Flowserve MF User Manual

Page 36

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MF USER INSTRUCTIONS ENGLISH 71569191 12/04

Page 36 of 50

®

6.1.8.1 Stuffing Box Data

All dimensions in mm (In.)

Brg.

Frame
Size

(1)

O.D.

Sleeve

(2)

I.D.

Box

Depth

of Box

Packing

Size

No.

Rings

Seal

Cage

Width

Gland

Stud Size

Qty.

Studs

Stud
DBC

Distance

to First

Obstruction

3A

4A

4T

5A

5T

6A

7A

44

(1.73)

54

(2.12)

54

(2.12)

70

(2.75)

70

(2.75)

89

(3.50)

114

(4.50)

63

(2.50)

73

(2.87)

73

(2.87)

95

(3.75)

95

(3.75)

114

(4.50)

140

(5.50)

72

(2.83)

72

(2.83)

72

(2.83)

95

(3.75)

95

(3.75)

95

(3.75)

89

(3.75)

9.7

(0.38)

9.7

(0.38)

9.7

(0.38)

13

(0.50)

13

(0.50)

13

(0.50)

13

(0.50)

5

5

5

5

5

5

5

19

(0.75)

19

(0.75)

19

(0.75)

25

(1.00)

25

(1.00)

25

(1.00)

25

(1.00)

1/2-13NC

1/2-13NC

1/2-13NC

5/8-11NC

5/8-11NC

5/8-11NC

5/8-11NC

2

2

2

2

2

2

2

110

(4.33)

130

(5.12)

130

(5.12)

155

(6.10)

155

(6.10)

175

(6.89)

200

(7.88)

57

(2.25)

65

(2.56)

70

(2.75)

76

(3.00)

86

(3.38)

59

(2.32)

66

(2.59)

(1)

O.D. Sleeve tolerance is +0.00 mm/-0.13 mm (+0.000 in. /-0.005 in.) for all frames except 4T and 5T that

are + 0.00 mm/-0.05 in. (+0.000 mm/-0.002 in.)

(2)

I.D. Box tolerance is +0.00 mm/-0.13 mm (+0.000 in. /-0 .005 in.) for all frames except 4T and 5T which are + 0.05 mm/-0.00 mm

(+0.002 in./-0.000 in.)

6.1.9 Maintenance of mechanical seal

The following instruction, if adhered to, will help to

ensure a long trouble free service life for the

mechanical seal.

Most seals can be installed in a standard stuffing

box, therefore in an emergency, packing with the

addition of a seal cage and packing gland may be

utilized. Compare your seal installation drawing to

the stuffing box data provided in section 6.1.8.1

6.1.9.1 General instructions

a) Be sure to read all seal instructions before

installing the seal.

b) A mechanical seal is a precision product. To

ensure satisfactory operation, exercise extreme

care to avoid scratching or marring the lapped

seal faces.

Rotary to stationary seal faces are

lapped to within millionths of an inch in flatness. It is

therefore important to avoid grasping the rotary seal

and compressing it against the spring, which due to

uneven loading, may cause excessive seal face
distortion and leakage upon installation

.

6.1.9.2 Preparing the pump

a) After assembling the bearing frame, shaft sleeve

and stuffing box, check the concentricity between

the bore of stuffing box and shaft sleeve. The

concentricity should not exceed the Seal

Manufacture's tolerances. Also check the sleeve

diameter and stuffing box bore dimensions to see

that they agree with those shown on seal

installation drawing.

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