Emerson Fisher P520L Instruction Manual

Instruction Manual
D450013T012

August 2016

Type P520L Reamer

Type P520L

DRILL MARKS

P2114_1

P2115_1

REAMER TIP

MARKINGS

REAMER TIP
EXTENDS AT
THIS END

Figure 1. Type P520L Reamer

Introduction

The Type P520L tapered reamer is calibrated for propane
vapor by drill size. Refer to the NATIONAL FUEL GAS CODE,
NFPA 54-2006, Table F.1 (b) and Table F.1 (c) for BTU/hour for

a specic orice and gas size. Use Type P520L to enlarge or
clean out orices on LP-Gas appliances ranging from drill size

no. 52 to 30 (0.0635 to 0.125 in.).

Use the reamer as follows:

The reamer is designed with knurls on the handle for better
grip. Make sure reamer is held in vertical position while doing
the following steps.

To enlarge orices:

1. Loosen the reamer by twisting the knurls against the
slide rule.

2. Push the slide rule towards the end of the reamer body

until the cursor points to the desired orice or drill size.

3. Once the cursor is aligned with the desired drill size,
lock position by twisting the knurl in opposite directions.

4. Hold the orice with one hand and the reamer with
the other.

5. Insert the tip of the reamer into the orice as far as it

can go.

6. Start reaming until the orice contacts the end of the
reamer body.

7. Remove the reamer from the orice.

8. Unlock the reamer and retract the slide rule to the fully
closed position.

9. Lock handle.

SLIDE RULE

CURSOR

HANDLE WITH
KNURLS

P2116_1

To check orice sizes:

1. Loosen the reamer.

2. Extend the reamer tip fully.

3. Lock the reamer.

4. Insert the reamer tip into the orice until it sits

quite snugly.

5. Unlock the reamer and allow the handle to drop and

contact the tip of the orice.

6. Lock position.

7. Read the indicated drill size

8. Remove the reamer and retract the slide rule to the fully
closed position.

9. Lock handle.

CAUTION

Always retract the reamer to the
fully closed position and tighten the handle
before placing the reamer into pocket. Failure
to do so may result in personal injury.

This reamer can also be used on appliance orices
where gas other than propane is used. The following
chart shows the BTU Orice Capacity by Gas and Orice

Sizes. (Tables are from NATIONAL FUEL GAS CODE,
NFPA 54-2006, 2006 edition.)

Type P520L

Table F.1 (b). LP-Gases (BTU/hour at Sea Level) Table F.1 (b). LP-Gases (BTU/hour at Sea Level) (continued)

ORIFICE OR DRILL SIZE PROPANE BUTANE

0.008

0.009

0.010

0.011

0.012

80
79
78
77
76

75
74
73
72
71

70
69
68
67
66

65
64
63
62
61

60
59
58
57
56

55
54
53
52
51

50
49
48
47
46

519
656
812
981

1169

1480
1708
2080
2629
3249

3581
4119
4678
5081
5495

6375
6934
7813
8320
8848

9955
10,535
11,125
11,735
12,367

13,008
13,660
14,333
15,026
17,572

21,939
24,630
28,769
32,805
36,531

39,842
43,361
46,983
50,088
53,296

589
744

921
1112
1326

1678
1936
2358
2980
3684

4059
4669
5303
5760
6230

7227
7860
8858
9433

10,031

11,286
11,943
12,612
13,304
14,020

14,747
15,486
16,249
17,035
19,921

24,872
27,922
32,615
37,190
41,414

45,168
49,157
53,263
56,783
60,420

ORIFICE OR DRILL SIZE PROPANE BUTANE

45
44
43
42
41

40
39
38
37
36

35
34
33
32
31

30
29

Notes:

1. BTU per cubic foot

2. Specic gravity

3. Pressure at orice, inches w.c.

4. Orice coefcient

Propane

2516

1.52
11

0.9

54,641
60,229
64,369
71,095
74,924

78,029
80,513
83,721
87,860
92,207

98,312
100,175
103,797
109,385
117,043

134,119
150,366

Butane

3280

2.01
11

0.9

Table F.1 (c). Multipliers for Utility Gases of

Another Specic Gravity

SPECIFIC

GRAVITY

0.45

0.50

0.55

0.60

0.65

0.70

0.75

0.80

0.85

0.90

MULTIPLIER

1.155

1.095

1.045

1.000

0.961

0.926

0.894

0.866

0.840

0.817

SPECIFIC

GRAVITY

0.95

1.00

1.05

1.10

1.15

1.20

1.25

1.30

1.35

1.40

61,944
68,280
72,973
80,599
84,940

88,459
91,215
94,912
99,605

104,532

111,454
113,566
117,672
124,007
132,689

152,046
170,466

MULTIPLIER

0.795

0.775

0.756

0.739

0.722

0.707

0.693

0.679

0.667

0.655

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D450013T012 © 1971, 2016 Emerson Process Management Regulator
Technologies, Inc. All rights reserved. 07/16.
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