GMV DLV-A3 User manual

GMV SPA
FLUID DYNAMICS EQUIPMENTS
AND COMPONENTS FOR LIFTS
UNI EN ISO 9001
Certified Company
ENG
English
DLV VALVE
DLV-A3 VALVE MANUAL
I NSTALLATION AND U SE
1 0991 486 EN
A VAILABLE WITH VALVE TYPE
3010 ¾”,1 1/4”, 1 ½”, 2”, NGV ¾”

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DLV VALVE MANUAL
I NSTALLATION , U SE AND M AINTENANCE
INDEX
0 GENERAL SECTION 3
0.1 INTRODUCTION 3
0.2 INSTALLATION RELATED DOCUMENTS 3
0.3 SAFETY PRECAUTION DURING INSTALLATION 3
0.4 GENERAL ORDERS 4
0.5 LIABILITY AND WARRANTY 4
1 FEATURES AND REQUIREMENTS 4
1.1 DLV A 3 VALVE 4
1.2 DELIVERY PACKAGING 5
1.3 IDENTIFICATION PLATE 5
1.4 T HE FLUID 5
1.5 CLEANING AND SAFETY PROTECTIONS 6
2 DLV A3 WORKING DESCRIPTION 6
2.1 DESCRIPTION 6
2.2 HYDRAULIC SCHEME 7
2.1 SEMPLIFIED HYDRAULIC SCHEME 7
3 INSTALLATION 8
3.1 H YDRAULIC CONNECTION SAMPLES 8
3.2 D IMENSIONS 9
4 ELETTRICAL CONNECTIONS 9
4.1 ELECTRICAL GETTING STARTED : ICONS 10
5 TEST AND ADJUSTMENTS 10
5.1 MONITORING SYSTEM CHECK 10
6 CERTIFICATES 11

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0GENERAL SECTION
0.1 INTRODUCTION
Assembling,installation,start-up and hydraulic lift maintenance should be performed by experienced
personnel.Before starting any work on the hydraulic components,personnel showld carefully read these
instructions,particularly referring to 0.3 chap. “Safety precautions”.
This “Instruction Manual” in an integral part of the lift and should be protected and accessible.
DLV is a non return electrically-controlled valve,working in series with the main valve to stop the lift during an
unintended car movement from the floor.
DLV valve prevent only the downward unintended car movement.
The purpose of the valve is to work together with the main valve according to the Lift European Standards EN
81.2:1998 + A3:2009 which states that “in case of use of two electro-valves working in series, the self control
implies the separate verification of the opening and closing of each single valve when the car is empty. If a
fault is detected, the subsequent movement of the lift must be avoided”
0.2 INSTALLATION RELATED DOCUMENTS
The documents to use for the installation are those required by the EN81-2:1998 and by the rules in force,
particularly the following:
T HIS INSTALLATION MANUAL
W IRING AND HYDRAULIC DIAGRAMS (EN81-2:1998 16.2 A ) 6 AND 7).
All the documentation for a correct and safe installation, must be stored by the installation responsible.
Please remember that this documentation is considered part of the plant and must be complete, well stored
and unabridged in every part.
In order to maintain the readability, the documentation shouldn’t be damaged and shouldn’t have missing
parts. Moreover, do not tear or deteriorate sheets during consulting.
0.3 SAFETY PRECAUTION DURING INSTALLATION
Installers and maintenance staff are completely responsible for their own safety during their activities.They
should follow all the safety official rules to prevent accidents to the working staff.
In these instructions,the major points concerning the working safety and prevention,will be marked by the
following symbols:

