Flowserve Mark 3 - Manual (Page 11)

USER INSTRUCTIONS MARK 3 High Silicon Iron ENGLISH 71569249 09-04
®
3.2 Nomenclature
The pump size will be engraved on the nameplate
typically as below:
2 K 3 X 1.5 H - 10 /9.5 OP
• Frame size
“2" indicates a medium size pump frame (in this
example, a Group 2)
1 = Group 1 (small frame)
2 = Group 2 (medium frame)
3 = Group 3 (large frame)
• Power end
K = Mark 3 style power end
Mark 3A – Standard
ANSI 3A – Optional (3 year guarantee)
• “3” = nominal suction port size (in.)
• “1.5”
= Nominal discharge port size (in.)
• Modifier for “specialty pumps”
H = High Silicon Iron
Blank or no letter = standard pump
M = Sealmatic
R = recessed impeller
US = unitized self-priming
V = vertical In-Line
LF = Lo-Flo
• Nominal maximum impeller diameter. “10” = 10 in.
• Pump design variation
A = This pump has been redesigned from an earlier
version. The impeller and casing are no longer
interchangeable with the earlier version.
H = This pump is designed for a higher flow capacity
than another pump with the same basic
designation. (Examples: 4X3-10 and 4X3-10H;
6X4-10 and 6X4-10H; 10X8-16 and 10X8-16H.
HH = This pump is designed for a higher head than
another pump with the same basic designation.
(Example: 4X3-13 and 4X3-13HH.)
• Actual impeller size
“9.5” = 9 ½ in. diameter; 8.13 = 8 ⅛ in;
10.75 = 10 ¾ in
(Previous annotation: 124 = 12
4
/
8
or 12 ½ in.
diameter; 83 = 8 ⅜ in.)
• Impeller style
RV = reverse vane impeller; OP = Open impeller
3.3 Design of major parts
3.3.1 Pump casing
The seal chamber is cast integral to the casing volute
and only the discharge connection is integral to the
casing. The casing must be installed prior to the
impeller.
3.3.2 Split Gland Yoke
The seal chamber is cast integral to the casing
volute. The gland yoke is clamped around the seal
chamber neck. The gland yoke allows for seal
chamber taps and provides the bolting ring for the
gland.
3.3.3 Impeller
The impeller is open type design.
3.3.4 Suction Cover
The front cover plate encapsulates the impeller and
contains the suction connection.
3.3.5 Shaft/sleeve
Solid and sleeved shafts are available, supported on
bearings, threaded impeller end and keyed drive end.
3.3.6 Pump bearings and lubrication
Ball bearings are fitted as standard and may be either
oil or grease lubricated.
3.3.7 Bearing housing
Large oil bath reservoir.
3.3.8 Shaft seal
The mechanical seal(s), attached to the pump shaft,
seals the pumped liquid from the environment. Gland
packing may be fitted as an option.
3.3.9 Driver
The driver is normally an electric motor. Different drive
configurations may be fitted such as internal combustion
engines, turbines, hydraulic motors etc driving via
couplings, belts, gearboxes, drive shafts etc.
3.3.10 Accessories
Accessories may be fitted when specified by the
customer.
3.4 Performance and operation limits
This product has been selected to meet the
specification of your purchase order. See section 1.5.
The following data is included as additional information
to help with your installation. It is typical, and factors
such as liquid being pumped, temperature, material of
construction, and seal type may influence this data. If
required, a definitive statement for your application can
be obtained from Flowserve.
3.4.1 Alloy cross reference chart
Figure 3-2 is the Alloy cross-reference chart for all
Mark 3 pumps. E3042 is the material code for High
Silicon Iron Pump wet ends.
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