PQ340H cast steelEccentric Semi-Globe ValveBy turning the worm gear mechanism, drive the eccentric hemisphere rotation, so as to realize the opening and closing of the valve, the valve flow resistance is small, reliable sealing, stable performance, is widely used in a variety of fluid control systems. Eccentric hemispherical valve using eccentric valve body, eccentric ball and seat, the valve stem for rotary motion in the common trajectory of automatic centering, the tighter the closing process, to achieve good sealing purpose. Valve ball and seat detachment, eliminating the wear and tear of the sealing ring, overcoming the traditional ball valve seat and ball sealing surface is always wear and tear of the problem of non-metallic elastic materials are embedded in the metal seat, the valve seat metal surface is well protected. This product is especially suitable for steel industry, aluminum industry, fibers, tiny solid particles, pulp, coal ash, petroleum gas and other media.
Product Characteristics
- 流通面积大,流阻小。这是因为开启后阀芯位于藏球室,流体直通。
- 操作扭矩小,转90度即可启闭完成,操作轻便。
- 密封严紧,双偏心金属硬密封。结构不影响启闭,这是半ball valvesThe most significant advantage.
- 使用寿命长,密封副耐磨,且有补偿量,阀座可调整或更换。
Product Parameters
产品型号 | PQ340H-16C |
阀体材质 | 铸钢 |
公称压力 | ≤1.6Mpa |
适用介质 | 水、蒸汽、油品 |
适用温度 | ≤325°C |
Product Size Reference

DN | L | H | D | D1 | D2 | T-f | n-Фd |
50 | 178 | 155 | 165 | 125 | 102 | 18-3 | 4-18 |
65 | 190 | 165 | 185 | 145 | 122 | 18-3 | 8-18 |
80 | 203 | 190 | 200 | 160 | 138 | 20-3 | 8-18 |
100 | 229 | 200 | 220 | 180 | 158 | 20-3 | 8-18 |
125 | 254 | 265 | 250 | 210 | 188 | 22-3 | 8-18 |
150 | 267 | 280 | 285 | 240 | 212 | 24-3 | 8-22 |
200 | 292 | 325 | 340 | 295 | 268 | 26-3 | 12-22 |
250 | 330 | 385 | 405 | 355 | 320 | 26-4 | 12-26 |
300 | 356 | 430 | 460 | 410 | 378 | 28-4 | 12-26 |
350 | 430 | 480 | 520 | 470 | 438 | 30-4 | 16-26 |
400 | 530 | 520 | 580 | 525 | 490 | 32-4 | 16-30 |
450 | 580 | 560 | 640 | 585 | 550 | 40-4 | 20-30 |
500 | 630 | 655 | 715 | 650 | 610 | 44-4 | 20-33 |
600 | 800 | 710 | 840 | 770 | 725 | 54-5 | 20-36 |
700 | 900 | 780 | 910 | 840 | 795 | 40-5 | 24-36 |
800 | 1000 | 840 | 1025 | 950 | 900 | 42-5 | 24-39 |
900 | 1100 | 1000 | 1125 | 1050 | 1000 | 44-5 | 28-39 |
1000 | 1200 | 1100 | 1255 | 1170 | 1115 | 46-5 | 28-42 |
1200 | 1300 | 1250 | 1485 | 1390 | 1350 | 52-5 | 32-48 |
1400 | 1500 | 1380 | 1685 | 1590 | 1530 | 58-5 | 36-48 |
1600 | 1800 | 1500 | 1930 | 1820 | 1750 | 64-5 | 40-56 |
1800 | 2100 | 1680 | 2130 | 2020 | 1950 | 68-5 | 44-56 |