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| 1.Material | EPDM,NBR,CR,KFM,VITON,PTFE, |
| 2.Construction | inner core,outer cover,frame,metallic ring, |
| 3.connector approval | flange,flange type,threaded type flexible coupling rubber |
| 4.type | single sphere,double sphere and reducing sphere, |
| 5.threads | BSPT ,BSP,NPS,NPT,Metric |
| 6.flange drilled | BS,ANSI,DIN,JIS,UNI,or others provided drawings sample |
| 7.surface | galvanized ,epoxy |
| 8.normal size | single sphere(DN32-DN3000),double sphere(DN32-DN1200)threaed flexible coupling rubber (DN15-DN80) |
| 9.usage | protecting piping and equipment system from stress or motion |
| Type | nominal diameter of pipe | Length | Height | external diameter of flange |
| XH8150-125-X | 50 | 125 | 47 | 150 |
| XH8180-175-X | 80 | 175 | 72 | 200 |
| XH81100-225-X | 100 | 225 | 97 | 225 |
| XH81150-320-X | 150 | 320 | 47 | 275 |
| XH81200-375-X | 200 | 375 | 197 | 338 |
| XH81250-475-X | 250 | 475 | 247 | 400 |
| XH81300-560-X | 300 | 560 | 297 | 485 |
| XH81350-625-X | 350 | 625 | 344 | 525 |
| XH81400-700-X | 400 | 700 | 394 | 588 |
| XH81450-780-X | 450 | 780 | 444 | 625 |
| XH81500-880-X | 500 | 880 | 494 | 688 |
| XH81600-1000-X | 600 | 1000 | 494 | 800 |
| XH81700-1000-X | 700 | 1100 | 694 | 969 |
| XH81800-1260-X | 800 | 1260 | 794 | 1080 |
| XH81900-1400-X | 900 | 1400 | 894 | 1150 |
| XH811000-1520-X | 1000 | 1520 | 988 | 1250 |
| XH811200-1725-X | 1200 | 1725 | 1188 | 1485 |

epdm rubber duckbill check valve:
1. Inner package: plastic bag one pcs/box
2. Outer pacakge :wooden cases (in usually the size of 1100mm*1100mm*1100mm the 20 feet container can hold 18 wooden cases
3. Mix sizes per wooden cases or every size per wooden cases



1.-15 years‘s export experience .We can design as customer request for different product .
2.24 hours online-- Anytime,anywhere can provide what you want
3.100% QC inspection Before Shippment
4.CE/UL/FCC listed,competitve price
5.ACT fairly by all men--Give enough service to samll list
5.best production capability ,best quality control, Best Service .
New products from manufacturers at wholesale prices