Company Info
GZY was founded by a group of many years experienced specialists with products developing, designing, producing management and quality control.
Our mills are certified by ISO 9001:2000 and PED 97/23/EC,we are supplying only good quality, traceable inspection and reliable delivery.
We are aleading manufacturer of specialized Pipe Fittings, Flanges, Valves meeting National / International Standards such as ASTM / ASME, JIS, IBR and NACE, from Carbon Steel, Alloy Steel and Stainless Steel ... view more
Company Profile
OEM Services Provided:
NO
Business Type:
Manufacturer, Trading Company
Quality Certificate:
GS, ISO9001, ISO9001:2000, VDE, SSA
Main Export Markets:
North America, Western Europe, Eastern Europe, South America, Southeast Asia, Eastern Asia, Mid East, Oceania, Africa
A butterfly valve is a rotary motion valve. The main purpose of butterfly valve is used to stop, regulate, and start fluid flow. This type of valve is easily and quickly operated because there is a 90 degree rotation of the handle which moves the disk from a fully closed to fully opened position. Butterfly valves are available in various sizes and materials. Infact, the larger sized butterfly valves are actuated by hand wheels which are connected to the stem through gears and they provide mechanical advantage at the expense of speed.
Parts of a butterfly valve:
The butterfly valve consists of only five main components. They are as follows:
Body: These valves have bodies that fit between two pipe flanges.
Disc: The disk is the flow closure member of a butterfly valve.
Stem: The stem of the butterfly valve is either a one-piece shaft or a two-piece, also known as split-stem design.
Seat: The seat of a butterfly valve utilizes an interference fit between the disk edge and the seat to close or to shutoff.
SOperator
Following the complete list:
+ D71X wafer soft seat butterfly valve
+ Flanged type three offset Butterfly valve
+ Lug type double offset Butterfly Valve
+ Tripe Eccentric Butterfly Valve
+ Sleeve Type Soft Sealing Plug Valve Acc.To ANSI
Uses of Butterfly valves:
Butterfly valves are considered to be the most economical and reliable type of pipe valves. Technological innovations combined with the simple design of the butterfly valve has made it a dependable, economical and flexible solution to a variety of industrial flow control needs. These valves have many advantages over other valves like gate, globe, plug, and ball valves, especially in large valve applications. The most obvious advantages are savings in weight, space, and cost. The maintenance cost is low because there are a less number of moving parts and there are no pockets to trap fluids. They are widely used in water distribution and waste water processing.
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The main purpose of butterfly valve is used to stop, regulate, and start fluid flow. This type of valve is easily and quickly operated because there is a 90 degree rotation of the handle which moves the disk from a fully closed to fully opened position. Butterfly valves are available in various sizes and materials. Infact, the larger sized butterfly valves are actuated by hand wheels which are connected to the stem through gears and they provide mechanical advantage at the expense of speed. 
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