The product
Application
- By actively controlling the opening and closing of piston valves through motors, DV valves have fewer mechanical transmission components, resulting in a longer service life. This makes them suitable for applications that require frequent opening and closing.
- They achieve precise adjustment and control of liquid flow rates, with linear adjustment of valve opening. They offer significant advantages, especially in applications that require precise quantitative loading ratios for ethanol-gasoline blends.
- The working process has low flow resistance, making it suitable for applications where there is no requirement for pipe pressure.
- DV valves are less affected by liquid viscosity, making them very suitable for applications involving products with high viscosity. They are an ideal replacement for electric hydraulic valves, where solenoid valve blockage is a common issue.
- Materials like CF8 and stainless steel can be used for some corrosive products (except for acids).
- The valve automatically closes when the power is turned off.
- They can be installed horizontally, vertically, and obliquely, offering a wide range of applications.
Comparison of the DV Valve with Electro-Hydraulic Valve:
| Displacer | DV Valve | Electro-Hydraulic Valve |
| Appearance |  |  |
Acting Mode | Active (√) Not affected by fluid pressure. (√) Not affected by fluid viscosity. (√) Flow resistance is small | Passive (x) Affected by fluid pressure (x) Affected by fluid viscosity (x) Flow resistance is big |
| Opening Control | By stepping motor (√) Linear regulation (√) Precisely control | By NO/NC continuously ( x ) Not perfect linear regulation ( x ) Not precisely controlled |
| Electrical Control | NO/NC 4~20mA RS 485Modbus | NO/NC |
| Valve Close | (√) No water hammer effect (√) Prevents overshoot. (√) Closes quickly when power drop off | ( x ) Have water hammer effect ( x ) Overshoot |
Material | Aço inStainless steel (√) Resistant to acid and alkali | Carbon steel ( x ) Resistant to acid and alkali |
| Application | (√) Self – pressure (self-flow) fixed load (√) Paraffin deposition (√) Precise blending/ loading control (√) Various chemical solvents | ( x ) Self-pressure (self-flow) fixed load ( x ) Paraffin deposition ( x ) Precise blending/ loading control ( x ) Various chemical solvent |
SDV Series Digital Control Valve
| Model | DV-05D | DV-08D | DV-10D | DV-15D | |
| Cv | GPM | 55 | 125 | 180 | 261 |
| Kv | M3/h | 47 | 108 | 156 | 226 |
Valve Opening Control Diagram by NO/NC
Technical Data
| Voltage | 24V/DC, 220V/AC |
| Control Mode | -NO/NC control; -4~20mA; -RS 485 Modbus control; |
| Working Temp. | -40°C~+85°C |
| Opening | 0~100% |
| Ex Proof Rating | Ex d IIC T5 Gb |
| Power Consumption | Valve acting: < 40W Valve remains open or closed: < 2W |
| Switch Speed | Fully close to fully open: <4s; Fully open to fully close: <2s; |
| Material | Body: CF 8 ASTMA351 Trim: Stainless steel Diaphragm: FEP fluorine coated O-ring |
| Electrical Entry | 2 of 3/4” NPT |
| IP Protection | IP 65 |
Models
| DV-05D | 50 (2”) | PN16/PN25/Class 150 |
| DV-08D | 80 (3”) | PN16/PN25/Class 150 |
| DV-10D | 100(4”) | PN16/PN25/Class 150 |
| DV-15D | 150(6”) | PN16/PN25/Class 150 |
Installation dimensions
| Flange Size | Class | L (mm) | H (mm) | G (mm) | B (mm) | E (mm) | D (mm) |
| 2“ | CLASS150 | 381 | 396.5 | 267 | 152 | 120.6 | 4-φ19 |
| 3” | CLASS150 | 434 | 454 | 310 | 190 | 152.5 | 4-φ19 |
| 4” | CLASS150 | 437 | 498.5 | 330 | 230 | 190.5 | 8-φ19 |
| 6” | CLASS150 | 485 | 571 | 432 | 280 | 241.5 | 8-φ22 |
