2 Safety
9 of 72
Sewatec (60 Hz)
▪
Observe the limits for continuous duty specified in the data sheet or product
literature (Q
min
and Q
max
) (to prevent damage such as shaft fracture, bearing
failure, mechanical seal damage, etc).
▪
When untreated waste water is handled, the duty points in continuous operation
lie within 0.7 to 1.2 × Q
opt
to minimize the risk of clogging/hardening.
▪
Avoid duty points for continuous operation at very low speeds and small flow
rates (< 0.7 x Q
opt
).
▪
Observe the minimum flow rates and maximum flow rates indicated in the data
sheet or product literature (to prevent overheating, mechanical seal damage,
cavitation damage, bearing damage, etc).
▪
Do not throttle the flow rate on the suction side of the pump set (to prevent
cavitation damage).
▪
Consult the manufacturer about any use or mode of operation not described in
the data sheet or product literature.
▪
Only use the respective impeller types in combination with the fluids described
below.
Free-flow impeller
(impeller type F/F-max)
Closed single-channel impeller
(impeller type E/E-max)
Open, diagonal single-vane impeller
(impeller type D)
Closed multi-channel impeller
(impeller type K/K-max)
Prevention of foreseeable misuse
▪
Observe the minimum flow velocities required to fully open the swing check
valves to prevent the reduction of pressure and risk of clogging.
(Contact the manufacturer for the required minimum flow velocities/loss
coefficients.)
▪
Never exceed the permissible operating limits and use limits specified in the data
sheet or product literature regarding pressure, temperature, etc.
▪
Observe all safety information and instructions in this manual.
2.4 Personnel qualification and personnel training
All personnel involved must be fully qualified to transport, install, operate, maintain
and inspect the machinery this manual refers to.
The responsibilities, competence and supervision of all personnel involved in
transport, installation, operation, maintenance and inspection must be clearly
defined by the operator.
Deficits in knowledge must be rectified by sufficiently trained specialist personnel
training and instructing the personnel who will carry out the respective tasks. If
required, the operator can commission the manufacturer/supplier to train the
personnel.
Training on the pump (set) must always be supervised by technical specialist
personnel.
