PEDRO GIL RN User manual

ROTARY PISTON
BLOWERS
(ROOTS-type compressors)
MODEL SIZE SERIAL Nº
INSTRUCTION MANUAL
for starting and maintenance
MODEL: RN - RNT - RNT/E
RNF
RNG - RNGT - RNGT/E
RNP - RNPT
RS

TABLE OF CONTENTS
1.0 Foreword
2.0 Safety instructions
3.0 Reception at plant
4.0 Loading and unloading (methods)
4.1 Storage
5.0 Starting (assembly and preparation)
5.1 Commissioning
5.2 Start-up
5.3 Precautionary notes
6.0 Setting the safety valve
6.1 Installing the frequency variator
6.2 Installing motor with reversible poles
7.0 Pulleys (aligning)
7.1 Belts (tightening and replacement)
8.0 Oil
8.1 Oil table
9.0 Maintenance (main points)
9.1 Maintenance plan
9.2 Cleaning
9.3 Cleaning filters
10.0 Pressure Relief Valve
11.0 PG-30 Muffler filter for suction
12.0 Common optional accessories
13.0 Soundproof cabin
13.1 View of soundproof cabin
13.2 View of bolt location in cabin base
14.0 Unloading valve
15.0 PG-35 and PG-38 unit protection filters
15.1 View of protection filter
16.0 Directive 94/9/CE; see ATEX
17.0 RNG-type blowers for gas
18.0 RS-type blowers with gaskets
19.0 Possible faults and how to detect them
3

4
SAFETY INSTRUCTIONS
-Do not use the machine before reading the enclosed
instruction manual
-Use suitable protection and the necessary
equipment for the possible hazards arising from
the installation and use of this equipment
SAFETY WARNINGS
• Keep your body and clothes away from the rotating machinery and the intake and exit openings.
• Ears must be protected from the high noise levels.
• The high temperatures of the blower may cause burns if touched.
• The protection for the drive belts and coupling must be correctly fitted.
• The mounting for the blower and the motor must be checked.
WARNING
The safety precautions set out above can be seen on stickers on each of the machines supplied.
Under no circumstances should the stickers be removed, painted over or covered.
Non-fulfilment of or lack of attention given to these safety warnings could lead to serious injury to workers
operating or maintaining the machine.
WARNING
WARNING WARNING WARNING WARNING
Keep your body and
clothing well away from
the openings of the
blower unit
Do not use the machine
if the protection guards
are not correctly
installed.
Hearing protection
required.
Do not touch hot
surfaces.

POSITION OF EARTHING CONNECTIONS
EARTHING THE CABIN
EARTHING THE UNIT
5

6
1.0 FOREWORD
PEDRO GIL, S.A. (hereinafter PG), has produced this manual to provide the necessary information to carry out the
safe, correct and efficient procedures for the starting and maintenance of the blowers and compact units it
manufactures. The workers responsible for these operations must have read and understood this manual.
This machine has been manufactured and assembled according to the guidelines set out in European safety regulations.
This manual makes up a part of the documentation required by the aforementioned regulations and adds to them by
providing
specific instructions for PG machinery, with the intention of maximising safety, for both
workers and materials.
2.0 SAFETY INSTRUCTIONS
•Do not start up the unit before reading the instruction manual.
•Disconnect the power supply when you need to work with the machine or one of its components.
•Use suitable protection and the equipment necessary for any possible hazards arising from the operation or
installation of this machine
.
•Keep your body and clothes away from the rotating machinery and the intake and exit openings of air or
gases to be propelled.
•Without a cabin, ears must be protected from noise levels.
•The temperatures generated by compression within the blower can cause burns.
•The protection for the drive must always be attached and fitted correctly. If, for any reason, the unit is to be
disassembled, it must be stopped beforehand.
•The mountings for the blower, motor and accessories must be inspected regularly.
•If the blower unit incorporates a soundproof cabin, it will not start up until all of the panels and the door have been
positioned correctly and closed. If it is necessary to move the panel where the fan is located, it must always have
stopped before removal.
•In order to avoid shock from static electricity, connect the earths for both the muffler bed and the soundproof cabin,
as necessary (see diagram). The earth connection must made using a cable with a minimum diameter of 16 mm2.
•Do not use the blower unless these limits regarding operating conditions are fulfilled.
•An emergency stop button must be provided so the blower can be stopped if necessary.
•Never start up the blower when either the suction or thrust clamps, or both, are open.
•When cleaning or removing grease from the blower, always do so when the machine is cold, using non-toxic liquids
or mixtures. Some of these fluids can react violently to heat.
•If the machinery has to be manipulated, this must be carried out by persons qualified to do so.
•If you have any problems or doubts, please contact our technical service.
Tel.: [phone]
Fax: [phone]
e-mail: [email protected]
• All PG blowers are designed and manufactured in accordance with the current European regulations. However, we
recommend that these safety and maintenance instructions, which form a part of the aforementioned regulations,
are strictly followed.
3.0 RECEPTION AT PLANT
Machinery and accessories should be protected from any possible knocks during transportation.
The machine should be inspected on arrival at its destination.
Check that:
•No damage has occurred.
•The entire order has been delivered.
•The technical data shown on the plate with the blower specifications coincides with the order made.
4.0 METHODS OF LOADING AND UNLOADING
•Never hang the machine by its shaft. See diagrams.
4.1 STORAGE
•The storage of blowers and blower units is highly important to ensure that they remain in perfect condition.
•They must be stored in a dry, sheltered area.
•In the case of long-term storage, fill both sumps with oil to the normal level.
•Protect the interior of the machine, the pistons and the moving parts with anti-corrosion oil.
•
Manually turn the blower shaft and the motor on a regular basis, to ensure that the bearings do not seize up.

