How to Properly Select and Connect a Motor Brake Rectifier?

The brake rectifier is an important component of the electromagnetic motor brake control system.

Its purpose is to properly supply the brake coil, therefore, when selecting and connecting the rectifier, attention should be paid not only to its type, but also to the supply voltage, connection method and requirements of the specific application.

Incorrect selection or mixing up the wires may cause improper brake operation and, in extreme cases, lead to damage to system components.

Symmetric and Eccentric Steel Reducers for Welding – What Is the Difference and How to Install Them?

Steel reducers for welding are used to connect two pipe sections of different diameters.
They are used, among others, in industrial, process, water, steam, gas and heating installations.

The most important difference between a symmetric and an eccentric reducer is not limited to appearance.
The different design of the reducer affects the routing of the installation, the flow of the medium and the possibility of air, gas or condensate accumulation.

There is no single material that is ideal for all applications. The choice depends on where the bushing operates, the load and the method of lubrication.

If we are talking about a motorcycle, the question is too general. RG7 is an excellent material for classic bearings and plain bushings in machinery, but I would not recommend it blindly for a motorcycle.

For example:

• swingarm bushing – aluminium bronzes or special sintered PTFE bushings are often used rather than RG7.

• connecting rod – definitely not RG7.

• suspension – bushings with self-lubricating coatings are often used.

• gear shift lever – RG7 can be a good choice.

• kickstarter, footrests – it can also work well.

Conical union seals on a metal conical surface and does not require an additional gasket.

Flat-face union provides tightness thanks to a flat gasket placed between two surfaces. The choice of the appropriate solution depends on the type of installation, medium and operating conditions. At POLBERIS, we help select the right type of union for every application.

How to Choose a Gasket for Gas? Check Whether It Has the Appropriate Approvals

In gas installations, safety is the most important factor. Even the best flange or valve will not ensure tightness if the wrong gasket is used. One of the most frequently asked questions we receive from POLBERIS customers is:

Which gasket should be selected for gas that has the appropriate approvals?

The answer is simple – only materials with the appropriate certificates for use with gas should be selected, e.g. a Gambit AF-300 or Temasil HT gasket.

What Is the Difference Between a 2D, 3D and 5D Elbow?

The shortest answer is: 2D, 3D and 5D elbows differ only in the bend radius.

The larger the number before the letter D, the larger the bend radius.

DIN 910 and DIN 908 plugs seal in the same way. They differ only in the way they are tightened.
The DIN 910 plug has a square head on top, while the DIN 908 plug has a hex socket.

What Is the Difference Between A105 and A105 HDG Steel ?

✅ A105 – is carbon steel intended for the production of pressure components such as threaded fittings, flanges or valves.

✅ A105 HDG – is exactly the same ASTM A105 steel, but additionally hot-dip galvanized (HDG – Hot Dip Galvanized).

BSP vs NPT – What Is the Difference Between the Threads and Why Must They Not Be Connected?

BSP or NPT? This is one of the most frequently asked questions.

At first glance, BSP and NPT threads look very similar. Many users try to connect them because the component “screws in a few turns”. Unfortunately, such a connection very often results in leakage or thread damage.

If you work with hydraulic, pneumatic or industrial installations, it is worth knowing the basic differences.

Difference between two types of connections: butt weld (BW) and between BW and socket weld?

1. What is BW (butt weld, butt-welded joint)

• Connection of two pipe ends positioned face to face (end to end)

• Advantages: greater strength and tightness with a properly made weld, better resistance to high pressures and temperatures.

• Disadvantages: requires precise preparation and alignment, longer labour time, inspection is often necessary

• Applications: pressure installations, large diameters, steam pipelines, petrochemical industry.

2. What is Socket weld (socket weld)

• The pipe enters a socket of the corresponding shape of the component, the gap is welded around the face (a fillet weld is made).

• Advantages: easier alignment and installation, lower edge preparation requirements, good for small diameters (usually from 1/4"–4").

• Applications: small diameters, i.e. max. up to 4''. For installations where quick assembly is important.

