MINIPACK
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11
1.3.4 EXPANSION, CONTROL and HYDRAULIC ACCUMULATOR VESSELS
D
H
DN
60 - 500 Litre
Fig 1.3 typical expansion vessel dimensions
Type (stockcode MTH-)
300060 300100 300200 300300 300500 700100 700200 700300 700500
Nominal Content –litres
60 100 200 300 500 100 200 300 500
D mm
409 480 634 634 740 450 485 485 600
H mm
740 840 980 1280 1485 850 1400 1965 2065
Water Connection DN BSP
1”
1”
1 ¼”
1 ¼”
1 ¼”
1”
1 ½”
1 ½”
1 ½”
Weight Kg
25 32 50 55 85 18 49 60 90
Max. working Pressure-bar
10 10 10 10 10 10 10 10 10
Max. Continuous
temperature deg. C
70 70 70 70 70 100 100 100 100
All vessels must be securely mounted to prevent any movement from imposing strain on the attached pipework.
Vessels of 60 litres capacity or greater MUST be mounted vertically on the integral legs with water connection
lowermost.
Set up the vessel so the air charge filling valve (top) and the diaphragm (bottom on 70°C vessels, top on 100°C vessels)
are accessible for future maintenance. All vessels must have isolating and drain off valves fitted to enable them to be
serviced. The connecting pipework should be removable to give access for replacing the diaphragm and should be the
same size as the vessel connection to minimise friction losses. Note: if using a flexible hose it must be suitable for the
temperature of the system.
Fig. 1.4a & b Isolation valve on system pipework & Flexible hose with drain cock on vessel
Set the air cushion pre-charge pressure (see 2.4.2 Maintenance Procedure for details) to the correct level, dependent
on the application required for the vessel. Refer to the Operating parameters at the back of this manual or Aquatech-
Pressmain for advice.
Caution: If the air cushion pre-charge pressure required exceeds 4.0 Bar then you must follow the procedure shown in
section 2.4 to avoid damaging/rupture of the internal diaphragm and consequences of. E.g. High and/or low pressure
problems, unstable pump operation.
