Available to order
Request a QuoteNeed multiple units or help confirming a model? Contact our team.
Shop with confidence. If for any reason you are not satisfied, you can take advantage of our hassle-free return and exchange service within 30 days. The seller covers all shipping costs for returns or exchanges—there are no extra shipping fees for you to pay, ensuring a worry-free shopping experience.
Available payment methods
Ships from 4 U.S. Warehouses – Contact Us for Estimated Delivery Times.
Technical specifications, features, applications and purchasing information.
| Brand | FESTO |
| Model Number Provided | GRLA-18-QS-4-D |
| Official Festo Model Designation | GRLA-1/8-QS-4-D |
| Manufacturer Part Number | 193143 |
| Product Category | One-Way Flow Control Valve |
| Product Series | GRLA-D |
| GTIN | 4052568043834 |
| Valve Function | Exhaust Air One-Way Flow Control / Non-Return Function |
| Pneumatic Connection, Port 1 | QS-4 Push-In Connection |
| Compatible Tube Outside Diameter | 4 mm |
| Pneumatic Connection, Port 2 | G1/8 Thread |
| Adjustment Component | Slotted Head Screw |
| Mounting Method | Screw-In |
| Mounting Position | Any |
| Standard Nominal Flow Rate, Flow Control Direction | 160 L/min |
| Standard Nominal Flow Rate, Non-Return Direction | 120 to 190 L/min |
| Flow Rate in Flow Control Direction at 6 to 0 bar | 250 L/min |
| Flow Rate in Non-Return Direction at 6 to 0 bar | 270 to 300 L/min |
| Operating Pressure | 0.2 to 10 bar |
| Operating Medium | Compressed Air According to ISO 8573-1:2010 [7:4:4] |
| Lubricated Air Operation | Permitted; Continued Lubrication Required After Lubricated Operation |
| Ambient Operating Temperature | -10 to +60°C |
| Operating Medium Temperature | -10 to +60°C |
| Nominal Tightening Torque | 3 N·m |
| Tightening Torque Tolerance | ±10% |
| Product Weight | 22 g |
| Swivel Joint Material | Chromated Die-Cast Zinc |
| Screwed Plug Material | Wrought Aluminum Alloy |
| Adjustment Screw Material | Brass |
| Seal Material | NBR |
| Release Ring Material | POM |
| Cleanroom Classification | Class 4 According to ISO 14644-1 |
| LABS / PWIS Conformity | VDMA 24364-B1/B2-I |
| Material Compliance | RoHS Compliant |
| Manufacturer Technical Reference | Festo GRLA-1/8-QS-4-D Datasheet, Article 193143 |
| Model Identification Note | GRLA-18-QS-4-D Is Commonly Written Without the Slash; Confirm the Product Label Matches Official Model GRLA-1/8-QS-4-D |
The FESTO GRLA-18-QS-4-D, officially designated GRLA-1/8-QS-4-D, is a one-way flow control valve designed to regulate exhaust airflow in compatible pneumatic systems. This enables controlled cylinder movement when correctly installed and adjusted.
The valve combines a G1/8 threaded pneumatic connection with a QS-4 push-in fitting for tubing with a 4 mm outside diameter, supporting compact installation on compatible pneumatic components.
Festo specifies a standard nominal flow rate of 160 L/min in the flow control direction. The actual airflow depends on pressure differential, adjustment position and system conditions.
The one-way design allows controlled airflow in the designated restriction direction and less-restricted flow in the opposite direction, supporting efficient pneumatic motion control.
A slotted head screw provides mechanical adjustment of airflow restriction, allowing technicians to tune pneumatic actuator speed according to the machine operating requirements.
With a product weight of approximately 22 g, a chromated die-cast zinc swivel joint, aluminum-alloy threaded connection and NBR seals, the valve is designed for compatible compressed-air installations operating from 0.2 to 10 bar.
We support online purchase of the FESTO GRLA-18-QS-4-D One-Way Flow Control Valve. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is the FESTO GRLA-18-QS-4-D?
It is a one-way pneumatic flow control valve used to regulate exhaust airflow in compatible pneumatic systems. Festo lists the official model as GRLA-1/8-QS-4-D with manufacturer part number 193143.
