Butterfly Valve ; Three-eccentric Multi-layer Butterfly Valve

Butterfly Valve ; Three-eccentric Multi-layer Butterfly Valve System 1

Butterfly Valve ; Three-eccentric Multi-layer Butterfly Valve

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Loading Port:: China main port

Payment Terms:: TT OR LC

Min Order Qty:: 10 pc

Supply Capability:: 1000 pc/month

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BUTTERFLY VALVE CENTER LINE-TYPE DUCTILE IRON DN50 - DN1000

valve of china 3300

Specification

Material:

Steel

Pressure:

Low Pressure

Temperature of Media:

Normal Temperature

Power:

Manual,Pneumatic,Electrical,Worm gear,Other

Media:

Air / Water / Steam / Coal Gas / Oil Product / Alkali / Saline with low corrosive service

OD（Outer Diameter: inch）:

2000

Size(inch):

406

Pressure（LB）:

Net Weight (kg):

5300

Features
The butterfly valve has the ideal sealing track since following three-eccentric principle, without friction and interference between sealing seats, and also adopts the proper material, which make the butterfly valve have the reliable sealing ability, corrosion resistant, temperature resistant and wearing resistant. The main features as bellow:
1.Small open torque, flexible and convenient, laboursaving and energy economised.
2.Three-eccentric structure to make the disc more and more tighter, with reliable sealing ability and no leakage.
3.High Pressure resistant, corrosion resistant, wearing resistant, long lifetime.

Application Standards
Design standard: CJ/T 261-2007 ; GB/T12238-89
Flange standard: GB/T9113.1-2000 ; GB/T9113.2-2000 ; GB/T9115.1-2000 ; GB/T9115.2-2000 ; HG20596-97

Face-to-face: GB/T12221-1989

Pressure test: GB/T13927-1992 ; JB/T9092-1999

Main Technical Parameter

Nominal Diameter	DN(mm)	‍‍ 50~2000‍‍‍‍‍‍‍‍‍‍‍‍‍‍				50~500
Nominal Pressure	PN(MPa)	0.6	1.0	1.6	2.5	4.0
	Intensity Test	0.9	1.5	2.4	3.75	6.0
	Seal test	0.66	1.1	1.76	2.75	4.4
	Air Test	0.6	0.6	0.6	0.6	0.6
Leakage	<0.1 XDNmm³/s (Conforming to GB/T13927 Standard)
Applicable Temperature	Carbon Steel: -29^oC ~ 425^oC / Stainless Steel: -40^oC ~ 600^oC
Applicable Medium	Air / Water / Steam / Coal Gas / Oil Product / Alkali / Saline with low corrosive service
Method	Worm gear / Pneumatic / Electric

Material for main parts

Parts Name	Material
Body	Castiron / Stainless steel / Cr-Mo steel / Alloy steel
Disc	Cast steel / Alloy steel / Stainless steel / Cr-Mo steel
Seats	Stainless steel / Multi-layer asbestos with temperature resistant
Stem	2Cr13 / Stainless steel / Cr-Mo steel
Bearing	304 nitrification Austenite stainless steel / Cr-Mo steel
Packing	Flexible graphite

Please consult customer service before placing an order( in order to confirm with size and material of the relevant product).

Q:What's the difference between butterfly valves and check valves?: Butterfly valve is manual, only switch function.The check valve is an automatic valve, which prevents backflow of the pipe medium.

Q:What's the difference between an electric two position control valve and an electric butterfly valve?: With manual control device, once the power failure occurs, you can temporarily manually operated, and will not affect the use.The biggest difference is that the electric double bit butterfly valve can not fine adjustment; and the electric butterfly valve can play a regulating role.

Q:How do you draw the butterfly valve in the engineering drawing?: Butterfly valve there are many kinds of painting, mainly designed to draw on the staff, according to the design institute out of the icon.

Q:Who can give me a download UG butterfly valve, needle valve, diaphragm valve standard model address, Japanese standard, American Standard.: Support many 3D CAD format, such as the commonly used UG, Pro/E, SolidWorks......As for the butterfly you said, don't post the link up, the standard JIS, American Standard ANSI, German standard DIN are.You use Baidu Search "LinkAble PARTcommunity", after the open registration, CAD format, such as UG, ASAHI and then to find the manufacturer home page, which is the valve, you said the Japanese standard, German standard, American Standard valve basically all.

Q:Butterfly valve switch direction respectively?: If there is no arrow on the handwheel, the indicator on the turbine has been damaged, you can put your ear on the wall of the pipe, turn the handwheel, and through the sound of the pipe medium to determine the direction of the switch.

Q:Which is better, the round two lobe butterfly valve?: Round type double butterfly butterfly valve is the first choice of Shanghai Machinery & Equipment Co., Ltd., the company is a professional design, manufacture and sale of central air-conditioning products at the end.

Q:I have a good set of #142 Pontiac heads with small diameter valves. I want to have the heads enlarged to accept the larger Pontiac valves, and I have the larger exhaust valves out of #13 heads and the larger intakes from 6X8 heads. The valves appear ok and shiny on the stems: If the valve is burnt there is no longer something you're able to do with it yet replace it. in the event that they simply desire cleansing up you could lap them in with a lapping compound the threat with this is which you would be able to desire to visual exhibit unit which you don't get close to to the sting of the valve, this is once you will finally end up with a burnt valve. The valve should not be flush with the valve seat this is plenty to close and the warmth of combustion could have an more advantageous effect on the textile.

Q:Butterfly valve model D344H and D343 difference: [1] D344H-10C DN400, D343H-10C DN400, to talk about the 2 types of butterfly valves in common: D on behalf of 3 Representatives is butterfly valve, turbine driven, 4 representative is in the middle of flange, representing 10 kg pressure, C is the representative of the valve material is cast steel, DN400 represents the valve diameter; say that there the difference of the 2 models, there is a place where there are differences, second means 4 of the first models is the new type sealing valve structure is variable eccentric, second of the second models of the 3 represents the structure of the valve is three eccentric, and three eccentric seal type variable eccentric in fact, is a meaning.Sealed three eccentric butterfly valve, sealed variable eccentric butterfly valve, corresponding to the central butterfly valve and sealed single eccentric butterfly valve.

Q:does it come in when you go over a certain rpm or do the valves change depending on how far you depress the throtle?: The variable is the valve timing. The spark plug fires a split second before the piston reaches the top of the stroke, to give the fuel a bit of time to burn. But, the faster the piston travels in the bore, that split second gets shorter shorter. So the engine computer changes when the spark plug fires when the valves close, to maximize the power from each ignition stroke.

Q:I did a compression check on my 350 chevy. I have low compression of 175psi on one cylinder.The other seven cylinders range from 195psi to 205psi Could the valves be too tight on the cylinder with 175 psi compression?: Chev engines have hydraulic lifters, keeping the valves adjusted correctly at all times. 20 lbs isn't much to worry about anyway, but if you want dump a little oil (about a tablespoons worth) into that cylinder and recheck it. If the compression jumps up, then your rings are getting weak. If not, you may have a leaky valve.

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