RBM kiwa RinoxPlus M User manual

RinoxPlus M and RinoxPlusSmart M
MEMBRANE PRESSURE REDUCER
WITH INSPECTIONABLE INTERNAL CARTRIDGE AND FILTER
CT2581.0_00
EN
January 2021
PRODUCTION RANGE
PRESSURE REDUCER WITH INSPECTIONABLE CARTRIDGE RinoxPlus M
Code
Size
Connection
Target: 150 kPa
Target: 600 kPa
Input: 700 kPa
Flow rate (l/min)
Flow rate (l/min)
2581.04.00
Rp 1/2“
FF UNI-EN-10226
42
115
2581.05.00
Rp 3/4”
48
120
2581.06.00
Rp 1”
105
235
2581.07.00
Rp 1”1/4
210
285
2581.08.00
Rp 1”1/2
250
365
2581.09.00
Rp 2”
270
370
PRESSURE REDUCER WITH INSPECTIONABLE CARTRIDGE AND CALIBRATION KNOB RinoxPlusSmart M
Code
Size
Connection
Target: 150 kPa
Target: 600 kPa
Input: 700 kPa
Flow rate (l/min)
Flow rate (l/min)
2581.04.90
Rp 1/2”
MM UNI-EN-10226
with union
42
115
2581.05.90
Rp 3/4“
48
120
2581.06.90
Rp 1”
105
235
2581.07.90
Rp 1”1/4
210
285
2581.08.90
Rp 1”1/2
250
365
2581.09.90
Rp 2”
270
370
SPARE PARTS / ACCESSORIES
Code
Suitable for measurement
Degree of filtration
Description
8167.003
1/2“ – 3/4”
800 micron
Removable internal cartridge
complete with filter
8201.003
1”
8202.003
1”1/4
8203.003
1”1/2 – 2”
7367.005
1/2“ – 3/4”
800 micron
Removable filter
7387.005
1”
7401.005
1”1/4
7403.005
1”1/2 – 2”
1213.005
-
-
Radial pressure gauge ø 50.
Full scale: 0 ÷ 16 bar.
Connection: 1/4”
* Compliant with EN 1567 and certified Kiwa.
RinoxPlusSmart M
RinoxPlus M
*
LIC. 25790

Technical Sheet CT2581.0-EN_00 RBM Page 2 of 7
DESCRIPTION
The RBM RinoxPlus M pressure reducers are membrane
pressure reducers with inspectionable and easily interchangeable
internal cartridge, complete with removable filter.
The cartridge is a compensated seat: upstream pressure
variations do not affect the adjustment of the downstream
pressure.
In addition, the RinoxPlusSmart M reducer is equipped with a
graduated knob to carry out the calibration, without the use of a
pressure gauge and tools.
THE PURPOSE:
The main purpose of the RinoxPlus M and RinoxPlusSmart M
pressure reducers is to reduce the fluid pressure to optimal
values, constantly below the maximum allowed in order to avoid
damaging the utilities placed downstream of the reducer.
THE USE:
RinoxPlus M and RinoxPlusSmart M are adjustment parts and
not for safety. For this purpose, provide the system with the
appropriate safety devices.
They are particularly suited to be used in the plumbing, heating
and sanitary systems. In particular, they are indicated for the final
reduction of the pressure to the utility.
THE CHOICE:
RinoxPlus M and RinoxPlusSmart M pressure reducers re
intended to be used in the plumbing, heating and sanitary
systems with upstream pressure not higher than 16 bar.
The pressure reducer is pre-set in the factory with a output
pressure adjustment: P = 3 bar (300 kPa).
The correct choice of number of pressure reducers necessary for
the pressure reduction is important to avoid cavitation.
These phenomena, in fact, create an excessive noise in the
reducer, with consequent problems for the utilities and possible
damage of the reducer itself.
For this reason, please refer to the dedicated section inside the
technical data sheet for the optimal choice of the number of
reducers in relation to the pressure variation to be obtained.
MAINTENANCE INTERVENTIONS
Before carrying out any maintenance operation, shut off the
reducer.
For the replacement, control and cleaning of the reducer, simply
unscrew the cap and remove the internal cartridge, which
contains all the mobile parts and consumables.
When replacing the cartridge the reducer goes back to being like
new.
It is possible to remove the filter from the cartridge to carry out
cleaning or replacement.
During these operations, the body remains installed on the
system.
CONSTRUCTION FEATURES
•Body: DZR Brass (CR) CW602N
•Metal internal components: DZR Brass (CR) CW602N *
•Internal cartridge: POM
•Filter: AISI 302
•Rod: DZR Brass (CR) CW602N
•Seals: Elastomer
•Exterior plastic parts: Nylon 6 with 30% fibreglass
•Pressure gauge holder connection: F G 1/4"
* All the internal components water contact made of DZR Brass (CR) CW602N
TECHNICAL FEATURES
•Compatible fluid: Water
•Nominal pressure: PN25 (cold water 40°C) / PN16 (hot water 80°C) *
•Maximum upstream pressure: 25 bar (cold water 40°C) / 16 bas (hot water 80°C) *
•Adjustable downstream pressure: 0.8÷7 bar (80÷700 kPa)
•Default presetting: 3 bar (300 kPa)
•Thread: FF UNI-EN-ISO 228 / MM UNI-EN-ISO 228 union (depending on the model)
•Maximum operating temperature: 80°C
* For more details please see section “Maximum upstream pressure related to the temperature” reported in this technical sheet.
Internal cartridge
Cap
Filter
Reducer body
Diaphragm

