INTRODUCTION Proper maintenance policy can play a vital role for effective investigation of product reliability. Every engineered object such as product, plant or infrastructure needs preventive and corrective maintenance. CASE DESCRIPTION In this paper we look at a real case study. It deals with the maintenance of hydraulic pumps used in excavators by a mining company. We obtain the data tha...

In this paper, we focus on a continuously deteriorating critical equipment which its failure cannot be measured by cost criterion. For these types of systems like military systems, nuclear systems, etc it is extremely important to avoid failure during the actual operation of the system. In this paper we propose an approach which constrains failure probability to a pre-specified value. This valu...

The trend toward higher speed, higher power density liquid turbomachinery has inevitably increased the potential for fluid/structure interaction problems, and the severity of those problems. Fluid structure interaction phenomena can lead to increased wear and to structure failure. There are many factors affecting hydraulic and dynamic performance of pumping plants. These factors contribute to d...

The throttling process is frequently encountered in many industrial practices utilizing Pressure Reducing Valves (PRVs). This typically used to control pressure and flow pipeline networks. practice of PRVs considered simple cheap terms installation cost control. It dissipates the excess fluid energy that can be for other purposes. paper studies feasibility Pump as Turbine (PAT) concept partiall...

The management of a population of centrifugal pumps in the petrochemical industry can be daunting. A popular method for strategically optimizing the maintenance and operation of these centrifugal pumps is to measure the reliability of the whole pump population in terms of Mean-Time-Between-Failures (MTBF). Too often MTBF improvement becomes the focus rather than a means of supporting the actual...

As the core component of valve cooling system in a converter station, main pump plays major role ensuring stable operation valve. Thus, accurate and efficient fault diagnosis according to vibration signals is positive significance for detection failure equipment reducing maintenance cost. This paper proposed new neural network based on classify four faults one normal state pump, which consisted...