YQD971J-10/16/25Q Lug Type Electrical Gear Operated Butterfly Valve, DN 2"-12", PN 1.0/1.6/2.5 MPa, Product Description Application: It is widely used in pipelines as control or throttling apparatus for supply and drainage pipeline of potable water, seawater, waste water, petrochemical industry, energy and power, shipping, food and drug, natural gas, coal gas, HVAC and fire protection systems as well as the building pipelines. Features l Compact structure, convenient manufacture; l Easy handling,90 degrees rotation with quick on/off switch; l Stable flow regulating, good regulating characteristics; l Low flow resistance, large fluid; l Numbers of on/off times up to tens of thousands; long life service; l Various type of parts materials opted for use in different medium; l Both inner and outer surfaces of the valve body are electro-statically coated with epoxy resin powder which is environmentally friendly and non-toxic, directly applying to living and potable water, as well as food and drug industry; l Symmetrical structure in both sides, duplex use, especially applied to in condition with duplex sealing and easy corrosion of valve body;
Full vulcanization of the valve seat:The inner surface of the valve body is encapsulated with vulcanized rubber evenly to make rubber attach the body firmly with much more reliable sealing ability. The rubber’s abrasion resistance and anti-aging abilities are greatly strengthened so that completely isolate fluid from contacting with the metal of valve body, therefore the valve having an excellent anti-corrosion ability. Vulcanization Process
Main Parts List
No. | Name | Materials |
1 | A –type circlips for holes | 06Cr17Ni12Mo2/316(Stainless steel) |
2 | O-ring | NBR/EPDM/ FPM/CR |
3 | Seal cap | PTFE(F-4),ZCuAl9Mn2 |
4 | Upper shaft | 06Cr17Ni12Mo2,316(Stainless steel) |
5 | Bushing | PTFE(F-4),ZCuAl9Mn2 |
6 | Rubber-encapsulated valve body | GGG50, NBR/EPDM/ FPM |
7 | Butterfly disc | 06Cr17Ni12Mo2/316(Stainless steel)/316, GGG50 with epoxy resin coating/ ZCuAl9Mn2/ZCuAl9Mn2+Ni |
8 | Lower shaft | 06Cr17Ni12Mo2/316(Stainless steel) |
9 | End cap | 2Cr13 |
Main Performance Parameters
Nominal Pressure | 1.0 MPa | 1.6MPa | 2.5MPa | |
Test Pressure | Shell test | 1.5 MPa | 2.4MPa | 3.75MPa | Normal Temperature |
Sealing Ability | 1.1MPa | 1.76MPa | 2.75MPa |
Working Pressure | 1.0MPa | 1.6MPa | 2.5MPa | |
Working Temperature | t | normal≤80℃,special≤200℃ |
Suitable Medium | Potable water, fresh water, seawater, wastewater, natural gas, coal gas, oil, acid and alkaline, etc. |
Available Materials made for Butterfly plate used in different medium
Name | Designation | Applied medium |
Ductile cast iron coated with nickel | GGG50 with surface coated or spayed Nickel | Water |
QT500-7 with surface coated Nickel or spayed nylon 11 | GGG50(Nylon 11) | Water/wastewater/ oil |
Stainless steel | CF8, CF8M | Potable water/ water/wastewater/ acid and alkaline |
Aluminum bronze | ZCuAl9Mn2 | Water/wastewater/ seawater |
Nickel-aluminum bronze | ZCuAl9Mn2+Ni | Water/wastewater/ seawater/saline water |
Dimensions and Weight PN:1.0MPa,1.6MPa, 2.5MPa
Packaging & Shipping Polyethylene Bags---- Standart export carton----Wooden case or as per customers' requirement Shipping:Seaworthy 30 days in normal after receipt of the order. It mainly depends on quantity and types of valve Company Information
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