Flange Tiny Drag Slow Close Butterfly Type 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
Flange tiny drag slow close butterfly check valves
Features
HH46/48/49X/H-10/16/25-type Flange 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 a novel structure, small size, light weight, small fluid resistance, reliable sealing, smooth open and close, wear-resistance, long service life, oil pressure and slow closed are not affected by media, good energy-saving effect and other features. HH46X HDH48X HH49X series of flange tiny drag slow close butterfly check valve has been widely promoted and used in the major industrial, urban construction and other industries, and the product response is good.
Dimensions & constructral diagram
Flange tiny drag slow close butterfly check valve constructral diagram
The materials of main parts
| part name | body | disc | stem,hydro-cylinder,piston | spring | seat |
| material | cast iron, cast steel | Carbon steel | SS | SS | NBR |
Main technical parameter
| type | nominal pressure （MPa） | intensity test pressure （MPa） | sealing pressure（MPa） | suitable temperature （℃） | applicable medium | slow close time |
| HH46X HDH48X HH49X | 1.0 | 1.5 | 1.1 | ≤80 | sea water sewage water | ≤60 S |
| 1.6 | 2.4 | 1.76 | ||||
| 2.5 | 3.75 | 2.75 |
Main external dimensions （flange connection dimensions：according to JB/T79-94 standard）
| nominal pressure PN(MPa) | nominal diameter DN(mm) | dimensions（mm） | nominal pressure PN(MPa) | nominal diameter DN(mm) | dimensions（mm） | ||||
| L | H | H1 | L | H | H1 | ||||
| 1.0 1.6 2.5 | 40 | 140 | 200 | 88 | 1.0 1.6 2.5 | 350 | 290 | 480 | 297 |
| 50 | 150 | 215 | 98 | 400 | 310 | 550 | 324 | ||
| 65 | 170 | 225 | 108 | 450 | 330 | 585 | 351 | ||
| 80 | 180 | 235 | 118 | 500 | 350 | 640 | 379 | ||
| 100 | 190 | 280 | 130 | 600 | 390 | 720 | 434 | ||
| 125 | 200 | 290 | 148 | 700 | 430 | 780 | 491 | ||
| 150 | 210 | 310 | 172 | 800 | 470 | 840 | 549 | ||
| 200 | 230 | 350 | 210 | 900 | 510 | 990 | 600 | ||
| 250 | 250 | 415 | 240 | 1000 | 550 | 1050 | 655 | ||
| 300 | 270 | 450 | 264 | 1200 | 630 | 1210 | 770 | ||
