Electric Automatic Modulating REC Damper for Air, Flus Gas,Coal gas

Product Introduction

Dampers are our main products, monthly exported to Mid East, Southeast Asia and Russia...

With Introduced Technology, Durable Quality and Stable Performance.

Widely applied in automatic industry, especially power plant, cement mills, metallic mills, food industry, chemical industry.....

Below is our Hard Seal Type Butterfly Damper Instruction

1. Summarize

Butterfly Dampers function as open-close part in the rotating circular butterfly disc with valve stem, could achieve the opening and closing of the valve. Butterfly valves for shut-off valve can also be designed to make regulation and truncation.

Three eccentric hard seal butterfly damper has no mechanical wear, could achieve zero leakage. Used for throttling or shutting off the flow of corrosive or non corrosive gases, liquids and semi liquid. It can installed in any selected position in pipelines in the industries of petroleum processing, chemicals, food, medicine, textile, paper making, hydroelectricity engineering, building, water supply and sewage, metallurgy, energy engineering as well as light industry.

2. Main Performance Parameter

Model	D643H-10C
Nominal Pressure	0.25 Mpa	0.1Mpa	0.6 Mpa	1.0 Mpa
Shell Test Pressure	0.375 Mpa	0.15Mpa	0.9 Mpa	1.5Mpa
Seal Test Pressure	0.275 Mpa	0.11Mpa	0.66 Mpa	1.1Mpa
Actuating Way	Electric
Air Supply	0.4-0.6MPa
Leakage Rate	Zero
Temperature	≤350°C
Medium	Gas, Air, Combustible Gas, Water, Oil, Steam

3. Main Part Material

Name	Valve Body	Valve Disc	Seal	Stem
Material	Carbon Steel	Carbon Steel	Stainless Steel	Stainless Steel

4. Structure Feature

4.1 Fluid resistance is small. And for middle and large size butterfly valve, the effective area is larger when fully opened.

4.2 Simple structure, smaller size, lighter weight.

4.3 Triple Eccentric

The stem axis offsets a certain size with the sealing surface of the disc; the sealing surface of the disc offsets a certain size with the axis of the passage of the valve body; the passage of the valve body offsets an eccentric angle with the rotation axis of valve seat. Therefore, the valve is called three-eccentric butterfly valve. When butterfly valve opens from 0 ° to 90 °, butterfly valve sealing surface will immediately detach from the seat sealing surface; When it closes from 90 ° to 0 °, only at the off moment the conical sealing surface of butterfly disc will contact and compact the conical sealing surface of valve seat. So there is no friction between the sealing surface of the valve seat and the disc, which would avoid any possibility of wear and leakage.

If you have any question or any need, just feel free to contact. I’ll reply you asap.

Bonnie

Company Introduction

China Bell Automatic Group is the leader of automatic industry, specialized in manufacturing automatic products and equipments, owns many world advanced technology and many manufacturing factories and many famous brands. Tianjin Bell Automatic Instrument Technology Co., Ltd is the subordinate company of China Bell Automatic Group, has forty years manufacturing and technical experience, is the most professional manufacturer in various control valves, actuators and instruments. Bell Automatic has got the ISO quality certificate, EU CE certificate, various quality certificates and many certificates of honor issued by Chinese government.

Factory facilities

Honors and Certification