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Worm -gear Flange hard seal butterfly valve

Categories Hard sealing butterfly valve
Standard or Nonstandard: Standard
Structure: Butterfly
Pressure: Low Pressure
Power: Manual
Material: Casting
Temperature of Media: Medium Temperature
Media: Water
Port Size: DN40-1200mm
color: optional
material: optional
medium: optional
Packaging Details: Favorable price + excellent quality + various sizes
Delivery Time: 40 days after payment
Payment Terms: L/C,T/T,Western Union,MoneyGram
Supply Ability: 1500 Piece/Pieces per Month
MOQ: 1 Piece/Pieces
  • Product Details
  • Company Profile

Worm -gear Flange hard seal butterfly valve

worm-gear ductile iron butterfly valve
Reliable bubble tight shut off
Zero shaft leakage
Good quality

Worm -gear Flange hard seal butterfly valve

Characteristic of product :

1. Three eccentric seal structure, seat and disc almost no wear, with the Seal ring made of stainless steel, with dual benefits of metal seal and flexibility. No matter in the case of low temperature or high. Both with excellent sealing properties, resistant to corrosion, and long service life.

2. Disc sealing surface using cobalt-based alloy welding, sealing surface wear resistance and long service life

3. Large size disc using lattice structure, high strength, flow area large, small flow resistance.

4. The valve has a two way sealing function, the installation media from the flow restriction are not subject to the impact of spatial location. Can be installed in any direction

More information :

Pressure Temperature Ratings

working pressure


testing pressure



working temperature

-20 degree to 110 degree EPDM seat

-10 degree to 80degree NBR seat

suitable media


Material Specification




Valve Body

cast iron

A126 Class B

ductile iron

A536 Gr.65-45-12

Valve Disc

ductile iron

A536 Gr.65-45-12


B148 C95400

stainless steel 304

A351 CF-8

stainless steel 316

A351 CF-8M

Valve Shaft

stainless steel 410

A276 S 410 00

stainless steel 431

A276 S 410 00

Valve Seat Ring







B62 C83600

Our factory:


Exhibition hall:

Relevant certificates:

About us :

Tianjin Kay Darth Wei Valve Co.,Ltd specializes in manufacturing butterfly valves.Customers can buy or wholesale different items at one time by combine goods together.We can design the products according to your special request. Tianjin Kay Darth Wei Valve Co.,Ltdsincerelywelcome your inquiring

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