• Offer Profile
  • Sun Hydraulics designs and manufactures screw-in hydraulic cartridge valves and manifolds for industrial and mobile applications. Sun's unique two-piece, floating construction ensures cartridge functionality and reliability. Standard manifolds are offered in nearly limitless variety and custom manifolds can be designed to meet specific customer requirements.
Product Portfolio
  • Cartridges

  • Sun screw-in cartridges feature the unique two-piece, floating style construction pioneered by Sun Hydraulics. Because of this construction, Sun cartridges are forgiving of cavity manufacturing variances and provide maximum valve performance with guaranteed valve-to-valve repeatability. Before shipment, every Sun cartridge undergoes a full functional test.
    • Cavity Plugs

    • Cavity plugs are available from Sun to allow for the removal of cartridge valves from a circuit while still maintaining the integrity of the hydraulic system. This is often desirable when a system needs flushing following repairs, component replacements or to change an operational function within the circuit. Cavity plugs are available in all frame sizes and are offered in a variety of styles.
    • Check Cartridges

    • Sun Hydraulics check valves feature high flow capacity relative to a small physical size. Sun check cartridges can be conveniently applied using many mounting options.
      • Available with free flow from port 1 to port 2 or port 2 to port 1
      • Available in three port versions with port 3 blocked
      • Capable of operating at pressures up to 5000 psi (350 bar)
      • Available with flow capacities up to 160 gpm (600 L/min.)
    • Circuit Saver Cartridges

    • Sun Hydraulics designs a broad array of products that defy conventional categorization, which we call circuit savers. These enabling products are useful devices that often help machine designers get around difficult and perplexing circuit problems. Check this product area periodically to see new, unusual and helpful products that are challenging to explain.
      • Pilot-to-close check valves
      • Pilot unloading valves with or without check for accumulator and braking circuits
    • Counterbalance Cartridges

    • Sun screw-in cartridges feature the unique two-piece, floating style construction pioneered by Sun Hydraulics. Because of this construction, Sun cartridges are forgiving of cavity manufacturing variances and provide maximum valve performance with guaranteed valve-to-valve repeatability. Before shipment, every Sun cartridge undergoes a full functional test.
    • Corrosion Resistant Cartridges

    • These valves are intended for use within corrosive environments. External components are manufactured in stainless steel or titanium, and are qualified by a 1,000 hour salt spray test to ASTM B117-03. In all cases, the internal working components remain the same as the standard valve.
    • Directional Cartridges

    • Sun Hydraulics provides a variety of solenoid and non-solenoid directional control cartridges that include 2-, 3- and 4-way configurations. Sun directional control cartridges can be conveniently applied using many mounting options.
      • Pilot operated and direct acting 2-way and 3-way cartridges that use the same cavity
      • Six-port pilot operated cartridges
      • 2-, 3- and 4-way solenoid cartridges with an industrial grade solenoid
      • High-pressure 2-way solenoid operated poppet valves with flow capacities up to 120 gpm (480 L/min.)
    • Directional; DP**, DR**, DV** Cartridges

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    • Electro-Proportional Cartridges

    • Sun offers a variety of electro-proportionally controlled products, comprised of both direct-acting and pilot operated versions. The direct-acting versions consist of proportional flow control, reducing/relieving and the T-8A pilot stage relief models. This pilot stage relief can be directly integrated into a wide variety of mainstage elements to form the basis of the pilot operated relief and reducing product families.
    • Flow Control Cartridges

    • Sun Hydraulics offers 2-, 3- and 4-port flow control cartridges for metering and flow regulation. Sun flow control options include:
      • Electro-proportional throttle valves
      • Needle valves with or without free flow check
      • Fully adjustable needle valves
      • Pressure compensated valves
      • 3- and 4-port priority flow controls
    • Flow Divider Cartridges

    • Sun Hydraulics flow divider and flow divider/combiner cartridges are sliding spool devices that are used to split or combine flow in a variety of applications. Sun flow divider and flow divider/combiner cartridges can be conveniently applied using many mounting options.
      • Offer accurate divisional and combining accuracy in a small size
      • Offer high flow capacity relative to size
      • Are available in a synchronizing version for bi-directional static error correction
      • Operate at pressures up to 5000 psi (350 bar)
    • Load Control, Balanced Cartridges

    • Sun’s load reactive and non-load reactive load control valves complement our existing line of motion control products.
    • Load Control Valve, Load Reactive Cartridges

    • Sun's load reactive, load control cartridges complement other existing motion control products, sharing the same cavities as CB**, CA** and CW** counterbalance valves.
      • Use same cavities as CB**, CA** and CW** counterbalance cartridges
      • Feature low leakage with excellent modulation characteristics
      • Available in adjustable and fixed setting versions
      • Can be installed directly into a cavity machined in an actuator housing
    • Logic Element Cartridges

