Flowserve CPXV fitted with Mark 3 ASME hydraulics - Manual (Page 7)

CPXV with Mark 3 ASME hydraulics ENGLISH 71569291 12-14
Page 7 of 44
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The pump will then be supplied with a copy of the
Certificate of Approval by a Notified Body and marked
with both categories. Users must pay particular
attention to pump operation and maintenance
instructions because of the hazard of the explosive
atmosphere.
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 is 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 or in the case of Category
1, below the sole plate on a special ATEX marking
plate.
0518 II 1G/2GD cb IIC 135 ºC (T4)
External examination
body
*
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)
b = Control of ignition source
(in accordance with EN13463-6)
Gas Group
IIA – Propane (Typical)
IIB – Ethylene (Typical)
IIC – Hydrogen (Typical)
Maximum surface temperature (Temperature Class)
(see section 1.6.4.3.)
* The external ATEX examination body
reference is included in the pump marking when the
Category is 1/2 or 1/3. In that situation, the 1 before
the /2 or /3 identifies the special case where the
pump is Category 1 below the sole plate and 2 or 3
above the sole plate.
For ATEX Group II Category 1 below the sole plate a
special ATEX marking plate is used. An example of
this is shown below.
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.
The surface temperature on the pump is influenced
by the temperature of the liquid handled. The
maximum permissible liquid temperature depends on
the ATEX temperature class and must not exceed the
values in the table that follows.
Temperature class
to EN 13463-1
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 liquid maximum working temperature
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 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.
Do not attempt to check the direction of rotation with the
coupling element/pins fitted due to the risk of severe
contact between rotating and stationary components.