What exactly is stainless steel?
Stainless steel is a group of iron-based metal containing at least 10% chromium (alloy metals).
The chromium oxide "CrO" creates an invisible barrier ("passive film") to oxygen and moisture. Therefore the chromium protects the iron against most corrosion or red-coloured rust; thus the term "stainless" steel.
The layer is too thin to be visible, meaning the metal stays shiny. It is, however, impervious to water and air, protecting the metal beneath. Also, when the surface is scratched this layer quickly reforms.
The purpose of stainless steel is to provide hard steel material highly resistant to stain, rust and corrosion and resistance against:
- Adverse atmospheric conditions such as carbon dioxide, moisture, electrical fields, sulphur, salt, and chloride compounds
- Natural and artificially produced chemicals
- Extremes of weather such as cold and wet conditions
So, what makes the RECORD range different to other stainless steel trucks?
Materials
The range is manufactured almost entirely from 304 grade stainless steel. Other manufacturers make certain key components from mild steel, which is then galvanised or chromated; these processes are fine until the component becomes scratched or dented when it becomes obvious that galvanisation or chromation are just surface coating techniques. Under the coating, mild steel can be exposed leaving the equipment open to the outside world of chemicals and bacteria.
Type 304 stainless steel is a T 300 series stainless steel austenitic. It has a minimum of 18% chromium and 8% nickel, combined with a maximum of 0.08% carbon. It is defined as a Chromium-Nickel austenitic alloy.
Grade 304 is the standard "18/8" stainless that you will probably see in your pans and cookery tools.
These are some of its characteristics:
- Forming and welding properties
- Corrosion/ oxidation resistance thanks to the chromium content
- Deep drawing quality
- Excellent toughness, even down to cryogenic temperatures which are defined as very low temperatures
- Low temperature properties responding well to hardening by cold working
- Ease of cleaning, ease of fabrication, attractive appearance
The RECORD range of stainless steel equipment is manufactured to the highest possible standards, almost entirely from 304 grade stainless steel.
Stainless steel equipment is designed particularly food, chemical and pharmaceutical industries where cleanliness is of paramount importance. Being manufactured from stainless steel, the trucks can be washed without fear of rusting and allowing hygienic conditions to be maintained.
Design
The range is designed to be simple and ergonomic to use; the trucks are, after all, designed to make your work easier, safer and more productive.
IP Rating
Whilst the term IP rating may not be familiar to you, EN 60529 outlines an international classification system for the sealing effectiveness of enclosures of electrical equipment against the intrusion into the equipment of foreign bodies (i.e. tools, dust, fingers) and moisture. This classification system utilizes the letters "IP" ("Ingress Protection") followed by two or three digits.
The minimum IP rating throughout the RECORD range is IP54 which, in simplest terms means that any part of the truck can be washed at low pressure. Of course, other parts such as the chassis can be washed with high pressure hoses.
Electronics
At the heart of all fully powered trucks is the electronic controller. All of our stainless machines utilise the latest in alternating current (AC) technology.
Traditionally, machines have always used Direct Current (DC) to power the drive motor. In both DC or AC systems, a controller is used to manage the voltage and
current supplied to the motor. The main difference is that an AC controller will first transform the energy from the battery (which is DC) into AC.
By using AC, the truck can utilise a different type of drive motor called an Induction Motor (IM). Unlike DC motors, the IM does not need brushes and neither a commutator in order to rotate. Instead, it uses an induced magnetic field, thereby eliminating these friction between components.
The AC Induction Motor has further advantages over DC motors:-
- IM does not require carbon brushes and commutator. This means:
- Smaller motor dimensions
- No sparking and electrical noise
- No wearing parts (apart from bearings)
- No top speed limitation
- Can be stalled without problems
- Virtually Maintenance free
- Direction of movement can be changed in a much more smooth and controlled manner
- Slow, precise (creep) speed can be achieved
- IM is more reliable
- IM is more robust
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