Category: MACHINERY

MACHINERY, Mechanical8 Comments

Pump Components: Volutes, Casings, and Impellers

Amarine Antonio

When you boil them down to the most fundamental components, pumps are made up of two components: An impeller which creates velocity through rotation, And a casing which converts velocity into pressure. There are different types of impellers and different types of casings. The way that different types of impellers and casings are combined produces all of the different types of pumps. Types of Pump Casings There two basic types of pump casings: volutes and diffusers. Whether we’re talking about volutes or diffusers, what all casings have in common is that they are designed to take energy in the form of … Continue reading Pump Components: Volutes, Casings, and Impellers

MACHINERY, OIL & GAS1 Comment

CJC Desorber / Filter unit: what is it?

Thanh ( QC ) Nguyen Le

Dear all, This topic we will talk about CJC Desorber / Filter combine unit! These below questions will be discussed and we will know general about CJC unit. 1) What is CJC? 2) Application? 3) How does it made? 3) How does it operate? 4) Why do we need it? 5) How to use? … Now we start: 1) What is it – CJC unit? Sometime we see it in Stern tube Lub. Oil P&ID dwg: CJC Desorber/Filter Unit is a combined product used for maintenance of oils. The unit removes large amounts of water and particles from a wide range of lubricants including … Continue reading CJC Desorber / Filter unit: what is it?

MACHINERY3 Comments

Propeller System: Bolt Tightening for Propeller Blade!

Thanh ( QC ) Nguyen Le

We will talk about How to tight for bolts of blades after assembly! Have some method to do it. But in this topic we will say a simple way to do it & not need modern equipment or tools to do. We will use chain locker! We will take an example for easy understand! 1.Mounting propeller blades: Blades marked according to above figure , Aft view. Mounting sequence: 1-3-2-4. 2. Bolt tightening for blade: – Both pre-tighten and final tighten of the blade bolts with can be done by using socket adapter and ring spanner (a chain block suspended wrench) … Continue reading Propeller System: Bolt Tightening for Propeller Blade!

CHEMICAL TANKER, MACHINERY, SHIP SURVEY1 Comment

General about Marine Fuels!

Thanh ( QC ) Nguyen Le

Marine fossil fuels: The majority of the existing and proposed marine fuels are of the same origin. The same fuel composition may be available from renewable sources (e.g. natural gas – bio gas, methane…) but here only the most common are taken into consideration. + How is a crude oil feld formed? The generally accepted theory is that crude oil was formed over millions of years from the remains of plants and animals that lived in the seas. As they died, they sank to the seabed, were buried with sand and mud, and became an organic-rich layer. Steadily, these layers … Continue reading General about Marine Fuels!

MACHINERY, PIPING1 Comment

Zinc in the Fuel oil (affection on Machinery explanation & experiment, gears, and prevention)

Thanh ( QC ) Nguyen Le

For marine work, we have tank and pipe to store & transfer oil. Now this topic will search about the effect of Zinc coating for tank and pipe in fuels oil. The concentration of zinc in a fuel was found depend upon … Continue reading Zinc in the Fuel oil (affection on Machinery explanation & experiment, gears, and prevention)