Technical Sheet CT2581.0-EN_00 RBM Page 3 of 7
MAXIMUM UPSTREAM PRESSURE RELATED TO THE TEMPERATURE
DIMENSIONAL FEATURES
Code
Size
A
[mm]
B
[mm]
C
[mm]
D
[mm]
E
[mm]
2581.04.00
Rp 1/2”
80
17.5
76.4
93.9
46
2581.05.00
Rp 3/4”
84.4
16.5
77.5
94
46
2581.06.00
Rp 1”
107.6
25
115.5
140.5
61
2581.07.00
Rp 1” 1/4
121.2
27.4
119.5
146.9
61
2581.08.00
Rp 1” 1/2
121.8
27.9
125.3
153.2
61
2581.09.00
Rp 2”
137.2
33.6
127.4
161
61
Code
Size
A
[mm]
B
[mm]
C
[mm]
D
[mm]
E
[mm]
2581.04.90
Rp 1/2”
80
17.5
90.8
108.3
46
2581.05.90
Rp 3/4”
84.4
16.5
91.9
108.4
46
2581.06.90
Rp 1”
107.6
25
134.3
159.2
61
2581.07.90
Rp 1” 1/4
121.2
27.4
138.2
165.6
61
2581.08.90
Rp 1” 1/2
121.8
27.9
144
171.9
61
2581.09.90
Rp 2”
137.2
33.6
146.2
179.8
61
Upstream pressure (bar)
Temperature of the fluid (°C)

Technical Sheet CT2581.0-EN_00 RBM Page 4 of 7
OPERATION
The RinoxPlus M and RinoxPlusSmart M pressure reducers base their operation on the balance between the counter-strength of the
spring with the thrust carried out by the pressure of the fluid on the shutter. The spring, in fact, tends to open the shutter of the
reducer, while the pressure on the surface of the membrane tends to close the shutter itself.
When the utilities to be served are closed, the downstream
pressure increases by pushing the membrane of the reducer to
the bottom. In this way, the shutter closes the passage section of
the reducer, while maintaining the pressure constant at the
calibration value, set on the spring; the minimum pressure
difference existing across the shutter allows, in fact, the perfect
closure of the latter.
With the opening of the downstream utilities, the pressure exerted
on the membrane is less in favour of the force exerted by the
spring on the shutter allowing its opening with the consequent fluid
passage.
The higher the water request by the utility mains, the more the
pressure on the membrane decreases and the greater will the
water passage be.
PRESSURE REDUCER CALIBRATION
The final calibration of the pressure reducer must be carried out with the hydraulic circuit
completely full and with all utilities closed, otherwise values would be affected by the fact that,
during the possible supply, the downstream pressure decreases in relation to the amount of
required flow.
The pressure reducer is calibrated by acting on the inner ring nut, turning it clockwise increases
the value, turning it anti-clockwise decreases it.
Calibration operations:
•Close the shut-off valve downstream of the pressure reducer.
•Calibrate the pressure reducer by acting with the appropriate wrench depending on the
models.
•The calibration operation is to be considered complete when the pressure gauge shows the
desired pressure.
Warnings:
•Perform some discharge manoeuvres to check the stability of the calibration.
With the system operational, the pressure read on the pressure gauge may be distorted by the
overpressure of the thermal system, a possible correction must always be carried out with the
system shut down and at ambient temperature.
Outlet:
utilities open
Pressure stopped
at the adjustment
value of 3 bar
Pressure
drop: P < 3
bar
Compensation
chamber
Inlet
SHUTTER
OPENING
3 bar
Inlet
Outlet:
utilities closed
Compensation
chamber
SHUTTER
CLOSING
3 bar

