III per JB/T7387-94, less than rated valve capacity ×10-3

Allowable Differential Pressure

Nominal Diameter (mm)
25
40
50
65
80
100
150
200
250
300
Seat Diameter (mm)
25
32
40
50
65
80
100
125
150
200
250
300
Actuator
Allowable Differential Pressure ΔP (MPa)
With PSL PSL202 6.4 6.4 6.4 5.1                
PSL204         6.4 6.4 5.62          
PSL208               6.4 5.31 3.97    
PSL320                     6.4 4.14
With 361L 361LSA-20 6.4 6.4 6.4 6.4                
361LSB-50         6.4 6.4 6.25          
361LSC-65               6.4 4.23 3.23    
361LSC-99                     3.31 2.07

Note: Actual configuration depends on specific process parameters. If the allowable differential pressure is unclear or the maximum working differential pressure exceeds the listed range, please contact us and a proper solution can be provided.

Overall Dimensions

Nominal Diameter (mm)
25
32
40
50
65
80
100
125
150
200
250
300
L (mm) PN1.6 MPa 185 200 220 250 275 300 350 410 450 550 670 770
PN4.0 MPa 190 210 230 255 285 310 355 425 460 560 740 805
PN6.4 MPa 200 210 235 265 295 320 370 440 475 570 750 820
H1 (mm) 117 120 139 144 188 208 220 268 278 320 441 503
With PSL H (mm) Standard 907 910 955 960 1112 1122 1134 1213 1223 1265 1813 1889
Cooling-fin type 1037 1040 1085 1090 1275 1285 1297 1412 1422 1464 2058 2134
D (mm) 176 225
Weight (kg) 22.5 24.5 35.5 39.5 72 85 122 181 237 378 680 840
With 361L H (mm) Standard 670 673 840 845 1037 1047 1059 1293 1303 1345 1538 1614
Cooling-fin type 800 803 970 975 1200 1210 1222 1492 1502 1544 1783 1859
D (mm) 225 310
Weight (kg) 30 32 51 55 87 100 137 194 250 391 720 880

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