The document specifies requirements for a portable submersible pump that will be used to extract water samples from groundwater observation wells that are up to 90m deep. The pump must be able to reliably operate under environmental conditions, have a lifetime of at least 10 years, and be easy to use and maintain. It must be capable of both high purging rates to flush stagnant water as well as low sampling rates below 0.1 L/min. The pump will come with different capacity options and accessories for effective long-term operation.

1. 10.03
9
SUBMERSIBLE SAMPLING PUMP,
2” PORTABLE
Approval Date: 28 July 2009
Version: 2
Purpose
The portable submersible pump will be used to extract water quality samples from
ground water observation wells. The wells in the Hydrology Project have a depth up to
90 m and have an inner diameter of 100 mm or more.
Conditions & Requirements
 The submersible pump shall be of such a design that it operates reliably and
effectively under the prevailing environmental and operational conditions.
 The submersible pump shall be of a special design dedicated to pumping and
sampling of ground water for water quality monitoring.
 All materials on the pump exterior shall be non-construction.
 The electrical connections shall be of a reliable and robust construction.
 The pump shall have an expected technical lifetime of not less than 10 years.
 The pump shall be easy to operate and maintain.
 The pump shall be delivered with Discharge vs. Lift Head relation data in table.
 The effects of power supply, voltage and frequency on the Discharge vs. Lift
Head relationship shall be made available.
 The pump shall be of sound design and construction in order to guarantee many
years of trouble free and low maintenance use.
 The pump shall be supplied with the accessories as needed for effective
operation for 5 years.
 An appropriate tool-set for maintenance shall be at least included in the delivery.
 The pump shall be capable of operating for at least 6 month without any
servicing.
 Operator’s and maintenance manuals, related to the type and model of the pump
and accessories, shall be part of the delivery.
 The sampling pump should have high purging capacity so that stagnant water is
not collected.
 The pump should have low flow sampling rate so that chemical and physical
conditions are not changed. It is preferred to have 100 ml/min discharge rate.
 The pressure of the pumps should be constant and there should not be sudden
pressure change to cause degassing.
 The pump design will not be required to support pumping of concentrated oils,
chemicals or explosive liquids.
 The pump should work effectively down to 90m depth
Equipment Specification: SUBMERSIBLE SAMPLING PUMP, 2” PORTABLE Version 2 10.039-1/4

2. General Specifications
To allow sampling without causing volatilization or oxidation of the sample the
submersible pump shall be of the following type:
 Foot valve
 Centrifugal
 Plunger (piston)
 Diaphragm (bladder)
The pump may use electric power source to lift the water from the well with following
specifications:
Electrical centrifugal pump set: Generator, frequency converter, motor-pump
assembly, power cable, delivery tubes and a tube reel.
o All electrical components of the pump set shall meet international safety
regulation IEC 60364 or compatible Indian standards.
o Compressed air shall never be in direct contact with the water to be sampled, it
should only be used to operate e.g. a plunger or a bladder type submersible
pump.
To cover the variety of wells and water levels in a monitoring programme three sets of
pumps with different capacities are recommended. These sets are referred to as
capacity I, II and III. They match the requirements for purging/sampling of 30, 50 and 90
m deep wells respectively, see Table 1: Pump capacity categories I, II and III.
The following specifications apply for the submerged and above ground parts.
1. Submerged parts (motor and pump assemble)
Dimensions Maximum outer diameter is 60 mm (2.4 inch)
Length less than 0.4 m.
Mass Approximately 1 to 5 kg, sufficient to allow easy lowering and
lifting
Operating temperature0 to 40 0
C water temperature
Materials Corrosion proof
Ingress protection Protection for permanent immersion in water at a maximum
depth of 90 m (IP 68).
2. Above ground parts
Dimension & weight truly portable
Operating temperature0 to 50 0
C
Humidity 100%
Ingress protection IP 64 protected against water sprayed all directions.
Equipment Specification: SUBMERSIBLE SAMPLING PUMP, 2” PORTABLE Version 2 10.039-2/4

