Flange Tiny Drag Slow Close Muffler 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 soundproofing check valves
Features and usages
DHH44-type Flange tiny drag slow close muffler check valve is used in industrial, urban water supply and drainage, and high-rise residential, high-level hotels, pressure-increased water pump outlet. The design of the valve has full consideration of the applicable environmental requirements, using indined disc structure, to achieve no vibration, no noise, smooth operation, to ensure the quiet of hotel and residential environment, and has energy-saving effect. The Valve adopts delayed closure type to make partially inverted water flow within the system, thereby greatly reducing the water pressure of stopping pumps reflux, and eliminates the causing of destructive water hammer peak value. The closed sealing adopts nitrile rubber, with features of good sealing performance, damping and wear resistance, long service life, easy to maintain and so on.
Technical parameter
nominal pressure：1.0～1.6MPa
nominal diameter：200～2000mm
applicable medium： water,mud water,sea water,sewage
suitable temperature：0～80℃
flange standard：GB/T 17241.6 GB/T9113
test standard：GB/T 13927 AP1598
Typical installation diagrams
Flange tiny drag slow close soundproofing check valve typical installation diagrams
Dimensions & constructral diagram
Flange tiny drag slow close soundproofing check valve(pic1)
Flange tiny drag slow close soundproofing check valve(pic2)
The materials of main parts
| part name | body | disc | sealing ring | stem | buffering cylinder |
| material | grey cast iron, carbon steel | carbon steel | NBR | SS | SS |
The connection and external dimensions
| DN (㎜) | 200 | 250 | 300 | 350 | 400 | 450 | 500 | 600 | 700 | 800 | 900 | 1000 | 1200 | 1400 | 1600 | 2000 |
| L | 230 | 250 | 270 | 290 | 310 | 330 | 350 | 390 | 430 | 470 | 510 | 550 | 630 | 710 | 790 | 950 |
| H | 550 | 630 | 690 | 780 | 860 | 910 | 980 | 1070 | 1220 | 1320 | 1430 | 1550 | 1800 | 1980 | 2150 | 2550 |
| B | 450 | 520 | 590 | 670 | 750 | 780 | 850 | 970 | 1080 | 1200 | 1300 | 1450 | 1670 | 1880 | 1950 | 2450 |
