The 231Y series is available in 1/8 inch and 1/4 inch female NPT sizes, with AC and DC coil options for automated control, venting, and flow switching duties. As a result, it fits compact systems where buyers need small-port switching, low-pressure operation, and straightforward electrical integration.
3-Way Solenoid Valves provide flow switching and diversion for liquids and gases in compact control systems. The 231Y Series is a brass body, 3-way direct-acting, normally closed valve designed for low differential pressure operation in small-port fluid routing applications.
Available Configurations
Below is a quick configuration summary for valve construction, port size, electrical options, and connection details. Buyers can use this section to narrow down the right setup before reviewing the full specification table.
| Configuration Item | Details |
|---|---|
| Valve type | 3-way direct acting |
| Body material | Brass |
| Valve action | Normally closed (NC) |
| Connection type | Female NPT |
| Pipe sizes | 1/8 inch, 1/4 inch |
| Seal material | NBR |
| Mounting | Vertical or horizontal |
| Coil voltages | 12V DC, 24V DC, 110V AC |
| Coil connection | DIN 43650A |
| Coil class | H |
| Protection class | IP65 |
| Duty cycle | 100% continuous duty |
| Approval | CE |
Technical Specifications
The 231Y Series fits compact 3-way control applications where buyers need to confirm switching function, port size, pressure capability, and electrical fit. However, buyers should still check application suitability against the media, system pressure, and porting requirements.
| Specification | 231Y Series |
|---|---|
| Valve function | 3-way flow switching and diversion |
| Operating principle | Direct acting |
| Body material | Brass |
| Seal material | NBR |
| Connection type | Female NPT |
| Fail Position | Normally closed |
| Pipe sizes | 1/8 inch, 1/4 inch |
| Orifice size | 1.5 mm |
| Flow coefficient Cv | 0.09 |
| Flow rate | 0.70 GPM at 60 psi |
| Operating pressure | 0 to 115 psi |
| Operating temperature | 25 to 195°F |
| Voltage options | 12V DC, 24V DC, 110V AC |
| Coil connection | DIN 43650A |
| Coil class | H |
| Protection class | IP65 |
| Duty cycle | 100% continuous duty |
Pressure, Temperature, and Media Fit
The 231Y Series is designed for operation under low differential pressure conditions and does not require a minimum pressure to operate. However, the spec sheet notes that gravity-fed applications may be a poor fit because the valve uses a small 1.5 mm orifice.
Compatible media guidance in the sheet includes water, air, and other low viscosity fluids. Operating pressure is listed from 0 to 115 psi, while the operating temperature range is 25 to 195°F. Therefore, review final media compatibility before selection.
Dimensions and Size Range
The 231Y Series uses a compact body for tighter installations. Specifically, both 1/8 inch and 1/4 inch versions share the same nominal dimensional envelope, which can simplify panel, skid, or compact equipment layouts.
| Pipe Size | Overall Height (H) | Port to Port Length (L) | Overall Width (W) | Weight |
|---|---|---|---|---|
| 1/8 inch | 3.70 in | 1.68 in | 1.12 in | 0.77 lb |
| 1/4 inch | 3.70 in | 1.68 in | 1.12 in | 0.77 lb |
Flow Function
Use this valve for 3-way control when you need to switch or divert fluid flow between ports. The flow diagram in the spec sheet shows two operating states:
- Valve de-energized: exhaust port open, inlet port closed, outlet port open
- Valve energized: exhaust port closed, inlet port open, outlet port open
Design and Performance
- 3-way direct-acting design for switching and diversion
- No minimum pressure requirement
- Compact body design for tighter spaces
- Brass body with stainless steel internal components
- NBR seal material
- Vertical or horizontal mounting
- Base thread allows mounting with an M5 screw
- Suitable for continuous energization within rated limits
- Pre-filter recommended to help protect internal sealing surfaces and components
Typical Uses
| Application / System | Typical Use |
|---|---|
| Process fluid routing | Switching or diverting flow between ports in compact control systems |
| Hydronic HVAC systems | Directing heated or chilled water through control circuits |
| Water treatment equipment | Flow switching for treatment, filtration, or utility water systems |
| Laboratory and pilot systems | Routing small fluid paths in controlled test or process setups |
| Cleaning and washdown systems | Diverting or venting fluid lines during automated cleaning cycles |
| Cooling system control | Managing bypass or alternate flow paths in cooling circuits |
| Utility water distribution | Switching low-flow utility or process water lines |
| Dispensing systems | Controlling flow direction or venting in small dispensing assemblies |
| Solar water heating systems | Switching circulation paths in compact solar hot water loops |
| Aquarium and aquaculture systems | Managing controlled water routing in smaller process lines |
| Irrigation control | Directing low-flow water paths in automatic irrigation systems |
Technical Resources
The 231Y specification sheet includes exact porting details, dimensions, and ordering codes. Review it carefully before making a final selection or requesting a quote.
- Download the detailed 231Y Valve Series spec sheet
- Contact Atlantic Valves for product support
- Request a quote for 3-way switching applications
Technical Note
These valves are not intended for use in medical life support, combustion, aviation, aerospace, automotive, or similar applications. Therefore, review final media compatibility before selection.
