Servicing – Flowserve HV 215 User Manual

Page 37

Replacing valve plug seal

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Servicing

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Remove gasket

6.To remove the valve head proceed as follows:

See drawing on page 38
. Secure the preloaded compression spring

f. For this purpose you can use a device (not scope of the supply)

that bears the load of the spring by means of leverage so that the 6 hexagon-head cap screws can be safely

loosened.

2. Then unscrew the six hexagon-head cap screws

1 with the locking washer 2 out of the stay bolt 4.

Take the valve plug

e together with the spring plate 3 and the compression spring f out of

the seat flange.

3. Then remove the retaining ring

h and the washer g.

4. Unscrew the four socket-head cap screws

i, take out the washer j and remove the valve plug seal .

Carefully clean all removed and dismantled parts.

Any use of naked flames is expressly forbidden!
Before performing any service work inside the tank make sure that the tank is sufficiently
ventilated and all gases have been completely vented. The rules concerning MAC (= maximum
allowable concentration) values at place of work must be strictly applied!
Note that an inadequately secured compression spring can lead to parts flying around, causing
serious injuries.

Warning

To mount the valve head proceed in reverse order of the removing procedure:
See drawing further down
. Put the valve plug seal onto to valve plug

e and screw in the four socket-head cap screws i together

with the washer

j, applying a torque of 5 Nm. Apply a commercially available lubricant to the screws

and tighten them in several steps in diagonally opposite pairs.

2. Then secure the washer

g by using the retaining ring h.

3. Screw the six hexagon-head cap screws

1 together with the locking washers 2 into the stay bolts 3,

using a torque of 25 Nm. Apply a commerically available lubricant to the screws and tighten them in several

steps in diagonally opposite pairs.

To mount the bottom valves from the outside follow the instructions given in section “Installation” (see page 7 for
HWV 205/ - DN 80 and page 20 for HWV 25/ - DN 80).

Attention

The specified torques must be strictly observed.