Short Description:
DS series check valves allow free flow in one direction and block flow in the counter direction
DS series check valves allow free flow in one direction and block flow in the counter direction.
Technical data
| Size | 6 | 8 | 10 | 15 | 20 | 25 | 30 |
| Threaded connection Inch | G1/4″ | G3/8″ | G1/2″ | G3/4″ | G1″ | G1 1/4″ | G1 1/2″ |
| Threaded connection Metric | M14X1.5 | M18X1.5 | M22X1.5 | M27X2 | M33X2 | M42X2 | M48X2 |
| Max .flow rate(L/min) | 15 | 30 | 40 | 120 | 200 | 300 | 400 |
| Max .operating pressure(Mpa) | 31.5 | ||||||
| Distance across flats(mm) | 19 | 24 | 30 | 36 | 46 | 60 | 63 |
| Length(mm) | 58 | 58 | 72 | 85 | 98 | 120 | 132 |
| Weight(KGS) | 0.1 | 0.2 | 0.3 | 0.5 | 1 | 2.1 | 2.5 |
| Valve body（Material）Surface treatment | Steel Body Surface Black Oxide | ||||||
| Oil cleanliness | NAS1638 class 9 and ISO4406 class 20/18/15 | ||||||
Threaded connection dimensions
Subplate dimensions
| Size | B | B1 | L | L1 | L2 | L3 | L4 | L5 | D | D1 |
| 10 | 87 | 66.7 | 90 | 23.5 | 7.2 | — | 35.8 | 42.9 | 11 | 4-M10/20 |
| 20 | 110 | 79.4 | 120 | 23.4 | 11.1 | — | 49.2 | 60.3 | 22 | 4-M10/20 |
| 30 | 128 | 96.8 | 148 | 27.8 | 16.7 | 42.1 | 67.5 | 84.2 | 28 | 6-M10/20 |
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