Blain Hydraulics EV Series User manual

1
BLAIN HYDRAULICS
· Pfa enstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
BLAIN VALVES
FOR HYDRAULIC
ELEVATORS
Excellence in Simplicity and Performance
www.blain.de
Pfa enstrasse 1 · 74078 Heilbronn · Germany
Tel.: [phone] · Fax: [phone]
SERVICE
MANUAL

2
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001 Service Manual
GmbH
!
Caution
Only qualified elevator mechanics are permitted to install and adjust elevator control valves and controllers.
Every Blain control valve is subjected to strong quality standards, from production, adjustment and testing, to final
shipment.
This manual will provide assistance whenever servicing is required. If necessary, please contact our technical de-
partment, stating the valve number, which is engraved into the EV casting above the nameplate, as well as other
related technical data.
Blain Hydraulics GmbH Tel. [phone]
Pfaenstrasse 1 Fax [phone]
74078 Heilbronn www.blain.de
Germany [e-mail]
Designer and Manufacturer of the highest
quality control valves & safety components
for hydraulic elevators
Elevator Valve EV & KV
Page
3 Contacts at Blain
4 EV ¾" Cross Section Diagrams of Valve
5 EV 1½" - 2½" Cross Section Diagrams of Valve
6+7 Quick Adjustment Procedure
8 Switches, Slow Down Distances
9 EV Trouble Shooting, Up Travel
10 EV Trouble Shooting, Down Travel
11 EV System Leakage
12 EV Spare Parts List
13 Down Levelling Adj. 9, Replacement
14 KV Cross Section Diagrams of Valve
15 KV Trouble Shooting, Up Travel
16 KV Trouble Shooting, Down Travel
17 KV System Leakage
18 KV Spare Parts List
19 KS Slack Rope Valve Purpose and Adjustment
20 Overheating of Power Units
21-30 CAD Drawings
31 EV ¾" O-ring template
32 EV 1½"-2" O-ring template
33 L10 ¾" O-ring template
34 HP O-ring template
35 Flow-Pressure-Tables (metric)
36 Flow-Pressure-Tables (USA)
Content

3
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
Contacts at Blain
mar 19 BLAIN HYDRAULICS Designer and Manufacturer of High Quality Valves for Hydraulic Elevators Printed in Germany
Contacts at Blain
Technical support
Mechanical valves
Mr. Jochen Greiner
[phone] | [e-mail]
Mr. Frank Pausder
[phone] | [e-mail]
Mr. Lothar Nickel
[phone] | [e-mail]
Mr. Uwe Wacker
[phone] | [e-mail]
Mr. Gary Miklaszewski
[phone] | [e-mail]
Mr. Parag Mehta
[phone] | [e-mail]
Dr. Ferhat Celik
[phone] | [e-mail]
Mr. Chris Quellmalz
[phone] | [e-mail]
Servo electronic valves & EV4 VVVF
Dr. Ferhat Celik
[phone] | [e-mail]
Mr. Frank Pausder
[phone] | [e-mail]
Mr. Gary Miklaszewski
[phone] | [e-mail]
Mr. Chris Quellmalz
[phone] | [e-mail]
Graphics
Mrs. Manuela Baumhauer
[phone] | [e-mail]
IT
Mr. Isen Callaki
[phone] | [e-mail]
Managing Director/CEO
Mrs. Anja Blain
[phone] | [e-mail]
Sales
South America
Mrs. Marissa Steurer
[phone] | [e-mail]
Europe
Mrs. Bärbel Buch
[phone] | [e-mail]
Mrs. Marissa Steurer
[phone] | [e-mail]
Mrs. Heike Geywitz
[phone] | [e-mail]
Mr. Marvin Voss
[phone] | [e-mail]
Asia / Middle East / North America
Mrs. Bärbel Buch
[phone] | [e-mail]
Mr. Marvin Voss
[phone] | [e-mail]
