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Tamper-Resistant Compressed Air Regulators
Prevent unauthorized or accidental pressure changes to these regulators—they let you lock down the set pressure. Use these regulators to adjust and maintain the pressure of your compressed air. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install them in your air line after your filters.
Regulators with a key lock only let those with the key adjust the pressure. The lock is universal, so you can use the same key for multiple regulators.
Regulators with a removable T-handle can only be adjusted when the handle is in place. Remove the T-handle to prevent further adjustments.
Regulators with a knob-locking clip cannot be adjusted when the clip is installed between the knob and the body of the regulator. To adjust the pressure, remove the knob and clip, then reattach the knob.
Optional pressure gauges (sold separately) are for use with removable T-handle regulators.
Mounting brackets (sold separately) attach the regulator to a wall or equipment.
Regulators | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Overall | Mounting Brackets | ||||||||||||||
Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Gauge Included | No. of Gauge Ports | Wd. | Ht. | Housing Material | Max. Temp., °F | Includes | Regulating Accuracy | Choose a Pressure Regulating Range, psi | Each | Each | ||
With Key Lock | ||||||||||||||||
NPT Female Inlet and Outlet | ||||||||||||||||
| 1/8 | 1/8 | 28 scfm @ 145 psi | 232 | Yes | __ | 3 1/8" | 4 13/16" | Aluminum | 120° | Mounting Bracket | ±5 psi | 00000000 | 0000000 | 000000 | 00 | |
| 1/4 | 1/4 | 72 scfm @ 145 psi | 232 | Yes | __ | 3 1/8" | 4 13/16" | Aluminum | 120° | Mounting Bracket | ±5 psi | 00000000 | 000000 | 000000 | 00 | |
| 3/8 | 3/8 | 228 scfm @ 145 psi | 232 | Yes | __ | 3 7/16" | 5 11/16" | Aluminum | 120° | Mounting Bracket | ±5 psi | 00000000 | 000000 | 000000 | 00 | |
| 1/2 | 1/2 | 245 scfm @ 145 psi | 232 | Yes | __ | 3 7/16" | 5 11/16" | Aluminum | 120° | Mounting Bracket | ±5 psi | 00000000 | 000000 | 000000 | 00 | |
| 3/4 | 3/4 | 353 scfm @ 145 psi | 290 | Yes | __ | 3 7/8" | 7 9/16" | Aluminum | 120° | Mounting Bracket | ±5 psi | 00000000 | 000000 | 000000 | 00 | |
| 1 | 1 | 406 scfm @ 145 psi | 290 | Yes | __ | 3 7/8" | 7 9/16" | Aluminum | 120° | Mounting Bracket | ±5 psi | 00000000 | 000000 | 000000 | 00 | |
With Removable T-Handle | ||||||||||||||||
NPT Female Inlet and Outlet | ||||||||||||||||
| 1/4 | 1/4 | 37 scfm @ 100 psi | 250 | No | 2 | 3" | 5 1/2" | Aluminum | 250° | __ | ±5% | 000000 | 00000 | 0000000 | 000000 | |
| 3/8 | 3/8 | 37 scfm @ 100 psi | 250 | No | 2 | 3" | 5 1/2" | Aluminum | 250° | __ | ±5% | 000000 | 00000 | 0000000 | 00000 | |
| 1/2 | 1/2 | 60 scfm @ 100 psi | 250 | No | 2 | 3 5/8" | 6 3/4" | Aluminum | 250° | __ | ±5% | 000000 | 00000 | 0000000 | 00000 | |
| 3/4 | 3/4 | 120 scfm @ 100 psi | 250 | No | 2 | 4 3/4" | 8 3/8" | Aluminum | 250° | __ | ±5% | 000000 | 000000 | 0000000 | 00000 | |
| 1 | 1 | 120 scfm @ 100 psi | 250 | No | 2 | 4 3/4" | 8 3/8" | Aluminum | 250° | __ | ±5% | 000000 | 000000 | 0000000 | 00000 | |
With Knob-Locking Clip | ||||||||||||||||
NPT Female Inlet and Outlet | ||||||||||||||||
| 1/8 | 1/8 | 45 scfm @ 100 psi | 250 | Yes | __ | 1 5/8" | 3 5/8" | Aluminum | 140° | __ | Not Rated | 0-140 | 0000000 | 00000 | 0000000 | 00000 |
| 1/4 | 1/4 | 59 scfm @ 100 psi | 250 | Yes | __ | 1 5/8" | 3 5/8" | Aluminum | 140° | __ | Not Rated | 0-140 | 0000000 | 00000 | 0000000 | 00000 |