    • Sun Hydraulics offers a broad variety of balanced and unbalanced logic switching cartridges that can be used for a variety of directional control applications. Logic modulating cartridges for pressure and flow control applications are also offered. Sun logic cartridges can be conveniently applied using many mounting options.
      • Offer machine designers almost unlimited flexibility in logic circuit design
      • Can be remotely piloted using other Sun pilot products
        Includes versions that accept a
      • Sun pilot control directly into the hex end of the logic cartridge for integrated pilot control
      • Includes sealed pilot versions to prevent leakage between pilot and work ports
    • Pilot-to-Open Check Cartridges

    • Sun Hydraulics' pilot-to-open check cartridges are non-modulating, on-off devices used for holding a load or actuator in position. Sun pilot-to-open check cartridges can be directly integrated into your actuator or applied using manifolds with many mounting options.
      • Offer protection against hose breaks
      • Positively lock pressurized loads
      • Are available in non-vented (3-port) and vented (3- and 4-port) versions
      • Are physically interchangeable with counterbalance cartridges (same number of ports, same cavities, same flow path for a given frame size).
    • Pilot Control - directional Cartridges

    • Sun Hydraulics offers many small solenoid and non-solenoid pilot valves that can be used to provide directional pilot control. Pilot controls that feature a T-8A cavity can also be directly installed into the hex end of many of Sun's pilot operated and ventable cartridges to provide integrated pilot control. Pilot offerings include:
      • 2-way and 3-way 5000 psi (350 bar) solenoid cartridges
      • Hydraulically operated 2-positon, 2-way and 2-position, 3-way pilot cartridges
      • Air piloted 2-position, 2-way and 2-position, 3-way pilot controls
      • Manually operated, 2-position, 2-way, intermittent pilot control
    • Pilot Control - flow control

    • Two-port, pilot-stage needle valves are fully adjustable devices used to regulate pilot flow in a main-stage valve or to meter in/out flow in low flow applications. These cartridges are designed for pilot flow applications and utilize Sun's T-8A cavity so they can be used in conjunction with Sun's pilot-operated, main-stage valves.
    • Reducing Cartridges

    • Sun Hydraulics reducing cartridges are available in different versions and can be conveniently applied using many mounting options.
      • Functionally interchangeable with reducing/relieving cartridges (same flow path, same cavity for a given frame size)
      • Five sizes, flow rates up to 80 gpm (320 L/min.)
      • Fully adjustable up to and including 4500 psi (315 bar) with inlet pressures up to 5000 psi (350 bar) (except air piloted versions)
    • Reducing/Relieving Cartridges

    • Sun Hydraulics reducing/relieving cartridges are available in different versions and can be conveniently applied using many mounting options.
      • Functionally interchangeable with one another (same flow path, same cavity for a given frame size)
      • Five sizes, flow rates up to 80 gpm (320 L/min.)
      • Fully adjustable up to and including 4500 psi (315 bar) with inlet pressures up to 5000 psi (350 bar) (except air piloted versions)
      • Reducing/relieving cartridges are offered in both three- and four-port configurations
    • Relief Cartridges

    • Sun Hydraulics offers many different pressure limiting and pressure regulating relief cartridges that can be conveniently applied using many mounting options.
      • Available in 2-, 3- and 4-ports
      • Functionally interchangeable (except pilot only versions) with valves with the same number of ports (same flow path, same cavity for a given frame size)
      • Five sizes, flow rates up to 200 gpm (800 L/min.)
      • Versions are available with an integral pilot control cavity that accepts Sun's T-8A pilot pressure controls - electro-proportional or pneumatic
      • Fully adjustable up to and including 5000 psi (350 bar) (6000 psi (420 bar) intermittent) (except air piloted versions)
    • Relief - After Check Cartridges

    • The relief-after-check cartridge is a hybrid valve incorporating a direct-acting relief tee'd in after a check function. The check valve flow is from the inlet (port 2) to the system port (port1). When the pressure in the system (port 1) reaches the relief valve setting, the valve starts to open to tank (port 3), throttling flow to limit the pressure rise. These valves are smooth and quiet, essentially zero-leak, dirt-tolerant, immune to silting and are very fast.
    • Sequence Cartridges

    • Sun Hydraulics' sequence cartridges are similar to relief cartridges except the pilot is separately drained so that valve setting is not affected by pressure in the outlet port. Sun sequence cartridges can be conveniently applied using many mounting options.
      • Functionally interchangeable with one another (same flow path, same cavity for a given frame size)
      • Offered in five sizes with flow rates up to 120 gpm (480 L/min.)
      • Fully adjustable over a wide range of operating pressures up to and including 5000 psi (350 bar) (6000 psi (420 bar) intermittent) (except air piloted versions)
    • Shuttle Valve Cartridges

