When do I have to use a double acting hydraulic cylinder and why? Sometimes, a double acting hydraulic cylinder circuit is the only way to achieve your requirements. What are basic design considerations? Single versus double acting cylinders. Sometimes your design needs push and pull. The single acting configuration is left and double [...]
How do you use a single acting hydraulic cylinder cheaply, effectively and safely? We are fans of single acting hydraulic cylinders if they work for your application. Read how. We would always start by asking whether we can use a single acting cylinder. Without a doubt, there are key reasons for using one if [...]
Our Micropac MW pumps are often piped into systems rather than supplied on a reservoir with suction tube already in place. What suction tube is right, which is wrong, and how long can a suction tube be? This is a basic question, but not commonly asked. Maybe hydraulic engineers get on with it from [...]
A pump check valve has complexity and needs to be right. How to design inlet and outlet check valves for your pump. Are the check valves for a pump the same as catalogue hydraulic check valves? We would say no. Lots of features are the same but there are some big differences. Are the [...]
What you need to know to configure your 2 speed PSP, HMP, MHX or Hydrapak pressure test pump. Our Micropac PSP 2 speed hydrostatic pressure test set Why has this pump format been so popular for decades? This style of pump is a great workhorse for pressure testing for the shop, site or [...]
Why is my hydraulic hand pump such hard work? Make using a hydraulic hand pump as easy as possible. A hydraulic hand pump is the ultra-dependable pump with no battery or electronics Hand pumps are a great piece of kit. There are no batteries or electronics. They are dependable in an emergency [...]
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 [...]
