Applied Industrial Technologies offers an array of hydraulic valves and related accessories, including cartridge valves, directional control valves, flow/motion control valves, hydraulic ball valves, pressure control valves, proportional directional valves, and SystemStak valves. Some of the in-line/body ported directional control options are buildable sectional valves, log splitter valves, and Monoblock valves. Hydraulic ball valves are available in a variety of configurations, with connections types such as BSPP and Code-614 bolt flange, materials such as brass, steel, and stainless steel, and several installed options like one-way or two-way, with or without lock, or flat, non-offset handle. Meanwhile, the SystemStak valves are available for pressure control, flow control, and checks. In total, the company offers some 18,000 hydraulic valves and accessories.

Continental Hydraulics manufactures hydraulic proportional control, modular stack and directional control valves. The hydraulic proportional control valves follow standard NFPA-ISO mounting patterns, and offer five pressure output control ranges, from 0 to 4,500 psi, making them compatible with many material handling and machine tool systems.

Grainger distributes a variety of hydraulic valves, such as relief, pressure contro and split flow valves. Hydraulic valve models include the Prince RD1850H, with a max flow 16 GPM and pressure range of 1,000 to 2,500 psi, and the Vickers CS-03-B50, with a max flow of 45 GPM and pressure range of 125 to 1,000.

HydraForce offers hydraulic cartridge valves and electro-hydraulic control systems. Solenoid on/off valves come in a variety of configurations (from 2-way up to 6-way, poppet-type or spool-type, etc.), as do the directional valves, which include guided check valves, load shuttle valves, and piloted 2-, 3-, and 4-way spool valves.

Sun Hydraulics has developed several standard valve packages, including a line mount, sandwich, and Solenoid operated assembly cross references, and is also capable of custom-engineering valve packages calls "valvepaks." The valvepaks are backed by Sun's screw-in hydraulic cartridge valves, and their manifolds are manufactured in either T-6061 aluminum (3,000 psi) or 65-45-12 ductile iron (5,000 psi); they can also accommodate up to 30+ individual cartridge valves. These screw-in cartridge valves are a trademark of the company; they are available in up to five sizes/capacities, and can handle flows up to 400 gallons per minute and pressures up to 5,000 psi.

Eaton Hydraulics provides a range of hydraulic valves, including direct operated Vickers inline, right angle, and manifold mounted check valves for one-way flow in hydraulic circuits, and flow control valves that cause variable pressure drops in fluid passages in order to reduce flow. They also have recently added Vickers KB Proportional Directional Valves, which are IP65 and 67 rated, and tolerate pressures up to 5,000 psi and flows up to 185 US GPM. Other valve choices include directional, flange, pressure control, proportional flow, and proportional pressure valves.

Parker Hannifin manufactures hydraulic valves in three families: electrohydraulic valves, industrial valves, and mobile valves. The first family includes proportional directional control valves, proportional pressure valves, servovalves, and other electrohydraulic accessories. The industrial valve family includes ball, check, and needle valves, in addition to directional control, flow control, pressure control, and proportional valves. Available mobile valves are ball valves, check valves, directional control valves, needle valves, pressure control valves, proportional valves, and lanyard valves.

Westfield Hydraulics develops, engineers, and produces many electro-mechanical devices and fluid power assemblies. Among their offerings are thrust reverser valves, steering valves, hydraulic Solenoid valves, multi-position hydraulic Solenoid valves, and check valves. The company can also manufacture customer-designed valves and related products.

Atos Electrohydraulics offers both proportional valves and cartridge valves. The proportional pressure valves are suited to support max flows as low as 4 L/min, and as high as 600. The proportional directional valves come standard direct operated, but also can include one or two position transducers. The proportional cartridges, meanwhile, are designed for compensation, relief, or reducing. Finally, there are six cartridge valve options that can provide pressure, flow, or directional control, or on-off active safety functionality.

HYDAC's lineup of hydraulic valves begins with its high pressure ball valve rated up to 5,800 psi, which comes either standard or split flange direct mount; a low pressure stainless steel ball valve is also available for pressures up to 2,000 psi. In addition, the company manufactures eight models of flow control valves, which each have a phosphate coated steel valve body, an FPM seal, and a slotted control spindle design, on top of individual features such as pressure compensation. Other valves available are hose break valves, shuttle valves, and cartridge valves.

Moog offers several types of valves. Its electrohydraulic servovalves and servo-proportional valves are meant for continuous use in both industrial and aerospace applications. The company's cartridge valves, known as slip-in logic elements, are used for directional, pressure, check, and flow control, while its servocartridge valves provide directional flow control using integrated Electric Feedback Control (EFB).

Oilgear offers a full range of standard and special function valves, as well as custom-design flexibility. Sizes range from 0.25" to 38", while maximum pressure is 60,000 psi and flow, 26,420 GPM. A number of mounting options are available, as well: manifold, sub-plate, flange, and pipe.

STAUFF manufactures several types of hydraulic valves. The in-line mounted throttle and flow control valves are made in DV, which provides fluid control and/or shut-off in both directions, and DRV, which shuts off in one direction and allows free flow in the reverse direction; the manifold mounted throttle and flow control valves have the same options in their two models, DVP and DRVP. In addition, throttle valves (cartridge assembly), check valves (in-line mounting), and gauge isolator valves, which protect against gauge overload, are also available.

Advanced Fluid Systems carries a variety of valves, such as accumulator control valves by Bosch-Rexroth and Sun Hydraulics, ball valves by DMIC, STAUFF, and Vescor, and check valves by ATOS, Dension Hydraulics, and Snap-tite. Other valve categories offered are directional control, flow control, flow dividers/combiners, and pressure control valves.

Gulf Controls Company is an authorized distributor of hydraulic valves and other motion control products. They stock directional control, flow control, pressure control, cartridge, and other valves made by an array of manufacruters, including Bosch Rexroth, Bucher, Hydac, Hydraforce, Parker, Prince, and Sun Hydraulics.