Operating manual X9 Series metering pumps
File: UT-4336 – Rev.0 Copyright © - OBL Metering pumps - All rights reserved Page 23
GB
h) the liquid to be dosed has not solidified or frozen in pipelines
i) that is protected from agents such as: sand, corrosive substances, dust and/or fibre, water, mechanical stress and vibrations
j) that is protected mechanically: indoor installation or outdoor installation considering the damaging effects of weathering, the
combined influence of temperature, humidity and condensation
6.7.2
Checks during operation
Once the pump has been started, make sure that operating conditions remain within prescribed limits, in particular check the following:
a) pump working pressure
b) motor current absorption
c) handled fluid temperature, if different from ambient temperature
d) warming fluid temperature, for pumps with warming jacket (code RF)
e) efficiency of the cooling system, for pumps with flushing (code TLL, TLF, HT)
f) the entire pump maximum surface temperature (max 40°C for pump reduction gear unit and max 80°C for motor)
Check that pump suitability is maintained whenever changes in operating conditions occur, such as:
- modification of one or more process variables (e.g. working pressure and/or pump flow rate adjustment)
- movement of the pump to a different environment (e.g. from indoors to outdoors)
- dosing of a different fluid from the initial (change of the pump use)
- movement of the pump from a low temperature ambient to another with higher temperature
- change of season or significant climatic variations
- malfunction of possible external safety valve installed on discharge pipeline
6.7.3
Abnormal conditions
Pump must be used exclusively for operating conditions determined at time of order. In case of
abnormal operating conditions (high motor absorption, excessive surface temperature, high noise and/or vibrations)
promptly inform the maintenance staff/manager.
NO RESPONSABILITY IS ACCEPTED FOR DAMAGE OR INJURIES CAUSED BY DEGENERATION OF
MALFUNCTIONS NOT IMMEDIATELY RESOLVED OR REPORTED TO OBL.
6.7.4
Prolonged stops
If a prolonged period of pump stop is foreseen, take the following measures to preserve pump integrity: Cleaning of chemicals,
protection from weathering, etc. (see also "General and surface cleaning").
7. ROUTINE MAINTENANCE
Each pump is a reliable, quality product, subjected to a thorough final inspection. In case of malfunction, although pump is installed
correctly and operating according to the instructions, do not improvise and immediately contact OBL customer service.
These maintenance suggestions are not intended as "do-it-yourself" repairs. To perform such works,
specialised technical knowledge is required and operations are to be performed by qualified personnel.
Interventions on electrical circuits or equipment must only be performed by qualified electricians or, under
supervision, by appropriately trained personnel and in accordance with applicable electrical codes.
In case of ATEX pumps, it is necessary pay particular attention not compromise the pumps suitability
characteristics to the plant classified area where it is installed.
7.1 OPERATING PRECAUTIONS
All operations must be performed by qualified personnel.
Works on the pump have to be performed after the safety supervisor authorisation, after having verified that:
a) the power line is disconnected and no parts are energized, including any auxiliaries
b) any risk of accidental restart has been excluded
c) handled fluid, present in the pumphead and pipelines, is not pressurized or chemically dangerous
d) with pump switched off, that the ON-OFF valves on the suction and discharge pipelines are closed
e) pump has been adequately cleaned, when operating in environments exposed to aggressive chemicals
To Next Page
Loading...
Need help?
General