3. Component Specifications of the pump-set
Component specifications only apply as relevant for the concerning pump set. All
components in a set must be compatible and adjuster to each other in such a way that
the total closely fits the demands for discharge and lift head as specified in Paragraph 6:
Discharge and Lift Head. An over-dimension pump (too heavy and too powerful for the
each component of a pump-set shall comply with the general demands as specified in
the General Requirements).
During the purging operation, the pump-set shall, provide the operator with information
to allow assessment of the total purged volume.
1. Motor-pump
 Pump and motor assembly shall be united in a single enclosure.
 The motor shall be protected against water contact during long immersions
(IP68, up to 90 m).
 Part in contact with sample and well water shall be constructed of chemically
inert and corrosion proof material: e.g. stainless steel (AISI 316), Titanium, PTEE
(Teflon), P.E.
 The heat production of the pump, whatever the load, shall not cause more then
0.5 0
C temperature rise of the sampled water.
 Pumps shall have in-built protection against overheating and effects of dry-
running.
2. Generator
 Air cooled petrol engine.
 Output 230 V, 50 Hz, single phase.
 Ample capacity as required by the pump with at least 25% overload capacity.
Estimations for pump are given in Paragraph 6: Discharge and Lift Head.
 Sum of length, width and height less than 155 cm
 Dry mass less than 50 kg.
 Fuel consumption better or equal than 0.4 kg/(kWh)
 Fuel tank for at least 2 hours of continuous full load operation.
 Manual starting.
 Exhaust silencer with muffler.
 Bad weather protection (complying with IP 64 or better).
 Accessories: a barrow to ease transportation in the filled, voltmeter, frequency
indicator, load indicator.
 Spares fuel filter, spark plug, oil filter, engine oil, fuses etc.
3. Frequency converter
 The frequency converter and concomitant electrical pump shall be dimensioned
to meet discharge and lift head as specified in paragraph 6: Discharge and Lift
Head.
 230 V, single phase.
 Continuous variable frequency.
Equipment Specification: SUBMERSIBLE SAMPLING PUMP, 2” PORTABLE Version 2 10.039-3/4

4.  Built in protection to prevent for over current (e.g. fuse that than can be rest).
 IP21 and IP23 for cable and plug
4. Tubes, cable and suspension wire
 Parts that come into contact with the sample and well water must be mad of
chemically inert and corrosion proof material: e.g. stainless steel (AISI 316),
titanium, PTFE (Teflon), P.E.
 Flexible handling and winding and winding up cables, tubes and wires:
 The cable length shall be sufficient to suspend the pump to a depth of at least 1
m below the lowest dynamic water level anticipated during purging. For example,
for the sets under I, II and III respectively the cable length may be set at 30, 50
and 90 m.
 A detachable with watertight connector is recommendation as it gives more
operational, flexibility. The watertight connector allows for swift cable exchange,
e.g. in case of damage or to hook on other cable lengths.
5. Discharge and Lift Head
 Discharge shall be continuously (as opposed to sets wise) variable in the
discharge range required during purging.
 Table 1 below gives the minimum requirement for each of the three pump sets
based on the requirement that 4 times initial volume of a 100 mm diameter must
be purged within 30 minutes.
Table 1: Pump capacity categories I, II and III
Capacity I Capacity II Capacity III
Well depth 30 m 50 m 100 m
Dynamic lift head range 10 to 25
m
range 25 to 45
m
range 45 to 85
m
Discharge for purging at xx m lift
head
15 L/min at 20
m 25 L/min at
10 m
10 L/min at 45
m 30 L/min at
25 m
10 L/min at 85
m 50 L/min at
50 m
Discharge for sampling < 0.1 L/min < 0.1 L/min < 0.1 L/min
Estimated pump power
requirement
100 W 200 W 600 W
Accessories
Water level indicator Gives a clearly audible and/or visible signal when the pump
touches the water
Service and repair kit Comprising tools and spares for repairs and replacements
in the field
Support Designed to ease handling and to protect electrical parts
like frequency converter and compressor against dust
and moisture on the ground
Environmental protectionVulnerable parts like generator set, compressor and
frequency converter have to be environmentally protected
Equipment Specification: SUBMERSIBLE SAMPLING PUMP, 2” PORTABLE Version 2 10.039-4/4