Unique Design Measures Accurately in Short Straight-Run
度分布进行调整
流速分布变得十分规则
Pipe Reduction with Conditioning Orifice直管段减少
Disturbance
90°Elbow
Standard Orifice Upstream (1)(Downstream)
Conditioning
Plate Upstream (Downstream)
Pipe Reduction
44 (7)
(2) 90°Elbows in Plane
2 (2)86%
44 (7)
(2) 90°Elbows Out of Plane
2 (2)
86%
60 (7)
Gate Valve
2 (2)2 (2)
93%89%
18 (7)
(1)Recommended lengths presented in ISO 5167 (0.65β)
Emerson ConfidentialSlide 46
Slide 49
Centering Ring Improves Performance对中环保证对心
•保证同心度在1/32” (0.75mm)内•优于ANSI 标准
Orifice Alignment Sensitivity2" Line size, Corner Tap
7.00%6.00%5.00%
E r r o r
4.00%3.00%2.00%1.00%0.00%-1.00%
1/8" (3.18mm)
1/4" (6.35mm)
1/2" (12.7mm)
Deviation from Center
“The orifice must be concentricwith the inside of the meter tube or orifice fitting. …concentricity shall be maintained within 3 percentof the inside diameter …of the orifice meter tube.” –Section 4.2.4 ANSI/API 2530
Emerson ConfidentialSlide 51
Emerson Confidential
Slide 53
Emerson Confidential
Slide 54