Butterfly Valve DN450 D373H-16C D343H-6C D343H-10C D343H-16C H343H-25C

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Butterfly valve, also called the flap valve is a kind of simple structure of the regulator, 

also can be used in low pressure pipeline medium valve butterfly valve in the switch 

control the way work is closed a (disc or disc) is a disk, around the axis of rotation to

achieve a valve open and close, mainly in the line cut off and throttling effect.

Butterfly valve opening and closing is a disc-shaped butterfly plate, the body rotation 

around its own axis, so as to achieve the aim of opening and closing or adjust.

Introduction to the

Butterfly valve, butterfly valve) : also called butterfly valve worm gear
Definition: open-close part for disc butterfly plate and a valve body axis rotate.[1]
Structure: mainly by the valve body, valve stem, disc and seal ring.The body is 

cylindrical, short axial length, built-in butterfly plate.
Using range
Electric butterfly valve butterfly valve is suitable for the generator, gas, 

natural gas, liquefied petroleum gas, city gas, cold hot air smelting, chemical 

industry and power generation, environmental protection, such as, building

water supply and drainage engineering system of conveying a variety of corrosive,

non corrosive fluid pipe, used to adjust and block the flow of the medium.
Functional purposes
Pneumatic butterfly valve butterfly valve (English: butterfly valve) is to point 

to shut down a (disc or disc) is a disk, around the axis of rotation to achieve 

a valve open and close, mainly in the line cut off and throttling effect.Butterfly 

valve opening and closing is a disc-shaped butterfly plate, the body rotation around

its own axis, so as to achieve the aim of opening and closing or adjust.Butterfly valve 

fully open to the barrier is usually less than 90 °, butterfly valve and the adjustment 

lever itself has no self-locking ability, in order to butterfly plate positioning, to add 

worm gear reducer on the valve stem.The use of worm gear reducer, can not only 

make the butterfly plate with self-locking ability, make the butterfly plate to stop at

any position, also can improve the performance of the valve.Industrial specialized 

characteristic ability of high temperature butterfly valve, apply pressure range is higher also, 

nominal valve size is big, the body is made of carbon steel, valve plate seal using metal ring 

instead of rubber ring.Large high temperature butterfly valve USES the steel plate welding 

manufacturing, mainly for the duct smoke and gas of high temperature medium.


