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.

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.

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.

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.

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%.

Delaware Manufacturing Industries Corp. (DMIC) manufactures high, medium, and low pressure fluid control valves. The company's ball valves are offered in steel, stainless steel, or aluminum construction, and can be custom-made for OEMs. Their check valves allow for up to 10,000 psi, and come in sizes 0.375" to 2". Finally, the flow controls and needle valves are built with Chromaflow color coding for easy repeatability; they are also available with pressure compensation.

Certified Power carries an array of hydraulic valve options from several large manufacturers. They offer directional control valves by Brand Hydraulics, Cross Manufacturing, Northman Fluid Power, Parker Gersen, Prince Manufacturing, and Yuken, as well as flow control valves by many of the same companies. Needle and check valves by RegO are also available.