Flow Control, Check, and Lockout Valves Catalog

In-Line Mounted Flow Control Valves

The in-line mounted flow control valves featured in this catalog allow free flow of air in one direction while providing adjustable, metered flow in the opposite direction. These valves are piped between the directional control valve and the cylinder, giving operators precise control over actuator speed. Key design features include high flow capacity with accurate adjustment, a tamper-proof locking screw as standard, and a self-cleansing poppet that eliminates sediment accumulation.

Automatic Valve offers flow control valves across multiple series to accommodate a wide range of port sizes and flow requirements. The MS2 series handles 1/4-inch ports with flow ratings up to 1,614 l/min (Cv 1.6). The MS3 series covers 3/8-inch and 1/2-inch ports with flow up to 2,460 l/min (Cv 2.5). The MS7 series supports 3/4-inch and 1-inch ports with Cv ratings up to 5.0, while the MS8 series spans 1-inch through 1-1/2-inch ports with flow capacities reaching 21,648 l/min (Cv 22). Detailed dimensional drawings and weight data for each model are included in the catalog.

Model Numbers and Series for Flow Control Valves

The catalog lists specific model numbers for each flow control valve. The 200A-2 (1/4-inch) and 200A-3 (3/8-inch) are part of the smaller MS2 and MS3 series. The 200C-7 and 200C-71 serve 3/4-inch and 1-inch ports in the MS7 series. For higher flow requirements, the 200A-10, 200A-12, and 200A-15 in the MS8 series accommodate 1-inch, 1-1/4-inch, and 1-1/2-inch ports respectively. Each model includes complete dimensional information with measurements labeled A, B, and C for straightforward integration into piping layouts.

In-Line Mounted Check Valves

Automatic Valve's in-line mounted check valves provide low cracking pressure and full-area free flow in one direction with instantaneous shut-off in the reverse direction. Like the flow control valves, these check valves feature a self-cleansing poppet that prevents sediment buildup, ensuring reliable long-term performance in compressed air systems.

The check valve lineup is organized into the MC3, MC7, and MC8 series. The MC3 series covers 1/4-inch, 3/8-inch, and 1/2-inch port sizes with models 203A-2, 203A-3, and 203A-35 offering flow rates from 1,574 to 1,968 l/min with cracking pressures as low as 0.02 BAR (0.50 PSIG). The MC7 series includes the 203A-7 and 203A-71 for 3/4-inch and 1-inch ports with flow up to 5,900 l/min and cracking pressures of 0.46 BAR (6.75 PSIG). The MC8 series serves 1-inch through 1-1/2-inch ports with models 203A-10, 203A-12, and 203A-15 delivering up to 18,700 l/min of flow capacity.

Quick Exhaust, Check, and Shuttle Valves

A standout feature of this accessories catalog is Automatic Valve's versatile quick exhaust, check, and shuttle valve family. A single valve model performs all three functions simply by changing the port configuration. This design versatility simplifies inventory management and streamlines pneumatic circuit design.

In the quick exhaust configuration, when the IN port is pressurized, flow passes from IN to OUT while the EXH port is blocked. When the OUT port is pressurized, flow exhausts from OUT to EXH while IN is blocked. In check valve mode (with EXH plugged), free flow passes from IN to OUT with no reverse flow. In shuttle valve mode, the valve passes air from whichever input port is pressurized to the OUT port while blocking the other input.

The MQ2 series (models 370A-21 and 370A-22) handles 1/8-inch and 1/4-inch IN/OUT ports with 1/4-inch EXH, providing flows of 790 to 890 l/min. The MQ3 series (370A-32 and 370A-33) accommodates 1/4-inch and 3/8-inch ports with flows up to 2,160 l/min. The MQ7 series (370A-75 and 370A-77) supports 1/2-inch and 3/4-inch ports with flow up to 2,850 l/min (Cv 4.1). All models operate within a pressure range of 0.1 to 10.7 BAR (1 to 150 PSIG), and the catalog emphasizes their rugged internal construction for outstanding durability.

Lockout Valves for Energy Isolation

The lockout valves in this catalog are 3-way, 2-position devices designed for energy isolation in pneumatic systems. They feature a short stroke for quick response, a padlockable handle that can only be locked in the closed position, and a bright red handle for high visibility on the factory floor.

When the handle is pulled outward, Inlet Port 1 connects to Outlet Port 2 while Exhaust Port 3 is blocked. When pushed inward, Inlet Port 1 is blocked and Outlet Port 2 vents through Exhaust Port 3. Automatic Valve explicitly notes that these products are defined as energy isolation devices and are NOT emergency stop devices, an important distinction for safety compliance.

The N06 series includes models N0604HALM (3/8-inch), N0605HALM (1/2-inch), and N0606HALM (3/4-inch) with aluminum bodies and NBR seals, offering flow capacities from 4,630 to 8,170 l/min. The N16 series provides larger capacity with models N1606HALM (3/4-inch), N1607HALM (1-inch), and N1608HALM (1-1/4-inch), reaching up to 19,011 l/min (Cv 19.3). A soft start option is available by adding -SS (or -EZ) to the end of the part number, enabling gradual pressure buildup for safer system start-up.

Soft Start Feature for Lockout Valves

The soft start option allows the lockout valve to gradually ramp up downstream pressure when the system is energized, rather than delivering full line pressure instantaneously. This feature protects downstream components, reduces the risk of sudden actuator movement, and improves operator safety during system start-up. To order a lockout valve with soft start, simply add the -SS suffix to the end of the standard model number. The soft start version operates within a pressure range of 310 kPa to 1,035 kPa (45 to 150 PSIG).

