For cylindro-conical tanks the special compact design and
central location of the tank top system provides an efficient
and economic way of mounting anti vacuum / pressure relief
safety valves, CIP supply with cleaning head, pressure control
etc., in a single assembly.
The topplate assembly is designed and sized individually to
suit tank application, process specification, and special
requirements. It is based on tank size, max. working pressure,
and cleaning procedure.
A typical topplate assembly will include a combination of the
Anti vacuum valve:
The valve protects the tank from implosion
during CIP or emptying. Sizing will depend on tank
design data, cleaning procedure, and process requirements.
Pressure relief valve:
This valve protects the tank from overpressure and overfilling. Sizing
of the valve will depend on
tank design data and process requirements.
Regulation of the tank top pressure can be
carried out in the traditional way by means of a bunging
device connected to the CIP/gas pipe. Another possibility to
be recommended is a remote controlled Pressure Exhaust
(PE) valve or a constant pressure system mounted directly on
the topplate assembly.
CIP supply & cleaning head:
The CIP pipe is mounted on
the top flange by means of a union coupling or mounting
flange to enable easy demounting of spray ball or cleaning
machine for inspection and maintenance.
Self-cleaning CO2 valve:
Between the CIP pipe and the top
plate is situated a combined gas escape/supply valve. The
valve is normally open for gas flow out of the tank during filling
and fermentation, and open for gas inlet during pressurising
or emptying. During CIP the liquid will close the valve but
a special drilling of the valve body ensures cleaning of its seat
and the pipe connection because a small amount flows
through. The main CIP flow will run directly to the cleaning
Simple and safe operation
All parts can be cleaned in place
Centralized placing of tank equipment secures easy
Better and lower tank insulation costs
Low installation costs
High level probe: The probe will give a signal when max. filling
height in tank is obtained and is a useful security against
overfilling. The use of either spray balls or rotating cleaning
machines should be taken into account when selecting the
type of probe. Sight glass & light fitting: Available as individual or
combined units. Pressure transmitter: Can also be used for level
indication. Bursting disc, heating element, lifting lugs, sensors: Or
other equipment as per customer requirements.
Please read detailed information on the separate PD leaflet
for the components included.
The topplate assembly is mounted with a joint on to a counter
flange directly welded into the top of the tank.
All components are fully cleanable in place.
Periodic external manual cleaning and test of all functions.
Maintenance instructions for individual equipment must be
The topplate assembly can be removed and the hole used for
inspection of the tank, making a separate manhole superfluous.
Standard designs for fermenting vessels, storage vessels and
BBTs are supplied with an assessment for pressure equipment
(PED). Other designs on request.
Weather cowl for protection of equipment.