三阀组的安装、拆卸及使用方法
Three Valves mounting, disassembly and method of application
安装Mounting
①差压表
⑤母    ⑥索婚    
③负压阀门    ②三阀组    
①Differential pressure gauge②3-way manifolds
③negative pressure valve④positive pressure valve
、
中间阀门    ⑤middle valve    
⑥nuts
正压阀门
P    P+    

1.正常使用差压表必须配三阀组或五阀组以保护差压表正常工作。
2.差压表和三阀组用两个索母紧固。索母和差压表接头密封面应加四氟垫片。
3.装有三阀组的差压表在使用前必须把中间阀门打开，并把正压阀门和负压阀门打开。当P+和P-任意的压力先进入时，中间阀门能起到平衡差压表两腔体内的压力的作用，以免打坏差压表。
4、当P+、P-的压力正常进入三阀组后，再关闭中间阀门使差压表正常工作。如差压表表针有轻微离零属正常只需把表针调到零位即可。注意必须用肥皂水检验所有密封口是否泄露，如有泄露必须紧固。
5.差压表有后背板式安装(如图)和立管固定方法。(管卡子卡到管子上)
1. Use differential gauge must fit out three valves in order to insure its normal working.
2.The differential gauge and there valves are connected by two nuts tightly, nuts and socket are withPTFEspacer.
3.Open the middle valve, negative pressure valve and positive pressure valve before use the differential gauge, when either of P- or P+ input, the middle valve can have equilibrium activity, and avoid to damage the gauge.
4.When P- and P+ normal input the three valves, then close the middle valve, to make the gauge works right. If the gauge's pointer is not at zero, please adjust it to zero (note must use soap water to inspect the seal, if has leak, please tight.)
5. The differential pressure gauge has back plate mounting (see the chart) and standpipe fixed (the pipe with clamp).

如何选型 HOW TO ORDER
型号代码    特性说明    
CODE    CHARACTERISTICS    
YCS普通型双针双管式差压表(Standard type) Double bourdon tubes
differential pressure gauge
YCSF    防腐型双针双管式差压表    
(orrosion-proof type) Double bourdon tubes differential pressure gauge
100    中100mm、中160mm    
AO    径向直接安装Bottom mounting    
AT    径向前边安装Bottom mounting with front flange    
AH    径向后边安装Bottom mounting with back flange    
504    不锈钢外壳/双波登管式    
Stainless steel case / double bourdon tubes
M040    0.16MPa 请参看量程代码表See range table    
M20    M20X1.5    
TO0    其它特殊要求的螺纹Other requests    
SBD    安装全双层玻璃Laminated safety glass    SY1    配长尾联接(螺纹)    
TPB    特殊要求的表盘 Special dial    Capillary connection (thread)    
TYO    用于氧环境Used in oxygen environment    H系列+SY1一化学密封隔膜配长尾联接    
FWP    不锈钢位号牌Stainless steel tag    H series chemical seals + capillary    
SNR    蒙乃尔膜片Monel diaphragm    
SSF    四氟膜片 PTFE diaphragm    
STI    片Ti diaphragm    
SDA    钽膜片 Tantalum diaphragm    
基本型号
外径
设计代码
量程
安装方式
备选项
连接螺纹
Diameter
Ranges 
 Design
Connection 
 Mounting
Basic type
Options