mvt TANGO hp-1 Product information sheet

Operating Instructions and Safety
Instructions
mvt Rotary Nozzle, 3000 bar

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
2/14 Copyright © 2020 mvt AG, Port, Switzerland
Before using the equipment for the first time, read these operating instructions
including the safety instructions. Act in accordance with all these instructions. Keep
them for use later on and hand them over to subsequent owners of the equipment.
In addition to the operating instructions, the general statutory safety and accident
prevention regulations must be observed.
Contents
1 Safety 3-5
1.1 Important information
1.2 Significant risks
1.3 Danger from failure to follow the instructions
1.4 Clothing and protective equipment
1.5 Physical aptitude
1.6 Proper use
2 Operating for the first time 5-7
2.1 Inserting and removing nozzles
2.2 Fastening to the high-pressure lance
3 Technical data 8-11
3.1 Features of the TANGO hp-1
3.2 Nozzle arrangement
3.3 Nozzle selection table
3.4 Water quality
3.5 Flow rate table for the mvt 964 nozzle
4 Malfunction, rectification 12
4.1 General
4.2 Rectifying malfunctions
5 Maintenance / servicing 13
5.1 General
5.2 Wearing parts
6 Warranty 14

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
3/14 Copyright © 2020 mvt AG, Port, Switzerland
1 Safety
1.1 Important information
If the equipment is used improperly, the high-pressure jet from the nozzle can be dangerous
and result in serious injury and damage. The water jet must never be aimed at people,
animals, active electrical equipment or at the high-pressure cleaner itself.
Before use, the high-pressure hoses, the high-pressure spray gun and the pump must all,
without fail, be inspected for possible damage. Hose lines must not be pinched, fed over sharp
edges, driven over by vehicles, tugged or bent. The rotary nozzle must not be operated if any
of the components mentioned above are damaged.
Any person engaged in operating, servicing, inspecting or assembling the equipment must be
appropriately qualified to carry out those tasks. The company operating the equipment must
produce precise instructions covering areas of responsibility, competence and how employees
are supervised.
Training and instruction must be given to any employees who do not have the necessary skills
and knowledge. If necessary, the manufacturer or supplier can provide this training on behalf
of the company operating the machine or pump. The company operating the equipment must
also ensure that their employees fully understand the contents of these operating instructions.
In addition to the safety instructions mentioned in these operating instructions, the
relevant statutory accident prevention and safety regulations must be observed and
adhered to!
1.2 Significant risks
 Risk from the possible escape of liquid under high pressure
The water jet from high-pressure water jet equipment nozzles poses a risk due to its cutting
effect and its ability to penetrate objects, and because the high-pressure water jet nozzle and
hose may change direction or wander. Serious or even fatal injuries may be caused.
Hazardous substances may be released and it is also possible that parts of any object being
cleaned by the water jet may become loose.
 Risk posed by handheld spray fixtures
Handheld spray fixtures pose a particular mechanical risk due to the recoil forces from the
water jet.
 Risk posed by noise
Exposure to noise poses a risk. Exposure to noise can lead to loss of hearing, tinnitus or
physiological problems.
Noise can increase the risk of accidents because it may not be possible to hear alarms or
faults developing in the equipment.
 Risk posed by vibrations
Pulsating vibrations from the pressure unit in handheld spray equipment poses a risk.

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
4/14 Copyright © 2020 mvt AG, Port, Switzerland
1.3 Danger from failure to follow the instructions
There are potential risks to individuals and the environment if the rules for using the equipment
set out in these operating instructions and in the safety instructions in particular are not
followed.
Please take note of Section 1.2, 'Significant Risks'.
1.4 Clothing and protective equipment
So as to operate the rotary nozzle safely, it is recommended that appropriate protective
equipment is worn, e.g. shoes with soles which provide a good grip, protective helmets,
hearing protection, goggles, visors, waterproof protection suits including protective gloves and
boots, high-pressure protective gaiters and aprons; high-pressure hose burst protection should
also be used.
1.5 Physical aptitude
Anyone working with the rotary nozzle must be well-rested, fit and in good health. Anyone
who, for health reasons, may not carry out strenuous tasks, should consult their doctor about
whether it is possible for them to work using the rotary nozzle.
No work should be carried out using the rotary nozzle after taking medication which has the
effect of slowing reactions or after consuming alcohol or taking drugs.
1.6 Proper use
The rotary nozzle is designed for use on manually-controlled high-pressure spray guns.
Particular attention should be paid to the instructions about operating the equipment for the
first time (Point 2) as regards the design of the nozzles (Point 3.2) and the permissible recoil
forces (see Point 3.3 below).
In addition, the relevant accident prevention regulations and any work instructions, operating
and safety instructions issued by the company owning the equipment should also be followed.
Possible applications for the equipment are listed below:
 Refurbishing concrete and removing material
 Cleaning surfaces
 Deburring and cleaning castings
 Removing layers of coating such as paint, etc.
 Cleaning oil and gas platforms
 Cleaning containers, metal gratings, construction machinery, etc.

