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.

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.

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.

Brand Hydraulics offers a variety of hydraulic valves, including 4-way directional control valves with a hydraulic kick out, mono-block directional control valves with an auto-cycle hydraulic kick out, and adjustable hydraulic relief valves.

Bucher has a wide array of hydraulic valves.Types include safety relief, flow preventing, directional spool, and direction seat hydraulic valves.

Motion Industries supplies a variety of hydraulic valves, including cartridge valves, check valves, directional control valves, flow control valves, needle valves, pressure control valves, and proportional valves. The company sells 319 unique check valves, either line mounted or manifold mounted, and manufactured by Hydac, Vickers, and others. The selection is even greater for directional control valves, which are either manual or Solenoid operated, as well as for the flow control valves, most of which are line mounted. In addition, needle valves by Hydac and manually-adjustable pressure control valves by Vickers are available, either manifold mounted or line mounted.

Innovative Pressure Technologies specializes in high pressure hydraulic valves. Their ball valves are rated from 10,000 to 20,000 psi, while their coned and threaded valves (i.e., needle and check valves) can withstand 20,000 to 60,000 psi. The company's floating ball valves come as standard or Trunion, both of which accommodate port sizes 0.1875" to 0.5" and three mounting options. The needle valves, which are used in instrument isolation, venting, and hydraulic applications, come in six body styles and can be manufactured to meet NACE MR-01-75 and American Petroleum Institute standards. Lastly, the check valves are made in two styles: ball seat poppet (metal-to-metal seat) or soft seat poppet (O-ring seal made of nitrile or other materials); they are appropriate for fluid handling and research.

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.

Cross Manufacturing produces several hydraulic valves. Relief valves come in Model RC (a dual relief, differential poppet style for cylinders or motors, that handles up to 3,000 psi and 30 GPM), Model RD (hydraulically dampened differential poppet-style, 3,000 psi, 30 GPM), and Model RV (pilot operated, up to 3,000 psi and 40 GPM). There are five models of directional control valves, including the Model SS (up to 3,000 psi and 9 GPM), Model AD (3,000 psi, 15 GPM), and Model BA (1 to 3 spool valve, up to 2,500 psi and 30 GPM). The company also manufactures six selector valves, which can support between 3,000 and 5,000 psi and 20 to 50 GPM.

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.

Prince Manufacturing specializes in the production of hydraulic equipment, including stack valves, mono-block valves, loader valves, relief valves, and flow control valves. Within their three models of stack valves, they can handle up to either 12 or 20 GPM, and 3,000 or 3,500 psi. The company offers over a half-dozen mono-block directional control valve models; the DS Double Selector Valve, for example, has a knob or lever handle and is rated to 40 GPM and 2,500 psi. The three types of loader valves come two spool, with a standard fourth position float and fourth position regen; they each handle 3,000 psi and between 10 and 14 GPM.  Prince also manufactures three models of relief valves and nine models of flow control valves.

Vescor offers both ball valves and needle valves. The ball valves come medium/heavy duty, 3-way high pressure (up to 4,600 psi), and 3-way high pressure (up to 6,000 psi) with split flange. The Mini Line Series needle valve is appropriate for use with oil, water, and most chemicals in test bench and control panel environments, while the 2000 Series is ideal for applications that require fine metering and shut-off. Lastly, the Tru Micro TMF Series with Color Bands provides metered flow in one direction and free flow in reverse direction, with re-set repeatability within 1%.

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.

Snap-tite manufactures a variety of hydraulic valves, including flow control valves, directional control valves, relief valves, and others. Flow control options start with the FRIA Series adjustable inline valve, which is pressure compensated, works up to 5,000 psi, and has adjustable flows to 30 US gpm; the other is the FRI Series, which is different only in that it is a fixed inline valve. Directional control valves include the Marstan, for low flow/high pressure applications (flow rates up to 4 US gpm, pressures up to 10,000 psi), and the Direc-Trol, a high flow, rotary-style valve for flow rates up to 83 US gpm and pressures up to 5,000 psi. The company also offers three relief valves: the RDV for single differential relief, the MDD for dual differential relief, and the MCD for dual relief with make-up checks.