YK43F/X大口径气体减压阀属于先导活塞式减压阀。由主阀和导阀两部分组成。主阀主要由阀座、主阀盘、活塞、弹簧等零件组成。导阀主要由阀座、阀瓣、膜片、弹簧、调节弹簧等零件组成。通过调节调节弹簧压力设定出口压力、利用膜片传感出口压力变化，通过导阀启闭驱动活塞调节主阀节流部位过流面积的大小，实现减压稳压功能。本产品主要用于气体管路，如空气、氮气、氧气、氢气、液化气、天然气等气体。
一、主要技术参数和性能指标
|
公称压力(Mpa) |
1.6 |
2.5 |
4.0 |
6.4 |
10.0 |
16.0 |
|
壳体试验压力(Mpa)* |
2.4 |
3.75 |
6.0 |
9.6 |
15.0 |
24 |
|
密封试验压力(Mpa) |
1.6 |
2.5 |
4.0 |
6.4 |
10.0 |
16.0 |
|
*高进口压力(Mpa) |
1.6 |
2.5 |
4.0 |
6.4 |
10.0 |
16.0 |
|
出口压力范围(Mpa) |
0.1-1.0 |
0.1-1.6 |
0.1-2.5 |
0.5-3.5 |
0.5-3.5 |
0.5-4.5 |
|
压力特性偏差(Mpa)△P2P |
GB12246-1989 |
|||||
|
流量特性偏差(Mpa)P2G |
GB12246-1989 |
|||||
|
*小压差(Mpa) |
0.15 |
0.15 |
0.2 |
0.4 |
0.8 |
1.0 |
|
渗漏量 |
X/F(聚四氟乙稀/橡胶)：O Y(硬密封)：GB12245-1989 |
|||||
*：壳体试验不包括膜片、顶盖
二、流量系数(Cv)
|
DN |
15 |
20 |
25 |
32 |
40 |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
350 |
400 |
500 |
|
Cv |
1 |
2.5 |
4 |
6.5 |
9 |
16 |
25 |
36 |
64 |
100 |
140 |
250 |
400 |
570 |
780 |
1020 |
1500 |
三、主要零件材料
|
零件名称 |
零件材料 |
|
阀体 阀盖 底盖 |
WCB/FCB* |
|
阀座 阀盘 |
2Cr13/304* |
|
缸套 |
2Cr13/25(镀硬铬)/304* |
|
活塞 |
2Cr13/铜合金/铜合金* |
|
活塞环 |
合金铸铁/对位聚苯* |
|
导阀座 导阀杆 |
2Cr13/304* |
|
膜片 |
1Cr18Ni9Ti |
|
主阀 导阀弹簧 |
50CrVA |
|
调节弹簧 |
60Si2Mn |
|
密封垫(X/F型号) |
橡胶/聚四氟乙稀 |
|
导阀体 导阀盖 |
25/304* |
*：用于氧气介质时的材料
YK43F/F-16-DN15,YK43F/F-25-DN15,YK43F/F-40-DN15,YK43F/F-64-DN15,YK43F/F-100-DN15,YK43F/F-160-DN15,
YK43F/F-16-DN20,YK43F/F-25-DN20,YK43F/F-40-DN20,YK43F/F-64-DN20,YK43F/F-100-DN20,YK43F/F-160-DN20,
YK43F/F-16-DN25,YK43F/F-25-DN25,CCLAIR,YK43F/F-40-DN25,YK43F/F-64-DN25,YK43F/F-100-DN25,YK43F/F-160-DN25,
YK43F/F-16-DN32,YK43F/F-25-DN32,YK43F/F-40-DN32,YK43F/F-64-DN32,YK43F/F-100-DN32,YK43F/F-160-DN32,
YK43F/F-16-DN40,YK43F/F-25-DN40,YK43F/F-40-DN40,YK43F/F-64-DN40,YK43F/F-100-DN40,YK43F/F-160-DN40,
YK43F/F-16-DN50,YK43F/F-25-DN50,YK43F/F-40-DN50,YK43F/F-64-DN50,YK43F/F-100-DN50,YK43F/F-160-DN50,
YK43F/F-16-DN65,YK43F/F-25-DN65,YK43F/F-40-DN65,YK43F/F-64-DN65,YK43F/F-100-DN65,YK43F/F-160-DN65,
YK43F/F-16-DN80,YK43F/F-25-DN80,YK43F/F-40-DN80,YK43F/F-64-DN80,YK43F/F-100-DN80,YK43F/F-160-DN80,
YK43F/F-16-DN100,YK43F/F-25-DN100,YK43F/F-40-DN100,YK43F/F-64-DN100,YK43F/F-100-DN100,YK43F/F-160-DN100,
YK43F/F-16-DN125,YK43F/F-25-DN125,YK43F/F-40-DN125,YK43F/F-64-DN125,YK43F/F-100-DN125,YK43F/F-160-DN125,
YK43F/F-16-DN150,YK43F/F-25-DN150,YK43F/F-40-DN150,YK43F/F-64-DN150,YK43F/F-100-DN150,YK43F/F-160-DN150,
YK43F/F-16-DN200,YK43F/F-25-DN200,YK43F/F-40-DN200,YK43F/F-64-DN200,YK43F/F-100-DN200,YK43F/F-160-DN200,
YK43F/F-16-DN250,YK43F/F-25-DN250,YK43F/F-40-DN250,YK43F/F-64-DN250,YK43F/F-100-DN250,YK43F/F-160-DN250,
YK43F/F-16-DN300,YK43F/F-25-DN300,YK43F/F-40-DN300,YK43F/F-64-DN300,YK43F/F-100-DN300,YK43F/F-160-DN300,
YK43F/F-16-DN350,YK43F/F-25-DN350,YK43F/F-40-DN350,YK43F/F-64-DN350,YK43F/F-100-DN350,YK43F/F-160-DN350,
YK43F/F-16-DN400,YK43F/F-25-DN400,CCLAIR,YK43F/F-40-DN400,YK43F/F-64-DN400,YK43F/F-100-DN400,YK43F/F-160-DN400,
YK43F/F-16-DN500,YK43F/F-25-DN500,YK43F/F-40-DN500,YK43F/F-64-DN500,YK43F/F-100-DN500,YK43F/F-160-DN500,