Technical Sheet CT2581.0-EN_00 RBM Page 5 of 7
FLUID DYNAMICS FEATURES
Load losses diagram
READING THE DIAGRAM: The diagram of the pressure reducer pressure drops shows the pressure drop based on the flow rate at
the utilities outlet.
EXAMPLE: Consider the 3/4" pressure reducer with pre-calibration pressure equal to P = 3 bar (300 kPa) and hypothesise a flow rate
Q = 1300 l / h, at utility outlet. The diagram shows that for this flow rate Q, the pressure value is P1= 0.7 bar (70 kPa). The pressure
gauge on the pressure reducer reads the following pressure value P0= 3 - 0.7 = 2.3 bar (300 - 70 = 230 kPa), which represents the
utility outlet pressure value.
1/2 "
3/4 "
1 "
1 "1/4
1 "1/2
2 "
Graphics realised with the condition defined by Standard EN 1567
(Upstream pressure: 8 bar - Downstream pressure: 3 bar)
Note the project flow rate, it is possible to detect the loss of pressure.

Technical Sheet CT2581.0-EN_00 RBM Page 6 of 7
DIMENSIONING OF THE PRESSURE REDUCER
0
1
2
3
4
0 2,5 5 7,5 10 12,5 15
PUNTO 1
PUNTO 2
PUNTO 3
ZONA 1
ZONA 2
ZONA 3
0
1
2
3
4
0 2,5 5 7,5 10 12,5 15
PUNTO 1
PUNTO 2
PUNTO 3
ZONA 1
ZONA 2
ZONA 3
In order to avoid cavitation and therefore excessive noise of the component, it is recommended to dimension the number of pressure
reducers required for a certain pressure drop as described in the "CAVITATION DIAGRAM".
The cavitation diagram shows three areas of operation of the pressure reducer depending on the upstream and downstream
pressures:
•ZONE 1: Malfunction zone. The cavitation phenomena are clearly visible and present inside the reducer: avoid operating the
reducer at these pressures.
•ZONE 2: Critical zone. It highlights the possible creation of cavitation inside the reducer. We advise against operating the reducer
within this range of pressure values.
•ZONE 3: Zone of operation. The reducer works in optimal conditions and does not recess. The range of pressure values is
optimal for the operation of the reducer.
In order to avoid cavitation phenomena, it is recommended to run the reducer inside ZONE 3 and, also, avoid that the ratio between
the upstream maximum pressure and the downstream adjustment pressure of the reducer exceeds the value of 2.5.
DIMENSIONING
You wish to run a reducer within the following pressure values:
•P upstream: PM= 8.5 bar
•P downstream: PV= 1.5 bar
As you may notice from the diagram (POINT 1), at these operating pressure values, the pressure reducer meets certain cavitation
phenomena.
To avoid these phenomena, and taking into account that the ratio between the upstream maximum pressure and the downstream
adjustment pressure must not exceed the value of 2.5, you can introduce a second pressure reducer in series, in order to obtain the
same pressure drop through two distinct pressure jumps.
The possible solution, therefore, is to use two pressure reducers in series, that must both work in ZONE 3 of the diagram, split the
pressure difference on two reduction stages, with a pressure ratio not over 2.5.
Possible solution:
Pressure reducer A [POINT 2]:
•P upstream: PMA = 8.5 bar Pressure ratio: 8.5/3.5 = 2.4 < 2.5
•P downstream: PVA = 3.5 bar
Pressure reducer B [POINT 3]:
•P upstream: PMB = 3.5 bar Pressure ratio: 3.5/1.5 = 2.3 < 2.5
•P downstream: PVB = 1.5 bar
N.B.: The pressure downstream of the reducer must never be greater than the maximum operating pressure of the components,
which are downstream of the reducer itself, in order to avoid damage or malfunctioning.
The cavitation of the pressure reducer can be checked, as well as by acting on the pressure difference, also by selecting an optimal
value of the speed of fluid passing through it.
It is advisable, therefore, to choose the diameter of the pressure reducer so that the speed of the fluid going through it, is contained
within the following values:
•For water: V = 0.7 ÷ 1.5 m / s (residential use)
V = 1 ÷ 3.5 m / s (industrial use)
* N.B: The cavitation diagram has the sole purpose of supplying the technician with a quick reference to match the chosen component with a
given system size. The values shown in the table are not binding and therefore do not represent the performance limits of the components.
CAVITATION DIAGRAM *
Upstream pressure [bar] (1 bar = 100 kPa)
Downstream pressure [bar] (1 bar = 100 kPa)
SECTION 2
SECTION 1
ZONE 3
SECTION 3
ZONE 1
ZONE 2