Is GRLA-18-QS-4-D the same as GRLA-1/8-QS-4-D?
The supplied designation appears to omit the slash used in Festo's official G1/8 connection notation. Confirm the product label and manufacturer part number 193143 before treating the two designations as identical.
What is the function of this valve?
It provides adjustable exhaust air flow control with a non-return function in the opposite flow direction. It is commonly used to adjust pneumatic cylinder movement speed.
What pneumatic connection sizes does it use?
The valve has one QS-4 push-in connection for 4 mm outside-diameter tubing and one G1/8 threaded connection.
What is the operating pressure range?
Festo specifies an operating pressure range of 0.2 to 10 bar across the applicable operating temperature range.
What is the nominal flow rate?
The standard nominal flow rate is 160 L/min in the flow control direction and 120 to 190 L/min in the non-return direction. Flow values vary according to test and operating conditions.
How is airflow adjusted?
Airflow restriction is adjusted using the slotted head screw. The adjustment should be performed in accordance with the pneumatic system's commissioning procedure.
Can this valve be used with compressed air?
Yes. Festo specifies compressed air meeting ISO 8573-1:2010 [7:4:4] requirements as the operating medium.
Can lubricated compressed air be used?
Yes. Lubricated operation is permitted, but Festo states that lubrication must be maintained for subsequent operation once the valve has been used with lubricated air.
What is the operating temperature range?
Both the ambient and compressed-air medium temperature ranges are specified as -10 to +60°C.
What is the difference between GRLA-1/8-QS-4-D and GRLA-1/8-QS-4-RS-D?
The GRLA-1/8-QS-4-D uses a slotted adjustment screw, while the GRLA-1/8-QS-4-RS-D uses a knurled adjustment screw with a lock nut. Verify installation requirements before substituting variants.
What should be checked before ordering?
Confirm the official Festo designation GRLA-1/8-QS-4-D, manufacturer part number 193143, G1/8 thread, QS-4 connection for 4 mm tubing, exhaust air flow control function, 0.2 to 10 bar operating pressure, slotted screw adjustment and compatibility with the intended pneumatic circuit.
Send us your part number and technical requirements.
Explore more industrial components from our catalog.
Available in stock (200)
| Brand | FESTO |
| Model Number Provided | GRLA-18-QS-4-D |
| Official Festo Model Designation | GRLA-1/8-QS-4-D |
| Manufacturer Part Number | 193143 |
| Product Category | One-Way Flow Control Valve |
| Product Series | GRLA-D |
| GTIN | 4052568043834 |
| Valve Function | Exhaust Air One-Way Flow Control / Non-Return Function |
| Pneumatic Connection, Port 1 | QS-4 Push-In Connection |
| Compatible Tube Outside Diameter | 4 mm |
| Pneumatic Connection, Port 2 | G1/8 Thread |
| Adjustment Component | Slotted Head Screw |
| Mounting Method | Screw-In |
| Mounting Position | Any |
| Standard Nominal Flow Rate, Flow Control Direction | 160 L/min |
| Standard Nominal Flow Rate, Non-Return Direction | 120 to 190 L/min |
| Flow Rate in Flow Control Direction at 6 to 0 bar | 250 L/min |
| Flow Rate in Non-Return Direction at 6 to 0 bar | 270 to 300 L/min |
| Operating Pressure | 0.2 to 10 bar |
| Operating Medium | Compressed Air According to ISO 8573-1:2010 [7:4:4] |
| Lubricated Air Operation | Permitted; Continued Lubrication Required After Lubricated Operation |
| Ambient Operating Temperature | -10 to +60°C |
| Operating Medium Temperature | -10 to +60°C |
| Nominal Tightening Torque | 3 N·m |
| Tightening Torque Tolerance | ±10% |
| Product Weight | 22 g |
| Swivel Joint Material | Chromated Die-Cast Zinc |
| Screwed Plug Material | Wrought Aluminum Alloy |
| Adjustment Screw Material | Brass |
| Seal Material | NBR |
| Release Ring Material | POM |
| Cleanroom Classification | Class 4 According to ISO 14644-1 |
| LABS / PWIS Conformity | VDMA 24364-B1/B2-I |
| Material Compliance | RoHS Compliant |
| Manufacturer Technical Reference | Festo GRLA-1/8-QS-4-D Datasheet, Article 193143 |
| Model Identification Note | GRLA-18-QS-4-D Is Commonly Written Without the Slash; Confirm the Product Label Matches Official Model GRLA-1/8-QS-4-D |
The FESTO GRLA-18-QS-4-D, officially designated GRLA-1/8-QS-4-D, is a one-way flow control valve designed to regulate exhaust airflow in compatible pneumatic systems. This enables controlled cylinder movement when correctly installed and adjusted.