LOADING AND UNLOADING
BLOWER UNIT
WITH CABIN
RN/A TYPE RN/B TYPE
7

8
ASSEMBLY: B-51.FASSEMBLY: B-51.C
ASSEMBLY: PG-30 / 35 / 38
5.0 ASSEMBLY AND PREPARATION FOR STARTING
•Before locating the unit or blower, the surface must be completely clean and dry, and free of any oil.
•The surface of the base must be scrubbed and clean, as well as the holes for the anchor bolts. Blow them with clean
air if possible.
•The surface of the base must be completely smooth.
•After locating and supporting the machine, the surface must be drilled, and without moving the unit, the anchor bolts
must be fixed in place. If the unit is installed onto the base of the cabin, the same procedure is carried out from the
base.
•The connection with the thrust or suction tube (in which case it operates at low pressure) will be as stable as
possible, through the rubber hose or axial compensator.
•If the unit is located in a room, check that the air intake is balanced and correct.
•Install an earth for the motor, muffler bed and soundproof cabin, to prevent charging and
discharging of static electricity.
•In order to connect the electric motor, it is VERY IMPORTANT to know the type of start up and check the
connections in the junction box. The technical and service data, shown on the specifications plate and the
connection diagram must be checked. The motor comes with its own instruction manual. THIS WORK MUST
BE CARRIED OUT BY SUITABLY QUALIFIED PERSONNEL.

•The motor is installed on a tilting base (PG-30/PG-35/PG38 units). Do not forget to leave enough cable to be
able to change the belts and tighten them more easily.
•NOW FILL WITH OIL TO THE CORRECT LEVEL.
5.1 STARTING
•First follow the instructions in section 2.0
•Ensure that it has been filled with oil.
•Re-tighten and check the filling and emptying caps.
•Check the TURNING DIRECTION of the blower, indicated by the arrow shown, by starting and stopping the
motor after 1 second. Always look straight at the blower axis.
• Ensure that the installation tube is free of any obstacles and all the flow valves are open.
•Check that the suction side is free of any blockage and the filter cartridge is clean, if the unit has been stored
or located in a dusty atmosphere.
•The unit is ready for start up.
5.2 START-UP
If starting without load:
•Run it for 30 seconds and then stop it again, checking that the blower slows down gradually, without making
any strange noises.
•The safety valve is delivered unset. (see section 6.0 Setting the safety valve)
•Re-start the blower unit and check all the safety devices.
•The blower unit is ready for SERVICE.
5.3 PRECAUTION
If you intend to stop the blower for more than 3 weeks, we recommend that you follow the instructions in
section 4.1 Storage
6.0 SETTING THE SAFETY VALVE.
This valve is solely designed to protect the blower from an overload and it should be situated such that between
the blower and the valve there is no closing mechanism. It is not to be used as a regulating valve.
The safety valve is delivered unset.
The reason for this is to have the valve installed at 100% capacity, as the operating pressure usually varies with
respect to what was established in the order, thereby producing poor setting, either under or over.
•To set the valve, remove the hood covering the spring.
•Start up the blower unit in normal operating mode. The valve should then open.
•Tighten the spring by adjusting the nut at the top until the valve closes.
When it is closed, turn the nut one more time, then fasten it in that position with the locking nut.
•Refit the hood.
The valve is set at the optimum point.
6.1 INSTALLING THE FREQUENCY CONVERTER.
•Follow the instruction manual.
•The frequency converter to be used must be suitable for operating with constant torque.
•Both minimum and maximum frequencies must be set to avoid problems with lubrication and excessively high
temperatures when it is too low, or surpass the maximum speed when it is too high.
WARNING: Earthing
With converter drive, particular attention must be paid to the earthing devices to ensure:
1.- Correct operation of all the protection devices and relays for general safety.
2.- A minimum or acceptable level of electromagnetic interference.
3.- An acceptable tension in the bearings of both the motor and the blower to avoid current and bearing faults.
4.- The electric cable connecting the variator to the motor must be screened.
9

