IMI NORGREN L64C Installation & Maintenance Instructions Download Page 1

ADJUSTMENT

1. Turn on system pressure. 
2. Adjust lubricator drip rate only when there is a constant

rate of air flow through the lubricator. Monitor drip rate
through sight feed dome (3).

3.

Oil-Fog Lubricators

- Determine the average rate of flow

through the lubricator. Turn green knob (3) to obtain one
drop per minute for each 5 dm

3

/s (10 scfm). For

example, if the average flow is 19 dm

3

/s (40 scfm), set

the drip rate at 4 drops per minute. Turn knob
counterclockwise to increase and clockwise to decrease
the drip rate. The oil feed setting can be locked by
pushing the lock ring down, this must be released before
adjustment by pulling up.

4.

Micro-Fog Lubricators

- Oil drip rate is adjusted by the

red knob above the sight-feed dome, counterclockwise to
increase and clockwise to decrease the drip rate. The rate
changes automatically to compensate for flow variations.
The oil feed setting can be locked by pushing the lock
ring down, this must be released before adjustment by
pulling up. 
See Drip Rate Chart. Turn knob counterclockwise to
increase and clockwise to decrease the drip rate.

Drip Rate Chart for Micro-Fog Lubricators

Flow - dm

3

/s (scfm)

Drops per Minute

2,4 (5)

10

5 (10)

11

9 (20)

13

14 (30)

15

19 (40)

17

24 (50)

19

28 (60)

22

34 (70)

24

38 (80)

26

43 (90)

28

48 (100)

30

5. Monitor the device being lubricated for a few days

following initial adjustment. Adjust the drip rate if the oil
delivery at the device appears either excessive or low.

DISASSEMBLY

1. Shut off inlet pressure. Reduce pressure in inlet and

outlet lines to zero. Loosen fill plug (1).

2. Remove reservoir - push into body and turn

counterclockwise.

3. Disassemble in general accordance with the item

numbers on exploded view.  Do not remove the manual
drain unless replacement is necessary. Remove and
replace drain assembly only if drain malfunctions. Do not
remove syphon tube (53). Remove and replace items 54
through 59 only if lubricator malfunctions.

CLEANING

1. Clean plastic reservoir with warm water only. Clean other

parts using warm water and soap. 

2. Dry parts. Blow out internal passages in body with clean,

dry compressed air. 

3. Inspect parts. Replace parts found to be damaged. If

plastic reservoir shows signs of cracking or cloudiness,
replace with a metal reservoir.

ASSEMBLY

1. Lubricate o-rings, the portion of the manual drain body

(19, 33) that contacts the bowl, and the hole in the
manual drain body that accommodates the stem of drain
valve (20, 34) with o-ring grease.

2. Assemble lubricator as shown on exploded view.
3. Assemble the 1 litre (1 quart) liquid indicator parts (69

through 74) to reservoir. Apply a 0,9 to 1,8 kg (2 to 4
pound) clamping force to upper and lower sight glass
brackets (70). Tighten screws (69). 

3. Torque Table

N-m (Inch-Pounds)

3 (Dome) 

2,3 to 2,8 (20 to 25)

43 (Screw)

1,7 to 2,3 (15 to 20)

55 (Screw)

1,1 to 1,6 (10 to 14)

69 (Screw)

0,9 to 1,1 (8 to 10)

4. Push reservoir, or reservoir with guard, into body and

turn fully clockwise.

TECHNICAL DATA

Fluid: Compressed air
Maximum pressure:

Guarded transparent bowl: 10 bar (150 psig)
Metal bowl: 17 bar (250 psig)

Operating temperature*: 

Transparent bowl: –20° to +50°C (0° to +125°F)
Metal bowl: –20° to +80°C (0° to +175°F)

* Air supply must be dry enough to avoid ice formation at

temperatures below +2°C (+35°F).

Start point (minimum flow required  for lubricator

operation) at 6,3 bar (90 psig) inlet pressure: 
1,5 dm

3

/s (3.2 scfm)

Nominal bowl capacity: 0,2 litre (7 fluid oz), standard

1 litre (1 quart US), optional

Materials:

Body: Zinc
Bowl:

Metal: Aluminium
Transparent, optional: Polycarbonate

Metal bowl liquid level indicator lens, 

standard: Grilamid

Metal bowl sight glass, optional (standard on 

1 litre bowl): Pyrex

Sight dome: Polycarbonate
Elastomers: Synthetic rubber

REPLACEMENT ITEMS

Service kit, contains required items circled: ..........4382-200
Prismatic sight glass..............................................4380-042
Pyrex sight glass....................................................4380-041
Pyrex sight glass, 1 litre bowl..................................2273-22
Manual drain ..............................................................684-84

INSTALLATION

1. Install unit vertically in air line -

vertically (bowl down),

with air flow in direction of arrow on body,

upstream of cycling valves

as close as possible to the device being lubricated,

Oil-Fog Models - Not more than 5,2m (15 feet) from 
the device being lubricated, and at the same height or 
higher than the device.

2. Before assembling the basic unit into the yoke the port

seal o-rings should be lightly smeared with o-ring
grease. 

3. Locate clamp ring under lugs on top of yoke, offer basic

unit into yoke with directional arrows correctly aligned
(an interference fit prevents assembly if misaligned)
before engaging and fully tightening the clamp ring.

4. Turn bowl or bowl guard fully clockwise into body before

pressurizing. Lock symbols on body and bowl guards
must align.

RECOMMENDED LUBRICANTS

Fill reservoir with a good quality, light, misting type oil

 

for compressed air tools.  See 

our

 publication

N/AL.8.900.935. Fill to maximum fill line on transparent

 

reservoirs. Oil level must always be visible in lens on metal

 

reservoirs. Do not overfill.

FILL RESERVOIR (OIL-FOG LUBRICATORS)

Remove fill plug (1), add oil, and reinstall fill plug. Fill

 

plug can be removed and oil added without shutting off air

 

pressure to the lubricator.

FILL RESERVOIR (MICRO-FOG LUBRICATORS)

Shut off inlet air pressure and reduce pressure in

 

reservoir to zero. Remove fill plug (1), add oil, and reinstall

 

fill plug. 

Do not remove the fill plug when the reservoir is

 

pressurized, as oil will blow out the fill plug hole.

………continued over

L64

 

★★

P -  

★★

N

Port

2.....1/4

"

3.....3/8

"

4.....1/2

"

6.....3/4

"

Thread

A ....PTF
B ....ISO Rc taper

G ....ISO G parallel 
N ....No thread (basic unit)

Bowl/Reservoir

A ....optional 1 litre (1 quart US) metal
D ....Metal
P ....Transparent with guard
R ....Metal with Pyrex liquid level indicator

Operation

C ....Oil-Fog
M ...Micro-Fog

Drain

M ...Manual
E.....No drain (Closed bowl)
Q ....Manual 1/4 turn
R ....Remote fill

A

B

C

48

32

47

Current Plastic Bowl

18

31

30

29

43

44

46

45

36

38

37

39

33

35
34

56

54

58

59

67

66

72

73

70

74

63

69

71

65

68

64

62

55

57

1

2

9

53

3

4

5

9

6

8

7

22

24

23

25

19

21
20

61

60

Early Plastic Bowl
and Guard.
No Longer Available 
Replaced by  Item 18

L64C, L64M - Lubricator

Installation & Maintenance Instructions

IM-240.400 

(

7

/

99)

Our policy is one of continued research and development. We therefore reserve the right to amend, without notice,

 

the specifications given in this document. © 

1999 

Norgren, Inc.

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