| 1/4 | 1/4 | 86 scfm @ 100 psi | 250 | Yes | __ | 2 1/4" | 4 7/8" | Aluminum | 140° | __ | ±2% | 0-140 | 0000000 | 00000 | 0000000 | 00000 |
| 3/8 | 3/8 | 179 scfm @ 100 psi | 250 | Yes | __ | 2 7/8" | 5 1/2" | Aluminum | 140° | __ | ±2% | 0-140 | 0000000 | 000000 | 0000000 | 00000 |
| 1/2 | 1/2 | 210 scfm @ 100 psi | 250 | Yes | __ | 2 7/8" | 5 1/2" | Aluminum | 140° | __ | ±2% | 0-140 | 0000000 | 000000 | 0000000 | 00000 |
| 3/4 | 3/4 | 290 scfm @ 100 psi | 250 | Yes | __ | 3 5/8" | 7 1/4" | Aluminum | 140° | __ | ±2% | 0-140 | 0000000 | 000000 | 0000000 | 00000 |
| 1 | 1 | 290 scfm @ 100 psi | 250 | Yes | __ | 3 5/8" | 7 1/4" | Aluminum | 140° | __ | ±2% | 0-140 | 0000000 | 000000 | 0000000 | 00000 |
| Replacement Pressure Gauge for Key Lock Regulators | 0000000 | Each | 000000 |
| Optional Gauge for Removable T-Handle Regulators with 0-50 psi Pressure Regulating Range | 0000000 | Each | 00000 |
| Optional Gauge for Removable T-Handle Regulators with 0-125 psi Pressure Regulating Range | 0000000 | Each | 00000 |
| Optional Gauge for Removable T-Handle Regulators with 0-200 psi Pressure Regulating Range | 0000000 | Each | 00000 |
Festo Modular Compressed Air Regulators
Adjust and maintain the pressure of your compressed air. All regulators are relieving style, so they exhaust when the downstream pressure exceeds the set pressure. They have a locking head to prevent unintentional pressure changes. Install in your air line after filters.
Joiner clamps (sold separately) connect the regulator to another Festo modular component with the same series number. They come with mounting brackets to attach the regulator to a wall or equipment.
End block sets (sold separately) allow you to swap out filter/regulator/lubricator components without unthreading your air line connections. The blocks remain connected to your pipe while you replace components between them.
Regulators | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe size | Overall | Joiner Clamps | End Block Sets | ||||||||||||||
| Manufacturer Series | Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Gauge Included | Wd. | Ht. | Max. Temp., °F | For Max. Shackle Dia. | Regulating Accuracy | Pressure Regulating Range, psi | Each | Each | Each | |||
Aluminum Housing | |||||||||||||||||
Series No. 4—NPT Female Inlet and Outlet | |||||||||||||||||
| MS4 | 1/4 | 1/4 | 65 scfm @ 100 psi | 206 | Yes | 1 5/8" | 5" | 140° | 5/8" | Not Rated | 7.4-176 | 0000000 | 000000 | 0000000 | 000000 | 0000000 | 000000 |
| MS4 | 3/8 | 3/8 | 65 scfm @ 100 psi | 206 | Yes | 1 5/8" | 5" | 140° | 5/8" | Not Rated | 7.4-176 | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |
Series No. 6—NPT Female Inlet and Outlet | |||||||||||||||||
| MS6 | 1/2 | 1/2 | 230 scfm @ 100 psi | 294 | Yes | 2 1/2" | 7 3/4" | 140° | 5/8" | Not Rated | 7.4-176 | 0000000 | 00000 | 0000000 | 00000 | 0000000 | 00000 |
| MS6 | 3/4 | 3/4 | 230 scfm @ 100 psi | 294 | Yes | 2 1/2" | 7 3/4" | 140° | 5/8" | Not Rated | 7.4-176 | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |
Series No. 9—NPT Female Inlet and Outlet | |||||||||||||||||
| MS9 | 1 | 1 | 375 scfm @ 100 psi | 290 | Yes | 4 1/8" | 8 7/8" | 140° | 5/8" | Not Rated | 7.25-174 | 0000000 | 000000 | 0000000 | 00000 | 0000000 | 00000 |
Compressed Air Regulators for Air-Powered Tools
Install these regulators directly on your air-powered tool to maintain the set air pressure.
