Check Valve AK Series
Brand :
SMC
Caution
- Refer to the catalog for product specifications.
- Product images may be representative images. Refer to the catalog for details.
Product Description
Check valves for air pressure; available in a broad range of types.
[Features]
· Large valve capacity
· Low cracking pressure at 0.02 MPa
[Applications]
· For air pressure
Check Valve AK Series Specifications
AK6000 external appearance
AK4000 external appearance
JIS symbol
Model
| Model | Connection port diameter | Sonic conductance dm3/(s-bar) | Critical pressure ratio | Weight g |
|---|---|---|---|---|
| AK4000-03 | 3/8 | 17 | 0.25 | 150 |
| AK4000-04 | 1/2 | 19 | 140 | |
| AK6000-06 | 3/4 | 40 | 345 | |
| AK6000-10 | 1 | 46 | 315 |
Common Specifications
| Usable fluids | Air |
|---|---|
| Guaranteed pressure resistance | 1.5 MPa |
| Maximum operating pressure | 1 MPa |
| Minimum operating pressure | 0.02 MPa |
| Ambient temperature and working fluid temperature | -5 to 60°C (no freezing) |
Flow Characteristics
Note: Representative valves are used for the flow characteristics.
AK4000-04
AK6000-06, 10
Structural Drawing
AK4000/6000 structural drawing
Components
- 1. Body (made of aluminum diecast)
- 2. Cover (made of aluminum diecast)
Replacement parts
| Number | Description | Materials | Part number | |
|---|---|---|---|---|
| AK4000 | AK6000 | |||
| 3 | Valve | POM | 19014 | 19024 |
| 4 | Spring | Stainless steel | 19015 | 19025 |
| 6 | Ring | NBR | 19016 | 19026 |
| 7 | Seat ring | Brass, NBR | 19013 | 19023 |
Dimensional Outline Drawing
Check Valve dimensional drawing
| Model | Connection port diameter | L1 | □B | H |
|---|---|---|---|---|
| AK4000-04 | 1/4, 3/8, 1/2 | 67 | 36 | 36 |
| AK6000-06, 10 | 3/4, 1 | 95 | 50 | 50 |
Units: mm
Design Notes And Selection
- 1. The valve may not open fully and may oscillate if the IN side on the check valve is throttled, even if used within the specification range detailed in the catalog.
- 2. The minimum operating pressure is the pressure at which the valve begins to open, not the pressure at which it fully opens.
- 3. The check valve is structured so that the differential pressure generated when switching between the solenoid valve for the primary pressure (IN) and secondary pressure (OUT) causes it to close. Note that if the primary pressure (IN) drops gently and the differential pressure becomes less than the minimum operating pressure or cracking pressure, the secondary pressure (OUT) may also drop with the check valve not fully closing.