Sera 620.10 - 14 Changing the Diaphragm; General

Diaphragm Relief Valve
Operating Instructions
TA
48
Rev.
13
en
05/2016
Subject to technical modifications!
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15
14 Changing the diaphragm
14.1 General
In case of maintenance- and repair work on the diaphragm
relief valve the safety- and warning notes in Chapter 3 are to
be observed.
Pay attention to all instructions concerning the handling of the
pumped medium when the diaphragm relief valve is opened.
Observe the EC safety data sheets!
CAUTION !
The diaphragm may only be replaced by authorized and
qualified personnel.
14.2 Changing the diaphragm
• Unscrew the lid
• Measure dimension “T” of the set screw with a caliper
gauge and document in Table 06.
T
Upper edge
- Cover
- Set screw
Fig. 13 Setting
Type
Dimension "T“ (mm)
620.10
622.10
623.10
624.10
625.10
626.10
627.10
Table 06
• Unscrew the set screw
• Remove pressure spring(s)
• Unscrew screws
• Remove cover on the valve body
• Diaphragm is now freely accessible and can be replaced
Lid
O-ring
Set screw
Cover
Pressure springs
Pressure disk
Diaphragm
Valve body
Flow direction
Fig. 14 Diaphragm replacement