EN558 Eccentric Double Flanged Butterfly Valve

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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

 

 

EN558 Eccentric Double Flanged  Butterfly Valve

EN558 Eccentric Double Flanged  Butterfly Valve

EN558 Eccentric Double Flanged  Butterfly Valve

 

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.

 

http://www.alibaba.com/product-detail/Huagreat-Flange-Lug-Wafer-Butterfly-Valve_941906027.html

 

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There is no water outlet and water leakage: when the faucet within the axis of the gasket wear will appear this situation. Solution: Select the corresponding pliers according to the size of the faucet to tap the faucet gland, and remove the wear of the shaft with a clip, and then replace the new pad to solve the problem.
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Another friend is talking about the pull switch (traditional switch), if not the kind of picture is similar to the two or third gear
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In the middle of the two studs with a few large nuts on the tightened
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Is there a bubble machine? If any, then go directly to the hardware store to buy on the line,
Q:Kitchen wash basin faucet handle how to repair the water leakage
This is the spool of the ceramic pieces of wear and tear caused by the leakage of the law of a single spare rods put the lice but stiff, if the tap no other quality no problem can choose to replace the spool can be. Spool Removal Step: Uncover the red and blue torsion below the handle and release the handle with the appropriate hex key to release the handle inside the hexagon screw (some of the product with a flat screw); then open the spool Cover and gland to replace the spool. When installing a new spool must pay attention to positioning is correct! Replacement of the new spool can go to the hardware store or bathroom shop to buy, it is recommended to use the old spool to contrast.
Q:What is the seal of the solar water tank with the water interface?
Can be called rubber seals.
Q:About the kitchen of the faucet, we buy what brand
Kitchen faucet selection rule 1: good water-saving kitchen faucet not only make the water out of the bubble, limiting the flow rate, and let the user feel the water is more gentle, abundant water. Kitchen faucet selection rule 2: durable faucet is durable, the surface treatment process is very important. Good faucet can withstand acidic high temperature test. In addition, the internal structure is reasonable, the spool is the heart of the leading, good spool is not easy to drip and damage phenomenon. Kitchen faucet selection rule 3: human, for example, pull the kitchen faucet, with columnar water and jet water in two ways, clean and convenient, more pullable stainless steel hose, easy to reach the place you need to expand the cleaning Range, so that cleaning can also be a fun thing. Kitchen faucet selection rule 4: easy to clean the kitchen fumes larger, many times after the cleaning surface is easy to lose luster, and may appear coating color, off the phenomenon. Therefore, when buying a faucet must understand its warranty period. Kitchen faucet selection rule 5: lead content in environmentally friendly water is mainly caused by water scouring the waterway. Material is not good lead, it is easy to lead lead and other heavy metal content exceeded, endanger the family, especially the child's healthy growth. Kitchen faucet rule 6: Convenient faucet design Taking into account the needs of a variety of cleaning methods, you can pull out and spray vegetables and other things, can clean the general cleaning utensils can not reach the corner.
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Before the renovation, you need to do a good job between the wash basin and the water heater.
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It's difficult to take the old one out because there is very limited space to work in. When you go to install the new one, use stainless flex lines instead of copper, & attach them to the faucet before you drop it in the cutout.
Q:How can you open the round (shape) head faucet filter and bubbler?
There is a hand-made flat pliers that hold the groove and rotate it open.

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