Flowserve CPXV fitted with WW - Manual (Page 7)

CPXV - WW/CW USER INSTRUCTIONS ENGLISH 85392698 10-09
Page 7 of 36 flowserve.com
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 soleplate on a special ATEX
marking plate.
0518 II 1/2 GD c 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)
Gas Group (Equipment Group II only)
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 soleplate and 2 or 3
above the soleplate.
For ATEX Group II Category 1 below the soleplate 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. These are based
on an ambient in the range of –80 to +55 ºC (-112 to
131 ºF); refer to Flowserve for ambient temperatures
outside this range for this product.
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 in the table that follows.
The temperature rise at the seals and bearings and
due to the minimum permitted flow rate is taken into
account in the temperatures stated.
Temperature
class to
EN 13463-1
Maximum
surface
temperature
permitted
Temperature limit of liquid
handled (* depending on
material and construction
variant - check which is lower)
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)
Consult Flowserve
Consult Flowserve
115 °C (239 °F) *
180 °C (356 °F) *
275 °C (527 °F) *
400 °C (752 °F) *
The responsibility for compliance with the specified
maximum liquid temperature is with the plant
operator.
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.