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DLV VALVE MANUAL
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0.4 GENERAL ORDERS
The valves shall be maintained in good working order in accordance with the European Standards.
To this effect, regular maintenance of the installation shall be carried out, to ensure, in particular, the safety of
the installation.
The safety of an installation shall take into account the ability to be maintained without causing injury or damage
to health.
Regular maintenance of the installation shall be carried out to ensure the reliability of the installation.
The access and the associated environment shall be maintained in good working order.
The competence of the maintenance person within the maintenance organization shall be continuously updated.
0. LIABILITY AND WARRANTY
These instructions are intended for people with experience in installation, adjustment and maintenance of
hydraulic lifts.
GMV disclaims any liability for damage caused by improper or different use from what described in these
instructions or inexperience or carelessness of those responsible to assemble, adjust or repair hydraulic
components.
GMV's warranty is voided if you install any components or parts not original, if you make unauthorized
changes or modifications or made by unauthorized or unqualified personnel.
Unless otherwise indicated, the following situations are forbidden for safety reasons:
- Any product modification;
The installation of the product for purposes other than those described;
Damage to the joints;
Carrying out maintenance or inspections improper or inadequate;
The use of improper accessories and not original spare parts or materials from GMV.
NOTES
Indicates information which contents must be seriously taken in consideration.
WARNING
Indicates that the described operation may cause, damages to the system or physical damages if
performed without complying with the safety standards.
To install or replace system components,we should pay attention to the following measures:
-Make the car lift rest on the buffers
-make sure the lift shouln’t be unintentionally powered,locking the main switch
-bring to zero the pressure before opening the hydraulic circuit,removing cups,unscrewing fittings
-In case of welding,be care the slags do not get in touch with the fluid,the jask and the gaskets
-Remove the fluid in excess,the leakages,keep clean the system to find out and consequently remove the
leakages
WARNING
Before starting all kind of installation operation:
ALWAYS verify that all the safety devices, mechanical or electrical, are active and working properly
1FEATURES AND REQUIREMENTS
1.1 DLV A3 VALVE
The DLV A3 is a pilot-operated non-return valve that must be mounted
between the cylinder and the 3010 control valve or any other control valve
for lifts,traditional or electronic.
The valve should be installed as close as possible to the main hydraulic block
but in special cases can be installed also close to the cylinder without
compromising its function.
During the upward phase it works as a normal non-return valve . So the
pressure of the oil sent from the pump can control the opening degree.
In down direction however, when energized, the valve allows the passage of
oil from the cylinder to the main block and then into the tank.When de-
energized, the solenoid valve immediately closes and stops the car.

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DLV are manifactured in different sizes and can be used for the following range(see the tab. 1).
Type Max
interv.flow Nominal flow Working press. Working temp. Viscosity Tens.DLV Power Emerg. Pw.
l/min bar °C cSt Vdc Vac W Vdc
DLV A3 – ¾”
45 8 - 45
12 - 45 5 - 70
14-290
(ISO VG 46
I≈120)
24-12
48-12
80-12
90-12
110-12
180-12/24
110
220
230
30
12 24
DLV A3 - 1” ¼
210 15 - 210
30
DLV A3 - 1” ½
430 25 - 430
30
DLV A3 - 2”
600 30 - 600
45
Tab. 1
1.2 DELIVERY PACKAGING
Upon picking up the material,before signing the delivery,be care the goods match the packing list and the order
list.
The packing list should includes:
- Installation use and maintenance manual
- DLV device (factory assembled)
- Connection fittings
- Cartboard box
1.3 IDENTIFICATION PLATE
The indentification plate with the main factory data (see picture below), is directly placed on DLV.
The plate should include:
-Type of DLV device
-Serial number
-Year manifacturing
-Flow range
-Max static pressure
1.4 THE FLUID
The hydraulic fluid is very important for an hydraulic lift
Especially in systems with medium or intensive traffic,choosing a good fluid increases the temperature range of
comfortable working and enhances the service life of the components.
When we choose the fluid we must take into account both the characteristics of the elevator
(temperature , power unit ventilation room, amount of trafic) and the characteristics of the fluid
(temperature-viscosity).In case of replacement,follow the local pollution.Waste should be placed in a
proper box to protect the environment.

