Sun Hydraulics

Sun Hydraulics is a leading American-based designer and manufacturer of high-performance screw-in hydraulic cartridge valves, valve bodies and valve accessories that control force, speed and motion as integral components in fluid power systems.

In 2017 Sun Hydraulics acquired High Country Tek (HCT), an American-based manufacturer of electronic controller products – these controllers are also available in southern Africa through Axiom Hydraulics.

Axiom Hydraulics is able to customise the Sun Hydraulics’ range of screw-in cartridge valves to suit your unique application requirements – all modifications are done according to OEM specification.

Axiom Hydraulics is the sole distributor of Sun Hydraulics in southern Africa.

View Sun Hydraulics’ products:

Pressure Relief Valves

Pressure Relief Valves

Protect your system with Sun Hydraulics’ extensive range of pressure relief cartridge valves. Flow capacities ranging from 1 l / min. up to 1 100 l/ min. and pressures ranges from 1 bar up to 420 bar.

Sequence Valves

Sequencing a system accurately and efficiently is what Sun Hydraulics’ sequence valve range offers. Flow capacities ranging from 30 l / min. up to 480 l / min. and pressures ranges from 3.5 bar up to 420 bar.

Pressure Reducing / Relieving Valves

When pressure sensitive systems require accurately fine adjustment, with minimal pressure differentials Sun Hydraulics’ pressure reducing / relieving range couldn’t be more comprehensive. Fine tuning ranges from 1.7 bar to 315 bar with flow capacities up to 320 l / min.

Counterbalance Valves

Sun Hydraulics is a world leader when it comes to counterbalance valves. With such a variety of options to choose from, designers can optimise both efficiency and safety. Pilot ratios range from as low as 1.5:1 up to 10:1. Maximum pressure capabilities up to 420 bar with flow capacities starting from 15 l / min. up to 480 l / min.

Load Reactive / Load Holding Valves

Continuously varying loads force designers to choose the safest but usually most inefficient option when it comes to load holding, but with Sun Hydraulics’ revolutionary load reactive valves – Load Match – systems can run at optimum efficiency, while protecting your machinery and personnel.

Pilot-to-Open Check Valves

Superior pilot-to-open check valves are defined by their leakage. With Sun Hydraulics’ high-calibre design, leakage is at an absolute minimum yet still maintaining a variety of panoptic cracking pressures ranging from 0.3 bar up to 7 bar. Flow capacities range from 60 l / min. up to 480 l / min.

Check Valves

You have complete flexibility when it comes to Sun Hydraulics’ check valve cartridge applications. Choose either nose-to-side or side-to-nose for ease of compact manifold design, as well as a comprehensive range of cracking pressures starting from 0.3 bar up to 7 bar. Leakages are also at an absolute minimum.

Flow Control Valves

An important fundamental to fluid mechanics is flow control, whereby flow regulation directly determines the working speed of a select function. Sun Hydraulics’ flow control range offers a multitude of control options to suit your requirements. Flow capacities range from 1 l / min. up to 480 l / min.

Flow Divider / Combiner Valves

With a rated error accuracy as low as +-2.5%, Sun Hydraulics’ flow divider valves are the obvious choice when flow division is required in a system. High-capacity options allow for a range of 60 l / min. to 300 l / min.

Logic Elements

Sun Hydraulics screw-in logic element cartridge valves can boast superior efficiency when compared to the slip-in cartridge style used by most competitors. Smooth and accurate modulation gives your design elegant yet precise functionality. High flow capacities can reach up to 760 l / min.

Directional Valves

Fast response, high accuracy and a multitude of control variations characterise Sun Hydraulics directional control valve cartridges. From 1 l / min. up to 480 l / min. flow capabilities, and variable pressure ranges from 1.7 bar to 350 bar.

Solenoid Operated Valves

Electro-hydraulic systems have become favoured in most modern hydraulic systems. Sun Hydraulics offers a complete range of various valve configurations as well as numerous spool overlap phases to suit your functional requirements. These medium flow capacity valves offer high efficiency throughout any selection and with flow capabilities from 1 l / min. up to 45 l / min. All valves can see a maximum of 350 bar.

Pilot Controlled Directional Valves

Adding to the versatility of the Sun Hydraulics’ cartridge valve range, we can offer low capacity pilot control valves specifically designed to be incorporated with ventable or externally piloted valves. The most pioneering aspect to this range is the flexible modulation with T8 cavity option cartridges, saving time, money with additional cavity manufacturing.

Shuttle Valves

Sun Hydraulics’ signal shuttle valves make manifold design even more flexible with an assortment of port orientations to choose from. Low-leakage rate ensures that your signalling is never compromised. High-capacity ‘Hot Oil’ shuttles are also available, reaching an impressive 480 l / min. All ranges can see a maximum pressure of 350 bar.

Standard Valve Bodies

Sun Hydraulics offers a full range of valve bodies to suit your individual cartridge requirements. You have countless variations of cavities and port sizes to select from. These bodies come in aluminium (200 bar max.) or steel (350 bar max).

Flex Series

Sun’s new FleX series pressure or directional control valves offer higher T-8A and T-162A cavity flow capacities, at lower costs.

Sun Hydraulics Accessories:

Sun Hydraulics’ range of valve accessories (valve seal kits, coils, control options and filter elements) extends the versatility and performance of hydraulic circuits.

Sun XMD Drivers

Sun’s new XMD Bluetooth-configurable, electro-hydraulic driver is both CE and E-Mark rated, meeting the needs of international mobile and industrial equipment.

Chat to us about Sun Hydraulics in your hydraulic application! 

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Contact Axiom Hydraulics today on +27 11 334 3068
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Sun Hydraulics products tailored to your application:

Axiom Hydraulics has nearly 30 years’ experience in designing, manufacturing, supplying, repairing and servicing the Sun Hydraulics range of screw-in cartridge valves to suit the hydraulic needs of southern Africa’s mining, marine and agriculture industries.

We utilise state-of-the-art manufacturing, testing and calibration machinery to ensure long-lasting, OEM-specified performance for all product modifications.

Sun Hydraulics products in stock!


Axiom Hydraulics holds one of the largest site stockholding of hydraulic equipment in Africa, including Sun Hydraulics valves, valve bodies and accessories.

Axiom Hydraulics also holds critical hydraulic spare parts to minimise downtime for clients.