Edwards nXDS15iC Vacuum Scroll Pump Pressure Testing

2013 ◽  
Author(s):  
H. Sessions ◽  
G. A. Morgan
Keyword(s):  
Pressure Testing ◽  
Pump Pressure

Residential tornado safe room from commodity wood products – impact and wind pressure testing

2018 ◽  
Author(s):  
Robert H. Falk ◽  
James J. Bridwell ◽  
C. Adam Senalik ◽  
Marshall Begel
Keyword(s):  
Wood Products ◽  
Wind Pressure ◽  
Pressure Testing

Effect of semi-open impeller side clearance on centrifugal pump cavitation inception

2018 ◽  
Vol 1 (2) ◽  
pp. 24-39
Author(s):  
A. Farid ◽  
A. Abou El-Azm Aly ◽  
H. Abdallah
Keyword(s):  
Centrifugal Pump ◽  
Static Pressure ◽  
Rotation Speed ◽  
Centrifugal Pumps ◽  
Severe Condition ◽  
Cavitation Inception ◽  
Total Input ◽  
Input Pressure ◽  
Pump Head ◽  
Pump Pressure

Cavitation in pumps is the most severe condition that centrifugal pumps can work in and is leading to a loss in their performance.  Herein, the effect of semi-open centrifugal pump side clearance on the inception of pump cavitation has been investigated.  The input pump pressure has been changed from 80 to 16 kPa and the pump side clearance has been changed from 1 mm to 3 mm at a rotation speed of 1500 rpm. It has been shown that as the total input pressure decreased; the static pressure inside the impeller is reduced while the total pressure in streamwise direction has been reduced, also the pump head is constant with the reduction of the total input pressure until the cavitation is reached. Head is reduced due to cavitation inception; the head is reduced in the case of a closed impeller with a percent of 1.5% while it is reduced with a percent of 0.5% for pump side clearance of 1mm, both are at a pressure of 20 kPa.   Results also showed that the cavitation inception in the pump had been affected and delayed with the increase of the pump side clearance; the cavitation has been noticed to occur at approximate pressures of 20 kPa for side clearance of 1mm, 18 kPa for side clearances of 2mm and 16 kPa for 3mm.

To the theory analysis of tightness of tank of pressure testing

2019 ◽  
Vol 5 (4) ◽  
pp. 129-142
Author(s):  
Vladislav Sh. Shagapov ◽  
Ismagilyan G. Khusainov ◽  
Emiliya V. Galiakbarova ◽  
Zulfya R. Khakimova
Keyword(s):  
Relaxation Time ◽  
Three Dimensional ◽  
Petroleum Products ◽  
Technical Condition ◽  
Excess Pressure ◽  
Soil Parameters ◽  
Theory Analysis ◽  
Pressure Testing ◽  
Tank Pressure ◽  
Over Time

This article studies the process of relaxation of the pressure in a tank with the damaged area of the wall after pressure-testing. The authors use different methods for the diagnosis of the technical condition of objects of petroleum products storage. Pressure testing is one of nondestructive methods. The rate of pressure decrease is characteristic of the system tightness. This article studies the cases of ground and underground location of the tank. Pressure testing involves excess pressure inside of a tank and observing its decrease. Over time, one can assess the integrity of the system. This has required creating mathematical models to account the filtration of the liquid depending on the location of the tank. The results include the analytical solution of the task and the formulas for describing the dependence of the relaxation time of pressure in the tank from the liquid and soil parameters, geometry of the tank, and the damaged portion of the wall. The two- and three-dimensional cases of liquids filtration for the case of underground location of the tank were considered. The results of some numerical calculations of the dependence of reduction time and the time of half-life pressure from the area of the damaged portion of the wall were shown. The obtained solutions allow assessing the extent of the damaged area by the pressure testing with known values of tank, liquid, and soil.

Pressure Testing of Pipelines

1987 ◽  
Vol 20 (9) ◽  
pp. 61-62
Author(s):  
Chris Kershaw
Keyword(s):  
Pressure Testing

How Many Maneuvers Should We Do for Maximal Inspiratory and Expiratory Muscle Pressure Testing in Children: A Retrospective Review in Children with Cystic Fibrosis

Lung ◽  
2021 ◽  
Vol 199 (2) ◽  
pp. 213-222
Author(s):  
Wicharn Boonjindasup ◽  
Anne B. Chang ◽  
Julie M. Marchant ◽  
J. Yoon Irons ◽  
Margaret S. McElrea
Keyword(s):  
Cystic Fibrosis ◽  
Retrospective Review ◽  
Expiratory Muscle ◽  
Pressure Testing

LWD Formation Pressure Testing Allows Decision-Making While Drilling

2006 ◽  
Author(s):  
Ulrich Hahne ◽  
Aravindh Kaniappan ◽  
Jos Pragt ◽  
Arno Buysch
Keyword(s):  
Decision Making ◽  
Formation Pressure ◽  
Pressure Testing
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