Nonrelieving regulators do not exhaust excess downstream pressure. These regulators are intermittent duty, so they’re ideal for tools that require short bursts of air, such as nailers, staplers, and small drills.
Regulators with a collar adjustment have a screw lock to prevent accidental changes to the set pressure as you use and jostle your tool. Turn the collar to adjust the pressure.
Regulators with a dial adjustment let you see the set pressure at a glance. Twist the dial to adjust the pressure, then slide the lock to prevent accidental changes as you use and jostle your tool.
Pipe size | Overall | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Gauge Included | Wd. | Ht. | Housing Material | Max. Temp., °F | Regulating Accuracy | Pressure Regulating Range, psi | Each | |
NPT Female Inlet × NPT Male Outlet | ||||||||||||
Collar with Screw Lock | ||||||||||||
| 1/4 | 1/4 | 18 scfm @ 100 psi | 150 | No | 3 1/8" | 7/8" | Brass | 175° | ±2.5 psi | 50-145 | 00000000 | 000000 |
| 3/8 | 1/4 | 18 scfm @ 100 psi | 150 | No | 3 7/8" | 1 1/8" | Aluminum | 175° | ±2.5 psi | 50-145 | 00000000 | 00000 |
| 3/8 | 3/8 | 18 scfm @ 100 psi | 150 | No | 3 7/8" | 1 1/8" | Aluminum | 175° | ±2.5 psi | 50-145 | 00000000 | 00000 |
NPT Female Inlet × NPT Female Outlet | ||||||||||||
Dial with Slide Lock | ||||||||||||
| 1/4 | 1/4 | 12 scfm @ 100 psi | 400 | No | 2 1/2" | 1 1/4" | Aluminum | 175° | ±3.5 psi | 40-140 | 0000000 | 00000 |
DIN-Mount Compressed Air Regulators
Mount these regulators to a 35 mm DIN rail with the included brackets. Use them to adjust and maintain the pressure of your compressed air. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. A padlock can be attached to the knob to prevent unauthorized changes to the pressure. Install these regulators in your air line after your filters.
