Kessel Staufix Instructions D'installation Et D'utilisation page 13

1.1 Use
The KESSEL backwater valves are inten-
ded for installation in gravity fed wastewa-
ter pipes.
The KESSEL backwater valves must be kept
in good working order at all times and be
easily accessible. The flaps are normally clo-
sed and open automatically to allow outflo-
wing water to pass.
The double and single flap lockable backwa-
ter valves have a manually lockable flap as an
emergency stop. This enables the valve to be
opened and closed manually. If out of opera-
tion for a prolonged period, the emergency
flap should be kept closed.
The single flap backwater valve does not have
the manual locking capability.
Only the double flap lockable backwater valve
meets DIN 1997 and offers additional security
due to the double flaps.
KESSEL
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1.2 Construction
The KESSEL Staufix ® double flap lockable
backwater valve (page 4, pict.
of the body , an insert housing with flap
the „push-fit" housing with flap
cover with hand lever for emergency clo-
sure.
Both single flap backwater valves can be con-
verted to double flap backwater valves in
accordance with DIN 1997 (see Chapter 5).
The KESSEL Staufix ® single flap lockable
backwater valve (page 4, pict. ) consists of
the body , the „push-fit" housing with flap
and the cover with hand lever for emer-
gency closure.
The KESSEL Staufix ® single flap backwater
valve (page 4, pict. 3 ) consists of the main
body , an insert housing with flap
the cover .
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1. General
GB 17