Mrs. Heike Geywitz
[phone] | [e-mail]
Mrs. Marissa Steurer
[phone] | [e-mail]
Australia / Polynesia
Mrs. Bärbel Buch
[phone] | [e-mail]
Mr. Marvin Voss
[phone] | [e-mail]
Spare Parts
Mrs. Ruth Braun
[phone] | [e-mail]
Mrs. Petra Wahl
[phone] | [e-mail]
Purchase
Mr. Lothar Nickel
[phone] | [e-mail]
Finance / Accounting
Mrs. Claudia Ihle
[phone] | [e-mail]
Mrs. Petra Wahl
[phone] | [e-mail]

4
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
Steuerelemente
AMagnetventil (Halt oben)
BMagnetventil (Abbremsen auf)
CMagnetventil (Abbremsen unten)
DMagnetventil (Halt unten)
HNotablassventil
SÜberdruckventil
UUmlaufkolben
VRückschlagventil
W Schleichfahrtventil (auf)
XSenkkolben
YSchleichfahrtventil (ab)
Einstellungen AUF
1Umlaufeinstellung
2Anfahrdrossel
3Abbremsdrossel
4Schleichfahrteinstellung
5Haltedrossel
Einstellungen AB
6Anfahrtdrossel
7Senkfahrteinstellung
8Abbremsdrossel
9Schleichfahrteinstellung
Druck
Pumpe
Umlaufkolben
Schleichfahrt (Auf)
Tank
Zylinder
Senkkolben
Schleichfahrt (Ab)
Elevator Valve - EV 100 3/4’’
for Home Lifts
7
W
U
Y
X
1
2
P
8
9 4
V
T
Z
6 3
HS5
A
B
C
D
5
2
S
3
H
8
6
A
BC
D
Elementos de mando
AVálv. magnética ‘parada’ (arriba)
BVálv. magnética ‘frenado’ (subida)
CVálv. magnética ‘frenado’ (bajada)
DVálv. magnética ‘parada’ (abajo)
HVálv. parada de urgencia (manual)
SVálv. de seguridad
UVálv. de desviación
VVálv. de retención
W Válv. de subida lentísima
XVálv. de bajada
YVálv. de bajada lentísima
Ajustes SUBIDA
1Desviación
2Arranque
3Frenado
4Recorrido lentísimo
5Parada
Ajustes BAJADA
6Arranque
7Recorrido en bajada
8 Frenado
9Recorrido lentísimo
Presión
Bomba
Válvula de desviación
Subida lentísima
Tanque
Cylindro
Válvula de bajada
Bajada lentísima
Vertical
Section
Horizontal
Sections
PPump Port
TTank Port
ZCylinder Port
Control Elements
ASolenoid (UP Stop)
BSolenoid (UP Deceleration)
CSolenoid (Down Deceleration)
DSolenoid (Down Stop)
HManual Lowering
SRelief Valve
UBy Pass Valve
VCheck Valve
WLeveling Valve (Up)
XFull Speed Valve (Down)
YLeveling Valve (Down)
Adjustments UP
1By Pass
2Up Acceleration
3Up Deceleration
4Up Leveling Speed
5Up Stop
Adjustments DOWN
6Down Acceleration
7Down Full Speed
8Down Deceleration
9Down Leveling Speed
Eléments de commande
A Electro-vanne ‘arrêt’ (en n de montée)
BElectro-vanne ‘ralentissement’ (montée)
CElectro-vanne ‘ralentissement’ (descente)
D Electro-vanne ‘arrêt’ (en n de descente)
HDescente de secour (homme mort)
SValve de sécurité
UBy-pass
VClapet anti-retour
W Soupape montée petite vitesse
XSoupape descente
YSoupape descente petite vitesse
Réglages MONTÉE
1By-pass
2Etrangleur de démarrage
3Etrangleur de ralentissement
4Réglage de petite vitesse
5Etrangleur d’arrêt
Réglages DESCENTE
6Etrangleur de démarrage
7Réglage de grande vitesse
8 Etrangleur de ralentissement
9Réglage de petite vitesse
Pression
Pompe
By-pass
Montée petit vitesse
Cuve
Vérin
Soupape descente
Descente petite vitesse
Pressure
Pumpe
Bypass Valve
Up Leveling
Tank
Cylinder
Down Valve
Down Leveling
C
DAB

5
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
7
W
U
Y
X
1
2
P
8
