Quadruple Eccentric Butterfly Valve

[use of metalic seal butterfly valve]

The three eccentric and multi level metalic hard seal butterfly valve adopts three dimensional eccentric multi layer metalic seal structure. It is suitable for the metaliclurgical, electric power, petrochemical and water supply and drainage pipes with temperature less than 425 degrees, and the best device for regulating flow and interception.

[features of metalic sealed butterfly valve]

1. The butterfly plate sealing ring of the metalic seal butterfly valve is a soft and hard laminated sheet metalic sheet. It has the dual advantages of metalic seal and elastic seal. It has excellent sealing performance in both low temperature and high temperature.

2. Metal sealed butterfly valve adopts three-dimensional eccentric structure, the seat and butterfly plate almost no friction, with the tighter the sealing function.

3. Metal seal butterfly valve body sealing surface, using surfacing welding stainless steel, cobalt-based cemented carbide, sealing surface wear-resistant, long service life.

4. Metal-sealed butterfly valve has unique structure, flexible operation, labor-saving, convenient, free from high and low medium pressure, reliable sealing performance.

[principle of three dimensional eccentricity structure]

Usually double eccentric butterfly valves, like B (deviating from the center of the pipe) and a (deviating from the center line of the seal face), are designed to reduce the friction between the seat and the seal about 15 stroke, and add a special eccentricity angle beta, which not only overcomes all contact friction between the seal and the valve seat in the valve opening and closing. The service life is increased, and the sealing pressure can be adjusted arbitrarily by changing the applied torque, so that the sealing is more reliable and there is no turning over phenomenon.

[metalic seal butterfly valve - use standard]

Manufacturing standard: JB/T8527-97
Flange standard: Gb9113
Structure length standard: GB12221-89
Test standard: GB/T13927-92

Nominal path	DN(mm)	50~2000				50~500
Nominal pressure	PN(mpa)	0.6	1.0	1.6	2.5	4.0
	strength test	0.9	1.5	2.4	3.75	6.0
test pressure	Seal test	0.66	1.1	1.76	2.75	4.4
	Airtight seal test	0.6	0.6	0.6	0.6	0.6
permeability	0.1*DNmm /S (GB//T13927-92 standard) Carbon steel: -29 C ~425 C; stainless steel, Cr Mo Steel: -40 C ~550 C Air, water, steam, gas, oil and acid, alkali and salt have weak corrosive media. Worm and worm drive and electric drive
temperature
Applicable medium
Driving form

Metal seal butterfly valve - main parts material

Valve body: carbon steel, stainless steel, chrome molybdenum steel, alloy steel.

Stem: 2Cr13, 1Cr13 stainless steel, chrome molybdenum steel
Butterfly plate: carbon steel, alloy steel, stainless steel, chrome molybdenum steel.

Bearing: austenitic stainless steel, 304 nitriding

Sealing ring: stainless steel and high temperature asbestos sheet are combined into many levels.

Filler: flexible graphite

Pair of pinch metal seal butterfly valve

[performance parameters for pinch metal seal butterfly valve]

Model：D373H-10C~40,D373Y-10C~40,D373H-10P~40,D373Y-10P~40
Work pressure (MPA) 1.0~4.0
Applicable temperature (centigrade) less than 300
Suitable for medium water, oil, steam, etc.
Material body, sphenoidal cast steel austenitic stainless steel
Valve stem 40Cr austenitic stainless steel
Sealing Matching Matching Material Stainless Steel/Stainless Steel/Stelli
Fillings of flexible graphite polytetrafluoroethylene
[performance parameters of flanged metal seal butterfly valve]
Design standard: GB/T12238-1989
Flange connection dimensions: GB / T9113.1-2000; GB / T9113.2-2000; GB / T9115.1-2000; GB / T9115.2-2000;
Structure length: GB/T12221-1989
Stress test: GB/T13927-1992; JB/T9092-1999