FKM FPM Metal-Rubber Washers

Stainless steel metal-rubber washers (abbreviated as MET-GUM) - are used for sealing threads, both metric and inch threads. Thanks to the appropriate rubber profile, they perfectly seal external threads, steel threaded fittings, nipples, connectors, unions, etc.

The FKM metal-rubber washer has the following features:

• material: stainless steel + FKM rubber (Viton)

• easy and quick installation

• self-centering washer

• elimination of leaks

MET-GUM washers have outstanding properties.

If you are looking for gaskets, washers for sealing threads, especially where high temperatures, aggressive media and chemical resistance requirements occur, use MET-GUM FKM VITON washers.

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SPA Pendant Control Station for Overhead Crane – Reliable Auxiliary Control for Heavy Industry

The pendant control station - model SPA, manufactured by TER from Italy, is a solution designed for difficult operating conditions in heavy industry and the construction sector. A durable, modular enclosure, high degree of protection IP65 and the possibility of freely configuring the pushbuttons make SPA TER pendant control stations one of the most popular solutions for controlling overhead cranes, lifts, hoists and other machines.

SPA TER Pendant Control Station – Application in Industry and Construction

SPA TER pendant control stations are ideal wherever the following are required:

• safe and precise operation of lifting equipment,

• resistance to difficult environmental conditions,

• possibility of configuring multiple functions in one compact control station.

Most common applications:

• pendant control station for overhead and gantry cranes,

• hoists,

• pendant control station for lifts, elevators, cranes,

• industrial machines,

• auxiliary control in industrial plants and on construction sites.

Loose Steel Flange

In this blog, you will learn about its application, material facts and why it is worth buying a loose flange from Polberis.

A loose steel flange is one of the commonly used components for connecting pipes and pipe nipples in industrial, water and sewage installations. Unlike fixed flanges (e.g. weld neck flanges), a loose flange is not permanently welded to the pipe.

How is a loose flange installed?

First, the loose flange is slid onto the pipe, and then a stub end or ring is welded to the pipe, which provides support for the flange and prevents it from slipping off. Two pipe sections prepared in this way are positioned face to face and bolted together, creating a tight and stable connection.

TEMASIL NG Gasket – Universal Flat Gaskets for Steel Flanges

TEMASIL NG gasket sheet is one of the most commonly used materials for flat gaskets for flange connections. It performs excellently both in industrial installations and in conventional piping systems, where tightness, safety and repeatability of connections are important.

In our PolBeris shop, you can not only buy the original TEMASIL NG sheet, but also order gaskets cut to size - matched to a specific steel flange, according to your documentation or with the help of our technical advice.

Wear-Resistant Steel Plates

In this blog, you will learn what wear-resistant steel plate is and what properties it has.

Wear-resistant steel plates – are wear-resistant steel with exceptional properties, the use of these plates offers enormous possibilities for application in many branches of industry.

These plates have significantly greater resistance to abrasion, crushing, impact, as well as high resistance to mechanical loads. The key designation is hardness on the Brinell scale (HB).

Examples of applications of angle fittings, including weldable Hamburg elbows, return bends and threaded angle unions

Weldable Hamburg elbows, return bends and threaded angle unions are key elements of pipeline infrastructure, used in many industrial sectors. Thanks to these fittings, we can freely change the direction of medium flow. Below I present specific examples of the most typical applications:

Which gasket to choose for fuels, crude oil, gasoline and petroleum-based substances

In applications involving the transport, storage and processing of fuels, crude oil, gasoline and petroleum-based substances, the selection of appropriate sealing materials is extremely important. In such environments, the medium often has an aggressive chemical effect, and operating conditions – such as variable pressure, temperature or the presence of hydrocarbons – place high demands on gasket sheets.

In this blog, you will learn which gasket to use for crude oil, gasoline and petroleum-based substances.

Steel Heads – Applications and Types

Heads are widely used in various industries. They can be divided according to the manufacturing standard, i.e. e.g. shape, steel grade and intended use as well as manufacturing standards. This blog presents the main types and applications of heads.

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