94
V
T
Z
6 3
HS5
A
B
C
D
5
2
S
3
H
8
6
ABCD
Steuerelemente
AMagnetventil (Halt oben)
BMagnetventil (Abbremsen auf)
CMagnetventil (Abbremsen unten)
DMagnetventil (Halt unten)
HNotablassventil
SÜberdruckventil
UUmlaufkolben
VRückschlagventil
W Schleichfahrtventil (auf)
XSenkkolben
YSchleichfahrtventil (ab)
Einstellungen AUF
1Umlaufeinstellung
2Anfahrdrossel
3Abbremsdrossel
4Schleichfahrteinstellung
5Haltedrossel
Einstellungen AB
6Anfahrtdrossel
7Senkfahrteinstellung
8Abbremsdrossel
9Schleichfahrteinstellung
Druck
Pumpe
Umlaufkolben
Schleichfahrt (Auf)
Tank
Zylinder
Senkkolben
Schleichfahrt (Ab)
Pression
Pompe
By-pass
Montée petit vitesse
Cuve
Vérin
Soupape descente
Descente petite vitesse
Elevator Valve
EV 100 1½’’, 2’’, 2½’’
Control Elements
ASolenoid (UP Stop)
BSolenoid (UP Deceleration)
CSolenoid (Down Deceleration)
DSolenoid (Down Stop)
HManual Lowering
SRelief Valve
UBy Pass Valve
VCheck Valve
WLeveling Valve (Up)
XFull Speed Valve (Down)
YLeveling Valve (Down)
Adjustments UP
1By Pass
2Up Acceleration
3Up Deceleration
4Up Leveling Speed
5Up Stop
Adjustments DOWN
6Down Acceleration
7Down Full Speed
8Down Deceleration
9Down Leveling Speed
Pressure
Pumpe
Bypass Valve
Up Leveling
Tank
Cylinder
Down Valve
Down Leveling
Eléments de commande
A Electro-vanne ‘arrêt’ (en n de montée)
BElectro-vanne ‘ralentissement’ (montée)
CElectro-vanne ‘ralentissement’ (descente)
D Electro-vanne ‘arrêt’ (en n de descente)
HDescente de secour (homme mort)
SValve de sécurité
UBy-pass
VClapet anti-retour
W Soupape montée petite vitesse
XSoupape descente
YSoupape descente petite vitesse
Réglages MONTÉE
1By-pass
2Etrangleur de démarrage
3Etrangleur de ralentissement
4Réglage de petite vitesse
5Etrangleur d’arrêt
Réglages DESCENTE
6Etrangleur de démarrage
7Réglage de grande vitesse
8 Etrangleur de ralentissement
9Réglage de petite vitesse
Presión
Bomba
Válvula de desviación
Subida lentísima
Tanque
Cylindro
Válvula de bajada
Bajada lentísima
Elementos de mando
AVálv. magnética ‘parada’ (arriba)
BVálv. magnética ‘frenado’ (subida)
CVálv. magnética ‘frenado’ (bajada)
DVálv. magnética ‘parada’ (abajo)
HVálv. parada de urgencia (manual)
SVálv. de seguridad
UVálv. de desviación
VVálv. de retención
W Válv. de subida lentísima
XVálv. de bajada
YVálv. de bajada lentísima
Ajustes SUBIDA
1Desviación
2Arranque
3Frenado
4Recorrido lentísimo
5Parada
Ajustes BAJADA
6Arranque
7Recorrido en bajada
8 Frenado
9Recorrido lentísimo
Horizontal
Sections
PPump Port
TTank Port
ZCylinder Port
Vertical
Section
D C B A

6
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001 Quick adjustment
procedure
Solenoid Coils
During adjustment of the EV 100 valve, instead of making a full oor to oor travel to check operation, much time can be saved by
removing the securing nuts of the coil and switching to deceleration or to acceleration by lifting or replacing the appropriate coil by
hand, allowing several adjustment corrections during one car travel between oors.
Caution: Once removed from the solenoid tube, the energised coil will begin to overheat after about 10 s.
