Grainger offers hydraulic valves in the following configurations: standard, pilot-to-open check, manifold, control, and cartridge. Model CS-03-F50 Eaton relief valves feature a cast iron construction, a two-stage design, port sizes ranging from 7/8 to 14, and lengths up to 5.6". These pumps can handle pressures ranging from 1500 to 3000 PSI and flows up to 45 GPM.

Continental Hydraulics manufactures hydraulic proportional, modular stack, and directional control valves. Modular stack valves can handle temperatures up to 200°F, pressures up to 5000 PSI, and flows up to 60 GPM. These pumps feature zinc-plated external parts, reduced system space, 10 micron filtrations, and industry common cavities. Applications include farm equipment, oil fields, heavy construction equipment, off-highway equipment, marine, food processing, machine tools, etc.

HydraForce offers solenoid on/off, pressure control, flow control, electro-proportional, and directional valves. Model SV07-34 3-way valves feature hardened precision spools, continuous-duty rated coils, voltage interchangeable cartridges, and a compact/molded coil design. These valves can handle temperatures ranging from -40 to 400°F, flows up to 3.5 GPM, operating pressures up to 3000 PSI, and 41 cc/minute internal leakage ratings.

Brand Hydraulics offers RL adjustable hydraulic relief, LS 4-way directional control, and LA mono-block directional control valves. RL adjustable hydraulic relief valves can handle pressures ranging from 150 to 3000 PSI, and they are constructed from the following materials: aluminum alloy, hardened alloy steel, chrome alloy steel, and zinc plated steel.

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.

Bucher offers safety relief, flow-preventing, directional spool, and directional seat valves. BBV Series leake-free brake valves can handle operating pressures up to 600 Bar, nominal flows up to 50 l/min, and process connections up to 6000 PSI. These valves feature matched pilot pressures, leak-free valve seats, and pre-opening load controls. They have applications for presses, winch drives, stabilizer cylinders, and boom systems.

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 offers cartridge and manifold hydraulic valves in a variety of configurations, including sequence, relief, reducing, pilot control, flow divider, directional, subplate, sandwich, line mount, motor mount, etc. Relief cartridges feature 2-4 ports, five size configurations, functional interchangeability, and a variety of mounting options. These cartridges can handle pressures up to 6000 PSI and flow rates up to 200 GPM.

Cross Manufacturing produces valves in a variety of configurations, including relief, directional control, selector, SQV, etc. Model RC relief valves feature ductile iron bodies an adjustable/non-adjustable construction, a differential poppet style, and an equal displacement design. These valves can handle capacities up to 30 GPM and pressure ratings ranging from 500 to 3000 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.

Prince Manufacturing specializes in the production of hydraulic equipment, including stack valves, mono-block valves, loader valves, relief valves, and flow control valves. Stack valves can handle capacities ranging from 12 to 20 GPM and pressures up to 3,500 PSI. Loader valves come two spool configurations, with a standard fourth position float and a fourth position regen. These valves feature pressure ratings up to 3,000 PSI and capacities ranging from 10 to 14 GPM.

Vescor offers both ball valves and needle valves. Series BVM/BVH medium/heavy duty valves feature steel zinc stems, chrome plated steel balls, Viton/buna seals, and petroleum-based fluid compatibility. These valves come in NPT port sizes ranging from 1/4" to 2", pressure ratings ranging from 5000 to 7250 PSI, and operating temperatures ranging from -22 to +212°F.

Westfield Hydraulics develops, engineers, and produces electro-mechanical devices and fluid power assemblies. Product offerings include reverser valves, steering valves, hydraulic solenoid valves, multi-position hydraulic Solenoid valves, and check valves. Westfield Hydraulics also manufactures customer-designed valves and related products.

Snap-tite offers FRIA Series adjustable inline and FRI Series fixed inline flow control valves. FRIA Series adjustable flow control valves come in sizes ranging from 1/4" to 1", stainless steel adjustment assemblies, a zinc yellow/dichromate-plated steel construction, and a pressure compensated design. These valves can handle flows up to 30 GPM, working pressures up to 5,000 PSI, and +/-10% tolerances.