John Foster

About John Foster

Passionate about boats, cars, art, architecture and of course, hydraulics. After 40 years as Director of Sarum Hydraulics, every day still brings new challenges and inspiring engineering in the bigger world. If you want to talk hydraulics, engineering or even boats, reach out to me on LinkedIn at https://uk.linkedin.com/in/johngfoster or contact me direct at john@sarum-hydraulics.co.uk

Aerospace Defence fill, charge, test carts UK quality

By |2026-08-12T08:36:47+01:00August 12th, 2026|Aircraft, Defence & Offshore Hydraulics, White Paper|

How to use a Micropac pump for your Aerospace GSE or Defence application. Micropac pumps have been used for decades for filling, testing and specialist GSE service fixtures for aircraft undercarriage. For over four decades, our Micropac pumps have been used worldwide in the hangar, logistics depot, on the runway, in the plant [...]

Do I need a digital gauge for my pressure tester?

By |2026-07-01T15:27:14+01:00July 1st, 2026|Hydrostatic Pressure Testing, White Paper|

Manual pressure test hydraulics goes digital. How to navigate digital pressure testing. Traditional borden tube pressure gauge, datalogging digital gauge and pressure transducer. Images by courtesy of WIKA and Hydrotechnik, After four decades of analogue pressure measurement on our Micropac hydrostatic pressure test pumps, digital is the future for many customers. Digital means [...]

How to control multiple hydraulic cylinders easily and cheaply

By |2026-02-09T08:31:17+00:00February 5th, 2026|White Paper|

Twin hydraulic cylinder on agricultural equipment. Will they work as you hoped? There are a few ways of controlling multiple cylinders in different applications. If you simply connect them up, there is every chance they won’t work or not as expected. Before jumping directly to flow dividers and position sensors, is there a simpler [...]

How to hydro/cycle test a COPV composite pressure vessel

By |2026-01-08T12:16:12+00:00January 8th, 2026|Hydrostatic Pressure Testing, White Paper|

How do I pressure test my composite overwrapped pressure vessels or COPV? Can a Micropac® PTR-A programmable hydrostatic pressure cycle tester provide effective testing at low cost? Composites have been a massive growth area in the last few decades. Some applications are designing and manufacturing massively strong structures at a low mass that was [...]

Why are composites the future for pressure vessels?

By |2026-01-08T13:54:18+00:00January 8th, 2026|Hydrostatic Pressure Testing, White Paper|

Why are composites the future for so many pressure vessels? Composite pressure vessels can offer such enormous benefits over metallic pressure vessels. There is some serious engineering in them. Why are composites so successful for the right application? Think composite and focus on strength, low mass and freedom from corrosion. Composites have brought to [...]

Why use a double acting hydraulic cylinder?

By |2026-02-25T12:00:13+00:00December 11th, 2025|Hydraulic Hand Pump Basics, White Paper|

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 [...]

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