4. OPTIONS
IOM manual - Sanitary series
36
4.
OPTIONS
4.1.
Valve options
In pump sizes T80 - T425 flap valves and heavy duty ball cup valves are available as an option
to standard ball valves. What is more, T825 pump size can also be configured with flap
valves.
4.1.1.
Flap valves
It is a great option when the product we intend
to pump contains big solids or solids that can be
damaged by valve balls (e.g. fruits).
Flap valves made in AISI 316 are mounted in
special flap valve cup with clamps between
housing and manifold. Pump with flap valves
differ from standard pump by valve type,
manifolds (pos. 131, 132) and pump housing
(pos.11).
IMPORTANT!
Flap valves are not appropriate for pumping water-like products. If a liquid has low viscosity,
the valve will open and close very fast with no shock absorption that is provided by products
with particles. Also dry running of the pump for longer periods will cause rapid valve wear
and eventually pump stopping.
Flap valves are also not recommended for highly viscous liquids. The flap itself has a small
mass compared to a valve ball and might have a problem to overcome the viscous liquid
column in order to close properly on the seat.
For spare parts see chapter 5.
Spare parts
.
