One-way barbed check valves with very low unlock pressure (< 20 mbar / 0.3 psi) to prevent backflow and support recirculation setups.
General
These check valves are designed for recirculation setups or equipment protection in microfluidic systems. Each valve allows forward flow at low pressure thresholds and blocks back-flow and diffusion when closed. With unlock pressures below 20 mbar (0.3 psi) and resistance to back pressures over 3 bar (43.5 psi), they are ideal for low-flow, high-integrity applications. Barbed ends ensure secure connections with flexible tubing, and multiple sealing and body material options are available to suit different chemical environments.
Content
1x Barbed Check Valve
Specifications
| SKU |
Barbed End |
Compatible Tubing ID |
Sealing Material |
Valve Material |
Unlock Pressure |
Maximum Back Pressure |
| DM-VA-003 |
1/16" |
1.0 mm – 1.6 mm |
EPDM |
PVDF |
< 20 mbar (0.3 psi) |
> 3 bar (43.5 psi) |
| DM-VA-004 |
1/16" |
1.0 mm – 1.6 mm |
Viton Silicone |
PP |
< 20 mbar (0.3 psi) |
> 3 bar (43.5 psi) |
| DM-VA-001 |
1/8" |
2.5 mm – 4.0 mm |
Viton |
PP |
< 20 mbar (0.3 psi) |
> 3 bar (43.5 psi) |
| DM-VA-002 |
1/8" |
2.5 mm – 4.0 mm |
Silicone |
PP |
< 20 mbar (0.3 psi) |
> 3 bar (43.5 psi) |
DM-VA-003
DM-VA-004
DM-VA-001
DM-VA-002
Documentation
Check the chemical compatibilities for this product here: PP - Chemical Resistance Chart
Check the chemical compatibilities for this product here: PPS - Chemical Resistance Chart
