Size in
Litres
Product
Code
A B C D
Max
working
pressure
Tested
to
3.5
DP 3.5 265 275 730 165 14 bar 21 bar
5
DP 5 265 355 810 165 14 bar 21 bar
6
DP 6 265 395 860 165 14 bar 21 bar
10
DP 10 320 395 865 220 10 bar 21 bar
11
DP 11 320 395 865 220 10 bar 21 bar
13.5
DP 13.5 320 490 920 220 10 bar 21 bar
15
DP 15 320 570 1022 220 10 bar 21 bar
16
DP 16 320 570 1022 220 10 bar 21 bar
18
DP 18 320 685 1142 220 10 bar 21 bar
20
DP 20 320 685 1142 220 10 bar 21 bar
25
DP 25 377 585 1040 275 8 bar 21 bar
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • United Kingdom
Tel: +44 (0)1584 878500 • Email: supaflex@interflex.co.uk
CHEMICAL DOSING
POTS
Introduction
Installation
Dosing pots are required in order to
feed liquid chemicals such as corrosion
inhibitors into closed systems.
The dosing pots consist of a stainless
steel vessel with inlet (return) and
outlet (flow) valves, a drain valve and
a filling valve.
A stainless steel tundish, air release
valve, wall mounting brackets and a
non-return valve.
It is important that the dosing pots are
fitted correctly in to the system to allow
rapid chemical feed. This is best achieved
by connecting across the main flow and
return pipe work. Ideally the flow
connection should be made on to the
bottom of the dosing pot (valve C), and
the return the top (valve B).
The dosing pot is designed for the
conditions stated on the name plate, the
system into which the dosing pot is
installed should have adequate protection
to ensure the dosing pot is operated
within these limits at all times.
Operation
•
Isolate pot: close all valves
• Drain pot: open valves A and D
•
Charge pot: close valve D and introduce solution via valve A (tundish)
•
Expel air: open air vent until solution appears
• Inject treatment: close valve A fully and open valves B and C.
• The dosing pot may reach temperatures up to 120 degrees Centigrade.
• Protection or warnings should be applied to ensure that personnel do not come into
contact with the pot so as to avoid burns.
• A check valve is installed to prevent accidental scolding and chemical saturation (blow
back) of personnel operating the dosing pot.
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • United Kingdom
Tel: +44 (0)1584 878500 • Email: supaflex@interflex.co.uk
CHEMICAL DOSING
POTS
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • United Kingdom
Tel: +44 (0)1584 878500 • Email: supaflex@interflex.co.uk
(D)
CHEMICAL DOSING
POTS
Maintenance
After long-term use the valves may
require replacement. No corrosion is
allowed for due to the stainless steel
construction.
Specification
• Stainless steel shell.
• Valve size : 25mm BSP female for all dosing pots.
• Welded to BSEN 287.
•
All dosing pots that are designed to PD5500:2009 category 3 (CE marked) have
the following Max. Working pressures :
- 3
.5 litres to 6 litres inclusive : 14 Bar
- 1
0 litre to 20 litres inclusive : 10 Bar
- 25 litres
: 8 Bar
•
Dosing pots that are not designed to the above are available which have maximum
working pressure of 14 bar throughout the range (3.5 litre to 25 litre).
•
Matt stainless steel finish.
CHEMICAL DOSING
POTS
Heating and/or Cooling System Dosing Pot
Information to be provided to building owners and operators :
• The heating (or cooling) system in this building has a chemical dosing pot
installed.
• This appliance manually injects chemicals into the system.
•
Post hand-over risks :
- En
sure the drain valve is closed prior to filling with chemicals.
• Rec
ords of commissioning.
•
Operation and Maintenance hazards.
•
Planned Maintenance :
- T
urn handles on valves once a year.
- V
isually inspect for corrosion.
•
Operation and Maintenance labour resources :
Only use suitably qualified persons who have read the operating and
maintenance instructions.
•
Moth-balling the plant and start-up afterwards :
- D
rain the dosing pot, open the drain valve and close all other valves.
- Start up, flush with clean water.
•
Hazardous information :
- T
he awareness of the chemicals used in dosing the appliance.
- The dosing pot may reach high temperatures during operation.
Interflex Hose & Bellows Ltd. • www.interflex.co.uk
Ludlow Eco Park • Ludlow • Shropshire • SY8 1FF • United Kingdom
Tel: +44 (0)1584 878500 • Email: supaflex@interflex.co.uk
CHEMICAL DOSING
POTS
