SMC Type AC FRL Unit

The SMC Type AC FRL Unit (Filter-Regulator-Lubricator) is a pneumatic fundamental component that integrates air source filtration, pressure reduction and regulation, and lubrication treatment. It provides clean, stable, and lubricated compressed air for pneumatic systems, thereby extending the lifespan of pneumatic components and enhancing system stability.The OLK AC Series FRL Unit acts as the essential "guardian" of modern pneumatic systems.

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Product Description

SMC Type AC FRL Unit Features & Design:

Self-Locking Adjustment: Features a pressure self-locking mechanism. Once the desired pressure is set, simply push the knob down to lock it. This prevents the set pressure from changing due to external vibrations or accidental contact.

Versatile Drainage: Available in both Manual Drain and Auto Drain options to suit different operating conditions. The transparent bowl allows for easy monitoring of water levels.

High-Precision Gauge: Equipped with a high-precision pressure gauge for clear, accurate readings and real-time monitoring of system pressure.

SMC Type AC FRL Unit Notice:

Check Flow Direction: Please verify the airflow direction before installation! There are flow direction marks (Arrows or IN/OUT) on the top of the valve body. Strictly follow these indicators for installation. Installing in reverse will cause malfunction or leakage.

Regular Maintenance: Check the water level in the bowl regularly and drain it if using a manual drain type. Refill the lubricator oil when low (ISO VG32 Turbine Oil is recommended).

SMC Type AC FRL Unit Symbol:

Ordering code
AC	2000	-	02	-	D
Series code	Shell size		Port size:		Drain Method
AC：SMC Type AC FRL Unit	1000		M5:M5		Blank:Manual Drain
	2000		02:1/4		A:Differential Pressure Drain
	3000		03:3/8		D:Auto drain
	4000		04:1/2
	5000		06:3/4
			10:1

Proof pressure	1.5 Mpa(15.3kgf/cm³）
Max.Working pressure	1.0Mpa(10.2kgf/cm³）
Environment and fluid temperature	5-60℃
Filter aperture	5μm
Oil	ISOVG32
Cup materials	PC
Cup hood	AC1000-2000(WIHTOUT) AC3000-5000 (WITH)
Pressure regulating range	AC1000:0.05-0.7 Mpa (0.51-7.1 kgf/cm³） AC2000-5000:0.05-0.085 Mpa(0.51-8.7 kgf/cm³）

Pressure gauge orifice series

	2000 series	3000 series	4000 series	5000 series
AW	1/8		1/4
AC	1/8		1/4
BR	1/4			-
BFC	1/4			-

Installation steps for the SMC Type AC FRL Unit:

First, install the joints with wrapped PTFE tape and the pressure gauge

2. Follow the arrow direction: the left side is the air intake, and the right side is the air outlet

3. Connect the air tubes to the respective fittings at both ends

4. Lift the pressure adjustment nut upward and rotate it to regulate the pressure; turning clockwise increases air flow, while turning counterclockwise decreases air flow

5. Adjust to the desired air pressure, then press the adjusting nut downward to lock the air

6. If fuel is needed, loosen the screw on the oiler

7. Pour pneumatic maintenance oil or turbine oil into the oil inlet (ensure the pneumatic oil does not exceed the oil level line indicated on the cup)

8. After filling the pneumatic oil, tighten the nut with an Allen wrench

9. Adjust the oil supply by rotation: clockwise increases the oil flow, counterclockwise decreases it

Drain Type	Working Principle	Application Environment	Advantages	Disadvantages
Manual Drain	Water accumulated in the filter bowl is discharged by manually rotating or pressing the drain valve at regular intervals. Whether the drainage is complete depends entirely on manual operation.	Simple systems or applications with infrequent drainage requirements.	Simple structure, low failure rate, no additional maintenance required.	Relies on manual operation; easy to forget draining. Excessive water accumulation may affect filtration performance.
Differential Pressure Drain	Uses the pressure difference before and after the filter. When condensate accumulation increases and the pressure differential reaches a preset value, the drain opens automatically. It closes again once the pressure differential returns to normal. Operates only when there is air pressure and flow.	Environments with stable air supply and simple operating conditions, where manual operation is not convenient.	No power supply required. Automatic drainage, more reliable than manual draining.	Requires stable air pressure. Drainage performance is limited during long shutdowns or when there is no pressure differential.
Automatic Drain	Uses a float mechanism or timer. When condensate reaches a certain level, the drain opens automatically	Automated production lines and systems with high compressed air quality requirements.	Most timely and stable drainage performance.	Relatively higher cost.

AFQs:

Why is it called the AC FRL?

AF (Air Filter) + AR (Pressure Regulating Valve) + AL (Oil Mist Lubricator) = AC Triple Unit

Recommended connection method

Air compressor -- Air source processor -- Control component -- Actuator

What should I do if the plastic cup protective cover often breaks easily?

Some customers often find that plastic cups crack not due to pressure but because of the material. Plastic cups are not resistant to certain environments, making metal cups a better alternative in specific conditions

How to extend the service life of solenoid valve cylinders?

Using a filter can remove moisture and impurities from the air, effectively reducing friction damage to pistons and sealing rings. A lubricator can be used to add turbine oil, which is then carried by the air to lubricate the cylinder piston and sealing rings. The pressure regulator can adjust the intake air pressure, further improving work efficiency

What material is the filter element made of for OLK?

OLK uses copper filter elements with a filtration accuracy of 25μm, while ordinary fiber filter elements have an accuracy of only 5μm. High-precision filter elements can effectively remove impurities and moisture from the gas, ensuring the output air is dry and free of contaminants

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