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Reciprocating Pump P&ID Configuration

Reciprocating pump is a class of positive displacement pump which includes piston pump, plunger pump, and diaphragm pump. It is often used where a relatively small quantity of liquid to be handled and where delivery pressure is quite large. Priming is not required because it is positive displacement pump. Reciprocating pumps have lower efficiency compared to centrifugal pump.

API 674 – Positive Displacement Pump – Reciprocating covers minimum requirements for reciprocating positive displacement pumps for refinery application. The standard also covers piping and instrumentation required for the pump. Read More

Microbial Inhibitor for Cooling Water Treatment

My company is trying to be a vendor of small equipment package, such as chemical injection. I actually have a limited knowledge about this area, but in my understanding, chemical injection package is very simple. It usually consists of chemical storage tank, dosing pump, mixer, and accessories, such as low level switch, controller, and so on. The job became a  bit complicated when we don’t have enough knowledge about that.

However, to improve the ability as a vendor, my company decides to try to enter this area. The good news is I also participate. 

Our first project is to supply chemical injection system for cooling water treatment.  Read More

Hydraulic Pump Calculation

Yesterday I just finished doing hydraulic pump calculation for one of a project in my company. The purpose of the calculation was to determine suction pressure, discharge pressure, and pump differential head.

Pump calculation procedure is very simple.

First, you need to define pump operation condition. It includes fluid temperature, fluid specific gravity, fluid viscosity, pump normal capacity and design capacity.

Second, check your Piping and Instrumentation Diagram (P&ID) carefully. In this step you need to calculate pressure drop due to pipe line and fittings in the suction and discharge of pump. You need to list fittings and calculate pressure loss due to the fittings.

Total suction head = line loss + loss due to accessories + suction head

Do the same thing as for discharge head.

Differential head is calculated by this formula

Differential head = total discharge head – total suction head. 

 

Pump Inspection and Factory Acceptance Test

The opportunity to witness Factory Acceptance Test (FAT) of pumps came to me. About a week ago I visited our vendor’s factory at Industrial zone in Pulogadung, Indonesia. Our plan was to witness the performance of three different pumps.

www.torishimaguna.com

Our pumps were not API pumps therefore the performance test procedure was quite simple and quick. The performance test of one pump took less than 30 minutes. However, the preparation, such as mobilization of pump, installation, make sure there’s no leak in the pipe, took longer time than the test itself.

There are several parameters to be checked during test, suction head, discharge head, rpm, power, voltage, bearing temperature, vibration level, and noise level. The pumps were operated under different flow rate, such as 0%, 25%, 50%, 100%, and 120% capacity, and at minimum flow. Those parameters were checked at different flow condition.

After we got the actual parameters, we plotted on the graphs. Then we compare the actual performance with design performance. The deviation shall not more than 6%.

 

Storage Tank Selection

In my recent project, there are at least eight liquid storage tanks we need to design and purchase. Although, the design of storage tank is not part of my work (it is a job of mechanical engineers), but I always wonder how people design the tanks. In this post, I want to share to you the results of my desktop study about liquid storage tank selection. Read More

Vacuum Belt Filter: Get to Know

Today (4/30), I asked my Boss if he wanted to join us to have site visit to Dawuan, Cikampek. One of our upcoming project will be Bankable Feasibility Study of Carboxymethyl Cellulose Plant. He told me that he basically liked travelling. I sensed something positive would be coming. However, he asked me to find a lot of information about Vacuum Belt Filter, to list the information required to design vacuum belt filter, and to find technical drawings of vacuum belt filter. It was a bit hard job to do. But, I feel a lot of fun. Read More