Exhaust Mufflers and Sintered Silencers

This catalog details three categories of exhaust noise reduction accessories: standard exhaust mufflers (84C series), sintered exhaust mufflers (84D series), and exhaust restrictor/sintered mufflers (266B series).

The 84C series exhaust mufflers reduce exhaust noise while maintaining full-volume airflow with minimum back pressure. They thread directly into the exhaust port and are available in sizes from 1/8-inch to 1-1/2-inch NPT, with flow ratings ranging from 1,160 l/min (Cv 1.3) to 34,870 l/min (Cv 39.0).

The 84D sintered silencers use sintered bronze bonded to a copper-plated male pipe fitting for effective noise reduction. They feature corrosion resistance and a cleanable 40-micron filter element. Available from 10-32 thread up to 1-inch NPT, they provide flow rates from 150 l/min to 4,360 l/min.

The 266B exhaust restrictor/sintered mufflers combine noise reduction with adjustable exhaust airflow, allowing operators to accurately control cylinder speeds. They also feature corrosion-resistant construction and a cleanable 40-micron filter element, with sizes from 1/8-inch to 1-inch NPT and flow capacities from 1,070 to 6,080 l/min.

Pneumatic Accessories: Right-Angle Flow Controls, Port-Mounted Regulators, and Pilot-Operated Check Valves

The catalog also covers several specialized pneumatic accessories for advanced circuit requirements. All accessories in this section share common specifications: they work with compressed air or inert gas (lubricated or non-lubricated), use NBR seals, have stainless steel springs and bodies, and operate within a pressure range of 100 kPa to 1,035 kPa (15 to 150 PSIG) with a temperature range of -7 degrees Celsius to 65 degrees Celsius (20 to 150 degrees Fahrenheit).

Right-Angle Flow (RAF) Controls

Right-angle flow controls eliminate at least one fitting in the pneumatic circuit by providing efficient control of airflow at the source. Once cylinder speed is set, the control locks in place to maintain consistent performance. The catalog lists models A7209-100 (1/4-inch NPT, 12.02 SCFM) and A7209-101 (3/8-inch NPT, 34.52 SCFM), along with BSPP and tube fitting variants for international applications.

Port-Mounted Regulators (PMR)

Port-mounted regulators deliver regulated flow with self-relieving capability and incorporate a by-pass check valve. They provide proven payback through point-of-use air consumption reductions. Operating at primary pressures from 1 to 16 BAR (15 to 235 PSIG), models are available in 1/4-inch and 3/8-inch NPT as well as BSPP and tube fitting options.

Pilot-Operated Check (POC) Valves

Pilot-operated check valves stop flow on loss of air pressure, providing a critical safety function in pneumatic circuits. They eliminate at least one fitting and operate within a pressure range of 1 to 10 BAR (15 to 150 PSIG). Models include the A7209-120 (1/4-inch NPT) and A7209-121 (3/8-inch NPT) with SCFM ratings of up to 41.25 from Port 1 to Port 2 and 40.81 from Port 2 to Port 1 at 90 and 0 PSIG respectively.

Frequently Asked Questions

What types of accessories are included in the Automatic Valve Accessories catalog?

The Automatic Valve Accessories catalog covers in-line mounted flow control valves, in-line mounted check valves, quick exhaust valves, check valves, shuttle valves, lockout valves, exhaust mufflers, sintered silencers, exhaust restrictor mufflers, right-angle flow controls, port-mounted regulators, and pilot-operated check valves. Each product section includes model numbers, port sizes, flow capacities, weights, and dimensional information.

What port sizes are available for Automatic Valve flow control valves?

Automatic Valve in-line mounted flow control valves are available in port sizes ranging from 1/4-inch to 1-1/2-inch NPT. The MS2 series covers 1/4-inch, the MS3 series covers 3/8-inch and 1/2-inch, the MS7 series covers 3/4-inch and 1-inch, and the MS8 series covers 1-inch through 1-1/2-inch ports, with Cv ratings from 1.6 up to 22.

How do Automatic Valve lockout valves support LOTO (Lockout/Tagout) compliance?

Automatic Valve lockout valves are 3-way, 2-position energy isolation devices that are padlockable only in the closed position. They feature a bright red handle for visibility and short stroke for quick response. These valves are classified as energy isolation devices per OSHA standards and support lockout/tagout procedures. A soft start option is available for gradual pressure buildup during system re-energization.

Can a single Automatic Valve model function as a quick exhaust, check, and shuttle valve?

Yes. Automatic Valve's 370A series is designed so that one valve body can perform all three functions depending on how the ports are configured. With EXH open, it acts as a quick exhaust valve. With EXH plugged, it functions as a check valve. When both IN and EXH are used as inputs, it operates as a shuttle valve. This versatility reduces inventory needs and simplifies system design.

What is the difference between the 84C, 84D, and 266B exhaust muffler series?

The 84C series are standard exhaust mufflers that reduce noise while maintaining full airflow with minimal back pressure. The 84D series are sintered bronze mufflers with a 40-micron cleanable filter element and corrosion resistance. The 266B series are exhaust restrictor silencers that combine noise reduction with adjustable exhaust flow for precise cylinder speed control, and also include a 40-micron cleanable filter element.