10
6.2 INSTALLATION OF MOTOR WITH REVERSIBLE POLES.
•Follow the instruction manual.
•Every time the speed is reversed, the motor must be at zero revs.
7.0 ALIGNMENT OF PULLEYS
The alignment of the pulleys can be carried out with the help of a
thread or steel rule.
Parallel alignment of the axles is attained when the taught thread
or rule touch the pulleys at points 1, 2, 3, and 4 in a straight line.
7.1 TIGHTENING AND REPLACEMENT OF BELTS
We recommend that the full set of belts is always replaced.
Tension is measured by the perpendicular force required on the
drag side.
Re-tighten the belts after two hours’ service.
Bending
force
Side
BENDING = 1 mm per 100 mm on the drag side.
Section
SPZ
SPA
SPB
SPC
kg
2,5
5
7,5
12,5
ARROW FOR FORCE
DISMANTLE
PROTECTION (Pos. 0)
LOOSEN LOCKING NUTS
FOR THE BASE (Pos. 1)
LOOSEN EDGE NUTS
TENSOR (Pos. 2)
LOOSEN NUTS
SIDES (Pos. 3)
ADJUST TENSION
NUTS TO
LIFT PLATE (Pos. 4)
REPLACE BELTS
TIGHTENING AND REPLACEMENT
OF BELTS

VERY IMPORTANT
* AFTER ADJUSTING THE SUPPORT PLATE TO
SET THE CORRECT BELT TENSION
LOCK THE HINGE NUTS
AFTER TWO HOURS OF
SERVICE, RE-TIGHTEN THE
BELTS
11
1Oil level sight glass
2Oil filling cap
3Oil emptying cap
4Pressure connection:
Connection for measurement instrumentation.
Up to blower size
33.30 = 1/4” G
From the size 34 = 1/2” G
5Condensation exit (bleed)
Size 60 = 1/8” G
Sizes 30 to 33 = 1/4” G
Sizes 34 to 27 = 1/2” G
In blowers for air, it is open to the atmosphere.
In blowers for enclosed gas, piped off to low pressure clamp,
etc., the system necessary is adopted, depending on the gas and
the operating conditions.
8.0 OIL.
Oli splash provides lubrication to both gears and bearings .
IMPORTANT
Excess filling will provoke an increase in the oil temperature, and therefore incorrect mechanical operation of the
blower. This can also produce oil loss to the compression chamber. In blowers with pressurised lubrication, and
pressurised lubrication with an oil cooler, the oil pump is assembled on the sump opposite the drive side.
Correct oil level is indicated in the drawing.

12
8.1 OIL TABLE
In order to ensure blower gear long life and proper lubrication, it is necessary to turbine oil with a viscossity
grade as shown below.
On our machines it is essential to use oil with a minimum viscosity at 40 OC between 198 and 242 cSt (ISO VG-220).
This type of oil maintains all its characteristics in blowers that discharge gases at a maximum temperature of
110 OC at blower exit.
Higher discharge temperatures require increased oil viscosity. In these cases oil with a minimum viscosity at 40 OC
between 290 and 400 cSt (ISO VG-320) should be used.
N.B.
As regards brands of libricating oil, C.M. Pedro Gil recommends using quality names, with no specific
preferences.
These are 5 litres cans available for customers whose needs do not justify the purchase of 50 litre or 200 litre
barrels.
Warnings:
We do not recommend the use of differents quality oils as, depending on circumstances, different oil mixtures
may cause problems. The barrels should be kept air-tight until use to prevent oil contact with external air
humidity.
Service up to 110 OC
ISO VG-220 oil viscosity
Service above 110 OC
ISO VG-320 oil viscosity
APPLICATION A
APPLICATION B
Estimated quantities. It is absolutaly necessary to check the blower
oil level.
TOTAL
Application A Application B
TOTAL
30
31
32
33
34
35
36
0,62
1,1
1,58
3,05
4,95
7,5
16
27
0,21
0,38
0,54
1,05
1,7
2,5
6
9
0,41
0,72
1,04
2
3,25
5
10
18
0,76
0,98
1,61
2,45
4,69
8,5
12,5
27
35
0,26
0,31
0,56
0,8
1,58
3
4
9
12
0,5
0,67
1,05
1,65
3,11
5,5
8,5
18
23
12 12
RNT
60
20
21
22
23
24
25
26
27
RN