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Q:What is the national standard for clip butterfly valves?
GB/T 12238-2008 "flange and clip connection elastic seal butterfly valve"GB/T 26144-2010 flanged and clip on steel lined fluoroplastic butterfly valvesJB/T 8527-1997 "metal sealed butterfly valve"
Q:What does butterfly valve nps12cl150d373f4-150lb stand for?
NPS (Nominal, Pipe, Size) abbreviation. Refers to the connection (including flanged and welding end) of the nominal diameter, followed by a digital unit is American Standard inches, 12 inches.NPS12 labeling system.CL is the abbreviation for class, and LB150 means the pressure is 150 poundsD stands for butterfly valves3 is expressed in the form of a turbine drive7 means of connection: to clip3 means sealing: 3 eccentricF4: the sealing material is PTFE
Q:Read your answer, about pneumatic butterfly valve solenoid valve selection
The valve (including the valve, butterfly valve, etc.) are equipped with pneumatic actuators are standard (including restrictor valve positioner of the electromagnetic valve is connected with the installation.) is the international standard NAMUR standards, in the standard of inside electromagnetic valve is G1/4, of course, this is the solenoid valve installation in the NAMUR interface of the driver on the situation, if the solenoid valve is not installed on the drive, but through the trachea installed in a few meters away, it would have to choose a larger size, how to choose? Depends on the switching speed of the valve requirements, such as drive gas consumption is 2L, need to open in 1S, the electromagnetic the valve requires the flow of 120L/min, plus the line loss and acceleration, 500L/min is enough.
Q:Model specification for butterfly valves
1. classification by structure(1) Central sealed butterfly valve (2) single eccentric sealed butterfly valve (3) double eccentric sealed butterfly valve (4) three eccentric sealed butterfly valve2. by secret cover material classification(1) soft sealing butterfly valve. (2) metal hard sealing butterfly valve.3. classified by seal type(1) forced sealing butterfly valve (2) pressure sealed butterfly valve. (3) automatic sealing butterfly valve. The pressure of the seal is automatically generated by the pressure of the medium.4. classification by work pressure(1) vacuum butterfly valve. Butterfly valve with lower working pressure than standard atmosphere. (2) low pressure butterfly valve. Butterfly valve with nominal pressure PN<1.6MPa. (3) medium pressure butterfly valve. Butterfly valve with nominal pressure PN 2.5--6.4MPa. (4) high pressure butterfly valve. Nominal pressure PN is 10. 0--80.0MPa butterfly valve. (5) ultra high pressure butterfly valve. Butterfly valve with nominal pressure PN>100MPa.5. classification by operating temperature(1) high temperature butterfly valve. T>450 degrees C butterfly valve (2) medium temperature butterfly valve. 120 C6. classification by connection1 pairs of clip butterfly valve2, flange butterfly valve (3) lug butterfly valve. (4) welded butterfly valve.
Q:What does the butterfly valve model d344h, d345h, d346h, d347h mean?
According to the international standard of the letters and numbers apart to explain D344H D is a unit of butterfly valve, two unit 3 is driving mode: turbine, three unit 4 connection: flange connection, four unit 4 Structure: seal type linkage, five unit H sealing material: Cr13 stainless steelD345H compare yourself to the above. Unit 5 four is a sealed, single eccentric structureD346H four unit 6 is an unsealed center vertical plateD347H four unit 7 is unsealed double eccentricIn general, there is only one difference between them: the structural form is different!
Q:What does "10" in the butterfly valve "D71X-10" mean?
The pressure of 10 kg 1.0MPA is usually cast iron
Q:What is an electric two position butterfly valve?
It's an electric valveProduct brief:  Electric double position butterfly valve, this product is connected with flange type, clip type. Material: cast iron, carbon steel, stainless steel, 304/316Product overview   Electric double position butterfly valve (soft seal) is suitable for temperature less than 200 DEG C, adjust the flux and closure of the role of the medium nominal pressure is less than 1.6MPa of food, medicine, chemical, petroleum, electric power, textile, papermaking, water supply and drainage, gas pipeline.  main features1 reasonable and novel design, unique structure, light weight, rapid opening and closing.2 operating torque is small, easy to operate, saving smart.3 can be installed in any position, convenient maintenance.4 seals can be replaced, reliable sealing performance to achieve two-way seal zero leakage.5 sealing material aging resistance, corrosion resistance, long service life etc..Electric double position butterfly valve adopts standardDesign standard: GB/T12238-1889Flange size: GB/T9113.1-2000; GB/T9115.1-2000; JB78Length: GB/T12221-1889Pressure test: GB/T13927-1992; JB/T9092-1999
Q:How to connect the signal butterfly valve?
If you mean the signal of fire water supply system, there are generally three outlets, one public, one open and one off. Fire control system signal butterfly valve is normally open, so the signal butterfly valve to open position, with a multimeter to measure the 2 lines, the 2 lines into the input module is fine.
Q:Butterfly valve D41W-1, 41, W, 1, respectively, what does that mean?
D--- stands for butterfly valves; 4--- refers to the form of flange connections; 1--- refers to the valve stem and disc in the center of the valve line, without eccentricity; w--- refers to the valve seat material and body material is the same, usually carbon steel. The final 1--- refers to the nominal pressure of 1 kg / cm2.
Q:Butterfly valve sealing material has several?
9: H- stainless steel composite layerX3- ethylene propylene rubberX4- chloroprene rubberX5- nitrile rubberX6- abrasion resistant rubberX7- fluorine rubberX8- silicone rubberX9- heat resistant ethylene propylene rubberF- PTFE

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