Butterfly Valve Marine Stainless Steel High Quality

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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.

2.Main Features of the Manual Wafer Butterfly Valve 

 Butterfly valveis exclusive pneumatic elements controlling the actions of the brake and cluth of a press. It ensure that cluth and brake maintain a certain procedure of gear-in and release, i.e. when press starts the brake shall first release for 0.03 sec before clutch gear-in; and when the press stops, the clutch shall first release for 0.01 sec before brake active. 

Quick DetailsStandard or Nonstandard:  Standard Structure:  Gate Pressure:  Medium Pressure

Power:  Manual Material:  Casting Temperature of Media:  Medium Temperature

Model Number:  CMAX-GF4 resilient gate valves:  resilient seat flange

Packaging & DeliveryPackaging Detail: air plastic bag inside/wooden box outside

Delivery Detail: 15-60days

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


Butterfly Valve  Marine Stainless Steel High Quality

Butterfly Valve  Marine Stainless Steel High Quality

4.Manual Wafer Butterfly Valve  Specification

1) Sizes: DN40mm-DN1400mm2) Materials:
Body: CI(cast iron ,GG25 )/ DI (ductile iron ,GGG40)


 1. 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.

2. 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.

3. 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.




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Q:DN80 flange butterfly valve, DN80 flange butterfly valve DN80, flange butterfly valve DN80 what is the difference?
Of course there are differences, the general market sales of the DN80 are many flange plate copper rod butterfly valve, quality can not reach the national standard, to use copper rod copper butterfly valve quality is king.
Q:What is a Valve Adjustment?
Some cars have little hydraulic gizmos to keep the valves more or less where they're supposed to be. Doing without them is, according to some, a tad more precise, but you have to have the valves checked now and then. (On my old Celica, it was a 60k maintenance item.) It will probably run a hair better afterwards.
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:Butterfly valve network and ordinary butterfly what is the difference?
Butterfly valve used in the network structure, closed with the more closed, the more tight function, reliable sealing performance, after opening and closing, make sure that the cover is completely out of touch, to ensure that the sealing surface is not damaged. The sealing surface is made of stainless steel, corrosion resistant, high temperature resistant, long service life. With two-way sealing function, medium flow is not affected by the installation restrictions (if only one-way control medium should be used to seal the installation direction) is not affected by the spatial units, can be installed in any direction.
Q:Classification of telescopic butterfly valve
(1) Central sealed butterfly valve(2) single eccentric sealed coal valve;(3) double eccentric sealed butterfly valve(4) three eccentric sealed butterfly valve (1) soft sealing butterfly valve.1) the sealing pairs are made of non-metallic soft materials, which are made of non-metallic soft materials.2) the sealing pair is made of metal hard material and is made of non-metallic soft material.(2) metal hard sealing butterfly valve. The sealing pair is made of metal hard material and is made of metal hard material. (1) forced sealing butterfly valve;1) elastic sealing butterfly valve. The pressure of the valve seat, seat, or plate is produced when the seal is closed by the pressure from the valve
Q:How big is the butterfly valve with a diameter of 80?
Generally speaking, especially small caliber, the butterfly valve will not use the variable diameter. Therefore, the butterfly valve DN and pound class selection, according to the field pipeline flange DN and pound level.So, in a strict sense, the caliber of the butterfly valve and the diameter of the pipe have not much relationship.Specific to your pipe diameter, there are questions: 80 diameter refers to the outer diameter or inside diameter? Yes, there is no flange on the site. Do you need a pair of flanges to be supplied?
Q:The difference between butterfly valve and gate valve
Its varieties and quantities are still expanding, and the development of high temperature, high pressure, large caliber, high sealing, long life, excellent regulation, as well as multi-function development of one valve. Its reliability and other performance indicators have reached a high level. Disadvantages, there is a certain resistance to the medium. Gate valves are more used in steam pipes and large diameter water supply pipelines, because of the general requirements of fluid resistance is small, the use of gate valve. Valve is hand wheel rotation, stem upward movement. Flow is not the same, the gate valve requires full open. Need a higher installation space, the valve sealing surface has a certain self sealing capacity, its spool by the media pressure closely with the valve seat sealing surface contact, to achieve tight leakage.
Q:Is the pressure test of the centerline butterfly valve checked or checked?
The pressure test of the central butterfly valve is carried out at each station.Basis:1) GB/T12238-2008 flange and clamp connection elastic seal butterfly valveRules: butterfly valve must be carried out by factory inspection and testing, inspection qualified before leaving the factory.2) CJ/T 261-2007, butterfly valves for water supply and drainageRules: each product shall be inspected by factory and quality inspection department. After inspection, the product certificate shall be attached to the factory.Butterfly: also known as butterfly valve, control valve has a simple structure, can be used for low pressure pipeline valve switching control is closed parts (disc or disc) is a disk, around the valve axis to achieve the opening and closing a valve, the valve can be used to control air, water, steam, all kinds of corrosive media, mud, oil, metals and radioactive liquid media and other types of fluid flow. On the pipeline, mainly from cutting and throttling. Butterfly valve headstock is a disc shaped disc, in the valve body around its own axis of rotation, so as to achieve the purpose of opening or closing or regulation.
Q:Butterfly valves are widely used in 2.0MPa below the pressure and temperature of not more than 200 degrees of various media, right?
3. kinds of butterfly valve:According to the connection mode: flange type, clip type.According to the material of sealing surface, soft seal and hard sealing.According to the structural form, butterfly valves can be divided into the following types:Plate typeInclined plate typeOffset plateLever type4. butterfly valve features:(1) the structure is simple and the shape is small. The utility model has the advantages of compact structure, short structural length, small size and light weight, and is suitable for large caliber valves.(2) the resistance of the fluid is small, and when the valve is fully opened, the valve seat passage has an effective circulation area, so the fluid resistance is smaller.(3) open and close, convenient and quick, good adjustment performance, butterfly plate rotation 90 degrees can be completed headstock. By changing the angle of rotation of the disc, the flow can be graded.(4) the opening and closing moment is smaller, because the butterfly plate on both sides of the rotating shaft is basically equal to the medium, and the opposite direction of the torque is generated, so that the opening and closing is more labor-saving.(5) low pressure sealing performance, sealing surface materials generally use rubber, plastic, sealing performance is good. Limited by the material of the sealing ring, the pressure and the temperature range of the butterfly valve are smaller. But the use of hard sealing butterfly valve pressure and temperature range has been greatly improved.
Q:mitral valve prolapse?
it can cause atypical chest pain but rarely leads to serious problems

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