Pipe Size | Overall | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Gauge Included | For DIN Rail Ht., mm | Wd. | Ht. | Max. Temp., °F | Includes | Regulating Accuracy | Pressure Regulating Range, psi | Each | |
Acetal Plastic Housing | |||||||||||||
NPT Female Inlet and Oulet | |||||||||||||
| 1/8 | 1/8 | 42 scfm @ 100 psi | 217 | Yes | 35 | 1 5/8" | 4" | 120° | Two DIN-Rail Mounting Brackets | ±1 psi | 0-116 | 00000000 | 000000 |
| 1/4 | 1/4 | 99 scfm @ 100 psi | 217 | Yes | 35 | 1 5/8" | 4" | 120° | Two DIN-Rail Mounting Brackets | ±1 psi | 0-116 | 0000000 | 00000 |
| 3/8 | 3/8 | 188 scfm @ 100 psi | 188 | Yes | 35 | 2 3/8" | 5 7/16" | 120° | Two DIN-Rail Mounting Brackets | ±1 psi | 0-116 | 0000000 | 00000 |
| 1/2 | 1/2 | 99 scfm @ 100 psi | 188 | Yes | 35 | 2 3/8" | 5 7/16" | 120° | Two DIN-Rail Mounting Brackets | ±1 psi | 0-116 | 0000000 | 00000 |
| 3/4 | 3/4 | 267 scfm @ 100 psi | 188 | Yes | 35 | 2 3/8" | 5 7/16" | 120° | Two DIN-Rail Mounting Brackets | ±1 psi | 0-116 | 00000000 | 000000 |
Electronically-Controlled Compressed Air Regulators with Display
Monitor and adjust compressed air pressure at the source and remotely. These regulators use an electronic pressure sensor and a color-changing display to give you instant feedback—green for in range, red for out of range, and yellow for errors. Set the pressure using the knob, display buttons, or connect them to your programmable logic control (PLC) via IO-Link. When connected to your industrial network, you’ll be able to change settings remotely, monitor performance, and run diagnostics. You’ll need an M8 connecting cable (sold separately) to link them to your network. Install these regulators in your air line after filters.
To prevent unauthorized or accidental changes, lock the knob with a padlock. You can also protect settings made on the display and PLC with a PIN code.
Mounting brackets (sold separately) allow you to attach the regulator to a wall or equipment.
Regulators | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Overall | Mounting Brackets | Connecting Cables | ||||||||||||||
| Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Current, mA | Voltage | Wd. | Ht. | Max. Temp., °F | Features | Regulating Accuracy | Pressure Regulating Range, psi | Each | Each | Each | |||
Aluminum Housing | |||||||||||||||||
NPT Female Inlet and Outlet—LCD Display | |||||||||||||||||
| 3/8 | 3/8 | 265 scfm @ 100 psi | 290 | 20 | 18-30V DC | 2 3/4" | 6 1/2" | 145° | Display PIN Lock, Padlockable Knob | ±2.2 psi | 4-145 | 0000000 | 0000000 | 00000000 | 000000 | 0000000 | 000000 |
| 1/2 | 1/2 | 265 scfm @ 100 psi | 290 | 20 | 18-30V DC | 2 3/4" | 6 1/2" | 145° | Display PIN Lock, Padlockable Knob | ±2.2 psi | 4-145 | 0000000 | 000000 | 00000000 | 00000 | 0000000 | 00000 |
| 3/4 | 3/4 | 265 scfm @ 100 psi | 290 | 20 | 18-30V DC | 2 3/4" | 6 1/2" | 145° | Display PIN Lock, Padlockable Knob | ±2.2 psi | 4-145 | 0000000 | 000000 | 00000000 | 00000 | 0000000 | 00000 |
Precision Compressed Air Regulators
Use these regulators in sensitive applications that require constant, consistent pressure for precise force and movement. They’re often used on calibration stands in laboratories or with air-powered clamps that hold delicate items. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install them in your air line after filters.
BSPP threads are also known as G threads.
Regulators with a ±0.1% accuracy have a sensor and a servo-adjustment mechanism that work together to monitor pressure and instantly adapt to input pressure changes—even when conditions change. They have a locking nut to prevent accidental pressure changes.
Mounting brackets (sold separately) let you attach the regulator to a wall or equipment.
