Manual worm gear blind valve
Product overview
Nominal diameter: DN300~2000mm
Nominal pressure: PN0.05~0.25MPa
Applicable temperature: -20℃~300℃
Applicable temperature: 200°C (silicone rubber) 300°C (fluorine rubber)
Drive mode: electric, hydraulic, pneumatic, electro-hydraulic
Body material: carbon steel, rubber, chrome steel
Design standards: API 600, API6D, ASME B16.34, GB/T 12234
Structure length: ASME B16.10, API6D, GB/T 12221
Connection standards: ASME B16.5, ASME B16.47, GB/T 9113, JB/T 79, HG/T 20592
Pressure test: API 598, GB/T 13927, JB/T 9092
Pressure-temperature rating: ASME B16.34, GB/T 12224
Structural features
Manual worm gear blind valve is mainly composed of left valve body, right valve body, screw rod pair, flap, sealing ring, lever, worm gear device and other parts, and a rigid structure is formed by a base and a supporting column. The rubber sealing ring is inlaid on the flap, which has the characteristics of high temperature resistance, good sealing performance, easy replacement and long service life.
Main performance parameters
| Nominal pressure MPa | 0.25 | 0.15 | 0.10 | 0.05 |
| Seal test pressure MPa | 0.275 | 0.165 | 0.11 | 0.055 |
| Strength test pressure MPa | 0.40 | 0.225 | 0.15 | 0.075 |
| Drive source | Compressed air 0.4-0.6MPa; oil pressure 6.3MPa; 3-phase 380V50HZ | |||
| Applicable temperature ℃ | Nitrile rubber | Silicone Rubber | fluororubber | |
| -20-100 | -20-200 | -20-300 | ||
| Applicable medium | Toxic, harmful and flammable gas such as gas | |||
| Opening and closing time S | ≤60 | |||
| Material of main parts | The valve body and gate are made of carbon steel; the screw rod is made of alloy steel; the nut is made of manganese-copper alloy and ductile iron; the retractor is made of stainless steel | |||
Main connection size
| DN | L | D | D1 | H | H1 | A | b | n-d |
| 300 | 450 | 440 | 395 | 1200 | 380 | 480 | 22 | 12-22 |
| 350 | 450 | 490 | 445 | 1300 | 420 | 520 | 22 | 12-22 |
| 400 | 450 | 540 | 495 | 1400 | 560 | 580 | 22 | 16-22 |
| 450 | 500 | 595 | 550 | 1400 | 560 | 650 | 24 | 16-22 |
| 500 | 500 | 645 | 600 | 1480 | 600 | 800 | 24 | 16-22 |
| 600 | 600 | 755 | 705 | 1600 | 760 | 1000 | 24 | 20-26 |
| 700 | 600 | 860 | 810 | 1680 | 880 | 1050 | 26 | 24-26 |
| 800 | 800 | 975 | 920 | 1860 | 1125 | 1129 | 26 | 24-30 |
| 900 | 800 | 1075 | 1020 | 2055 | 1270 | 1242 | 28 | 24-30 |
| 1000 | 800 | 1175 | 1120 | 2240 | 1400 | 1375 | 30 | 28-30 |
| 1100 | 800 | 1275 | 1220 | 2425 | 1535 | 1510 | 30 | 28-30 |
| 1200 | 800 | 1375 | 1320 | 2620 | 1680 | 1625 | 30 | 32-30 |
| 1300 | 800 | 1475 | 1420 | 2760 | 1770 | 1749 | 30 | 32-30 |
| 1400 | 850 | 1575 | 1520 | 2960 | 1925 | 1856 | 32 | 36-30 |
| 1500 | 850 | 1690 | 1630 | 3105 | 2050 | 1976 | 32 | 36-30 |
| 1600 | 850 | 1790 | 1730 | 3300 | 2160 | 2093 | 32 | 40-30 |
| 1800 | 1100 | 1990 | 1930 | 3610 | 2370 | 2335 | 32 | 44-30 |
| 2000 | 1100 | 2190 | 2130 | 3960 | 2620 | 2570 | 32 | 46-30 |
Jing12011202000600