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
5/14 Copyright © 2020 mvt AG, Port, Switzerland
 Cleaning and removing paint from a variety of metal surfaces, e.g. in the marine sector
 ... and many more applications
For hygiene reasons, the rotary nozzle is not suitable for cleaning surfaces and materials
which come into contact with foodstuffs.
2 Operating for the first time
2.1 Inserting and removing nozzles
1. Before fitting the nozzles, the high-pressure water jet equipment must be switched off.
2. If the nozzles have protective caps, these must first be removed before the nozzles are
fitted.
3. Apply metal lubricating paste to the screw connection threads on the nozzles.
4. Hold the nozzle head with an open-ended wrench (32mm wrench size) and screw the
nozzles in with an Allen key (5mm wrench size).
5. Tighten the nozzles to a maximum of 25 Nm.

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
6/14 Copyright © 2020 mvt AG, Port, Switzerland
2.2 Fastening to the high-pressure lance
It is recommended that a torque wrench be used when fitting a nozzle onto a lance. The
required tightening torque is 70 Nm.
Rotary nozzles must always be unscrewed from the lance before servicing them.
Check the high-pressure threaded screw connections for cleanliness and apply metal
lubricating paste to them before fitting.
1. Slide the M26 pressure screw onto the lance.
2. Screw the thrust ring onto the lance (left-hand thread). Screw the thrust ring onto the
lance to the full extent of its threaded area.
3. Insert the lance cone into the Tango nozzle's counter-cone.

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
7/14 Copyright © 2020 mvt AG, Port, Switzerland
4. Screw in the M26 pressure screw and tighten it (tightening torque 70 Nm).

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
8/14 Copyright © 2020 mvt AG, Port, Switzerland
3 Technical data
3.1 Features of the TANGO hp-1
 Unique seal (patent applied for); this does away with the usual need to change sealing
systems.
 Rotating shaft supported radially and axially by bearings on both sides makes for
maximum robustness – perfect for operating in a harsh environment.
 So that material removal is achieved as effectively as possible, two nozzles are aligned
clockwise (Drive +) and two counter-clockwise (Brake -).
 The maximum volume flow at 3000 is 75 litres/minute. Beware of the recoil force!
 Important: identical-size nozzles must
always be inserted diagonally opposite
each other in order to prevent any
imbalance occurring during rotation (risk
of injury).
Technical data
 Operating pressure: 1,500 – 3,000 bar
 Volume flow: max. 75 L/Min. in accordance
with nozzle selection table 3.2
 Rotational speed: approx. 500 – 4000 rpm.
 Dimensions: Ø40 x 180 mm
 Weight: approx. 1.2 Kg
 Nozzle type: mvt 964 / 965 (Saphir) with or
without jet smoothing insert
 Brake: eddy current brake
 Operating temperature: max. 100°C in
continuous operation
 Max. rotational speed: 8500 rpm.
 Connection thread: M14x1.5 LH or 9/16"-18
UNF
Structure of the rotary nozzle
1. Housing
2. M26 pressure screw
3. Pressure ring M14x1.5 LH or 9/16“-18 UNF
4. Nozzle head
5. Nozzles

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
9/14 Copyright © 2020 mvt AG, Port, Switzerland
3.2 Nozzle arrangement
So that material removal is achieved as effectively as possible, two nozzles on the 4-jet nozzle
head are set as Drive + and two nozzles as Brake –.
It is important that identical-size nozzles are always inserted diagonally opposite each other in
order to prevent any imbalance occurring during rotation (risk of injury). In other words, the two
Drive Nozzles + must always be the same size and the two Brake Nozzles – must always be
the same size.
The Drive Nozzles + must always be bigger than the Brake Nozzles –.
The available pump capacity should be split in the ratio of approx. 70% as Drive + and 30% as
Brake –.
The nozzle head must always rotate clockwise (looking from the lance towards the nozzle
head). If the head does not rotate, the material being cleaned could possibly be damaged
since the pressure against a single point will be too high. In order to start the nozzle head
rotating, it is important that the nozzles are paired as described above. If the head still does
not rotate, there might be a mechanical blockage or the bearing could be defective. Look at
the instructions in Section 4 'Malfunction / Rectification' below.
Example of nozzles fitted for a pump operating at 2500 bar and 21.58 l/min:
Ratio 70/30 =16.1 l/min for the Drive + and 5.48 l/min for the Brake –
Drive Nozzles +=8.05 l/min per nozzle = nozzle Ø 0.60
Brake Nozzles –=2.74 l/min per nozzle = nozzle Ø 0.25

