Flanged Butterfly Valve

Model NO




Work Pressure

Low Pressure (Pn<1.6mpa)


Customer Request

TWT, an industry pioneer in valve research, development, and manufacturing, proudly presents its flanged butterfly valve. With a steadfast commitment to excellence, TWT has established itself as a leading manufacturer of high-quality valves for diverse industrial applications. Our flanged butterfly valve embodies the company’s unwavering dedication to durability, reliability, and performance.

Robust Construction for Demanding Environments

Crafted from superior-grade ductile iron, TWT’s flanged butterfly valve is built to withstand the rigors of demanding industrial environments. The robust construction ensures exceptional resistance to corrosion, wear, and high pressure, making it suitable for a wide range of applications, including water treatment, chemical processing, and oil and gas industries.

Product Description

The TWT flanged butterfly valve is meticulously designed to provide precise flow control and leak-tight sealing. The valve’s disc is engineered with a resilient EPDM seat, ensuring a secure closure and minimal pressure loss. The precise disc positioning and tight sealing capabilities enable efficient flow regulation and prevent unintended fluid leakage, minimizing operational downtime and maintenance requirements.

Ease of Installation and Maintenance

Recognizing the importance of efficient plant operations, TWT’s flanged butterfly valve is designed with ease of installation and maintenance in mind. The compact and lightweight construction simplifies the installation process, reducing labor costs and downtime. Additionally, the valve’s modular design allows for quick and convenient maintenance, minimizing disruptions to your production schedule.

Basic Information

Driving ModeManualConnection FormFlange
StructureDouble-Eccentric SealingSeal FormAuto Sealed
Valve StemNormalWork PressureLow Pressure (Pn<1.6mpa)
Working TemperatureNormal Temperature (-40°C<T<120°C)Material of Seal SurfaceSoft Sealed
Valve BodyCastingStandardAPI609/DIN3354/BS5155/En593
ApplicationIndustrial Usage, Water Industrial Usage, Household UsageOEM&ODMCustomer Request
Factory History65 Production HistoryOperationWorm gear
DesignEn593Flange DrillingEn1092 Pn16
Face to FaceEn558 13 SeriesCoatingEpoxy
MaterialsDuctile IronCertificationISO/CE/BV
Warranty18 MonthesTransport PackageExport Plywood Box


Product Description

Nominal Diameter: DN150-DN3600
Nominal Pressure: 10Bar/16Bar/Class 150
Design Standard: API609/EN593/BS5155/DIN3354
Face to face: ASME B16.10,EN558,DIN3202,ISO5752
Flange Connection: ASME B16.1 / ASME B16.47, AWWA C207, EN1092/BS4504
Inspection and Test: EN12266-1/API 598/ISO5208
Top flange: ISO5211

Material List:

1. Body:Ductile Iron: ASTM A536 / GGG40
2. Disc: ASTM A536 / GGG40
3. Stem :Stainless Steel: ASTM A182 304/316/431 / Duplex Stainless Steel

Other Description

Installation without restriction in direction of flow.
Reduced weight and overall dimensions.
Low pressure loss and reduced energy costs.
High KV / CV values.
Easy to clean and disinfect for potable water systems etc.
Self cleaning (no residue will be trapped).
Good resistance to corrosion.
Manul , electric actuator , pneumatic actuator , hydraulic actuator , bare shaft is optional
Wate , drinking water , portable water , Oil , sea water , gas are all available working service.
Size is from DN150-DN3600

Technical Specification

1Design and manufacturing   StandardAPI609/EN593/BS5155/DIN3354
2Pressure-Temperature RatingPN6,PN10,PN16, Class125, Class150
3Structure length(Face-Face)ASME   B16.10,EN558,DIN3202,ISO5752
4Flange EndsASME   B16.1 /ASME B16.47,AWWA C207,EN1092/BS4504ASME B16.1 /ASME B16.47,AWWA   C207,EN1092/BS4504
5Inspection&TestAPI598, EN12266-1
6ConnectionFlange type
7Fluid mediumWater, Oil, Gas and various   corrosive media,drinking water ,portable water , sea water
8Operation optionWorm Gear,electric and   pneumatic control device.
9Applicable sizeDN100 ~ DN3600
10Using temperature-10ºC ~ 150ºC
11Normal Pressure(Mpa)PN1.0 ~   2.5MPa(Class150,Class300)
12Connection standardANSI·DIN·API·ISO·BS
13Warranty18 monthes


Main Material

1BodyDI(A536 65-45-12),GGG40,GGG502DiscDI(A536   65-45-12),GGG40,GGG50/Aluminum bronze,duplex stainless steel
3Up/ Down ShaftStainless Steel(304,416,   420,431) duplex stainless steel4Disc Sealing RingEPDM, NBR
5Body Sealing RingEPDM, NBR6Taper pinStainless   Steel(304,416,420,431)
7Up/ Down Shaft sealing RingNBR8Up/Down BushingDF-1
9Disc Sealing Steel RingSS31610KeySteel
11PackingNBR12YokeDI(A536 65-45-12)

Company Profile

Our Advantages

• More than 60 years of valve production experience
• with advanced processing equipment
• large testing laboratories
• and sufficient raw material reserves


Q1.Whether it is a factory?
A:yes, we are China’s leading valve manufacturer and supplier with more than 60 years of valve production experience since 1956
Q2.Can i have any own customized product?
A:yes you are customized requirements for standard,size,colour,packing,nameplate,mark,etc
Q3.Do you provide samples?
A:yes we can provide the samples but do not pay the charge of freight
Q4.What’s your terms of payment?
A:30% in advance 70% balance before shipment
Q5.Is there any testing equipment
A:Yes, we have pressure testing equipment, and large-scale laboratories and non-destructive testing equipment