If necessary, to slow the rate of heating, place an 14 or 17 mm socket key or similar steel rod as core thru the coil.
Do not lay an energised coil to one side, otherwise it may overheat unnoticed.
If the coil becomes too hot to hold, it must be replaced, back over the solenoid tube and any further adjustment carried out with
the elevator making normal oor to oor runs.
Car not visible from Machineroom
If the car cannot be seen during adjustment of the valve, the acceleration and deceleration times can be heard from the change
of the turbulent noise within the valve as the speed of the car changes. With no load in the car, the duration of the speed changes
should be about 2.5 seconds. This applies to adjustments 2, 3, 6 and 8.
Up Travel (empty car)
1. Pilot Pressure Setting
Disconnect coil A. Energise Motor (pump).
If the car does not move, turn No. 1‘in’ until the car begins to move, turn No. 1‘out’ until the car stops, then back out again ½ turn.
The car remains standing still.
DO NOT UP-LEVEL WITH THIS ADJUSTMENT! Between full and empty car, levelling speed di󰀨erences would be extreme.
2. Up Acceleration
Reconnect coil A. Start Motor and energise coil Aand B(normal ‘up’ call).
Observe the up acceleration. If it is too quick, turn No. 2‘in’ ½ turn. If it is too long, turn No. 2‘out’ ½ turn.
Repeat until acceleration is satisfactory. Acceleration time should be about 2.5 s.
3. Up Deceleration
With coil Bstill disconnected. Energise motor and coil A(normal ‘up-level’ call).
The car will travel upwards at levelling speed. Turn No. 3‘in’ until the car starts to up level faster, then
turn No. 3‘out’ until the original levelling speed is observed. Reconnect coil Band place a normal up call.
Observe the deceleration of the car. If it is too long, turn No. 3‘out’ ¼ turn; if it is too short, turn No. 3‘in’ ¼ turn.
Repeat until deceleration is satisfactory. Deceleration time should be about 2.5 s.
Z1 Z1
6
8
7
94
1
3
2
5
S
DCABDC A
B
1
2
5
S
94 3
6
8
7
PRE-SETTINGS EV 100 ¾“ EV 100 1½“ - EV 100 2½“
Adjustment No. 1 level with ange face 5 mm Socket key
Adjustment No. 2 all the way ‘in’ then 1.5 turns ‘out’ then 2 turns ‘out’ 3 mm Socket key
Adjustment No. 3all the way ‘in’ then 1.5 turns ‘out’ then 2.5 turns ‘out’ 3 mm Socket key
Adjustment No. 4 level with ange face 5 mm Socket key
Adjustment No. 5all the way ‘in’ then 1.5 turns ‘out’ then 2.5 turns ‘out’ 3 mm Socket key
Adjustment No. Sall the way ‘in’ then 1.5 turns ‘out’ then 1.5 turns ‘out’ 3 mm Socket key

7
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
Quick adjustment
procedure
4. Up Levelling
Disconnect coil B. Energise Motor and coil A (normal ‘up-level’ call).
With adjustment No. 4 level with the face of the ange the car will up level. If the levelling speed is too fast,
turn No. 4‘in’ until the speed is as required. If the speed is too slow, turn No. 4‘out’. Recommended speed 6 cm/s.
5. Up Soft Stop
Disconnect coil A. Energise Motor.
The car should not move. Turn No. 5‘in’ until the car starts upwards then turn No. 5 ‘out’ until the car stops.
Reconnect coil A. Energise Pump-Motor and A. The car will travel upwards at levelling speed.
Lift A coil by hand briey and observe the stopping of the car. If the stop is too hard turn No. 5‘in’ ¼ turn.
If the stop is too soft, turn No. 5 ‘out’, ¼ turn. Repeat until the stop is satisfactory.
S Pressure Relief Valve
Turn Sscrew ‘out’ until about 2 mm of the screw head is showing. Close the ball valve in the cylinder line
and open the manual lowering Hto lower valve pressure down to zero. Place an up call, energising motor
and coils Aand B. The relief pressure will show on the pressure gauge.
To increase the relief valve setting, turn S‘in’.
