What is D343H triple eccentric metal seal flange butterfly valve?

The full name of D343H is triple eccentric metal hard sealing worm gear box operated flange butterfly valve, which is one of kind triple eccentric designed butterfly valve, can be used in high temperature and high pressure industrial pipelines. today we are going to introduce some details about that D343H triple eccentric metal seal flange butterfly valve.

Technical parameters of D343H metal seal triple eccentric flange butterfly valve: 

Nominal diameter: DN50-DN1000

Nominal pressure: 1.0-4.0Mpa. 

Working temperature: -29-425℃

Flow direction: uni-direction/bi-direction

Operating device: worm gear box 

Design standard: MSS-SP-68

Sealing structure: triple eccentric metal hard sealing structure 

Body material: WCB, CF8, CF3, CF8M, CF3M. 

Applicable mediums: water, steam, petrochemical, corrosive mediums,etc; 

Customization: Available; 

Brief introduction of metal seal triple eccentric flange butterfly valve: 

The full name of D343H is triple eccentric metal hard seal worm gear box operated flange butterfly valve; 

The D343H triple eccentric metal seal butterfly valve is installed in the diameter direction of the pipeline. Inside the valve body, the butterfly plate rotates around the valve shaft from 0° to 90°. when the valve plate rotates to 90°, the butterfly valve is in full open state. D343H triple eccentric metal seal flange butterfly valve is designed to be used for high temperature high pressure pipelines to connect,shut off or regulate the flow rate, which has been widely used in many industrial fields such as petroleum, chemical industry, metallurgy, hydro-power,etc. 

Advantages of metal seal triple eccentric flange butterfly valve: 

① D343H metal hard seal butterfly valve adopts a triple eccentric sealing structure, there is almost no wear between the valve seat and valve disc, when the disc is closing, it seals more and more tight; 

② the sealing ring of the D343H triple eccentric metal seal butterfly valve is made of stainless steel, which has  the dual advantages of metal hard sealing and elastic sealing. It has excellent sealing performance under low temperature and high temperature, has corrosion resistance and long service life; 

③ the sealing surface of the butterfly plate is made of cemented carbide, which is wear-resistant and has long service life; 

④ large diameter triple eccentric metal seal butterfly valve adopts quilted frame structure, which has high strength, large flow area and small flow resistance; 

⑤ the metal hard sealing butterfly valve has bidirectional sealing function. It is not restricted by the flow direction of the medium during installation, nor is it affected by the spatial position. It can be installed in any direction; 

⑥ the drive device of triple eccentric metal seal butterfly valve can be installed in multiple positions(rotating 90° or 180°), which is convenient for customers to use. 

Material for different components under different mediums: 

Part name	Material
Valve body and disc	WCB(for water, oils or non corrosive mediums)/CF8,304(for Nitric acid series mediums)/CF3M,316L(for Acetic acid mediums)
Valve stem	2Cr13(for water, oils or non corrosive mediums)/304(for Nitric acid series mediums)/316L(for Acetic acid mediums)
Sealing surface of body	Butt welded 507
Sealing surface of disc	304+flexible graphite(for water, oils or non corrosive mediums)/304+PTFE(for Nitric acid series mediums and Acetic acid mediums)
Packing	flexible graphite(for water, oils or non corrosive mediums)/PTFE(for Nitric acid series mediums and Acetic acid mediums)

Types of D343H triple eccentric metal seal flange butterfly valve: 

D343H-10P,D343H-16P,D343H-25P,D343H-40P,D343H-10R,D343H-16R,D343H-25R,D343H-40R

Belo Valve is a professional manufacturer for butterfly valves, like soft sealing butterfly valves, metal sealing butterfly valves, concentric butterfly valves, eccentric butterfly valves, wafer type butterfly valves, wafer lug type butterfly valves, flange butterfly valves, manual lever handle operated butterfly valves, electric actuated butterfly valves, pneumatic actuated butterfly valves, cast iron butterfly valves, cast steel butterfly valves, ductile iron butterfly valves, WCB butterfly valves, stainless steel butterfly valves.

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