9.0 MAIN POINTS FOR MAINTENANCE
1- Check the oil level
of the sumps with the machine stopped.
2- Regularly clean the filter cartridge.
(depending on the environment in which the machine is operating).
3- Change the oil in the sumps every 4000 hrs.
(first change at 500 hrs).
4- Check the condition of the belts regularly.
5- Keep the electric motor bearings lubricated
according to the manufacturers specifications.
6- Check the blower bearings after 20,000 hrs of service.
7- After changing the belts, check for correct
locking of unit hinge nuts.
13
1

14
9.1 MAINTENANCE PLAN
•After a few hours of service, it is important to re-tighten the belts, as it is during the first few hours when
adjustments between the pulleys and belts are required
WEEKLY TASKS
•Check the suction filter, clean it if the pressure loss exceeds 50 mbar.
•Check the oil level.
•Check the unit for vibrations and unusual noises.
AFTER 500 HOURS OF SERVICE, maximum of six months.
•Change the lubrication oil.
•Clean the suction filter.
•Check the level of the coupling, or the alignment of the pulleys and belt tension.
•Turn the blower by hand and check that it moves smoothly.
AFTER 1,000 HOURS OF SERVICE
•Clean the suction filter.
•Check the safety valve.
•Check the non-return valve.
•Check the belt tension.
AFTER 4,000 HOURS OF SERVICE
•Clean the suction filter.
•Take and check samples of the lubrication oil and change the oil if necessary.
•Check the level of the coupling, or the alignment of the pulleys and belt tension.
•Check the safety valve.
AFTER 8,000 HOURS OF SERVICE, maximum of 1 year.
•Clean or change the suction filter.
•Change the oil.
•Check the safety valve.
•Check the level of the coupling, and the condition of elastic parts (drag rubber) and change them occasionally.
Check the alignment of the pulleys and belt tension. Check the condition of the belts and change them
occasionally.
THE OIL MUST BE CHANGED ONCE A YEAR.
AFTER 20,000 HOURS OF SERVICE
•General inspection by an authorised specialist.
9.2 CLEANING
Rotary piston blowers operate without any contact between the pistons or between the pistons themselves
and the body and side covers, which allows these machines to work with fluids containing a limited amount
of sediment. The B.4 and B.5 type blowers (vertical fluid movement, from top to bottom), are moresuitable
than those with horizontal fluid movement.
Moreover, in vertical fluid movement, when the fluids transported are gases that may produce condensation or
fluid drag in a continuous and uniform manner (not sudden liquid flow), the compression chamber remains free
of fluid due to the action of gravity.
The diversity and different nature of the pumped or transported gases and gaseous mixtures is such that no
valid general instructions for cleaning can be provided.
For the blowers to operate smoothly and without friction, the pistons and the body must be completely free of
oil, dust or residue.
When operating in difficult conditions, dust, grease or sticky residue, etc. can accumulate, in the interior
of the compression chamber. In such cases, the interior of the blower must be washed using industrial
detergents or solvents, such as: petrol, tetralin, kerosene, etc., depending on the nature of the sediment.
Sticky or encrusted sediments, should be removed using a spatula or a suitable solvent or superheated steam.