To decrease the relief valve setting, turn S ‘out’, then open the manual lowering for ½ second with the pump
still running to release locked-in pressure, before observing the pressure gauge reading.
7. Down Full Speed
Place down call (coils Cand Denergised).
Observe full down speed. Turn No. 7 ‘in’ for slower, ‘out’ for faster speed.
8. Down Deceleration
Place down call (coils Cand Denergised).
As the car approaches full speed, remove coil D by hand briey from the solenoid and observe the deceleration of the car.
If the deceleration is too long, turn No. 8‘out’ ¼ turn; if it is too short, turn No. 8 ‘in’ ¼ turn.
Caution. Never close adjustment & completely(in). This will cause damage to the car.
Repeat until deceleration is satisfactory. Deceleration time should be about 2.5 secs.
9. Down Levelling Speed
Disconnect coil C. Place down call (Denergised).
Observe down levelling speed. Turn No. 9‘in’ for slower, ‘out’ for a fast down levelling speed.
Recommended speed 6 cm/s.
Note: The manually operated down speed is 6cm/s.
6. Down Acceleration
Turn No. 6all the way ‘in’. Place down call (coils Cand Denergised).
The car will not move. Turn No. 6‘out’ slowly until the car accelerates downwards.
If the acceleration is too long, turn No. 6‘out’ ¼ turn. If it is too short, turn No. 6‘in’ ¼ turn.
Acceleration time should be about 2.5 s.
H Emergency Lowering
The manually operated emergency down speed and the Dcoil operated down levelling speed are the same.
Down Stop
When solenoid Dis de-energised with solenoid Cremaining de-energised, the car will stop according to the setting of adjustment
8 and no further adjustment will be required.
KS Slack Rope Valve
The KS is adjusted with a 3 mm Socket Key by turning the screw K‘in’ for higher pressure and ‘out’ for lower pressure. With K
turned all the way ‘in’, then half a turn back out, the unloaded car should descend when the Dsolenoid alone is energised. Should
the car not descend, K must be backed o󰀨 until the car just begins to descend, then backed o󰀨 a further half turn to ensure that
with cold oil, the car can be lowered as required.
PRE-SETTINGS EV 100 ¾“ EV 100 1½“ - EV 100 2½“
Adjustment No. 7 3 mm under the ange face 5 mm Socket key
Adjustment No. 8all the way ‘in’ then 1 turns ‘out’ then 1.5 turns ‘out’ 3 mm Socket key
Adjustment No. 9 level with ange face 5 mm Socket key
Adjustment No. 6all the way ‘in’ then 1.5 turns ‘out’ then 1.5 turns ‘out’ 3 mm Socket key

8
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
Recommended distances between leveling and stop switches
Accurate landing can be a󰀨ected by di󰀨erent factors as follows:
a. If the levelling speed is fast i.e. 0,1 m/sec (20 ft/min), landing will not be as accurate as when the levelling speed is slower i.e.
0,05 m/sec (10 ft/min).
b. If the soft stop adjustment ‘5’ is set too soft, stopping will be less accurate as when ‘5’ is set for a quicker stop.
c. Particularly when the mechanic can not see the operation of the elevator car, it is possible that the elevator has not nished
decelerating from fast speed before reaching the oor. In other words, the elevator has not slowed down to its correct levelling
speed before the stop switch is actuated.
Usually, the levelling operation can be observed through the crack in the car doors. Alternatively, in the machine room, the
turbulent noise within the valve during levelling can be heard and should last 1 to 2 secs. following 2 to 2,5 secs. deceleration
time with no load in the car.
d. A di󰀨erence in landing accuracy between the elevator being loaded and unloaded, can be due to the car under load, leaning
to one side by several millimeters causing an alteration in the operating position of the stop switch by some centimetres.
Switch Distances
mtrs/sec.
0,10 5 2
0,15 10 4
0,20 15 6
0,25 18 7
0,30 25 9
0,35 30 12
0,40 40 16
0,45 46 18
0,50 50 20
0,55 58 23
0,60 70 28
0,70 80 31
0,80 95 36
0,90 105 41
1,00 120 48
With no load in the car, the deceleration time should be 2 to 2.5 secs. from full speed to levelling speed.
