Flowserve BX 150 Manual de usuario descargar pdf (Pagina 6)

37-6

15. Rotate disc several times to allow seat to self-cen-

ter in the body. Again, check packing box nuts to be

certain they are tight, per step number 13. Do not

overtighten.

CAUTION: Do not over tighten packing box

nuts. This can cause excessive packing wear

and high shaft friction, which may impede shaft

rotation.

16. After the valve is fully assembled and seat leak

tested, use a compatible welding rod to tackweld

the taper pin to the disc at its thickest end. Later,

this will allow the taper pin to be removed after the

weld has been ground off.

Remounting Valve to Actuator

Before mounting a Valdisk 150 valve to a Valtek actua-

tor, verify that the disc rotation matches the actuator

rotation and complies with the air failure requirements.

Procedures for mounting the actuator are as follows.

1. Slide the entire actuator assembly onto the shaft.

To ensure full rotation of the disc, marks provided

on the end of the valve shaft and on the actuator

lever arm should be aligned.

2. Bolt the actuator yoke to the valve body. Be certain

the stroke indicator plate is positioned properly to

accurately indicate the valve’s rotation.

3. Adjust the actuator stroke stop bolts until the disc is

parallel to the seat surface.

CAUTION: Actuator stroke stop bolts must be

properly adjusted to prevent the valve disc from

overstroking. If incorrectly adjusted the valve

shaft may be twisted or sheared off.

4. Install the valve in line as outlined in the “Installa-

tion” section.

117

109

113*

114*

Figure 4: Exploded Body Sub-assembly

Item No. Description

1 body

21 seat insert

22 seat retainer

25 retainer O-ring

26 fire-safe gasket**

27 fire-safe seal**

50 disc

51 shaft

52 taper pin

80 gland flange

82 thrust washer

83 shaft bearing

84 shaft bearing

85 packing retainer

87 packing follower

88 packing

109 packing box stud

113 jam nut*

114 washer*

117 packing box nut

* 1 thru 6-inch only

** Fire-safe designs only

1 2 3 4 5 6 7 8

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Flowserve BX 150 Manual de usuario Pagina 6

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