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DLV VALVE MANUAL
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GMV use and recommend an hydraulic fluid ISO VG 46 that :
•Thanks to classification as category HEES, as rule ISO-UNI 6743-4 and its
biodegradability index > 90%, according to standard CEC L33-A-93, is
acceptable from an environmental point of view.
•Thanks to the synthetic base (ISO VG 46 ) and its viscosity index (>140),
higher than the traditional mineral oil, allowing greater stability, ensuring
better performance against wear and aging on systems as lifts for
persons and goods, in accordance with the environmental directive
2006/118/EC.
•Thanks to a flash point above 220°C compared to the 140°C of the
traditional mineral oil it is safer and reduces the risk of fire.
1. CLEANING AND SAFETY PROTECTIONS
Ensure there is no dirty inside.The impurities could damage the sealing of the piston and of the valve block and
can cause failures.All the components to remove for control and repair,should be clean before the re-
installation.
Any leakage of fluid should be adsorbed with rags during the maintenance to avoid any release.
2DLV A3 WORKING DESCRIPTION
2.1 DESCRIPTION
The DLV A3 is a pilot-operated downward non-return valve,normally closed,primarly made by an aluminium
body.
The F side must be connected to the primary valve.The H side must be connected to the ball valve and then to
the jack (see pict. 2 in sect.).Here below is shown the flow upward
Pict 1
So let’s see what must be done during the normal working of the lift :
Upward:If the DLV A3 works as a standard non-return valve opening by the oil pressure,nothing is requested.
Downward:the valve DLV A3, has two working ways:
1. Contemporaneous
The DLV A3 is energized and de-energized at the same time of the main downward solenoid valve VMD.
In this way both valves are working as hydraulic valves in series and they require to be monitored. The
monitoring requires the type examination certificate. This monitoring must be done once a day by performing
(automatically)a specific sequence of actions.
[F] IN
[H] OUT

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2. Timed
The DLV A3, respect to the main downward solenoid valve VMD, is energized about 1 second before and
de-energized almost 2 seconds after the arrival at landing.
In this way the DLV A3 is not an element working to control the lift and consequently does not require any
kind of monitoring. Its correct working can be verified during the standard maintenance operations every 6
months.
A3 intervention state of DLV
In the shaft must be present a system (ex. two contacts/switches) able to detect the unintended movement of
the car with open doors in up or down direction.
During an unintended movement in down direction, when the unintended movement is detected, the system
de-energize the DLV A3 valve to let it close and stop the lift.
During an unintended movement in up direction the system must switch off the motor/pump to stop this
movement. Consequently the valve will stop the car.In every case,after this phase,the system should go out of
service and it should be restored only by an authorized and properly trained person. The system which detects
the unintended movement and energizes the stopping device can be the existing one just used to define the
opening doors zone. The intervention zone, according to the EN 81-2, must be at maximum ± 200 mm from the
landing
2.2 HYDRAULIC SCHEME
Here below (pict.3) follows the DLV hydraulic scheme to show the placing of DLV,between the main valve and
the jack.
Legend
Pict. 1
PT Pressure trasducer
DLV Non return pilot-operated valve
R/S Shut off valve/Silencer
VC Check valve
ISP Inspection pressure gauge fitting
MAN Pressure gauge
Pmax Maximum pressure switch
Pmin Minimum pressure switch
OLD Overload pressure switch
J Jack
[F] DLV connection main valve side
[H] DLV connection main jack side
2.1 SEMPLIFIED HYDRAULIC SCHEME
DLV A3 Non return pilot valve
VAL Main valve
J Jack
VAL
DLV A3
J
[H]
[F]

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DLV VALVE MANUAL
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3INSTALLATION
ATTENZIONE
During the installation:nvere exclude safety devices and never power-on the motor pump.
3.1 HYDRAULIC CONNECTION SAMPLES
DLV A3 - 3010 – MR with cabinet up to 150 lt DLV A3 - 3010 – MR no cabinet from 180 to 210 lt
DLV A3 - 3010 - MRL MC with cabinet up to 150 lt DLV A3 - 3010 - MRL MC no cabinet 180/210 lt

