Regarding the issue of vulnerable parts in moving equipment

Sliding bearing. The end caps of Michel bearings (tilting pad bearings), as well as the thrust discs, oil seals, and air seals, are all wear-prone components

The topic is a bit broad; it’s best to check the corresponding manual, as it usually contains a list of recommended wear parts. If there is no available information and one needs to summarize it themselves, the following points should be considered: 1. Areas prone to leakage, such as the seals of pumps, oil seals, gaskets, etc.; the dry gas seals in centrifugal compressors and gaskets; the intake and exhaust valves of reciprocating compressors; the packing and sealing gaskets on piston rods, etc. 2. Bearings, bushings, and other components that are prone to wear due to rotation. 3. Components of centrifugal pumps that are prone to corrosion, such as the impeller and shaft sleeves.

That’s a really great question of yours. If you have the money, it’s better to stock up more according to the plans, who knows what might break. If you don’t have money, get some tiles, bearings, oil seals, mouth rings, and machine seals. When carrying out maintenance, pray that spare parts are available.

This post was last edited by ddfmy on 2016-12-2 09:24. The common wear-prone components of pumps are: bearings (most prone to wear), mechanical seals (most prone to wear), coupling pins (bolts) and elastic blocks (most prone to wear), mouth rings, shaft sleeves, and shafts. The vulnerable components of centrifugal compressors include: bearings (bearing shells and their sealing elements), gas seals, coupling accessories, various sealing parts (including various regulators, oil pressure and control systems as well as actuators, cylinders, bearing housings, inlet and outlet flanges in different areas, etc.), and temperature and vibration measurement probes in various locations. Other main engine manufacturers should provide a list of such components. Wear parts of reciprocating compressors: various shaft bearings, piston rings, piston guides, piston rods (piston rods should technically be classified as failure-prone parts, but they tend to break quite often); connecting rods (which should also be considered failure-prone parts, as they are prone to damage as well, so it’s necessary to have some on hand); large bolt for the connecting rod, valve assemblies, valve accessories (mainly valve discs and springs); various sealing gaskets. Pistons are also failure-prone parts, but it’s advisable to keep some in stock to avoid long procurement times that could disrupt production. Actually, the best approach is to determine it by discussing with the company’s maintenance staff based on the manufacturer’s list.

It seems the explanation upstairs is quite detailed

Centrifugal pump: mouth ring, mechanical seal. Centrifugal compressor: sliding bearing, dry gas seal. Reciprocating compressor: packing, cylinder liner, air valve

Regarding this issue, for example, if you prepare the shafts, they might not cause any problems for two or three years. But it can’t be broken. Have some of everything ready; it depends on your own operational situation. After some time of trying, you will gain experience.

Keep some in stock; at least have a complete set. Sometimes, even the lack of a single screw can cause a lot of trouble

A couple of spindles do need to be kept on hand as well

It’s better to be prepared; apply for as many as you can