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Application areas
Tamper-proof valve for connection,
maintenance and inspection of diaphragm
expansion vessels in expansion lines of heating
systems and solar systems with a maximum
concentration of 50 % glycol in the water.
Application
Suitable for the installation in closed heating
systems as per DIN EN 12828.
"Shut-off devices must be sufficiently
secured against inadvertent closing (e.g.
tamper-proof valve with wire and lead seal)."
For shutting off expansion tanks from
heating systems for maintenance work
under consideration of DIN EN 13831.
"Expansion tanks with diaphragms must be
arranged in such a way that the maximum
permanent temperature of 70 °C required by
DIN EN 13831 cannot be exceeded or can
only be exceeded for a short period of time."
Specifications
Operating temperature range:
Operating pressure:
Emptying rate:
Mounting information
The tamper-proof valve (3) is installed in the
expansion pipe upstream of the diaphragm
expansion tank (1) according to
DIN EN 12828.
Mount the connection screw (2) tightly to the
connection piece of the diaphragm
expansion tank and fasten it to the tamper-
proof valve using the enclosed gasket.
After installation, the fully open valve (turned
counter-clockwise all the way to the stop)
must be secured against inadvertent closing
by means of wire and a lead seal.
Procedure for maintenance work at the
expansion tank:
Open the seal and remove the cap (5).
-
Close the "tamper-proof valve" using an
-
Allan key size 6, clockwise all the way to
the stop.
Description
Tamper-proof valve made of brass,
With boiler feed and drain cock
With cap, wire and lead seal
With screw connection for diaphragm
0 - 120 °C
max. 10 bar
kvs: 1,5 m³/h
Open the boiler feed and drain cock
-
(4) at the side and drain the diaphragm
expansion tank.
Perform the required maintenance
-
work at the diaphragm expansion tank
(1).
Close the boiler feed and drain cock
-
when you are done with the
maintenance work.
Open the tamper-proof valve (3) (turn
-
counter-clockwise all the way to the
stop) and secure it with the cap and a
lead seal (5).
connection
G1" with shut-off valve, adjustable with a
size 6 Allan key
expansion tank G1".
1 Diaphragm expansion tank
2 Screw connection
3 Tamper-proof valve
4 Boiler feed and drain cock
5 Cap with lead seal and wire
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