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3.2 DIMENSIONS
H T
B
A
H
VH B
B
A B
D B
B A
A A
A F
B F
M8x1.25
D A
C
VB
DLV A B C H H
T
D
A,
D
B
A
A,
A
B
B
A
B
B
A
F,
B
F
¾” 120 54 ≈6,5 54 175 ¾” G 26 48 19
1” ¼ 153,5 80 ≈13 70 192 1” ¼ G 35 67,5 28,5 53
1” ½ 185 90 ≈9 90 212 1” ½ G 45 73 32 -
2” 204 90 ≈15 115 237 2” G 57,5 89,25 39,5 -
4ELETTRICAL CONNECTIONS
Mode 1
E N 8 1 -2
V M D D L V A 3
+
-
2
Contemporaneous
EN81-2 CD LD
Safety chain Car door safety Landing door safety
Mode 2
EN81-2
VM D D LV A3
ON +1s
OFF O N OFF + 2s
-
+
3
C O NTR O LLE R
DLV A3
VM D
ON
OF F
ON
OF F
Timed
INSTALLATION NOTES
Mode 1:to correctly install the DLV A3 on the valves 3010, 3100, GEV or similar, the following
devices (if presents) must be mounted, or transferred on the DLV:
- Pressure overload (installation on the DLV A3 optional if Mode 2)
- Pressure transducer (installation on the DLV A3 optional if Mode 2)
- Pressure gauge and pressure gauge inspection EN (installation on the DLV A3 recommended)
All above to provide a correct reading of the pressure value.

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DLV VALVE MANUAL
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4.1 ELECTRICAL GETTING STARTED:ICONS
0 - OFF 0 - OFF
+
TEST AND ADJUSTMENTS
.1 MONITORING SYSTEM CHECK
To assure the correct working of the monitoring system of the DLV A3 the control panel should perform a
check operation behind closed doors, at least once a day.
The control panel, during the
test, must:
1. To move the car to the
lower floor
2. To close the doors
3. Wait that the system turns
into the “Free” status
4. Start the test following the
scheme ->
5. At the end of the test, if the
system is not in the “Out of
service” status, turn the
system in normal use.
If the control panel
receives a command
from a push-button
panel during the test,
stop the test, execute
the command (order /
call) and at the end,
restart from point 1
]x[ = Close
]↕[ = Open
 = NO
 = YES
R _↑ = Relevelling
L --►-- = Return at landing
With the car stopped at landing,energize only the DLV A3 valve,holding the main valve VMD de-energized.If all
the components work correctly,the car must stop at landing position.A timed check starts for two sec.to verify a
car movement.In case of movement detection without landing,the system must go into alarm and put the lift out
of service.In case of back-landing,another 2 seconds timed check starts,energizing the the DLV.If the relevelling
does not start,the system is ok.Otherwise,a VMD failure is confirmed (DLV de-energized).

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In the same way,is energized only the main valve VMD,holding the DLV A3 valve de-energized.If all the
components work correctly,the car must stop at landing position.A timed check starts for two sec.to verify a car
movement.In case of movement detection without landing,the system must go into alarm and put the lift out of
service.In case of back-landing,another 2 seconds timed check starts,energizing the VMD.If the relevelling does
not start,the system is ok.Otherwise,a DLV failure is confirmed (VMD de-energized).
6CERTIFICATES

Doc. n° 1 0991 486 EN Rev. 0.0 - 29.09.2016 File: DLVA3-02-10991486EN.doc - (J30)
FLUID DYNAMICS EQUIPMENTS
AND COMPONENTS FOR LIFTS
All rights reserved.
Any kind of exploitation in any form and by any means is forbidden without a written permission of GMV Spa.
GMV Spa, within technical or manufacturing progress, reserves the right to modify parts or this manual without notice.
Drawings, descriptions and data included in this manual are indicatives.
For all the data not included in this manual refer to the documents of any single part.
To guarantee the products security, do not use spare parts not genuine or not approved by GMV Spa.
GMV Spa will not assume any responsibility if the instructions included in this manual are not observed.
Information and support:
GMV SPA
V IA D ON G NOCCHI , 10 - 20016 PERO – M ILANO I TALY )
TEL. [phone] - FAX [phone]
HTTP :// WWW . GMV . IT - E - MAIL : INFO @ GMV . IT
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EN ISO 9001
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