结构材料
Materials of Construction
阀体：304或316不锈钢，带整体金属阀座
闸板：304或316不锈钢
填料密封装置：316不锈钢
填料密封装置五金件：碳钢
螺栓/五金件：碳钢
轭架轴套：铝青铜
阀杆和夹子：304不锈钢
手轮和上部结构：碳钢
执行器：低碳钢或铸铁结构
附件支架/紧固件：碳钢
Body: 304 or 316 Stainless Steel with integral
metal seat
Gate: 304 or 316 Stainless Steel
Packing Gland: 316 Stainless Steel
Packing Gland Hardware: Carbon Steel
Bolting/Hardware: Carbon Steel
Yoke Sleeve: Aluminum Bronze
Stem and Clip: 304 Stainless Steel
Handwheel and Superstructure: Carbon Steel
Actuators: Mild Steel or Cast Iron construction
Accessory Brackets/Fasteners: Carbon Steel
阀门选型，流量Cv/Kv值
Valve Selection Cv/Kv Values
阀门通径
Valve Size
(mm/in) |
金属阀座
Metal Seated |
Cv*
Kv* |
开启面积
Area of Opening
(cm2/in2) |
DN50
2" |
232
199 |
19.6
3.04 |
DN80
3" |
505
433 |
40.7
6.31 |
DN100
4" |
890
763 |
69.4
10.76 |
DN150
6" |
2050
1757 |
156.1
24.20 |
DN200
8" |
3695
3166 |
268.8
41.66 |
DN250
10" |
5935
5086 |
422.8
65.53 |
DN300
12" |
8545
7322 |
598.3
92.73 |
DN350
14" |
10505
9002 |
721.0
111.76 |
DN400
16" |
14030
12022 |
954.4
147.93 |
DN450
18" |
17900
15339 |
1225.5
189.94 |
DN600
24" |
33280
28518 |
2222.9
344.55 |
| * |
Cv = 在压降1 psi下的流量，单位为美制加仑/分钟
Cv
= Flow in GPM of water at 1 psi pressure drop.
Kv = 在压降100 kPa下的流量，单位为立方米/小时
Kv = Flow in m3/hr. of water
at 100 kPa pressure drop. |
| ** |
根据下列公式可以用来计算的管道有效长度：
The equivalent length of pipe may be calculated
according to the following formula: |
|
| |
|
|
|
在此
Where |
L = 管道有效长度，单位为英尺
L = Equivalent length
of pipe in feet
K = 系数 - 阀门的阻流系数
K = factor - Resistance
coefficient of valve
D = 管道直径，单位为英尺
D = Pipe diameter in feet
f = 摩擦系数，与管道类型有关
f = Friction factor, relating to type of pipe |
|
