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A well-designed hydraulic power unit possesses distinct features tailored to its intended functions. Some standard design components include:
Hydraulic power is defined as flow multiplied by pressure. The hydraulic power supplied by a pump is: Power = (P x Q) ÷ 600 - where power is in kilowatts [kW], P is the pressure in bars, and Q is the flow in litres per minute. ** based upon 100% efficiency; 90% efficiency would equate to 75 ÷ 0.9 = 83.3kW.
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For flammable liquid classifications, GHS categories 1-3 are equivalent to the ADG code packing group I-III. A change is that GHS has introduced category 4 which overlaps with the C1 combustible liquids as defined in AS1940.
The globally harmonised system of classification and labelling of chemicals (GHS) defines a flammable liquid as a liquid having a flash point of not more than 93oC. A flammable liquid is classified in one of four categories for this class according to the following table:
Persons conducting a business or undertaking (PCBUs) have specific duties to store and handle their hazardous chemicals (including flammable liquids and certain combustible liquids) as follows:
An example of flammable liquid category 4 is diesel. Thus, the use, storage and handling of diesel is subject to the requirements of the Work Health and Safety Regulation 2011 (WHS Regulation) as a hazardous chemical (Part 7.1). While combustible liquids having a flash point >93°C are not classified as hazardous chemicals and therefore not subject to Part 7.1, they are addressed by the general provisions in terms of hazard identification and management of associated risks, storage of combustible substances (r53), and contribution to fire loads (r359).
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When this energy reaches its destination, such as a hydraulic motor or cylinder, it drives the force necessary to move the components responsible for machine operation. The hydraulic power pack serves as the energy source for facilitating these actions and can generate substantial power through either rotary or linear motion. The amount of power produced is regulated and maintained by various components within the power pack.
Specific guidance on the safe storage and handling of flammable and combustible liquids is available in the Australian Standard, AS1940: The storage and handling of flammable and combustible liquids. This standard covers the following topics:
The fire and explosion risks page provides an overview of relevant risk controls including managing hazardous areas and hot work activities and controlling ignition sources.
The GHS classifications are now included in Schedule 11 where the prescribed quantities are listed for placarding and manifest thresholds. However, the manifest and placards must reflect the ADG code information as described in Schedule 12 and 13, respectively.
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Hydraulic power packs are not one-size-fits-all; each application has unique requirements. Therefore, designing a hydraulic power pack with the right components and fittings is crucial for optimal performance, reliability, and safety.
Various notifications for hazardous chemicals are required under the WHS Regulation which are relevant to the use, storage and handling of flammable and combustible liquids including for:
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Regular maintenance is vital to ensure the smooth and safe operation of hydraulic power packs. Adhering to a maintenance schedule helps identify potential issues early, extending the unit's lifespan. Maintenance tasks include checking tubing and connections, changing hydraulic fluid, and inspecting the reservoir for corrosion or cracks.
To enquire about your hydraulic power pack requirements and talk to our experts, please contact VHS Hydraulic Components on: 0114 276 4430 / E: info@www.hydraulic-components.net or visit our website at: https://www.hydraulic-components.net.
Service stations are a likely place that a member of the public comes into contact with flammable and combustible liquids on a regular basis. Further information on service stations shows how operators can manage their hazardous chemical risks.
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Hydraulic power packs, also known as hydraulic power units (HPUs), play a pivotal role in numerous hydraulic systems across various industries. These compact units are capable of generating substantial power, making them indispensable for powering hydraulic machinery and equipment. In this article, we will explore the fundamentals of hydraulic power packs, their working principles, applications, key components, and the importance of proper maintenance.
The repeal of the Dangerous Goods Safety Management Act 2001 has resulted in the abolition of the flammable and combustible liquids (FCL) licences administered by local governments. A licence to store flammable and combustible liquids is no longer required under the WHS Regulation.
Further information on controlling risks associated with flammable and combustible liquids under the Work Health and Safety Act 2011 is available in the Managing risks of hazardous chemicals in the workplace published by Safe Work Australia.
At its core, a hydraulic power pack harnesses the principles of hydraulic fluid dynamics to transfer energy from one point to another. This process aligns with Pascal's law, which asserts that an increase in pressure applied to a confined fluid will be transmitted uniformly throughout the fluid, ultimately transferring force to the opposite end of the container.
One of the notable advantages of hydraulic power packs is their portability. They come in various sizes and configurations to meet specific application requirements, and their ability to operate without direct access to a fixed power source makes them highly versatile.
Before delving into the intricacies of hydraulic power packs, let's establish a clear understanding of what they are and their primary purpose. Essentially, a hydraulic power pack is a self-contained unit designed to supply the necessary power to actuate hydraulic components within a hydraulic system, such as hydraulic motors or cylinders. These power packs are essential for applications demanding high power levels that cannot be achieved using integrated power sources alone.