The valve combines a G1/8 threaded pneumatic connection with a QS-4 push-in fitting for tubing with a 4 mm outside diameter, supporting compact installation on compatible pneumatic components.
Festo specifies a standard nominal flow rate of 160 L/min in the flow control direction. The actual airflow depends on pressure differential, adjustment position and system conditions.
The one-way design allows controlled airflow in the designated restriction direction and less-restricted flow in the opposite direction, supporting efficient pneumatic motion control.
A slotted head screw provides mechanical adjustment of airflow restriction, allowing technicians to tune pneumatic actuator speed according to the machine operating requirements.
With a product weight of approximately 22 g, a chromated die-cast zinc swivel joint, aluminum-alloy threaded connection and NBR seals, the valve is designed for compatible compressed-air installations operating from 0.2 to 10 bar.
We support online purchase of the FESTO GRLA-18-QS-4-D One-Way Flow Control Valve. If you need to make bulk purchases and inquire about other products, please contact our team to inform us of your purchase requirements. We will provide you with information such as quantity quotations, delivery dates, and transportation methods.
What is the FESTO GRLA-18-QS-4-D?
It is a one-way pneumatic flow control valve used to regulate exhaust airflow in compatible pneumatic systems. Festo lists the official model as GRLA-1/8-QS-4-D with manufacturer part number 193143.
Is GRLA-18-QS-4-D the same as GRLA-1/8-QS-4-D?
The supplied designation appears to omit the slash used in Festo's official G1/8 connection notation. Confirm the product label and manufacturer part number 193143 before treating the two designations as identical.
What is the function of this valve?
It provides adjustable exhaust air flow control with a non-return function in the opposite flow direction. It is commonly used to adjust pneumatic cylinder movement speed.
What pneumatic connection sizes does it use?
The valve has one QS-4 push-in connection for 4 mm outside-diameter tubing and one G1/8 threaded connection.
What is the operating pressure range?
Festo specifies an operating pressure range of 0.2 to 10 bar across the applicable operating temperature range.
What is the nominal flow rate?
The standard nominal flow rate is 160 L/min in the flow control direction and 120 to 190 L/min in the non-return direction. Flow values vary according to test and operating conditions.
How is airflow adjusted?
Airflow restriction is adjusted using the slotted head screw. The adjustment should be performed in accordance with the pneumatic system's commissioning procedure.
Can this valve be used with compressed air?
Yes. Festo specifies compressed air meeting ISO 8573-1:2010 [7:4:4] requirements as the operating medium.
Can lubricated compressed air be used?
Yes. Lubricated operation is permitted, but Festo states that lubrication must be maintained for subsequent operation once the valve has been used with lubricated air.
What is the operating temperature range?
Both the ambient and compressed-air medium temperature ranges are specified as -10 to +60°C.
What is the difference between GRLA-1/8-QS-4-D and GRLA-1/8-QS-4-RS-D?
The GRLA-1/8-QS-4-D uses a slotted adjustment screw, while the GRLA-1/8-QS-4-RS-D uses a knurled adjustment screw with a lock nut. Verify installation requirements before substituting variants.
What should be checked before ordering?
Confirm the official Festo designation GRLA-1/8-QS-4-D, manufacturer part number 193143, G1/8 thread, QS-4 connection for 4 mm tubing, exhaust air flow control function, 0.2 to 10 bar operating pressure, slotted screw adjustment and compatibility with the intended pneumatic circuit.
