Triple Eccentric Butterfly Valve (Th-btv-te)

Triple eccentric butterfly valve (TH-BTV-TE)

Area of application

Petrochemical, metallurgy, electric power, mechanical equipment, urban pipe network, water treatment, etc.

Data sheet of Triple eccentric Butterfly valve

TYPE:Triple eccentric, Wafer, Lug, Double flange, Welded
SIZE & CONNECTIONS:DN40 to D3000
MEDIUM:Air, Inert Gas, Oil, Seawater, Waste water, Water
MATERIALS:Cast Iron / Ductile Iron/ Carbon Steel / Stainless
Steel / Alu Bronze
PRESSURE RATING:PN10/16/25/40/63/100, Class 150/300/600/900/1500
TEMPERATURE:-196A C to 800A C
SEAT/LINING:SS+graphite, PTFE+graphite,
Metal to Metal, SS+STL
CERTIFICATES & APPROVALS:DNV-GL, Lloyds, DNV, ABS, BV Type Approval
3.1 & 3.2 Cert (on request)
Standards

Design and Manufacture Conform to API609
Flange dimensions Conform to ASME B 16.5, BS, DIN, JIS
Face to Face dimensions Conform to ASEM B 16.10, API 6D
Topworka s dimensions Conform to ISO5211
Testing Conform to API 598
Material of Parts

PART NAMEMaterial
BODYCarbon steel,
Stainless steel,
Duplex steel,
Alu-Bronze
DISC / PLATEGRAPHITE /SS304 /SS316 /Monel /316+STL
SHAFT / STEMSS431/SS420/SS410/SS304/SS316 /17-4PH /duplex steel
SEAT / LININGGRAPHITE /SS304 /SS316 /Monel /316+STL
BOLTS / NUTSSS316
BUSHING316L+RPTFE
GASKETSS304+GRAPHITE /PTFE
BOTTOM COVERSTEEL /SS304+GRAPHITE
Actuation

Worm-gear/hand-wheel
Electric-actuator
Pneumatic-actuator
Hydraulic-actuator
Triple offset butterfly valve features:

The triple eccentricity refers to the addition of an angular eccentricity on the basis of the double eccentric structure, say, the sealing surface of the butterfly valve is inclined and tapered. Triple eccentric butterfly valve is also called triple offset butterfly valve. We can produce two types, one is triple eccentric multi-layer sealing butterfly valve, and the other is triple eccentric all-metal sealing butterfly valve.

The triple eccentric multi-layer sealing butterfly valve is accomplished by the elasticity of the sealing ring on the valve plate, and the elasticity of the sealing ring is produced by its radial compression and flexibility. The contact surface between the sealing ring and the valve seat is an oblique cone. The contact angle between the sealing ring and the valve seat produces a slight a wedge effecta to make the sealing ring flexible and radially compressed. It is precisely because of the uniform contact between the valve seat and the sealing ring and the flexibility of the sealing ring that the load on the valve seat is even, so that the tightest cut-off can be achieved with the smallest torque. The elasticity generated by the torque makes the valve close tightly, regardless of the flow direction of the medium or the force of the medium.

Structural features of triple eccentric multi-layer sealing butterfly valve:

Double safety structure

No dead zone design

Replaceable sealing pair

Fix the structure evenly.

The characteristic of the triple eccentric hard-to-hard structure is that the outer periphery of the butterfly plate is processed into an outer inclined cone, and the inner side of the sealing valve seat is processed into an inner inclined cone. At this time, the sealing section of the butterfly valve becomes an oval. The shape of the sealing surface of the butterfly plate is therefore asymmetric from top to bottom.

Because the sealing surface is oblique cone shape, the larger side of the disc separated by the stem shaft presses upwards to the valve seat along the large inclined curved surface, and the smaller side discs presses down to the valve along the small inclined curved surface seat. The seal between the butterfly plate sealing ring and the valve seat does not rely on the elastic deformation of the valve seat, but completely relies on the compression of the contact surface to achieve sealing.