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Pressure reducing valve
Product Name:
Pressure reducing valve
Description:
YK42F減壓閥|氣體減壓閥
一、產品用途:
YK42F系列氣體減壓閥是彈簧薄膜式減壓的換代產品,與薄膜式相比有以下優點:
1、使用壽命長,不存在膜片損壞的問題。
2、耐高壓,出口壓力高時,薄膜片高不行了,而活塞可適應很高的出口壓力。
該閥用于工作溫度-10~150℃的天然氣和空氣,燃氣,非腐蝕性液體管路上,在高層建筑的冷熱供水和消防供水的系統中,可取代常規分區水管,這樣可以簡化的節省系統的設備,降低工程造價,也可在各類壓機設備的冷卻系統中起著減壓、穩壓作用,的確是用戶理想的產品。
 
二、工作原理:
1、 本閥通過啟閉件的節流,造成壓力損失迫使進口壓力在出口處降低某一個需要值,當流量和壓力變化時,利用本身介質能量來控制出口壓力基本不變的目的。
2、  本閥介質走向由上進下出,當調節出口壓力時,順時針旋轉調節螺栓迫使活塞向下移動,打開主閥,改變節流面積,造成壓力損失,實現減壓。由于閥后介質通過“X”通道流入活塞下腔并與活塞上方保持平衡,當壓力和流量變化時,使主閥節流面積始終保持相應位置,由于本閥采用卸荷機構,減小了進口壓力面積,從而減小了閥門出口壓力偏差,大大提高了減壓閥的穩壓精度。
 
三、性能規范:                                                                   單位:MPa

公稱壓力
PN
試驗壓力
PS
進口壓力
P1
出口壓力
P2
最小壓差
P
背壓
PB
壓力特性
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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