Grainger Industrial Supply offers hydraulic manual stack valve systems in inlet section, outlet section, and work section configurations. PRINCE SV125 inlet section valves have an adjustable PSI range from 1500 to 3000, flow rates up to 12 GPM, and a #100 RB (7/8-14) straight thread porting. Additional valve features include: load checks on each section, a modular design, controlling up to 8 functions, machined for cartridge-type relief, etc.

Houston Hydraulic offers YUKEN Modular/Stack valves with directional, pressure, and flow control functions. Valves feature industry standard conformed mountings for applications requiring stacking under a directional valve.

Continental Hydraulics offers modular stack valves. These valves allow pressures to 5000 PSI, flows up to 60 GPM, and temperatures up to 200°F. Additional features include: zinc-plated external parts, 10 micron filtration, a three year warranty, multiple mounting patterns, plumbing elimination, reduced assembly time, etc. Typical applications include: oil fields, heavy construction equipment, off-highway equipment, marine, food processing, machine tools, production/material handling, etc.

Brand Hydraulics offers Series 36 & 38 stack valves. These valves have the following feature options: pressures ranging from 1000 to 2000 PSI, coils ranging from 12 to 24 VDC, coil waterproofing kits, automatic unloading, normally closed/open cartridges, blocked/open spools, etc.

Federal Fluid Power offers Prince Manufacturing stack valve. These valves have the following features: pressures allowances up to 3500 PSI, GPMs up to 20, they have 1 to 10 sections per stack, solenoid operators, flow control/mid-valve inlets, joystick handles, and solenoid operators. They are interchangeable with 12-20 gallon valves, and they have series, tandem, or parallel circuits.

Conant Controls, Inc. offers Multiport stack control valves in 1/8", 1/4", 3/8", and 1/2" NPTF port sizes. These valves have pressure ranges up to 150 PSI, low torques, and up to five separate switching arrangements. These valves are constructed from Teflon, aluminum, brass, and 316 stainless steel materials.

Hydraulic Supply Co. offers Vickers stack valves. Additional valve configurations include: check, flange mount, screw-in cartridge, relief, servo, proportional, and solenoid.

Attica Hydraulic Exchange offers hydraulic valves in the following configurations: stack, check, relief, pressure control, flow control, and directional. They are manufactured by Double-A, Parker, Denison, Bosch/Rexroth/Racine, Eaton, and Vickers.