Self-Operated Electric Temperature Regulating Valve
Self-Operated Electric Temperature Regulating Valve
Self-Operated Electric Temperature Regulating Valve
Self-Operated Electric Temperature Regulating Valve

Self-Operated Electric Temperature Regulating Valve

  • Regulates temperature using the medium’s own energy; needs only 220 V AC power
  • Single-seat type for low differential pressure and viscous media; cage type for high differential pressure
  • DN20-200, PN1.0-6.4 MPa; -40 °C to +450 °C; 0-10 mA DC / 4-20 mA DC signal

Category

Overview

ZZWPE self-operated electric temperature regulating valve is suitable for large-diameter pipelines and heat transfer oil control. Its biggest advantage is that it only requires ordinary 220 V AC power supply. Using the energy of the controlled medium itself, it automatically regulates and controls the temperature of steam, hot water, hot oil, gas and other media directly. It can also be used for over-temperature protection or heat exchange applications. The valve features simple structure, convenient operation, wide applicable temperature adjustment range, fast response and reliable sealing performance, and can be freely adjusted during operation. It is therefore widely used for hot water supply in chemical, petroleum, food, textile, hotel and restaurant industries.

ZZWPE control valve covers nominal diameters from 20 to 200 mm and nominal pressures of 1.0, 1.6, 4.0 and 6.4 MPa, with a service temperature range from -40 °C to +450 °C. It accepts 0-10 mA DC or 4-20 mA DC signals to change the flow rate of the controlled medium, keeping the controlled process parameters at the set value. The single-seat regulating type is suitable for applications with small differential pressure, high medium viscosity or slight particle impurities, while the cage regulating type is suitable for applications with large differential pressure.

Control Valve Technical Parameters

Nominal Diameter DN (mm)
(Valve Seat Diameter dn)
20
25
32
40
50
65
80
100
125
150
200
(10) (12) (15) (20)
Rated Flow Coefficient Kv Linear 1.8 2.8 4.4 6.9 11 17.6 27.5 44 69 110 176 275 440 690
Equal Percentage 1.6 2.5 4 6.3 10 16 25 40 63 100 160 250 400 630
Rated Stroke (mm) 16 25 40 60
Nominal Pressure PN (MPa) 1.0, 1.6, 4.0, 6.4
Inherent Flow Characteristic Linear, equal percentage
Inherent Rangeability 50
Allowable Leakage Single-Seat Hard seat: Class IV; soft seat: Class VI
Cage Hard seat: Class II; soft seat: Class VI
Working Temperature t (°C) -20 to 200, -40 to 250, -40 to 450, -60 to 450
Signal Range (mA DC) 0-10, 4-20
Action Mode Reverse-acting, direct-acting
Ambient Temperature (°C) Electric control valve: -20 to 70
Ambient Humidity Electric control valve: ≤95%
Power Supply 220 V, 50 Hz

The performance specifications of this product comply with GB/T4213-92.

Technical Parameters of the Matching Electric Actuator
Nominal Diameter DN (mm)
20
25
32
40
50
65
80
100
125
150
200
Electric Actuator Standard Type ZAZ-60
DKZ-310		 ZAZ-60
DKZ-310		 DKZ-410 DKZ-410
DKZ-510
Electronic Type JHZAZ1 JHZAZ1 JHZAZ3 JHZAZ3
Actuator Thrust (N)
Full-Stroke Time (s)		 Standard Type 400
4000		 400
4000		 6400 6400
16000
Electronic Type 2000 4000 6000 8000
Standard Type 12.5 20 32 48
  Electronic Type 30 30 48 60
Power Consumption (W) Standard Type 28 35
Electronic Type 6 15 25 40

The data in the table are for conventional configurations only; specific selection shall be based on the main parameters and user requirements.

Allowable Differential Pressure

Single-Seat Regulating Type
Nominal Diameter (mm)
Thrust (N)
20
25
32
40
50
65
80
100
125
150
200
10 12 15 20
400 3.90 2.71 1.73 0.95 0.62 0.37 0.24 0.15            
2000 6.40 6.40 6.40 4.87 3.11                  
4000 6.40 6.40 6.40 6.40 6.11 3.73 2.39 1.53            
6000                 1.38 0.91 0.54      
6400                 1.45 0.95 0.61 0.40 0.28 0.15
8000                       0.50 0.34 0.19
16000                       0.98 0.68 0.38
Cage Regulating Type
Nominal Diameter (mm)
Thrust (N)
20
25
32
40
50
65
80
100
125
150
200
400 1.94 1.62 1.31 1.08 0.88            
2000 6.40 6.40                  
4000 6.40 6.40 6.40 6.40 6.40            
6000           6.40 6.40 6.40      
6400           6.40 6.40 6.40 6.40 6.40 6.40
8000                 6.40 6.40 6.40
16000                 6.40 6.40 6.40

If the allowable differential pressure value is greater than the nominal pressure, the nominal pressure value shall apply.

Performance Specifications

No.
Item
Single-Seat Valve
Cage Valve
1 Basic Error (%) ±2.5
2 Hysteresis (%) 2.0
3 Dead Band (%) 3.0
4 Rated Stroke Deviation (%) +2.5
5 Rated Flow Coefficient Deviation (%) ±10
6 Inherent Flow Characteristic Conforms to the slope deviation specified in IEC534-1 and GB/T4213-92

Overall Dimensions

Standard Type (Unit: mm)
Nominal Diameter DN
20
25
32
40
50
65
80
100
125
150
200
A 460 530 630
B 230 230 260
H1 490 540 625
L 150 160 180 200 230 290 310 350 400 480 600
H2 175 180 215 218 230 280 285 315 400 460 540
H3 53 57.5 70 75 82.5 92.5 100 110 125 142.5 170
Weight PN1.6, 4.0 50 52 54 56 58 75 87 95 132 135 155
PN6.4 53 56 58 65 68 84 110 129 177 180 210
Electronic Type (Unit: mm)
Nominal Diameter DN
20
25
32
40
50
65
80
100
125
150
200
D φ155 φ162 φ170
H4 290 325 380
L 150 160 180 200 230 290 310 350 400 480 600
H5 175 180 215 218 230 280 285 315 400 460 540
H6 53 58 70 75 82 92 100 110 125 142 170
Weight PN1.6, 4.0 10 12 15 17 18 34 46 54 76 79 100
PN6.4 13 16 19 26 27 43 69 85 120 125 150

Connection Dimensions & Standards

Flange standard: cast iron flanges per GB4216-84; cast steel flanges per GB9113-88.
Flange sealing face type: PN10 and PN16: raised face; PN40 and PN64: male-and-female face, valve body with female face.
Face-to-face length: GB12221-89.
Jacket insulated type, jacket heat medium connection: butt weld φ18×4.
Valve body flanges and face-to-face distance can be manufactured per the standards specified by the user, such as ANSI, JIS and DIN.

Main Parts Materials

Valve body and bonnet: HT200, ZG230-450, ZG1Cr18Ni9Ti.
Plug: ZG1Cr18Ni9Ti, Stellite hard-facing reinforced PTFE.
Packing: PTFE, flexible graphite.
Stem and bushing: 2Cr13.
Gasket: rubber-asbestos sheet, 10, 1Cr18Ni9Ti asbestos wound gasket.
Bellows: 1Cr18Ni9Ti.

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