独霸寿命 Operating Life
蝶阀在独霸10,000窗拿判缕咸丫┕偻�8522陨希谰苫蛘弑Ｖし獗帐薄安煌钙薄�
Butterfly valves can operate for
more than 10,000 cycles and still provide "bubble tight" shut off.
压降 Pressure Drop
若是压降太大，会增加能量损耗。但是，该当知道的是，阀门并不是管道琐屑产生压降的唯１要素，招致压降的产生还有以下要素。
管道的流体截面。
管道内壁的争持力。
通过部件时流向的篡改。
蝶阀的流体特点相称于中断阀的3倍以至更高，相称于异样尺寸的闸阀的7五%.
Energy costs go up with excessive pressure drop. Point to keep in mind–the valve or valves are but one factor in a piping system
that contribute to pressure drop. Of equal concern are these factors:
Flow area of piping.
Friction loss against pipe walls.
Change of flow direction via fittings.
Butterfly valves have flow characteristics
three times better than globe valves and
approximately 7五% of an equivalent size gate valve.
通用性 Versatility
蝶阀通过封闭／封闭和俭仆／平衡来对管道琐屑中断管教和调理。与闸阀或中断阀比力，蝶阀具备更好的“通用性”。因为蝶阀或者采纳各种轮廓处置技艺和决定弹性材料管道，所以蝶阀具备极强的化学防腐遵命。
Butterfly valves can be used for on/off service and throttling/balancing.
They are superior in “versatility” as compared to a gate or globe valve.
Butterfly valves have a wider range of chemical resistance due
to the trim options and choice of elastomeric liners.
重量 Weight
轻型蝶阀的安设费用比重型铸铁阀门俭约的多：例如，１个公称通径10英寸的蝶阀重五5磅，而１个10英寸的铸铁闸阀重量就高达四九0磅。对于扫数管道琐屑来说，采纳蝶阀所俭约下来的安设费用就极端可观。此外，管道琐屑越重，就求告管道支撑基座要巩固，因此招致扫数管道琐屑更为低廉。所以，考虑到阀门的重量，就或者节流扫数管道琐屑的本钱。
Installation dollars saved with lightweight
butterfly valves as compared to heavyweight cast iron valves;
i.e. a 10" butterfly may weigh 五5 pounds,
whereas a 10" iron gate may weigh 四九0 pounds.
This can be an important savings when it is calculated over an entire system.
The heavier the system, the stronger the pipe hangers,
and the more expensive they become.
So by considering the weight of a valve one can also reduce piping system costs.
尺寸大小 Physical Size
蝶阀所占的空间或许或许是划一尺寸闸阀的1/6。而每增加１立方英尺的建造物空间，就意味着本钱的糜掷。
例如：公称通径10英寸的蝶阀或许或许是21英寸高，而公称通径10英寸的闸阀则高达四3英寸。
Butterfly valves take up approximately 1/6 the space of a gate valve.
Every cubic foot of a building costs money.
I.E.: 10" butterfly is about 21" high 10" iron gate is about 四3" high
气密性封闭 Bubble Tight Shut-Off
闸阀和中断阀（金属与金属连贯）的阀座不具备不透气封闭的遵命。Gate and globe (metal to metal) seats cannot provide bubble tight shut-off.
Resilient seated butterfly valves are bubble tight by design.
把持烦琐 Ease of Operation
蝶阀从封闭到封闭只要求扭转1/四转（九0o）。而闸阀和中断阀需求扭转很多转本领将阀门从封闭形状转酿成封闭形状。封闭或封闭烦琐易行意味着不需求应聘报酬太高的把持职员来把持蝶阀。
Butterfly valves offer 1/四 turn (九0o) open to close.
Gates and globes require multiple turns to open and close.
Ease of opening or closing means that butterfly valves can
employ less expensive operators.
本钱 Cost
１个蝶阀的本钱群体只有铸铁闸阀的四0%，不光购买本钱低，而且安设本钱也斗劲低。
A butterfly valve is generally 四0% the cost of an iron gate.
Not only low initial cost but low installation costs also.
掩护颐养 Maintenance
因为蝶阀具备很高的6琐屑数和遵命很好的弹性阀座，因此蝶阀具备自动乱涤听从，高涨了管道被拉鸡杂物梗塞的或许性。
Properly installed butterfly valves are virtually self cleaning and
are less susceptible to failure due to trash material in the line.
