Assorted O Ring compounds. Image courtesy of Eastern Seals Can I find a universal seal or is this chasing the Holy Grail of materials? Wouldn’t it be amazing to order in your fluid power hydraulic pump with a single seal compound? A hydrostatic pressure test pump fill or charging unit that can be [...]
Can I pressure test on flammable fluids including gasoline? How risky is it to test on highly inflammable fluids at low or high pressures? There are a massive range of flammable fluids and equipment using them. How do you test the high pressure fuel system on this amazing Mercedes F1 engine? You can [...]
Sarum Hydraulics has designed and manufactures its own high quality hydraulic pumps for over 35 years. Let’s look at the bigger picture on leaks in hydraulic systems. Sound design, controlled manufacture and proactive maintenance will largely eliminate leaks. Unwanted leaks are bad for the hydraulics industry and terrible for the Environment, so this is our [...]
This is what we have learnt about fitting hydraulic seals into our pumps. They will be relevant to most other hydraulic equipment. We will add to it and are always happy to receive feedback. Contents: Three tips for easy hydraulic sealing before you start. Things to beware when you’re stripping hydraulics down! Our five big [...]
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 [...]
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 [...]
