Triple eccentric extended stem butterfly valve

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Triple Eccentric Butterfly Valve

Customizable, the triple-eccentric extended-stem butterfly valve features an advanced structure and reliable sealing, offering high performance. The triple-eccentric design allows for virtually frictionless disc opening and closing, ensuring extended seal life. The extended stem facilitates operation in underground pipelines, deep wells, and locations with thick insulation, ensuring valve reliability while facilitating installation and maintenance.

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I. Triple Eccentric Features of Extended Stem Butterfly Valve

　　1 Extended Stem Butterfly Valve Adopting a triple eccentric sealing structure, the valve seat and butterfly plate have almost no wear, and it has a tighter sealing function. ;

　　2 The sealing ring is made of stainless steel, which has the dual advantages of metal hard sealing and elastic sealing. It has excellent sealing performance under both low and high temperature conditions and is corrosion-resistant. , Long service life and other characteristics ;

　　3 The sealing surface of the butterfly plate is made of surfacing cobalt-based hard alloy, which is wear-resistant and has a long service life. ;

　　4 The large-size butterfly plate adopts a truss structure, which has high strength, large flow area, and small flow resistance. ;

　　5 This valve has a two-way sealing function, and the installation is not restricted by the medium flow direction, nor is it affected by the spatial position, and can be installed in any direction. ;

　　6 The drive unit can be multi-position ( rotation 90° or 180°) Installed for easy user use.

II. Triple Eccentric Main Technical Parameters of Extended Stem Butterfly Valve

Nominal diameter	DN(mm) 100-3000
Nominal pressure	PN(MPa)	0.6	1.0	1.6	2.5	4.0
Test pressure Ps(MPa)	Strength test	0.9	1.5	2.4	3.75	6.0
	Sealing test	0.66	1.1	1.76	2.75	4.4
	Air tightness test	0.6	0.6	0.6	0.6	0.6
Applicable medium	Water, steam, oil, acid corrosion, etc.
Applicable temperature	Carbon steel: '-29' ℃ ~425 ℃ Stainless steel: '-40' ℃ ~600 ℃

IV. Triple Eccentric Main Parts Material of Extended Stem Butterfly Valve

Part Name	Material
Valve body	Cast iron, cast steel, stainless steel, chrome molybdenum steel, alloy steel
Butterfly plate	Cast steel, alloy steel (hard chrome plated), stainless steel, chrome molybdenum steel
Sealing ring	Stainless steel, poly-internal ester, anti-wear material
Valve stem	2Cr13、1Cr13 Stainless steel, chromium molybdenum steel
Packing	Flexible graphite