SMC VXD21/22/23 Series Pilot Operated 2 Port Solenoid Valves
For Water, Oil, Air
Key Features
- Pilot Operated 2 Port Solenoid Valve
- Series: VXD21, VXD22, VXD23
- Applications: Suitable for Water, Oil, and Air.
- Power Consumption Reduction: Significant reduction in power consumption for DC specifications (e.g., 6W down to 4.5W/5.5W for VXD21, 8W down to 7W for VXD22, 11.5W down to 10.5W for VXD23).
- Corrosion Resistance: Improved resistance due to special magnetic material adoption.
- Enclosure: IP65 rated for dust and water protection.
- Low Noise Construction: Special construction minimizes operational noise.
- Flame Resistance: Conformed to UL94V-0 standard with flame-resistant mold coil material.
- Maintenance Performance: Easy maintenance facilitated by threaded assembly.
Series Variations
The VX series offers various configurations, including:
- Direct Operated 2 Port Valves: VX21/22/23
- Pilot Operated 2 Port Valves for Zero Differential Pressure: VXZ22/23
- Direct Operated 3 Port Valves: VX31/32/33
- Pilot Operated 2 Port Valves for Steam: VXP21/22/23
- Water Hammer Relief, Pilot Operated 2 Port Valves: VXR21/22/23
- Pilot Operated 2 Port Valves for High Pressure: VXH22
- 2 Port Valves for Dust Collectors (Solenoid/Air Operated): VXF21/22, VXFA21/22
- Air Operated 2/3 Port Valves: VXA21/22, VXA31/32
Technical Specifications
Normally Closed (N.C.) and Normally Open (N.O.)
Detailed specifications including port size, orifice size, model numbers, minimum/maximum operating pressure differential, flow characteristics (Av, Cv converted), maximum system pressure, material, and weight are provided for various configurations.
| Port Size | Orifice Size (mm) | Model (N.C.) | Min. Op. Press. Diff. (MPa) | Max. Op. Press. Diff. (MPa) | Flow Characteristics (Av x 10-6m2) | Max. System Press. (MPa) | Weight (g) |
|---|---|---|---|---|---|---|---|
| 1/4 (8A) | 10 | VXD2130-02 | 0.02 | 0.7 / 0.5 | 46 | 1.9 | 420 |
| 3/8 (10A) | 15 | VXD2140-03 | 1.0 | 1.0 / 0.7 | 110 | 4.5 | 670 |
| 1/4 (8A) | 10 | VXD2130-04 | 0.02 | 0.7 / 0.5 | 58 | 2.4 | 500 |
| 1/2 (15A) | 15 | VXD2140-04 | 1.0 | 1.0 / 0.7 | 130 | 5.5 | 670 |
| 3/4 (20A) | 20 | VXD2150-06 | 1.0 | 1.0 / 0.7 | 230 | 9.5 | 1150 |
| 1 (25A) | 25 | VXD2260-10 | 1.0 | 1.0 / 0.7 | 310 | 13 | 1650 |
| 32A | 35 | VXD2270-32 | 0.03 | 1.0 / 0.7 | 550 | 23 | 5400 |
| 40A | 40 | VXD2380-40 | 0.03 | 1.0 / 0.7 | 740 | 31 | 6800 |
| 50A | 50 | VXD2390-50 | 1.0 | 1.0 / 0.7 | 1200 | 49 | 8400 |
Flow Characteristics
The document details methods for indicating flow characteristics using Sonic Conductance (C) and Effective Area (S), along with formulas and graphs for air and water. It explains how to determine flow rates based on pressure differentials and provides examples.
Fluid Compatibility and Operating Conditions
A comprehensive list of applicable fluids is provided, categorized by seal material and valve configuration (N.C./N.O.). It specifies operating fluid temperatures, ambient temperatures, and tightness (leakage rate) for different seal materials.
Ordering Information
A detailed 'How to Order' section explains the coding system for selecting models, orifice sizes, port sizes, solenoid valve options, electrical entry types, coil insulation types, and rated voltages. This includes tables for model/orifice size, solenoid valve options, and rated voltage/electrical options.
Construction and Component Parts
Diagrams illustrate the construction of Normally Closed (N.C.) and Normally Open (N.O.) valves for different model ranges. Component parts lists are provided with descriptions, sizes, materials, and options.
Dimensions
Dimensional drawings are provided for various models and electrical entry types (Grommet, Conduit, DIN terminal, Conduit terminal), showing key measurements in millimeters.
Safety Instructions and Precautions
Extensive safety instructions and precautions are outlined, covering:
- General Safety: Caution, Warning, Danger labels and their meanings.
- Design Precautions: Not for emergency shutoff, extended energization, explosion-proof applications, maintenance space, liquid rings, actuator drive, pressure holding, conduit type, water hammer.
- Selection Precautions: Confirming specifications, fluid compatibility (type, inflammable oil/gas, corrosive gas, oil-free), fluid quality (foreign matter, scale), air quality (clean air, filters, dryers), ambient environment, static electricity.
- Mounting Precautions: Air leakage, external force on coil, coil orientation, heating coil, securing with brackets, vibration, painting.
- Piping Precautions: Preparation, pipe tape wrapping, grounding, tightening torque, steam drainage, vacuum/non-leak applications.
- Wiring and Electrical Connection: Wire gauge, circuit types, voltage tolerance, surge protection, grommet/DIN connector details, conduit connections.
- Operating Environment: Corrosive gases, explosive atmospheres, vibration, impact, radiated heat, water droplets/oil/spatter.
- Maintenance: Product removal (temperature caution), low frequency operation, filters/strainers, lubrication, storage, air filter drain.
SMC Global Network
Information on SMC's global manufacturing, distribution, and service network is provided, listing locations by region.
