Pneumatic Double Flange Butterfly Valve,Ductile Iron Wafer Butterfly Valve

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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


Pneumatic Double Flange Butterfly Valve,Ductile Iron Wafer Butterfly Valve

Pneumatic Double Flange Butterfly Valve,Ductile Iron Wafer Butterfly Valve

4.Manual Wafer Butterfly Valve  Specification


Pneumatic Double Flange Butterfly Valve,Ductile Iron Wafer Butterfly Valve

Pneumatic Double Flange Butterfly Valve,Ductile Iron Wafer Butterfly Valve




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 does "1/2" mean on the valve?
1/2 is 4 points (20), 3/4 is 6 points (25), and 1 is 1 inches (32)
Q:Representation of several types of valves
Valve type:Z gate valveJ stop valveL throttling valveQ ball valveD butterfly valveH check valve and bottom valveG diaphragm valveA safety valveT regulating valveX plug valveY pressure reducing valveS trapDZ solenoid valveO electromagnetic motionDrive mode:1. electromagnetic and hydraulic action2., electricity, a liquid3. worm gear4. the spur gear rotates5. bevel gear rotation6. pneumatic7. fluid movement8. air and one liquid movement9. electricOther hand wheel, handle, board hand, no performanceSide mode;1. internal thread2. external thread3. flanges (for double spring relief valves)4. flanges5. flanges (for lever type, safety door, single spring safety door)6. welding7. pairs of clips8. clamps9. card sleeveIllustrated cover or lining:T copper alloyH alloy steelB tin based shaft (bearing alloy)Y cemented carbideX rubberJ hard rubberSA PTFESB poly three fluoro ethyleneSC polyvinyl fluorideSD phenolic plasticsSN nylon
Q:What is the choice of pneumatic valve or electric valve for ultrafiltration inlet control valve?
Pneumatic valve compared to the electric valve, the valve can be the same, rubber lined butterfly valve or other valves, pneumatic valve opening speed (Basic 1 second can be fully open), the price is lower than the electric valve. But there must be process air (4-6bar compressed air). According to my experience, if the scene has compressed air, it is recommended to use pneumatic valve, if there is no compressed air, it is recommended to use electric (electric valve expensive, open valve slow).
Q:Mechanical valve
From the appearance of it is not too good to say, if it is the valve, only one-way valve.The valve usually consists of the stem, spool, seat, body, seal, and so on. This figure feels more like a filter that connects a pressure vessel to an inlet or an inlet.I've seen a lot of filters like this, usually open with -drain filter inside. Play a role in the filter of some large magazines, you can change, more metal, the mother is relatively small (relatively large hole)
Q:What valve is the YQZ45X-16Q?
Specifically, YQ usually is the enterprise code, Z valve, 4 representative flange, 5 representatives of the dark bar, X (soft) rubber seal (gate coated with rubber material), nominal pressure 16 representative (PN) 1.6Mpa, Q on behalf of the valve body is made of ductile cast iron. If you add the valve bore (DN), it will be more detailed.
Q:Is there a one-piece, two linkage valve?
Yes, three ball valves (T and L) are two. Switch more complex point of the valve is basically ball valve, such as central air-conditioning commonly used to the four - way reversing valve.
Q:What are the production equipment in valve shop?
Gold processing equipment, such as cars, milling, drilling, grinding, slotting machines with little,Special equipment, welding machine, test press, grinding machine, painting line, shot blasting machineAuxiliary equipment, air compressor, grinder,
Q:What's the meaning of the "single valve"?
Make is commonly known as "living joint". The utility model is a common pipe connecting piece which can be conveniently installed and disassembled.
Q:Hydrant valve leaks, how do you close other valves? Specific steps?
Crown valve pressFirst, make sure the front of the fire hydrant has a gate valve or butterfly valve Yes, it will be closed and replaced by the lineNo, then useSecond, the pressure of the pipeline to see how big, and if it is rare, replace it with water
Q:What does the "Z45T-16" valve mean?
Z - gate valve4 - flange connection5 - Dark pole, stem non lifting (gate valve structure)T - copper alloy, valve sealing face code16 - pressure code, 1.6MPaMaterial code for grey cast iron valves of nominal pressure less than or equal to PN16 shall be omitted in model preparation.May refer to JB/T 308 valve model compilation method

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