Butterfly Valve Soft Sealing High Quality

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1.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 Butterfly Valve 

(1) 90° movement for full open/close position. 

(2) Excellent control characteristics.Tight shut-off even after innumerable operations.

(3) Installation cost considerably reduced because of very low weight and compact design.

(4) Longer life and reliable service with minimum component wear.

(5) Renewable seats. No supplementary gasket required with the adjacent pipework.

(6) Body & Stem totally protected from service fluid.

3. Butterfly Valve Images

 

Butterfly Valve Soft Sealing High Quality

Butterfly Valve Soft Sealing High Quality

Butterfly Valve Soft Sealing High Quality

4.Butterfly Valve  Specification:

BODY

DISC

STEM

SEAT

BUSHING

MATERIAL

WORKING PRESSURE

CAST IRON

DUCTILE IRON WITH NICKEL PLATED

CARBON

STEEL

NR

-20-+85

LUBRIZED

BRONZE

DUCTILE

IRON

ALUMINUM BRONZE

STAINLESS
STEEL

HYPALON

-18-+135

INSTANTANEOUS

-18-+149

PTFE

ALUMINUM
BRONZE

STAINLESS STEEL

EPDM

-45-+135

INSTANTANEOUS

-50-+150

CARBON

STEEL

CARBON
STEEL

NEOPRENE

-7-+193

INSTANTANEOUS

-7-+107

STAINLESS STEEL

NBR

-12-+82

INSTANTANEOUS

-12-+93

WEAR-RESISTANT RUBBER

-10-+50

VITON

-23-+150

HEAT-RESISTANT RUBBER

-20-+150

PTFE

+10-+150

5.FAQ

1. What is manual wafer butterfly valve?

 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?

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 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 principle of butterfly valve and check valve? Any difference?
Direct water butterfly valve, check valve is to water can not flow valve
Q:DN80 flange butterfly valve, DN80 flange butterfly valve DN80, flange butterfly valve DN80 what is the difference?
No, what's the difference?. It's not all the same.Flange connectionDN80 caliber butterfly valve. What's the difference?. Model and pressure. Materials are not ~!
Q:What's the difference between the three eccentric butterfly valve and the two eccentric butterfly valve?
Single eccentric butterfly valve: extrusion problems, address concentric butterfly valve and valve seat of the resulting in a single eccentric butterfly valve, the structural characteristics of the stem axis deviated from the disc center, so that the butterfly is no longer a rotary bottom plate, axial dispersion, reduce the excessive squeezing and the lower end of the seat of the butterfly board. Double eccentric butterfly valve: in the single eccentric butterfly valve on the basis of further improvement of forming, is the most widely used double eccentric butterfly valve.
Q:What is the effect of nylon coating on butterfly valve plate? Thank you
Mainly media will not be contaminated by rust on the body, you should say that the central soft sealing butterfly valve, the central valve is generally cast steel or cast iron material, so useNylon coatingLining up. There are soft seals, sealing performance is relatively high
Q:What is the electric butterfly valve? Please, great God!
ZSDF type fire signal butterfly valve uses: top of the ZSDF type fire signal butterfly valve with the valve opening and closing signal device, when the valve is closed by 25% (open degree 4/1), the signal device output signal was mistakenly closed to the fire control center.
Q:Can the inlet and outlet of butterfly valve be reversed? Why? What will happen if the reverse gear is installed?
Our factory butterfly valve has two-way sealing, can be installed, and will not leak. If there is an arrow above the butterfly valve is one-way seal, that is, can not be installed. One way sealing will cause leakage. If you have any other questions, you can bring them up. Let me help you with that
Q:What kind of butterfly valve is sd342x?
Sd342x: two-way double eccentric soft sealing butterfly valveS: two way pressureD: butterfly valve3: turbine operation4: flange connection2: double eccentricX: rubber sealProbably the shape is not so good in appearance,Double eccentric mostly elastic sealThree eccentric is multi-layer sealHope to be of help to youOpened valve Co., Ltd. on the production of butterfly valve
Q:What is the D37-10Q butterfly valve?
It may be the D371, the turbine to the clip type soft sealing butterfly valve, from your model can also see that the pressure is 1.0MPa, the body is ductile iron. It could be the D373, the turbo clamp hard seal butterfly valve, which is more expensive than the soft seal.
Q:What are the major disadvantages of butterfly valves?
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 the flow of air, water, steam steam, all kinds of corrosive medium, mud, oil, metals and radioactive liquid media and other types of fluid. 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.shortcoming1, use pressure and working temperature range is small.2, poor sealing.Butterfly valve can be divided into bias plate, vertical plate, inclined plate and lever by structure. According to the form of sealing, can be soft sealed and hard sealed type of two. The soft sealing type usually adopts rubber ring seal, and the hard sealing type usually adopts metal ring seal.According to the connection type can be divided into flange connection and clamp type connection; according to the transmission mode can be divided into manual, gear drive, pneumatic, hydraulic and electric several.
Q:What do you mean, handle, butterfly valve, hard back and soft back?
Hello, soft sealing butterfly valve is generally divided into skeleton, seat and frameless valve seat, the skeleton of the general material: resin, aluminum, iron.. Etc.. With back seat is on the back of the vulcanized rubber, without skeleton, valve seat is rubber.

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