    • Sun Hydraulics offers a variety of two-, three- and four-port shuttle cartridges. All shuttle cartridges operate at pressures up to 5000 psi (350 bar).
      • Single ball shuttles with or without an external port in the hex of the cartridge
      • Back-to-back check cartridges with or without an external port in the hex of the cartridge
      • Low side (hot oil) shuttles for hydrostatic transmissions
      • High side blocked center shuttles
      • High side spring offset 2-position, 2-way shuttles
    • Shuttle Valve, Insert Style

    • The single ball shuttle connects the higher of two work ports to the signal or common port. The signal is sensed at port 2.
    • Solenoid Operated Cartridges

    • Sun solenoid cartridge are offered in full flow or pilot flow versions. Full flow versions are available in 2-way, 3-way and 4-way functions and pilot cartridges are available in 2-way and 3-way functions. Full flow cartridge feature industrial grade solenoids and pilot catridge solenoids are rated for high pressure, no leakage operation.
  • Manifolds

  • Sun offers line mount, motor mount, sandwich and subplate manifolds that are all available in a choice of aluminum (3000 psi/210 bar) or ductile iron (5000 psi/350 bar). Port choices include threaded and code 61 and code 62 flanges. In addition to standard manifolds, Sun designs and manufactures custom manifolds for application specific requirements.
    • Line mount Manifolds

    •  Sun offers more than 300 single and multiple cavity standard line mount manifolds that are each available in a choice of aluminum (3000 psi/210 bar) or ductile iron (5000 psi/350 bar). Ports include NPTF, SAE, BSPP and Code 61 and Code 62 flanges.
    • Sandwich Manifolds

    • Sun offers more non-solenoid sandwich functions in interface sizes ISO 02 through ISO 08 than any other manufacturer of sandwich valves. All sandwiches are offered in a choice of aluminum (3000 psi/210 bar) or ductile iron (5000 psi/350 bar). Many unique functions are available to solve tough circuit problems.
    • Subplate Manifolds

    • Sun subplates are available in ISO 03 through ISO 08 interfaces and each is offered in a choice of aluminum (3000 psi/210bar) or ductile iron (5000 psi/210 bar). Subplates are offered with side porting, rear porting or side porting with gasket mount tank ports.
    • Motor mount Manifolds

    • Sun Hydraulics manufactures a broad variety of pressure control, flow control and load control manifolds with mounting configurations that match the bolt patterns on many commercially available hydraulic motors, including, but not limited to: Eaton/Char-Lynn, Danfoss, Staffa, HPI, White, and TRW Ross. All motor mount manifolds are available in a choice of aluminum (3000 psi/210 bar) or ductile iron (5000 psi/350 bar).
  • Standard Valve Packages (YAssemblies)

  • Sun has developed a selection of assemblies incorporating commonly used hydraulic functions. These assemblies typically include two or more different cartridges integrated into a variety of mounting options.
    • Solenoid Operated Assembly Cross Reference

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  • Custom valve packages

  • Sun Hydraulics manufactures custom engineered valve packages or "valvepaks" at all of its locations around the world. Valvepaks are comprised of standard screw-in cartridge valves housed in a custom manifold. Once a customer's hydraulic circuit has been developed, it is incorporated into a single, custom manifold designed to fit into a defined location. Benefits to customers using Sun's valvepak solutions include order simplification, reduced assembly time, and cost, and consolidation of the hydraulic control system.

    All of our facilities use similar processes to design and manufacture custom valvepaks that are backed by Sun's full range of screw-in hydraulic cartridge valves. All manifolds can be manufactured in either T-6061 aluminum (3000 psi/210 bar) or 65-45-12 high-strength ductile iron (5000 psi/350 bar).

    The beauty of Sun's valvepak solutions are that they all use our field proven, standard cartridge valve components with floating construction. Because of the inherent reliability of our cartridge valves, custom valvepaks typically do not require expensive, sophisticated testing once assembled.

  • Amplifiers - Embedded Electronics - and Amplifier Accessories

  • Sun’s innovative valve-mounted digital amplifiers for its range of proportional products are designed for easy assembly and to meet unique customer requirements. Sun’s electro-hydraulic valves with embedded electronics are available in a wide range of control configurations and connector options, and are ideal for both mobile and industrial applications. Sun also offers a plug-in style amplifier. With both these amplifier solutions, valves can be mounted close to actuators for improved performance; system plumbing and wiring are simplified.

    Sun’s amplifier products are easily programmed using a hand held programmer and infrared adapter cable. Parameter settings can be both monitored and adjusted.