How picking the right elastomeric hydraulic seal material is more than just chemistry and a catalogue. Use a seal material catalogue Useful elastomer materials What to watch out for Formulations change over time Specialist compounds Shelf life Machined seals Talk to an applications engineer After 30 years, Sarum Hydraulics knows quite a lot about seals [...]
We use these capped piston rod bearing seals extensively. Trelleborg call this type of seal a “stepseal”, although lots of people produce their own versions. Why do we like them? They offer extended life, cope with fluids with poor lubricity and allow you to easily swap the elastomeric O ring that fits under them to [...]
Just like the stepped piston rod bearing seals, we use these capped piston seals extensively. Why? They offer extended life, cope with fluids with poor lubricity and allow you to easily swap the elastomeric O ring that fits under them to cope with a wide range of fluids and temperatures. A moulded seal rarely gives [...]
Why do we like U seals? If you don’t need to offer a wide range of fluids and temperature ranges using one size of groove, a U seal for a piston rod bearing can be a great choice. Pick polyurethane (PU) and you have a remarkably rugged seal. The temperature range of down to -30 [...]
Specifying a standard hydraulic pressure gauge manometer range makes life so much easier. After 40 years, we think we are finally getting to grips with which ranges are standards in what country. We thought we understood it but even now still struggle every time somebody tells us the range specified is not available. Our [...]
Proof testing versus burst testing: what is the difference? It is important to decide what your objective is, as pressure or proof testing is not the same as burst testing. Pressure testing Pressure testing, proof testing or proof pressure testing: What should appear on my proof testing certificate? In truth, these could be considered different [...]
SARUM HYDRAULICS LIMITED Application notes. Two speed hand pump. How do I select a two speed hydraulic hand pump? When do you need a two speed hydraulic hand pump? What are the basics and how do I not get caught out with the wrong kit? Basics. Hydraulic hand pumps: The Basics A hydraulic hand pump [...]