To check the blower, the suction and thrust pipes must be disconnected.
The oil level gauges must always be clean. Check them and clean them when visibility is reduced.
After cleaning, the grease must be changed.
In very difficult cases our technical service should be consulted and an occasional visit from one of technical
specialists should be requested.
9.3 CLEANING THE FILTERS
The filter cartridges can be used several times.
The cartridge can be easily cleaned when removed.
Cleaning method:
1. With gentle taps.
2. Blowing with compressed air.
3. Washing with cold water.
4. In difficult cases, such as encrusted dirt, or depending on the type of dust, it can be cleaned with a liquid
mixture of water and a suitable detergent available on the market.
NOTE: never heat the filter cartridges.
9.4 CHECKING THE FILTER
In difficult working conditions, the filter resistance due to dirt can be controlled with the following instruments:
•Water-column pressure gauge.
•Differential pressure gauges
•Pressure switches.
10.0 PRESSURE RELIEF VALVE
This valve is designed to protect the blower from overloads, and it must be located such that between the
blower and the valve there is no closing mechanism.
When assembling the pipe clamp, there must not
be any tension in the base clamp.
The material used in the hood, piston and jig
bushing is bronze (in special cases, aluminium,
stainless steel).
The valve setting is recommended when the blower
is installed and commissioned. See section 6.0.
The adjustment is restricted by the limits of the
valve spring. If the adjustment is necessary beyond
these limits, the spring should be changed.
To make the adjustment or modify the differential
pressure, remove the hood and loosen or tighten
the adjustment nuts.
The jig bushing does not require any lubrication,
but it should be checked for correct operation from
time to time. To carry out this check, the differential
pressure the valve is set at, which is shown on the
specifications plate, has to be produced.
If jammed, disassemble and clean.
15

16
11.0 MUFFLER FILTER FOR SUCTION, PG-30
ABSORBING
SOUNDPROOFING
MUFFLER CARTRIDGE
EXTERNAL
CARTRIDGE OPENING
EXTERNAL MUFFLER
INTERNAL MUFFLER
CARTRIDGE
CARTRIDGE
FILTER
FILTER CARTRIDGE
SUPPORT
ENSURE CORRECT ALIGNMENT OF
MUFFLER CARTRIDGE OPENINGS
WITH THE OPENING OF SUCTION FILTER
CARTRIDGE OPENING
INTERIOR MUFFLER
SUCTION
OPENING
PRESSURE FILTER

12.0 COMMON OPTIONAL ACCESSORIES.
1.- Soundproof cabin
2.- Relief valve
3.- Vacuum gauge to indicate blockage in the suction filter.
4.- Pressure gauge to indicate differential pressure.
5.- Pressure switch to limit pressure, electrically controlled.
6.- Thermostat to limit temperature of compressed air or gas, also controlled electronically.
13.0 SOUNDPROOF CABIN
In line with current noise regulations, it has become an essential element in most work environments.
PG has carried out noise surveys to significantly improve this product.
It is constructed using panels of galvanised metal sheets, which can be dismantled. Each soundproofing
panel contains a layer of polyester noise-absorbing material, which is self-extinguishing, and a waterproof
film.
The various panels fit together with self-aligning pivots and they are fixed in position using the instant-opening
metal clips.
The cabins for large units (DN-200/DN-250/DN-300) are supplied with a side door. One panel of the cabin
is supplied ready for the optional installation of the pressure gauge, vacuum gauge and/or thermometer. It also
incorporates a plate to enable access to the electric cabling of the motor inside the cabin.
All of the cabins incorporate a compact electrical fan to renew the air inside.
The cabin and the unit are designed as one compact unit, which can be transported as such, thereby easing
transportation and later assembly.
17

13.1 PG-30 / PG-35 / PG-38 CABIN
The two possible panels are shown, for a PG-30 or PG-35/38 unit
RUBBER HANDRAIL FRAME
INTAKE GRILL
ANCHORING PIVOT
SIDE ANCHORING PIVOT
FLOOR ANCHORING
EXTRACTOR FAN
GRATE EXIT
PRESSURE GAUGE VACUUM GAUGE
ELECTRICAL CONNECTION PLATE
FRAME RUBBER HANDRAIL
FIXING PLATES FOR MACHINE
PANEL FOR
PG-30 UNIT
PANEL FOR
PG-35/38
UNITS
18

