DRYDEN AQUA 90022 운영 매뉴얼 - 페이지 6

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7. Installation

6.1. Replacing the flapper & indicator assembly in

1.5"(DN40) 2" (DN50) and 2.5" (DN65) installations

For the FlowVis Digital (FV-D) to function on FlowVis

models DN40, DN50, and DN65, it will be necessary to

replace the Flapper and its attached red indicator with

the one provided in the FlowVis digital (FV-D ) packing

box (see Fig.1.4 on page 4) - regardless of whether the

FlowVis unit itself is new or already installed. This is a

simple procedure that will take less than 2 minutes;

however, it is important to reassemble the unit exactly

as shown below.

Procedure:

Release each of the two spring legs from the location tabs - this will

remove the tension from the spring. See Fig.2.3 above.

Slide the Hasteloy pivot pin to completely remove it from the lid.

Discard the existing gray Flapper with its attached red indicator.

Pay attention to the orientation of the spring when reassembling the unit.

Install the new Flapper and Indicator following a reversal of the

disassembly procedure. Note, you may find it easier to place the spring's

legs over their location tabs before sliding the pin.

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Fig 2.3

Spring legs location tabs