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Pressure reducing valve
Product Name:
Pressure reducing valve
Description:
YK42F减压阀|气体减压阀
一、产品用途:
YK42F系列气体减压阀是弹簧薄膜式减压的换代产品,与薄膜式相比有以下优点:
1、使用寿命长,不存在膜片损坏的问题。
2、耐高压,出口压力高时,薄膜片高不行了,而活塞可适应很高的出口压力。
该阀用于工作温度-10~150℃的天然气和空气,燃气,非腐蚀性液体管路上,在高层建筑的冷热供水和消防供水的系统中,可取代常规分区水管,这样可以简化的节省系统的设备,降低工程造价,也可在各类压机设备的冷却系统中起着减压、稳压作用,的确是用户理想的产品。
 
二、工作原理:
1、 本阀通过启闭件的节流,造成压力损失迫使进口压力在出口处降低某一个需要值,当流量和压力变化时,利用本身介质能量来控制出口压力基本不变的目的。
2、  本阀介质走向由上进下出,当调节出口压力时,顺时针旋转调节螺栓迫使活塞向下移动,打开主阀,改变节流面积,造成压力损失,实现减压。由于阀后介质通过“X”通道流入活塞下腔并与活塞上方保持平衡,当压力和流量变化时,使主阀节流面积始终保持相应位置,由于本阀采用卸荷机构,减小了进口压力面积,从而减小了阀门出口压力偏差,大大提高了减压阀的稳压精度。
 
三、性能规范:                                                                   单位:MPa

公称压力
PN
试验压力
PS
进口压力
P1
出口压力
P2
最小压差
P
背压
PB
压力特性
P2P1
流量特性
P2G2
1.6
2.4
1.6
0.1~1.0
0.2
0.15
P2×10%
P2×20%
2.5
3.75
2.5
0.3~1.6
0.2
0.25
P2×10%
P2×20%
4.0
6.0
4.0
0.3~2.5
0.2
0.25
P2×10%
P2×20%
6.4
9.6
6.4
0.5~3.0
0.25
0.4
P2×12%
P2×25%

四、主要外形尺寸

DN
L
H1
H2
PN16  PN25
PN40  PN64
PN16
PN25
PN40
PN64
PN16
PN25
PN40
PN64
20
160
160
170
90
90
90
90
220
220
220
220
25
180
200
200
95
95
105
105
255
255
265
365
32
200
220
220
100
100
110
110
255
255
265
365
40
220
240
240
115
115
130
130
325
325
330
330
50
250
270
270
120
120
135
135
325
325
330
330
65
260
280
300
125
126
145
145
330
330
340
355
80
310
330
330
135
135
160
160
340
340
340
340
100
350
380
380
185
185
185
185
360
360
360
360
125
400
450
450
190
200
200
245
560
560
565
565
150
450
500
500
205
210
240
280
580
580
585
585
200
500
560
560
220
245
245
310
630
630
635
635
250
600
 
 
270
 
 
 
750
 
 
 
300
800
 
 
310
 
 
 
780
 
 
 
350
850
 
 
390
 
 
 
850
 
 
 

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