Ductile Iron Butterfly Valve Of China is on Sale

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Tianjin
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50 set
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1000 set/month

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1. Manual Wafer Butterfly Valve Description

A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required. The disc is positioned in the center of the pipe, passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, therefore a pressure drop is always induced in the flow, regardless of valve position.

 

2.Main Features of the Manual Wafer Butterfly Valve 

a)Cast hole. Flange connection meet ANSI 125/150#   DIN PN10/16   BS4504 PN10/16 in the meanwhile.

 

b)Soft seat. Replaceable. Increase of service life.

 

c)Double half shaft without pin.

 

d) Square and short neck. Easy to stick scutcheon and cost saving.

 

3. Manual Wafer Butterfly Valve Images

 Ductile Iron Butterfly Valve Of China is on Sale

Ductile Iron Butterfly Valve Of China is on Sale

4.Manual Wafer Butterfly Valve  Specification

 

Ductile Iron Butterfly Valve Of China is on Sale 

5.FAQ

 

1. What is manual wafer butterfly valve?

A: Wafer style is the more common of the two and is less expensive than the lug style. The wafer style butterfly valve is just about the standard. It ís so common that no one even bothers to use the word "wafer" when ordering a butterfly valve. It is taken for granted that if a butterfly valve is ordered, a wafer style will be received.

 

2. How about the Installation of the Wafer Style Butterfly Valve?
A: Butterfly valves are installed by inserting the valve between two flanges using bolts or studs and nuts to hold it all together. This type of installation, of course, makes it impossible to disconnect just one side of the piping system from the valve. That benefit is received using the lug style valve.

 

3. What is the working principle of manual wafer butterfly valve?

 A: A butterfly valve is from a family of valves called quarter-turn valves. In operation, the valve is fully open or closed when the disc is rotated a quarter turn. The "butterfly" is a metal disc mounted on a rod. When the valve is closed, the disc is turned so that it completely blocks off the passageway. When the valve is fully open, the disc is rotated a quarter turn so that it allows an almost unrestricted passage of the fluid. The valve may also be opened incrementally to throttle flow.




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Q:What is the KVS in the valve parameter?
The valve Kvs is to reflect the passing capacity of the valve, which is defined as the pressure at both ends is 1bar, through the flow of the valve, Kvs is a characteristic parameter of the valve, and valve structure, is a constant value.
Q:How big valves are used in a DN159 pipe?
Nominal diameter DN150 corresponds to the outer diameter of De159To say DN159 is wrong, because DN is the nominal diameter (diameter in the middle of the tube wall)De159 refers to the outside diameter (outside the diameter of the wall)DN39 should be DN32. Nominal diameter 32, outer diameter 39.
Q:The valve is rusty and can not be opened. What shall I do?
Spray with rust removing agent on the rusty rotating parts of the valve. Then use an afterburner to make a tentative rotation. Open it and turn it in the opposite direction. And then spray rust remover. Repeat this several times, and the valve will probably open. Seriously rusty valve, if it really can not open, simply replace it.
Q:Where is the filling portion of the valve?
Along the stem to find, stem into the valve can not see, invisible place, here is the filler. Popular bar!
Q:Valve should be strictly marked according to the direction of instructions and media flow direction to determine the installation direction,
Strength of the corresponding meaning is: the valve used to connect the original way of normal connection, such as silk mouth with the same specifications of the silk mouth connection. You can't connect the wires with different sizes.The pipe clamp is fixed in the counterpart application, from the interface at 200mm was measured with a ruler, when the nominal diameter is less than 100mm, the tolerance of sigma <1mm, when the nominal diameter is greater than 100mm, tolerance for a <2mm, but the length of tolerance is less than 10mm, no strong counterpart or eccentric pad counterpart.
Q:Why is copper used in cryogenic valves?
The rigidity of copper is better, and the friction parts are not easy to produce adhesion. The influence of temperature on copper is smaller than that of steel. Especially in the valve stem, there is also the important gear part, copper!
Q:How can the valve actuators be classified?
The boring actuator, that is, the pneumatic valve actuator, is described in the customs notesPneumatic valve actuator (three) separately presented. This device is equipped with a piston metal enclosure, linear motion of compressed gas generated by a needle perpendicular to the piston rod into the rotary motion, in order to control plug valve or other device with a rotary deviceSo the Shanghai customs will bring you the list backIn fact, the most important point of distinction or the actuator is pneumatic energy conversion in what form movement of the mechanical energy output, if it is a straight reciprocating, 84123100 is correct, if not belonging to the rotary linear motion, or radians, 841239 correct
Q:The water pipe in the house is broken.
Not recommended against the flood to repair the valve, first you have to be repaired, second may be more complex, it is not easy. I have a bad experience this, take the valve, because it is plastic, and aging, the thread is broken, the new is not on do not have to flow out of the water, get it is. To find the valve, the mess!
Q:What are the production equipment in valve shop?
CNC machining center, double control vertical lathe, CNC lathe, CNC machine tools, heavy vertical double column lathe, spherical lathe horizontal boring machine, surface grinder, cylindrical grinder, lathe, milling machine, hydraulic head full bed, gate valve grinding machine, grinding machine, lathe, radial drilling machine,Powder plasma arc welding machine, thyristor rectifier, DC DC arc welding machine, welding machine, drying machine, trolley type resistance furnace, hook type shot blasting machine, medium pressure compressor, crane, pneumatic label printer, printer, compressed air sprayer spraying water line, air pressure box type resistance furnace. Forklift lifting platformLow temperature test equipment, metal and low temperature impact test machine, quantitative spectrometer imported carbon sulfide analyzer, microcomputer analyzer, spectrum analyzer, X-ray flaw detector X-, permeability detector, magnetic particle detector, ultrasonic thickness meter, digital ultrasonic flaw detector, metallographic microscope, hardness tester, precision analysis balance (hydraulic material testing machine), hydraulic valve testing machine hydraulic valve testing machine, submerged valve testing machine, steam trap test machine, valve testing machine, pressure testing machine temperature test machine
Q:What are the major brands of valves abroad?
Fisher (Emerson's brand, pneumatic head and regulating valve is good) mountain Wu (Japan's control valve is doing well)

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