
Internal check valve with bypass
1-body, 2,3-cover, 4,5-arm, 6-fastening cable.

Internal check valve
1-body, 2-cover.

| TECHNICAL CHARACTERISTICS | ||||||
| Designation | DN,
мм |
L, мм | Н, мм | Di, мм | n x d, мм | Weight, kg Маса, кг |
| Х-50 | 50 | 130 | 140 | 110 | 4х14 | 1,8 |
| Х-80 | 80 | 190 | 230 | 150 | 4×18 | 3,2 |
| Х-100 | 100 | 202 | 235 | 170 | 4×18 | 4 |
| Х-150 | 150 | 308 | 315 | 225 | 8×18 | 9 |
| ХП-250* | 250 | 425 | 520 | 335 | 12×18 | 22 |
| ХП-300* | 300 | 480 | 600 | 395 | 12×22 | 97 |
| ХП-350* | 350 | 580 | 620 | 470 | 16×26 | 45 |
| ХП-400* | 400 | 690 | 750 | 525 | 16×30 | 123 |
| ХП-500С* | 500 | 700 | 830 | 650 | 20×33 | 347 |
| ХП-600* | 600 | 960 | 1030 | 770 | 20×36 | 400 |
Internal check valves in accord with TU U 24607422.008-2000 are intended for preventing the leakage of oil products from above-ground tank in case of any fault in the valve gates or in the pipeline.
For opening the cover of internal check valve, the control mechanism with manual drive (МУ1, МУ2, МУВ) or with electric drive (МУЗ) is used.