Pneumadyne specializes in miniature pneumatic products, including an array of control valves. They offer, for example, six different sets of 2- and 3-way valves that support flow rates from 2.1 to 33 scfm at 125 psi. They also manufacture sub-micro valves that support a 2.9 scfm flow rate and can accommodate vacuum applications, as well as standard and shut-off 6-position selector valves that allow the actuation of up to six individual circuits from a common input port. Other valves available from Pneumadyne include 4-way, cartridge, 3-position toggle, shuttle, check, flow control, needle, and bleed.

Proportion-Air manufactures the packaged F-Series FCV, a proportional flow control valve that consists of an electronic pneumatic positioner, a pneumatic valve actuator, an LVDT position sensor to continuously monitor valve position, an angle seat valve, and a parabolic shaped linear valve trim. These valves fit pipe sizes from 0.25" to 1.5", and permit flow ranges from as low as 1-20 scfh to 25-250 scfm. The company's basic flow control valve allows a maximum Cv of 19, as well as an integral closed-loop position with +/-0.3% F.S. resolution; analog outputs of 0-10 Vdc and 4-20 mA are available.

ARO Fluid Products provides a full line of pneumatic valves in multiple configurations: 2-, 3-, and 4-way, with electric, manual, mechanical, and pneumatic actuators, and miniature to full sizes. The 50/E/K/H Series, for example, offers body ported 3- or 4-way manual, mechanical, solenoid, or pilot valves to support flows of 16-280 scfm.  Similarly, the Alpha and MaxAir Series offer a number of combinations to accommodate customer needs. The company also provides specialty valves such as breather vents, mufflers, speed controls, shuttle valves, and quick exhaust, as well as circuitry and limit valves with flow ranges from 3.4 to 9 scfm.

AutomationStore.com sells several types of pneumatic equipment. Pneumatic valves are supplied by AirTAC, and include solenoid-operated line-mounted valves, air pilot-operated valves, and manually-operated valves. Also available are Apollo/Conbraco ball valves and stainless steel ball valves (female NPT); inline, 90-degree threaded, and 90-degree push connect style flow controls in nickel-plated brass or anondized aluminum; and polyurethane diaphragm quick exhaust valves.

Deltech Controls offers a variety of pneumatic butterfly valves and ball valves. The butterfly valves come in two types: basic (2" to 24" diameter, in wafer or lug body) and large diameter (26" to 40" or 80", in wafer body centric disc, flanged body centric disc, or flanged body double centric disc). Likewise, the ball valves come in two types: floating (0.5" to 12" diameter, 2-piece design, full or reduced bore) or trunnion mounted (2" to 24", 2- or 3-piece design). The company also sells solenoid valves in 4-7 mm orifice sizes, and 3-way, 5-way, or convertible type. Related products include actuators, operators, and limit switch boxes.

Gemini Valve manufactures numerous pneumatic valves in a variety of sizes and configurations. The 76, 86, and 96 Series, for general industrial use, come in 0.25" to 2" diameter sizes and support a 720 psi cold working pressure (C.W.P.). Meanwhile, the 82 Series tube compression valves offer an alternative to high pressure models for applications which require 1,000 psi or less. Finally, with 300# class flanges, the full port steel Series 98 wafer ball valves are rated to 720 psi at 100 degrees Fahrenheit or 300 psi at 321 degrees; with 150# flanges, they are rated to 275 psi at 100 degrees and 200 psi at 365 degrees.

Lexair manufactures a variety of poppet-style valves that support 500 psi working pressures standard, with higher pressure ratings available upon request. They also make Mini 1 pneumatic valves for high-flow directional control, with manual, mechanical, air pilot, and solenoid operators. Construction materials include aluminum bodies, stainless steel spools, and Buna-N seals; working pressures are rated 150 psi standard. The Hi-Cyclic directional control valves can also support pneumatic applications at 250 psi, are configurable to multiple spools, and like the Mini 1, come with a choice of four different operators.

