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 [...]
Tech helps in fighting the hydraulic contamination battle. If anybody tells Sarum Hydraulics that there is a “contamination issue”, we insist on digging deeper. Maybe that was an acceptable blanket excuse in 1986, but not today. We just need to know what it is. We had an “old school” optical microscope for years, a cheap [...]
Cutting through to hydraulic cleanliness. With lots of suppliers all pushing their products, it can be easy to lose the plot on hydraulic cleanliness. Is cleanliness an issue? After 30 years, Sarum thinks that dirty hydraulic systems are a menace. Yes, they may well work in a disgusting state for years, but chances are there [...]
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 [...]
How clean hydraulics is the key to reliable hydraulics. Cleanliness is key to reliable hydraulics. Yes, you may get failures for assorted engineering reasons, but our take is that building systems clean dramatically improves reliability and that then flushing a system can be an amazingly good investment. Keep in mind the difference between building clean [...]
Wouldn't it be great to top up your hydraulic system from the tap? Some industries do this. They pay the extra cost of the system components from Danfoss or Tony Markham at the Water Hydraulic Company and use water. Some industries like mining or steel-making find water essential for safety reasons. Pressure testers like it [...]