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
10/14 Copyright © 2020 mvt AG, Port, Switzerland
3.3 Nozzle selection table when using 4 nozzles (Keep to the ratio!)
Pressure/bar
Drive +
Brake
-
Flow rate/L
Recoil force/N
3000 2x x 0.55mm 2x x 0.20mm 17.6 225
2500 2x x 0.60mm 2x x 0.30mm 21.1 246
2000 2x x 0.65mm 2x x 0.35mm 22.8 238
1500 2x x 0.75mm 2x x 0.35mm 24.8 225
When using handheld high-pressure spray guns and lances, the recoil force which has to be
absorbed in the longitudinal axis of the spray equipment must not exceed 250N!
If the recoil force exceeds 150N, body support must be worn by equipment operators!
3.4 Water quality
Filter unit 1.0 µm
Solids content max. 50 mg/l (20)
Hardness (CaCO3) max. 25 mg/l (50-175)
Iron content (Fe) max. 0.1 mg/l
Manganese content (Mn) max. 0.1 mg/l
Chloride content (Cl) max. 100 mg/l
Turbidity max. 5 NTU
Free chlorine max. 1.0 mg/l
pH between 6.5 and 8.5

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
11/14 Copyright © 2020 mvt AG, Port, Switzerland
3.5 Flow rate table for the mvt 964 nozzle

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
12/14 Copyright © 2020 mvt AG, Port, Switzerland
4 Malfunction / rectification
4.1 General
In order not to run any risks when rectifying malfunctions, it is important to take account of
everything contained in the operating instructions – especially the "Safety Instructions"
(Section 2), the relevant accident prevention regulations, generally applicable legislation and
directives, and internal company rules.
All the rotary nozzle's component parts may only be replaced by original component
parts supplied by mvt AG.
4.2 Rectifying malfunctions
5
Malfunction
Reason
Rectificat
ion
Operating pressure is not
reached
Threaded connections on the
nozzles / lance not fully
tightened
The nozzles chosen do not
comply with the flow rate
table
Check that the threaded
connections are clean and
firmly seated.
Replace nozzle in
accordance with the flow rate
table
Water loss at the rotary
nozzle
Threaded connections on the
nozzles / lance not fully
tightened
Check that the threaded
connections are clean and
firmly seated.
Defective shaft seal Contact service partner
Mechanical noises Bearings worn Contact service partner
Rotary nozzle does not
rotate
Mechanical blockage,
defective bearing
Drive nozzle too small; brake
nozzle too big
Contact service partner
Adjust nozzle ratio; increase
drive nozzle size; reduce
brake nozzle size.
Material removal
performance worsens
Check the nozzle's jetting
pattern Replace nozzles

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
13/14 Copyright © 2020 mvt AG, Port, Switzerland
Maintenance / servicing
5.1 General
If a malfunction or a defect should occur while using the equipment, contact the local mvt
agent in your country or contact mvt AG directly.
mvt service number: Tel.[phone] / [email protected]
5.2 Wearing parts
Wearing parts are mvt Type 964 / 965 nozzles plus the protection cap.
The degree of any wear depends on the level of soiling in the water used, on the application
and on the operating pressure.
When replacing nozzles, it is recommended that all 4 nozzles be replaced at the same time.

Operating Instructions, Rotary
Nozzle
TANGO hp - 1
Op Instrs
As at 09.01.2020
14/14 Copyright © 2020 mvt AG, Port, Switzerland
6 Warranty
Essentially, mvt AG's General Sales and Delivery Conditions shall apply. These conditions can
be found on our website www.mvt.ch.
Warranty and liability claims are excluded if they are attributable to one or more of the
following causes:
 Improper use of the nozzle
 Incorrect assembly, start-up, operation and maintenance of the rotary nozzle
 Operating without using safety equipment or with defective safety equipment
 Wrongly fitted or non-functioning safety equipment and
protective equipment
 Operating without wearing protective clothing
 Operating with damaged high-pressure hose lines, connectors and adapters
 Inadequate monitoring of those component parts which are subject to wear
 Operating after making one's own structural modifications to the rotary nozzle
 Operating with non-original mvt spare parts
 Repairs and servicing carried out improperly
 Disastrous damage due to foreign objects, and force majeure
mvt AG
Spärsstrasse 5
CH–2562 Port
Tel. [phone]
[email protected]
www.mvt.ch