GRUNDFOS INSTRUCTIONS
Rigid Suction Lances RSL
and Foot Valves FV
Installation and operating instructions
2
English (GB) Installation and operating instructions
Caution
Note
Original installation and operating instructions.
CONTENTS
1. Safety instructions
1.1 Symbols used in this document
1.2 Qualification and training of personnel
1.3 Safe operation
1.4 Safety instructions for the operating company/operator
2. Product introduction
2.1 Applications
2.2 Improper operating methods
2.3 Function
2.4 Warranty
2.5 Product description
2.6 Identification
3. Technical data
3.1 Dimensions
4. Installation
4.1 Hydraulic connection
4.2 Electrical connection of level indication
4.3 Container connection
5. Maintenance and service
5.1 Maintenance
5.2 Service
6. Fault finding
7. Disposal
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1.4 Safety instructions for the operating
company/operator
The owner of the system is responsible for training of operating
personnel.
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Warnin g
When working with chemicals, the accident
prevention regulations applicable at the
installation site must be applied.
Observe the chemical manufacturer's safety data
sheets when handling chemicals.
Warnin g
When working on the product, or connections
and lines, always wear protective clothing (e.g.
safety goggles and gloves).
The system must be unpressurised.
Only operate the system if all lines are connected
correctly.
Warnin g
The chemical resistance of the parts that come
into contact with the dosing medium depends on
the medium, media temperature and operating
pressure.
Ensure that all parts in contact with the medium
are resistant to th e med ium un der opera tin g
conditions.
English (GB)
Warning
Prior to installation, read these installation and
operating instructions. Installation and operation
must comply with local regulations and accepted
codes of good practice.
1. Safety instructions
1.1 Symbols used in this document
The safety instructions are identified by the following symbols:
Warning
If these safety instructions are not observed,
it may result in personal injury.
If these safety instructions are not observed,
it may result in malfunction or damage to the
equipment.
Notes or instructions that make the job easier
and ensure safe operation.
1.2 Qualification and training of per sonne l
The personnel responsible for the installation, operation and
service must be appropriately qualified for these tasks.
Areas of responsibility, levels of authority and the supervision of
the personnel must be precisely defined by the operator.
If necessary, the personnel must be trained appropriately.
1.3 Safe operation
If safe operation is no longer possible, the product must be taken
out of operation and secured against unintentional operation.
This is the case in the following situations:
• If the product is visibly damaged.
• If the product no longer seems operational.
• After long periods of storage under unfavourable conditions.
2. Product introduction
2.1 Applications
The foot valve and the rigid suction lance are suitable for the
following applications:
• Extraction of chemicals from unpressurised containers.
• Monitoring the liquid level in the chemical container (versions
with two-step level indication).
Special features:
• Protection of the suction assembly (suction lance).
• Easy handling when exchanging containers.
2.2 Improper operating methods
Warnin g
Improper use, foreseeable misuse or
misapplication can lead to personal injury and
damage to the equipment and is therefore not
permitted.
The operational safety of the product is only guaranteed, if it is
used in accordance with section 2.1 Applications.
The product may not be used for:
• operation in potentially explosive areas
• combustible media
• frozen media
• abrasive or crystallising media.
2.3 Function
• Extracting liquid from a container with a suction line.
• Filtering the liquid to protect the pump from soiling.
• Preventing backflow of liquid by means of a non-return valve.
• Keeping the foot valve upright at the container bottom.
• Indicating a low level of liquid or an empty tank by means of
two reed switches and floaters.
• Connecting an exchangeable container.
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2.4 Warranty
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English (GB)
A warranty claim in accordance with our general terms of sale
and delivery is only valid if these requirements are fulfilled:
• The product is used in accordance with the information within
this manual.
• The product is not dismantled or handled incorrectly.
• Maintenance is carried out by authorised and qualified
personnel.
• Only original spare parts are used for repairs during
maintenance.
Grundfos cannot be held liable for any damage
resulting from incorrect use.
2.5 Product description
Fig. 1 From left to right: suction lance, foot valve with level indication, plastic and stainless-steel foot valve without level indication
Pos. Description
1 Hose connection thread
2 Signal cable with plug
3 Tank connection, slidable
4 Tank cap, slidable
5 Protective tube with hose
6 Floater low-level
7 Valve body with switch unit
8 Floater empty
9 Inlet with strainer
10 Inlet with strainer and weight
11 Connection for hose or pipe
TM04 8524 1212
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2.6 Identification
2.6.1 Type key of suction lances
Code Example RSL - 0500 - 2L - G5/8 PE / V,E / C U2
RSL Rigid Suction Lance
Maximum immersion depth
0400 up to 400 mm
0500 up to 500 mm
0570 up to 570 mm
0690 up to 690 mm
0820 up to 820 mm
0980 up to 980 mm
1100 up to 1100 mm
1200 up to 1200 mm
Level indication
NL Without level indication
2L Two-step level indication (low-level signal, tank-empty signal)
Connection size
G5/8 Male thread G 5/8 with groove for O-Ring on top
Material of enclosure, connection, floater
PE High density polyethylene (HDPE)
PV Polyvinylidenfluoride (PVDF)
Material of O-ring
V,E Fluorocarbon elastomer (FKM) and ethylene propylene diene rubber (EPDM)
T Polytetrafluorethylene (PTFE)
Material of ball
CCeramic
Connections for hose
U2 Hose connection set: 4/6 mm, 6/9 mm, 6/12 mm, 9/12 mm
U7 Hose connection set: 0.17" x 1/4", 1/4" x 3/8", 3/8" x 1/2"
X Without connections
English (GB)
2.6.2 Type key of foot valves
Code Example FV - 2L - G5/8 PE / V,E / C U2
FV Foot valve
Level indication
NL Without level indication
2L Two-step level indication (low-level signal, tank-empty signal)
Connection size
G5/8 Male thread G 5/8 with groove for O-Ring on top
Material of enclosure, connection, floater
PE High density polyethylene (HDPE)
PV Polyvinylidenfluoride (PVDF)
SS Stainless steel 1.4571
Material of O-ring
V,E Fluorocarbon elastomer (FKM) and ethylene propylene diene rubber (EPDM)
T Polytetrafluorethylene (PTFE)
Material of ball
C Ceramic
SS Stainless steel 1.4401
Connections for hose or pipe
U2 Hose connection set: 4/6 mm, 6/9 mm, 6/12 mm, 9/12 mm
U7 Hose connection set: 0.17" x 1/4", 1/4" x 3/8", 3/8" x 1/2"
A Threaded pipe connection Rp 1/4" (G 1/4" female)
V Threaded pipe connection 1/4" (NPT female)
X Without connections
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