Flowserve MP1 Sier-Bath - Manual (Page 7)

MP1 USER INSTRUCTIONS ENGLISH 26999958 – 10-12
Page 7 of 48 flowserve.com
the specific atmosphere in which they are to be
installed.
Where Flowserve has supplied only the bare shaft
pump, the Ex rating applies only to the pump. The
party responsible for assembling the pump set shall
select the coupling, driver and any additional
equipment, with the necessary CE Certificate/
Declaration of Conformity establishing it is suitable for
the area in which it is to be installed.
The output from a variable frequency drive (VFD)
can cause additional heating effects in the motor
and so, for pumps sets with a VFD, the ATEX
Certification for the motor must state that it covers
the situation where electrical supply is from the VFD.
This particular requirement still applies even if the
VFD is in a safe area.
1.6.4.2 Marking
An example of ATEX equipment marking is shown
below. The actual classification of the pump will be
engraved on the nameplate.
II 2 GD c IIC 135 ºC (T4)
Equipment Group
I = Mining
II = Non-mining
Category
2 or M2 = High level protection
3 = normal level of protection
Gas and/or Dust
G = Gas; D= Dust
c = Constructional safety
(In accordance with EN13463-5)
Gas Group
IIA – Propane (typical)
IIB – Ethylene (typical)
IIC – Hydrogen (typical)
Maximum surface temperature (Temperature Class)
(See section 1.6.4.3.)
1.6.4.3 Avoiding excessive surface temperatures
ENSURE THE EQUIPMENT TEMPERATURE
CLASS IS SUITABLE FOR THE HAZARD ZONE
Pumps have a temperature class as stated in the
ATEX Ex rating on the nameplate. These are based
on a maximum ambient of 40°C (104°F); refer to
Flowserve for higher ambient temperatures.
The surface temperature on the pump is influenced
by the temperature of the liquid handled. The
maximum permissible liquid temperature depends
on the temperature class and must not exceed the
values listed in Table 1.
The temperature rise at the seals and bearings and
due to the minimum permitted flow rate is taken into
account in the temperatures stated.
The operator is responsible to ensure that the
specified maximum liquid temperature is not
exceeded.
Table 1 Maximum permitted liquid temperature
for pumps
Temperature
class to
EN13463-1
Maximum surface
temperature
permitted
Temperature limit
of liquid handled
T6
T5
T4
T3
T2
T1 85 °C (185 °F)
100 °C (212 °F)
135 °C (275 °F)
200 °C (392 °F)
300 °C (572 °F)
450 °C (842 °F)
65 °C (149 °F) *
80 °C (176 °F) *
115 °C (239 °F) *
180 °C (356 °F) *
275 °C (527 °F) *
400 °C (752 °F) *
* The table only takes the ATEX temperature class into consideration.
Pump design or material, as well as component design or material, may
further limit the maximum working temperature of the liquid.
The operator is responsible to ensure that the
specified maximum liquid temperature is not
exceeded.
Temperature classification “Tx” is used when the liquid
temperature varies and when the pump is required to
be used in differently classified potentially explosive
atmospheres. In this case the user is responsible for
ensuring that the pump surface temperature does not
exceed that permitted in its actual installed location.
If an explosive atmosphere exists during the
installation, do not attempt to check the direction of
rotation by starting the pump unfilled. Even a short
run time may give a high temperature resulting from
contact
between rotating and stationary
components.
Where there is any risk of the pump being run against
a closed valve generating high liquid and casing
external surface temperatures fit an external surface
temperature protection device.
Avoid mechanical, hydraulic or electrical overload by
using motor overload trips, temperature monitor or a