Ductile Iron Butterfly Valve On Top Sale

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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 On Top Sale

Ductile Iron Butterfly Valve On Top Sale

4.Manual Wafer Butterfly Valve  Specification

 

1)Size: DN40-DN1400 
2)Material:body-CI/DI/WCB/SS 
disc:DI/CF8/CF8M/C95400 
3)Professional Maufacturer for more than 10 years

PRESENTATION:

1) Sizes:

 DN40mm-DN1400mm

2) Materials:
a) Body: CI(cast iron ,GG25 )/ DI (ductile iron ,GGG40)

b) Disc:  DI / CF8 / CF8M / C95400 
c) Seat:  EPDM / NBR / TEFLON / VITON

 

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:How to suppress the valve?
Valve pressure is generally divided into 2 parts. One is shell pressure test, one is sealing test pressureShell pressure test is 1.5 times the pressure of the valve. For example, the pressure on your valve is 16 pressure. Then the shell test pressure will reach 24 pressureThe pressure on the seal is 1.1 times the pressure of the valve. For example, the pressure on your valve is 16 pressure. Then the pressure test on the seal will reach 17.6 pressure. That's all right.
Q:Which direction is the valve? Which direction is it?
Ball valve: handle and Guan Daocheng 90 degrees for the pass, 180 degrees to open (ie in line with the direction of the pipe open)The gate: clockwise, counterclockwise.
Q:Several problems about valve parameters
FV: flow control valveLV: level control valveCV: flow coefficient flow coefficient CvFlow coefficient of an imperial unit. Is equal to the temperature of 40 degrees Fahrenheit Fahrenheit water in -100 1psi (6894.8Pa) 1min flows through the valve pressure drop US gallonThe domestic habits called Kv, Kv said that the valve flow capacity, it is defined as: when the control valve fully open, the valve pressure difference at both ends of a P 100KPa, R 1gf/cm3 (severe fluid that is often warm), per hour through the number of flow control valves, with m3/h or t/h.Cv=1.167Kv
Q:What valve is the DN 25?
That is, the inner diameter of the valve is 25 millimeters
Q:How big valves are used in a DN159 pipe?
DN159 is the valve with the DN150 in the outer diameter of the pipe.
Q:What does "1/2" mean on the valve?
Indicates that the ends of the valve are 1/2 inches in diameter. 1 inches is converted to metric system of 25.4 millimeters.
Q:What are the types of valves?
1.1 classification by purpose and functionx09 (1) cut-off valve is mainly used to cut off or switch through the media flow, including gate valve, globe valve, diaphragm valve, ball valve, plug valve, butterfly valve, plunger valve, ball plug valve, needle type instrument valve, etc.x09 (2) control valve is mainly used to regulate the flow of medium, pressure, etc., including regulating valve, throttle valve, pressure reducing valve and so onx09 (3) check valves are used to prevent backflow of media. Check valves with various structures are includedx09 (4) diverter valves are used for separation, distribution, or mixing of media, including distribution valves and traps for various structuresx09 (5) safety valves are used to protect the medium against overpressure. Various types of safety valves are included1.2 classify by main parameters
Q:What items and detailed procedures should be inspected for valve size inspection?
Valve body structure length and flange size, GB size, the implementation of GB/T12221-2005. American Standard. (the American Society of mechanical engineers ASME B 16.10-2000).
Q:What is the valve before and after the pump?
Conventional setting, the pump is installed before and after the cut-off valve. As for the check valve, according to the need to decide whether to install, to see whether the occasion required to prevent backwater function.
Q:Valve legend
This should be part of the thermodynamic device that represents the gate valve or butterfly valve

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