Question 1

What Safety Precautions Should You Take When Working with Hydraulic Cylinders?

Accepted Answer

Hydraulic cylinders are used for various tasks that involve pulling, lifting, bending, or holding. With so many ways they can be used, comes a lot that can go wrong.

To avoid the risk of harm while using such cylinders, there are many safety precautions you need to consider.

80% Rule

When it comes to setting up an optimal hydraulic system, your primary concern should always revolve around safety, both for yourself and others involved. When using hydraulic cylinders, it is advisable to limit usage to only 80% of the load and stroke ratings, as most loads are not lifted on their true centre, which introduces an external side load force and increases the risk of load instability.

Provide Support

For a cylinder to operate safely and efficiently, it necessitates to operate on a firm and level base. This implies that the cylinder's operation should be placed flat on the ground, i.e. stabilizer legs or outrigger on a crane. It's crucial to ensure that the surface beneath the cylinder is free from any debris. If you have any doubts about the stability of the surface, it's recommended to employ a base plate for added stability.

Pressure Gauge

A pressure gauge is a vital component of any hydraulic system. Using a pressure gauge helps to monitor the force applied on the cylinder within the reasonable margin of safety. This is not only important for safety, but it is also necessary for maintaining the quality of your equipment.

Cylinder Condition

Before using a hydraulic ram cylinder, it's crucial to inspect it for signs of damage. If any damage is detected, the cylinder may not function properly and should not be used. There are various reasons why a cylinder might not work correctly which could cause system failure that leads to safety hazards and injury.

Reasons why a cylinder may not function properly:

A cylinder will not extend if the coupler is not fully tightened, the pump is worn, the oil level is too low, the pump is malfunctioning, or the pump pressure relief valve is set too low. Additionally, if the cylinder is already at full stroke, it will not extend further.
If a cylinder only extends partially, this may be due to insufficient oil capacity or an external obstruction or bent rod.
When a cylinder does not extend smoothly, it could be due to air in the system.
If a cylinder extends but cannot hold the load, it may be due to leaking seals, a malfunctioning pump or valve, or a leaking connection.
Cylinder leakage may occur due to cylinder or seal damage or a loose connecter.
Cylinders may be slow to retract or not retract at all, this can be caused by a loose piston seal carrier or damaged piston seals, or worn hydraulic pump.

Replacing hydraulic cylinder seals and parts

FPE Seals provide replacement parts for all hydraulic cylinders and specialise in providing sealing solutions for aftermarket and OEM applications. View what is on offer on our website or contact one of our knowledgeable team today who are happy to advise on finding you exactly what you need.

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Question 2

What types of seals are used in the marine industry?

Accepted Answer

Onshore and offshore, the marine industry works within vast and challenging environments, relying heavily on precision engineering to ensure the safety, efficiency, and longevity of its equipment.

Seals are used effectively in maintaining the integrity of various marine applications to prevent leaks and protect operating systems for optimal performance.

Types of seals used in the marine industry:

Mechanical Seals: Used to prevent fluid leakage ensuring that oil, water, or chemicals don't infiltrate the machinery and cause damage to internal components, commonly found in pumps and propeller shafts, where maintaining a watertight seal is critical.

Gaskets: Commonly used in flanged joints, providing a reliable barrier against fluids and gases. Gaskets come in various materials including rubber, cork, and metal, depending on the required properties for the application. In marine engines and boilers, gaskets are utilised to prevent the escape of steam and other fluids, contributing to the overall safety and efficiency of the equipment.

O-Rings: Commonly used in the marine industry due to their versatility and reliability. These circular elastomeric seals create a secure barrier against fluid or gas leakage in applications. O-rings are typically placed in grooves or recesses and are compressed between two mating surfaces.

Hydraulic Seals: Designed specifically for use in hydraulic systems. These seals are vital in marine applications, particularly in hydraulic cylinders used for steering systems, hatch covers, and other moving parts, maintaining the stability and flexibility of the application.

Oil Seals: Also known as shaft seals, designed to prevent the leakage of lubricating oil from rotary shafts. These seals are commonly used in engines, gearboxes, and propulsion systems where rotating shafts are prevalent. Oil seals help in extending the life of machinery by preventing the loss of essential lubricants.

Washers: Thin, flat rings used to distribute loads and prevent leakage between connected components. Washers are employed in various applications, such as flanged connections, valves, and pumps. They help distribute the load evenly and create a reliable seal, contributing to the overall integrity of the application. Available in different materials, including rubber, metal, and fibre, depending on the specific requirements of the application.

Retaining Rings: Also known as circlips or snap rings, are used to secure components on shafts or in bores. In marine applications, retaining rings are utilised in propeller shafts, bearings, and other rotating components to prevent axial movement and ensure the stability of essential parts.

Back-Up Rings: Are used in conjunction with O-rings and other seals to provide additional support and prevent extrusion under high pressures. In the marine industry, where hydraulic and pneumatic systems operate under challenging conditions, back-up rings are employed to enhance the durability and performance of seals.

FPE Seals stocks and manufactures a full range of sealing solutions and hydraulic cylinder products that best serve operations related to the offshore and onshore business of ships, boats, yachts, subsea equipment, maritime infrastructure, and technology, whether that be for naval, commercial or leisure.

Order online today or get in touch with our knowledgeable team here at FPE Seals, who will discuss your requirements based on your application, and help you find the right seal for the job.

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Measure a Hydraulic Cylinder

Key Measurements for Hydraulic Cylinders

Primary Components for Hydraulic Cylinder Measurement

Check Out Our Hydraulic Cylinder Measurement Guide

What to read next...

What Safety Precautions Should You Take When Working with Hydraulic Cylinders?

What types of seals are used in the marine industry?

Measure a Hydraulic Cylinder

Key Measurements for Hydraulic Cylinders

Primary Components for Hydraulic Cylinder Measurement

Check Out Our Hydraulic Cylinder Measurement Guide

What to read next...

What Safety Precautions Should You Take When Working with Hydraulic Cylinders?

What types of seals are used in the marine industry?

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