Loc-Line 1/4" in-line check valve: 21191 pack of 2, 2
The price shown is for the pack.
Available
It comes in two options: 21191 (pack of 2) and 29451 (pack of 10). The pack contents are check valves.
It in the 1/4" valves group with the 1/4" male NPT, female NPT and in-line valves. Line pressure and flow data for the system are in the specifications.
Where this product is used
- Machine tool coolant supply, applying liquid coolant at the point of contact between the cutting tool and the target metal
- Other uses: the electronic, scientific, graphic arts and woodworking industries, and any job needing adjustable directional flow of fluid, air or vacuum, or third arm positioning
Features
- 1/4" in-line check valve: 21191 is the pack of 2 and 29451 the pack of 10
- Colour suffixes printed for 29451: -BLK (black) and -G (grey), adding a suffix to the part number orders that colour
- Made for the 1/4" system: parts from another hose system do not match it
- System: 1/4" Loc-Line modular hose
Key specifications
| Specification | Detail |
|---|---|
| Brand | Loc-Line |
| System | 1/4" Loc-Line modular hose |
| Valve type | In-Line Check Valve |
| Pack of 2 | 21191: (2) Check Valves |
| Pack of 10 | 29451: (10) Check Valves |
| Colour suffixes | Colour suffixes -BLK (black) and -G (grey), for 29451 |
| Line pressure, 1/4" system | 55 PSI standard, up to 110 PSI with element clamps on all joints, fully tightened |
| Flow rate, 1/4" system | 250 gal/hr |
| System data note | line pressure and flow by hose system, not by part number,, testing is recommended whenever possible |
| Pack | Pack of 2, Pack of 10 |
| Pack contents | (2) Check Valves, (10) Check Valves |
| Colour | Base part number, no suffix |
Choosing the right option
It comes in two options: 21191 (pack of 2) and 29451 (pack of 10). Choose the pack by quantity: 21191 is the pack of 2 and 29451 the pack of 10. -BLK (black) and -G (grey) against 29451 and a suffix is added to the part number when ordering. Match the valve to the hose system: a 1/4" system part does not fit hose from another system.
Other 1/4" valves: 1/4" male NPT valves (21192, 29452), 1/4" female NPT valves (21193, 29453), 1/4" in-line valves (21194, 29454).
Same-system fittings and tools: 1/4" NPT connectors, 1/4" hose assembly pliers (78001), 1/4" total flow control manifold kit (21198).
| Option | Part number | SKU |
|---|---|---|
| 2 | 21191 | A0107160 |
| 10 | 29451 | A0107161 |
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Loc-Line 1/4" In-line Check Valve for 1/4" Modular Hose: 2
SKU: A0107160 | Model: 21191
Loc-Line 21191: 1/4" in-line check valve, pack of 2. For the 1/4" Loc-Line modular hose system; pack contents (2) Check Valves.