MAC Valves offers a full line of pneumatic valves that come in three families. Miniature valves are solenoid operated with flow Cv ratings of 0.06 to 0.12 for 3-way, and 0.035 to 0.1 for 4-way. Small 3-way solenoid operated valves come in 15 sizes and provide Cvs of 0.06 to 1.2, while large 2-way valves come in 9 sizes with a Cv range of 1.5 to 60.0. Finally, the small 4-way valves start with Cv of 0.035 and end at 1.2, while the large 4-way valves range from 1.2 to 15.9.

Mead offers a wide selection of pneumatic valves under the Isonic product line, designed for its patented half shell manifold design that allows flow channels and internal component compartments to be placed directly into its molded body sections. The poppet-style Isonic V2000 valve, with Viton and Nitrile seals, is temperature rated from 0 to 120 degrees Fahrenheit and up to 120 psi, depending on orifice size. The Isonic V1 2- and 3-way valves, likewise, come in many configurations; variables include orifice size, flow pattern (normally closed or vacuum), LED, connector, and solenoid. Isonic V4 4-way valves, as well as several other pneumatic valve models, are also available to customers.

Norgren manufactures an assortment of valves for use in any application, from poppet valves to inline valves. The Prospector Series poppet valves are available in four sizes and provide Cv from 1.2 to 49.5 and support operating pressures up to 150 psig, while the Super X spool valves offer Cv from 0.34 to 9.8 and operating pressures up to 145 psig. Other selections include the Nugget 200 spool valves, V50 Series inline valves, and V60-V62 Series directional control valves.

Numatics manufactures several types of pneumatic valves for different applications and levels of performance. Directional control valves come either in Standard Series or 2000 Series; both allow for different port sizes and Cv flow capacities, while the 2000 Series offers advanced circuit board technology and is Fieldbus Electronics capable. The company also makes ISO valves to adhere to ISO specifications, inline- and manifold-mounted valves featuring DIN plug-in solenoids with indicator lights, and poppet valves ideal for use with single acting cylinders, air bellows, and vacuum material handling applications.

South Bend Controls custom-designs and manufactures pneumatic valves and accessories for customer-specific applications. They produce 2- and 3-way valves for pressures from 50 to 6,000 psi, such as aircraft, undersea, and industrial applications; these can be designed in several ways, such as poppet, manifold, coaxial, etc. The company also makes special valves, such as its high temperature pneumatic solenoid valve, pilot-operated anti-ice solenoid valve, and squib-actuated valves, for fast emergency flow of pneumatic gases (<5 ms).

Versa Products manufactures a line of air control valves for process control, robotic, packaging, and similar applications. These directional control valves use a patented anti-extrusion arrangement of O-ring seals to offer leak-proof valves, and are made from brass, aluminum, stainless steel, and other materials. The company's V/T and V-316 valves can handle any air power task from vacuum to 200 psi, and offer features such as lockout, latching manual reset, and redundant coils. Body-ported options like the C5 and C7 provide flow ratings of 0.197 to 0.75 and 0.276 to 1.6, respectively, while the Series B316 are appropriate as reset and relay valves for emergency shutdown panels.

Unique Welding & Fabricating manufactures 3", 4", and 6" pneumatic emergency valves to avoid production slowdowns, operator injury, and environmental cleanup by stopping chemical leaks immediately. Their 6" diameter Hot Head Series valves are designed for high temperature situations.

ASCO Valve makes a complete line of 2-, 3-, and 4-way air piloted and solenoid operated directional control valves from sizes 10-32 to 1" and flows from 0.02 Cv through 7.0 Cv. The pneumatic control valves are appropriate for applications such as medical, motion control, and robotics, and come as 3- and 4-way poppet, 5 port, and 2- and 3-way position spool valves, up to a pressure of 150 psi. The air-assisted solenoid valves have flow capabilities from 0.001 Cv through 12.5 Cv. The company also manufactures direct acting solenoid valves and the SENTRONIC valve, an electropneumatic pressure-regulating valve with a pressure range from vacuum to 725 psi, hysteresis of 0.5%, repeatability of 0.5%, and linearity of 0.5%.