Operation; Setting The Seal Adjuster - GEM 673P9 Series Installation, Operating And Maintenance Instructions

10.2

Operation

Optical position indicator:
Diaphragm size 8
Valve open
Diaphragm size 10
Valve open
Diaphragm sizes 25 - 50
Valve open
CAUTION
Handwheel can become hot
during operation!
® Risk of burns!
Ensure protective gloves
G
are worn when operating
handwheel.
CAUTION
Rising handwheel!
® Danger of crushing fi ngers.
Valve closed
Valve closed
Valve closed
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10.3

Setting the seal adjuster

Important:
Only set the seal adjuster when
the valve is completely assembled
(with diaphragm and valve body)
and in a cold condition!
The valves type GEMÜ 673P9 have a
mechanical seal adjuster as standard to
protect the sealing diaphragm.
Standard setting:
The valve is sealed when the handwheel is
completely closed (turned fully clockwise).
Setting the seal adjuster:
Procedure:
1. Open the valve approx. 50 %.
2. Unscrew special screw 6.
6
Diaphragm
size 8
Diaphragm sizes 25- 50
6
Diaphragm size 10
6
673P9