Drain Valves
WBK-20 Automatic Drain Valve for Compressed Air Systems
WBK-20 mechanical automatic drain valve removes condensate from compressed air systems without electricity. Compact, reliable and suitable for air tanks, filters and dryers.
The WBK-20 Automatic Drain Valve is designed for automatic condensate removal from compressed air systems. Using a mechanical float-operated structure, it automatically discharges accumulated water without requiring electrical power.
Its compact body, reliable drainage mechanism and simple installation make it suitable for air receivers, compressed air filters, dryers and other air treatment equipment.
Key Features
Automatic Drainage
The internal float mechanism automatically opens the drain when condensate reaches a certain level and closes after the liquid is discharged.
No Electricity Required
The WBK-20 operates mechanically and does not require electrical wiring, reducing installation complexity and maintenance requirements.
Low Air Loss
The valve discharges condensate only when necessary, helping reduce unnecessary compressed air loss compared with continuously venting drain methods.
Compact Design
The compact body is suitable for installations where available space is limited.
Reliable Float Mechanism
The internal float structure responds automatically to changes in condensate level for consistent drainage performance.
Manual Drain / Pressure Relief Function
A manual control is provided for inspection, cleaning or pressure relief when required.
Durable Construction
The metal valve body provides good pressure resistance and durability for industrial compressed air applications.
How It Works
Condensate enters the drain chamber and gradually accumulates inside the valve.
As the liquid level rises, the internal float moves upward and activates the drainage mechanism.
Operating process:
Condensate enters
↓
Liquid level rises
↓
Float rises
↓
Drain valve opens
↓
Condensate is discharged
↓
Float drops and the valve closes
This process repeats automatically during system operation.
Typical Applications
The WBK-20 is suitable for use with:
- Air receiver tanks
- Compressed air filters
- Refrigerated air dryers
- Water separators
- Air compressor systems
- Pneumatic equipment
- Pipeline condensate collection points
Specification
Specification | Details |
Product Name | Zero Air Loss Dual-Layer Filter Drain Valve |
Model | WBK-20 |
Inlet Port | G1/2 |
Outlet Port | G3/8 |
Body Material | Aluminum Alloy |
Working Pressure | 1.6 MPa |
Connection Type | Pipe Thread |
Working Medium | Compressed Air |
Maximum Operating Temperature | 100°C |
Maximum Drain Capacity | 680 kg/h |
Installation Orientation | Horizontal / Vertical |
Key Feature | Large Flow Passage, Anti-Clogging Design |
Product Dimensions | 150 × 82 × 103 mm |