Two-plate Tiny Drag Slow Close Butterfly Check Valve
manufacturer: Shanghai MeiYan Yi Pump & Valve Co., Ltd.
E-mail: sales@1bengfa.com
Tel: +86 (21) 5640 2009
Mob: +86 138 1691 3072（WeChat Same Account）
product drawing
Two-plate tiny drag slow close butterfly check valves
Structural features
ZHYH46/ZHYH46EJ-type two-plate tiny drag slow close butterfly check valve can be used in clean water, sewage, sea water and other media drains pipes, to prevent the media backflow, and also can restrict the destructive water hammer effectively, ensuring the safe use of pipelines. The valve has new structure, small size, and reliable sealing, smooth open and close, wear-resistance, long service life, oil pressure and slow close are not affected by media, small flow resistance and wide applicable scope, good energy-saving effect.
Dimensions & constructral diagram
Two-plate tiny drag slow close butterfly check valve constructral diagram
The materials of main parts
| type | body,disc | stem, hydro-cylinder, piston | spring | seat |
| ZHYH46H/W-16/25/40CP ZHYH46ej-16/25 | carbon steel, stainless steel | SS | SS | SS |
Main technical parameter
| type | nominal pressure （MPa） | test pressure（MPa） | working temperature （℃） | applicable medium | |
| shell | sealing | ||||
| ZHYH46H/W-16/25/40CP ZHYH46ej-16/25 | 1.6 | 2.4 | 1.76 | ≤120 | water sea water, sewage |
| 2.5 | 3.75 | 2.75 | |||
| 4.0 | 6.0 | 4.4 | |||
Main external dimensions （flange connection dimension：PN1.6、PN2.5、PN4.0MPa according to JB/T79-94 standard）
| nominal diameter DN(mm) | L | H | H1 | nominal diameter DN(mm) | L | H | H1 |
| 100 | 240 | 280 | 115 | 450 | 470 | 585 | 351 |
| 125 | 260 | 290 | 142 | 500 | 500 | 640 | 379 |
| 150 | 275 | 310 | 172 | 600 | 560 | 720 | 434 |
| 200 | 305 | 350 | 210 | 700 | 620 | 750 | 491 |
| 250 | 340 | 415 | 240 | 800 | 680 | 792 | 549 |
| 300 | 370 | 450 | 264 | 900 | 740 | 900 | 600 |
| 350 | 400 | 480 | 294 | 1000 | 800 | 975 | 655 |
| 400 | 435 | 550 | 324 | 1200 | 920 | 1140 | 770 |