Regulators | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Overall | Mounting Brackets | |||||||||||||
| Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Gauge Included | No. of Gauge Ports | Wd. | Ht. | Housing Material | Max. Temp., °F | Features | Choose a Pressure Regulating Range, psi | Each | Each | ||
NPT Female Inlet and Outlet | |||||||||||||||
±0.1% Regulating Accuracy | |||||||||||||||
| 1/8 | 1/8 | 14 scfm @ 100 psi | 150 | No | 1 | 2 1/8" | 4 1/4" | Zinc | 160° | Servo-Adjustment Mechanism, Locking Nut | 0000000 | 0000000 | 000000 | 00 | |
| 1/4 | 1/4 | 14 scfm @ 100 psi | 150 | No | 2 | 2 1/8" | 4 1/4" | Zinc | 160° | Servo-Adjustment Mechanism, Locking Nut | 0000000 | 000000 | 0000000 | 000000 | |
| 3/8 | 3/8 | 14 scfm @ 100 psi | 150 | No | 2 | 2 1/8" | 4 1/4" | Zinc | 160° | Servo-Adjustment Mechanism, Locking Nut | 0000000 | 000000 | 0000000 | 00000 | |
BSPP Female Inlet and Outlet | |||||||||||||||
±0.1% Regulating Accuracy | |||||||||||||||
| 1/4 | 1/4 | 14 scfm @ 100 psi | 150 | No | 2 | 2 1/8" | 4 1/4" | Zinc | 160° | Servo-Adjustment Mechanism, Locking Nut | 0000000 | 000000 | 0000000 | 00000 | |
Clean Room Precision Compressed Air Regulators
When precision and cleanliness are critical—such as semiconductor manufacturing and food processing—these regulators are cleaned and bagged in an ISO Class 3 clean room to prevent contamination. They deliver steady air pressure to generate precise, repeatable movement. A locking adjustment knob secures your settings to prevent accidental changes. All are relieving regulators, so they exhaust when the downstream pressure exceeds the set pressure. Install them in your air line after filters.
BSPP threads are also known as G threads.
Regulators | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Pipe Size | Overall | Mounting Brackets | |||||||||||||
| Inlet | Outlet | Max. Flow Rate | Max. Pressure, psi | Gauge Included | Wd. | Ht. | Housing Material | Max. Temp., °F | Environmental Rating | Features | Choose a Pressure Regulating Range, psi | Each | Each | ||
NPT Female Inlet and Outlet | |||||||||||||||
±1% Regulating Accuracy | |||||||||||||||
| 1/8 | 1/8 | 10 scfm @ 100 psi | 100 | Yes | 1 5/8" | 3 7/8" | Aluminum | 140° | Fed. Std. Class 1, ISO Class 3 | Locking Adjustment Knob | 000000 | 000000 | 0000000 | 00000 | |
| 1/4 | 1/4 | 21 scfm @ 100 psi | 100 | Yes | 2 1/8" | 4 5/8" | Aluminum | 140° | Fed. Std. Class 1, ISO Class 3 | Locking Adjustment Knob | 000000 | 00000 | 0000000 | 0000 | |
| 3/8 | 3/8 | 21 scfm @ 100 psi | 100 | Yes | 2 1/8" | 4 5/8" | Aluminum | 140° | Fed. Std. Class 1, ISO Class 3 | Locking Adjustment Knob | 000000 | 00000 | 0000000 | 0000 | |
| 1/2 | 1/2 | 31 scfm @ 100 psi | 100 | Yes | 2 3/4" | 5 7/8" | Aluminum | 140° | Fed. Std. Class 1, ISO Class 3 | Locking Adjustment Knob | 000000 | 000000 | 0000000 | 0000 | |
BSPP Female Inlet and Outlet | |||||||||||||||
±1% Regulating Accuracy | |||||||||||||||
| 1/4 | 1/4 | 21 scfm @ 100 psi | 100 | Yes | 2 1/8" | 4 5/8" | Aluminum | 140° | Fed. Std. Class 1, ISO Class 3 | Locking Adjustment Knob | 000000 | 00000 | 0000000 | 0000 | |
BSPT Female Inlet and Outlet | |||||||||||||||
±1% Regulating Accuracy | |||||||||||||||
| 1/4 | 1/4 | 21 scfm @ 100 psi | 100 | Yes | 2 1/8" | 4 5/8" | Aluminum | 140° | Fed. Std. Class 1, ISO Class 3 | Locking Adjustment Knob | 000000 | 00000 | 0000000 | 0000 | |
Tamper-Resistant Padlockable Covers for
Parker Modular Compressed Air Regulators
Lock these covers over your regulator knob to prevent unwanted pressure changes. They work with any Parker regulating component in the P31 or P32 series. Secure with a padlock.