Flexible Flanged Concentric Butterfly Valve

Flexible Flanged Concentric Butterfly Valve

Basic information
Basic information
This valve is suitable for intercepting and adjusting the general corrosive, non-corrosive gas, liquid, semifluid, and solid powder media, and also can be used as replacement products for old pipeline renovation, maintenance, and matching valves.
Features
Features
1. Short connection size saves space;
2. No extenders required, cost savings;
3. High-quality rubber material ensures seal performance;
4. Easy to operate.
Principle
Principle
This valve is a flange connection, its main characteristic is the structure length can expand, is advantageous installs on the long pipeline to absorb the hot expansion cold shrinkage or the balance pipeline vibration influence, because has the long stretching leeway, therefore omitted the expansion and contraction. Cylindrical channels in butterfly valve body, disc around the axis of rotation, rotation Angle for 0 ° ~ 90 °, rotate to 90 °, the valve is fully open.
Installation and Commissioning
Installation and Commissioning
The concentric butterfly valve is long stored, should be kept in a cool and dry place, valve plate in an open state of 5 ° ~ 10 °, seal and cover on both ends, with the packing can be overlapped implantation, disc installed in pipeline diameter direction, average installation. For specific use, please consult ZhengFeng Valve Group.

Part

Material

Standard

Body

Ductile Iron

EN 1563/DIN 1693

Expansion Piece

Ductile Iron

EN 1563/DIN 1693

Trim

Stainless Steel 431

EN10088-1/ASTM A959

Seat

Stainless Steel 431

EN10088-1/ASTM A959

Sealing

EPDM / NBR

ISO 4633

Worm Actuator

Ductile Iron

EN 1563/DIN 1693

For the materials options not listed, consult factory.

ZhengFeng manufactures valves in more than 50 different alloys.

Product scope, Standards & Materials
Size Range: 2"~48"
Pressure Rating: 10bar ~ 25bar
Face to Face Dimensions: AMSE B16.10, EN558-1
Flange End Dimension: AMSE B16.1/16.42, AS4087, EN1092-2
Coating: Fusion Bonded Epoxy Coating
Inspection and Test: ISO 5208 / EN 12226-2

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