DN1800 PN25 Eccentric Butterfly Valve

Butterfly valves are quarter-turn valves that regulate fluid flow by using a disc or plate located within a pipe. Double eccentric butterfly valve, also known as high-performance butterfly valve, is characterized by two offset points in the center line of the valve shaft. The main difference between the different types of butterfly valves is the arrangement of the disc and shaft.

Among them, the DN1800 PN25 eccentric butterfly valve provided by TWT is a type of double eccentric butterfly valve. It is carefully made of high-quality ductile iron and strictly adheres to and complies with strict industry standards to ensure the highest reliability and performance.

There is also a triple eccentric butterfly valve. The triple offset design introduces a third offset – the offset of the sealing element itself. This configuration eliminates frictional contact between the disc and seat during opening and closing, reducing wear and extending the service life of the valve.

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

No	Item	Standard
1	Design and manufacturing   Standard	API609/EN593/BS5155/DIN3354
2	Pressure-Temperature Rating	PN6,PN10,PN16, Class125, Class150
3	Structure length(Face-Face)	ASME   B16.10,EN558,DIN3202,ISO5752
4	Flange Ends	ASME   B16.1 /ASME B16.47,AWWA C207,EN1092/BS4504ASME B16.1 /ASME B16.47,AWWA   C207,EN1092/BS4504
5	Inspection&Test	API598, EN12266-1
6	Connection	Flange type
7	Fluid medium	Water, Oil, Gas and various   corrosive media,drinking water ,portable water , sea water
8	Operation option	Worm Gear,electric and   pneumatic control device.
9	Applicable size	DN100 ~ DN3600
10	Using temperature	-10ºC ~ 150ºC
11	Normal Pressure(Mpa)	PN1.0 ~   2.5MPa(Class150,Class300)
12	Connection standard	ANSI·DIN·API·ISO·BS
13	Warranty	18 monthes

 

Main Material

No	Part	Material	No	Part	Material
1	Body	DI(A536 65-45-12),GGG40,GGG50	2	Disc	DI(A536   65-45-12),GGG40,GGG50/Aluminum bronze,duplex stainless steel
3	Up/ Down Shaft	Stainless Steel(304,416,   420,431) duplex stainless steel	4	Disc Sealing Ring	EPDM, NBR
5	Body Sealing Ring	EPDM, NBR	6	Taper pin	Stainless   Steel(304,416,420,431)
7	Up/ Down Shaft sealing Ring	NBR	8	Up/Down Bushing	DF-1
9	Disc Sealing Steel Ring	SS316	10	Key	Steel
11	Packing	NBR	12	Yoke	DI(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

FAQ

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