Technical Sheet CT2581.0-EN_00 RBM Page 7 of 7
ASSEMBLY
MAIN COMPONENTS THAT CAN BE USED WITH RINOXPLUS M PRESSURE REDUCER
CODE
DESCRIPTION
3.03÷13.00, 3.03÷13.10,
3.03÷09.70, 3.03÷13.20
Line filter with removable filtering cartridge. Max. operating pressure: 16 bar.
Thread UNI-EN-ISO 228. Filtering capacity from 800 μm to 50 μm.
858.04÷09.12,
858.04÷09.02,
858.04÷09.72
Y-filter with removable filtering cartridge. Max operating pressure: 16 bar.
Thread UNI-EN-ISO 228. Filtering capacity from 800 μm to 100 μm.
126.03÷13.10
Self-cleaning filter for water with removable filtering cartridge, complete with dial pressure
gauge and discharge ball valve with hose connection.
Max. operating pressure: 16 bar. Thread UNI-EN-ISO 228. Filtering capacity 100 μm.
Series 929, 930, 931, 959,
1041, 1156, 1171,1172,
1173, 1200, 1201, 1215,
6059, 6062, 6065, 6068,
6071, 6074
Spare cartridge for line, Y, self-cleaning filters.
304.04÷13.00
Magnetic water softener for physical treatment of water.
Max. operating pressure: 16 bar. Thread UNI-EN-ISO 228.
67.04 ÷ 07.02, 67.04 ÷
07.12
Full bore ball valve for water, butterfly handle operated, MF connections. Thread UNI-EN-
ISO 228.
67.05.70, 67.06.70,
67.05.00, 67.06.00
Full bore ball valve for water, butterfly knob operated, MF connections with OR seal fitting.
Thread UNI-EN-ISO 228.
72.04÷09.00, 72.06.50
Three-piece MM joint straight fitting.
Max. operating pressure: 10 bar. Thread UNI-EN-ISO 228.
1100.05.00, 1100.06.00
Three-piece MM straight joint fitting with OR seal on connections.
Max. operating pressure: 10 bar. Thread UNI-EN-ISO 228.

RBM spa reserves the right to make improvements and changes to the products described and the
relative technical data at any time and without notice.
The information and images contained in this document are intended to be provided for information
purposes only and are not binding and in any case do not exempt the user from strictly following the
regulations in force and the rules of good practice.
Assembly precautions:
•Always install a filter upstream
of the system.
•Carry out the routine
maintenance of the filters.
•Follow the direction indicated by
the flow direction arrow located
on the body.
•Use shut-off valves to allow any
maintenance work.
•Clean the pipes upstream and
downstream of the pressure
reducer to avoid damage.
•The reducer can be mounted
horizontally and vertically.
OK
OK
RBM Spa
Via S.Giuseppe, 1
25075 Nave (Brescia) Italy
Tel. [phone]
Fax [phone]
www.rbm.eu