13.2 DETAIL OF BOLT LOCATION IN CABIN BASE
CABIN BASE
IMPACT BOLT
WASHER
EMBRAFIX
CABIN BASE
19

20
14.0 RELIEF VALVE
15.0 MAINTENANCE OF THE PROTECTION FILTER APPARATUS FOR PG-35 / PG-38 UNITS
The frequency of the cleaning of the protection filter depends on the type of product and the environment in which
the unit operates in. Under normal operating conditions the filter should be cleaned every 6 months.
The procedure is described below:
1) Loosen the bolts at the top to be able to remove the cover of the filter unit.
2) Ensure that there are no deposits which can fall into the
blower when extracting the filter.
3) Loosen the bolt at the top of the protection filter before extracting it.
4) After extracting the filter, it may be cleaned with compressed air. If the unit is
used in a greasy environment, we recommend using a solvent.
5) Mount the filter, keeping it free of foreign bodies.
6) Before starting the electric motor, turn the blower axis manually and check it turns
freely, to ensure the absence of foreign bodies.
The PG unloadin
g
valve r
e
moves the air
p
roduce
d
when the blower is started u
p
. This eliminates th
e
ne
g
ative effect of the overload resultin
g
from th
e
counter-pressure at start-up as well as a
g
radua
l
start-u
p.
In
s
t
a
ll
a
ti
on
Th
e
r
e
li
e
f
v
a
l
v
e
s
ho
u
l
d
be
in
s
t
a
ll
ed
be
t
w
ee
n th
e
th
r
ust
s
il
e
n
ce
r
a
n
d
th
e
non-
r
e
t
ur
nv
a
l
v
e
as
s
h
o
wn in the dia
g
ra
m
.
g
Wh
e
n th
e
bl
ow
a
l
v
e is o
p
en
.
Wh
e
n th
e
bl
ow
e
r i
s
s
t
ar
ted u
p
, the air esca
p
e
s
t
h
r
e
p
asses th
r
a
l
v
e chamber
.
rr
This
pr
o
duces
d
y
namic p
r
essur
w
a
y
that it is comp
r
essed
do
wn
w
a
r
ds
a
n
d
c
lo
ses
th
e
v
a
l
v
e.
T
h
e
v
a
l
v
e
r
eac
tion tim
e
i
s
r
e
g
ulated b
y
the bolt
(p
os.
11
)
in
suc
h
a
w
a
y that the
gr
eater the d
y
namic p
r
essur
e
th
e
fas
t
e
r th
e
v
a
l
v
e
is closed. Once the d
y
namic p
r
essur
e
h
as
bee
n
r
e
g
ulated, the nut (pos.
1
0
)
should b
e
t
i
g
htened to block the system,
av
oidin
g
a
n
y
v
a
r
i
a
tio
n
in th
e
af
or
ementioned
pr
essur
e.
1. Bod
y
2. L
ow
e
r nozzl
e
3
.
C
hambe
r
4. S
pr
in
g
5. U
pp
er nozzl
e
6
. Membran
e
7.
S
er
v
o
c
ov
e
r
8. Rin
g
sea
l
9
. Air outle
t
1
0
. N
u
t
1
1. B
o
l
t
S
ucti
o
n
s
il
e
n
cer
Thr
ust
s
il
e
n
cer
R
e
li
e
f v
a
lv
e
Non-r
e
t
u
r
n
v
a
lv
e
S
afe
t
y
v
a
lv
e
Blow
er
Ai
r
filt
e
r
General
The PG unloading valve removes the air produced
when the blower is started up. This aliminates the
negative effect of the overload resulting from the
counter-pressure at start-up as weell as a gradual
start-up.
Installation
The relief valve should be installed between the thrust
silencer and the non-return valve as shown in the diagram.
Functioning
When the blower is stopped, the valve is open.
Whwn the blower is started up, the air escapes through the
conduit (pos. 9) and at the same time passes throgh the
valve chamber. This produces dynamic pressure, which
acts on the top of the membrane (pos. 6) in such a way that
it is compressed downwards and closes the valve.
The valve reaction time is regulated by the bolt (pos. 11)
in such a way that the greater the dynamic pressure the
faster the valve is closed. Once the dynamic pressure has
been regulated, the nut (pos. 10) should be tightened to
block the system, avoiding any variation in the
aforementioned pressure.

15.1 VIEW OF PROTECTION FILTER
SUCTION
FLANGE
REMOVABLE
COVER
PROTECTION
FILTER
SAFETY
VALVE
INSULATING
MATERIAL
DIMENSIONS OF STARTER FILTER
CARTRIDGE
(NEGATIVE PRESSURE)
(measurements in mm)
DN øA øB L
50 60 11 170
80 80 11 180
100 110 14 200
150 160 14 310
200 210 18 340
250 290 18 470
300 320 18 530
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