Prep-Air II Lubricators | Parker 15L Economy Series



  • 1/4" or 3/8" ports
  • Proportional oil delivery over a wide range of air flows
  • Generates oil particles of 5 micron or smaller downstream to lubricate systems with complex piping arrangements
  • Precision needle valve assures repeatable oil delivery and provides simple adjustment
  • Transparent sight dome for 360° visibility
  • Removable drip control knob for tamper resistance



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Part Numbers

Part Number*  Description

Port Size


Max. Bar (psig)

Height (E)

mm (in)

Width (A)

mm (in)

Depth (B)

mm (in)


Poly bowl w/ metal guard, no drain

 1/4" 40 10.3 (150) 193 (7.61) 51 (2.00) 52 (2.06)

Metal bowl w/ sight gauge, twist drain

1/4" 40 17.2 (250) 193 (7.61) 51 (2.00) 52 (2.06)
15L22N Poly bowl w/ metal guard, no drain 3/8" 40 10.3 (150) 193 (7.61)    51 (2.00)
52 (2.06)
15L24N Metal bowl w/ sight gauge, twist drain 3/8" 40 17.2 (250) 193 (7.61) 51 (2.00) 52 (2.06)

* For fill plug option, replace "N" with "B". Place a "1" after the part number for BSPP ports. Place a "2" after the part number for BSPT ports.  See ordering information chart below for other bowl and fill options. Suggested lubricant: F442 oil - petroleum-based oil of 100 to 200 viscosity at 100°F. Do not use oils with additives, compounded oils containing solvents, graphite, detergents or synthetic oils.


F= 45 mm (1.77 in)
C1= 85 mm (3.35 in)

FService Kits and Accessories

Part Number Description
PS905P Bowl guard kit
PS946P Bowl kit - poly bowl, no drain
PS929P Bowl kit - metal bowl, twist drain
PS740P Sight dome kit
Sight gauge kit
Liquid level sensor kit
PS916P Pressure fill adapter kit
PS948P Service kit
P04121 Adjustment knob
PS943P Mounting bracket kit

Technical Specifications

Flow Capacity:

1/4": 40 SCFM

3/8": 40 SCFM

Operating Temperature:

32°F to 125°F - poly bowl

32°F to 175°F - metal bowl

Max. Supply Pressure: 17.2 bar (250 psig)
Port Size: 1/4", 3/8" (NPT, BSPP, BSPT)
Bowl Capacity: 2 oz
Weight: 1 lb (0.45 kg)

Warning Triangle WARNING: These products can expose you to chemicals including lead and/or DEHP and/or carbon black, which are known to the State of California to cause cancer or birth defects or other reproductive harm.  For more information go to