4 installation, 1 location, 2 foundation – Flowserve MENBLOC User Manual
Page 17: 3 piping
MENBLOC USER INSTRUCTIONS ENGLISH 71576296 - 02/13
Page 17 of 40
Equipment operated in hazardous locations
must comply with the relevant explosion protection
regulations. See section 1.6.4, Products used in
potentially explosive atmospheres.
All equipment must be grounded.
The pump should be located to allow room for
access, ventilation, maintenance and inspection
with ample headroom for lifting and should be as
close as practicable to the supply of liquid to be
Sound installation and fixing conditions are
imperative to ensure good running. If these
recommendations are not applied, damage may
occur which will not be taken into account in the
The foundations must be made by a specialized
and competent firm. Ensure that the foundations
are not subjected to vibration from other machines.
The pump motor unit must be installed in a well
ventilated and sheltered area, particularly to avoid
problems of freezing up.
Various possible pump positions are as shown
Never position the motor below the
The unit must be mounted on a plane surface. The
holes in the pump and motor feet allow the unit to
be fixed to the foundation.
In certain cases a shim is
necessary under the unit for example if the motor
flange touches the supporting surface before the
feet do. It is imperative to shim both the pump and
The user must verify that the equipment is
isolated from any external sources of vibration.
Protective covers are fitted to the
pipe connections to prevent foreign bodies
entering during transportation and installation.
Ensure that these covers are removed from the
pump before connecting any pipes.
4.3.1 Suction and discharge piping
The dimensions of the pipes do not directly
depend on discharge diameter of the pump:
a) First, choose a flow velocity < 2 m/s 7 ft/s) at
suction, and about 3 m/s (10 ft/s) at discharge.
b) Take into account the available NPSH which
must be greater than the required NPSH of the
Never use pump as a support for
Do not mount expansion joints in
such a way that their force, due to internal
pressure, may act on the pump flange.
Maximum forces and moments allowed on the
pump flanges vary with the pump size.
Excessive external loads may cause misalignment,
heating of the bearings, vibration and the possible
failure of the pump casing.
Forces and moments applied to the pump flanges
must never exceed the values shown in the