The levelling time should be 1 to 2 secs.
Elevator
Speed Elevator
Speed
Switch
Distance Switch Distance
20
30
40
50
60
70
80
90
100
110
120
140
160
180
200
approx.
cm approx. inches
ft/min.

9
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
EV Trouble Shooting (2019)
UP Travel
Up-start
too hard
Test: Turn adjustment 5all the way in. If the elevator now starts upwards the problem is at solenoid A.
Coil Anot energised or voltage too low.
Solenoid Atube not screwed down tight.
Solenoid A: needle AN and seat AS contaminated or damaged.
Adjustment 2(up acceleration) closed too far.
Adjustment 1opened too far. Not enough pilot pressure.
Pressure of relief valve Sis set too low.
Adjustment 8 completely closed (car sits on the bu󰀨er).
Bypass ow guide Uis too large (slots too wide).
Pump running in the wrong direction.
The pump connection ange is leaking excessively.
The pump is undersized, worn or crack in the housing.
Test: If by turning adjustment 1with the pump running the pressure does not rise above 5 bar, even with a smaller bypass
valve inserted, the problem should be sought at the pump, at the connection between the pump and the valve or the
pulsation damper, if available.
Test: Turn adjustment 3all the way in. If the elevator now travels upwards at full speed the problem is at solenoid B.
Coil Bnot energised or voltage too low.
Solenoid Btube not screwed down tight.
Solenoid B: needle AN and seat AS contaminated or damaged.
The pump connection ange is leaking excessively.
The pump is undersize or worn.
Adjustment 1closed too far.
Adjustmend 2opened too far.
O-Ring UO on bypass ow guide Uis leaking.
Star to delta motor switch period is too long.
Excessive friction on the guide rails or in the cylinder head.
Coil Bdoes not de-energise.
Adjustment 3closed too far.
O-Ring UO on bypass ow guide Uis leaking.
Coil Ais de-energised too late.
Adjustment 5(soft-stop) is closed too far.
Adjustment 1is closed too far.
Up levelling speed too high.
Coil Aand Breversed.
Up levelling speed too slow.
Middle O-Ring FO of ange 4F is leaking.
Check electrics. See Abelow.
Tighten solenoid Atube.
Clean or change needle and seat.
Turn out adjustment 2.
Adjust bypass pressure.
Set relief valve higher (turn in).
Turnoutadjustment 8.Turnin adjustment7completely
toclose thedown valve, thenturn out againto required
speed.
Insert smaller bypass ow guide
(see ‘ow guide charts’ on EV-datasheet).
Check motor direction and install the pump correctly.
Seal the pump connection.
Select bigger pump or change pump.
Tighten solenoid Btube.
Clean or change needle and seat.
Seal the pump connection.
Select bigger pump or change pump.
Adjust bypass pressure.
Turn in adjustment 2.
Change O-Ring →see EV spare parts list.
0.2-0.3 sec. is su󰀩cient.
Can not be eliminated through valve adjustment.
Check electrics. See Abelow. Slow down switch is set
to high (too late).
Turn out adjustment 3.
Change O-Ring → see EV spare parts list.
Turn out adjustment 5.
Adjust bypass pressure.
Turnin adjustment 4 until the lift stops level with the oor
or to about 0.05 m/s (recommendation).
Turn out adjustment 4until the lift stops level with the
oor or to about 0.05 m/s (recommendation).
Change O-Ring → see EV spare parts list.
No up-start
(elevator
remains
at oor)
Up-start, but
no full speed
No deceleration
into levelling
speed
Deceleration
into levelling
speed but
overtravel of
oor level
Elevator stops
before reaching
the oor
(no levelling)
Bypass-
pressure
not adjustable Insert larger bypass ow guide
(see ‘ow guide charts’ on EV-datasheet).
Restriction on the return line.
Bypass ow guide Utoo small (slots too narrow).
Levelling too fast Adjustment 4is opened too far. Turn in adjustment 4to about 0.05 m/s levelling speed.
Bypass ow guide Utoo small (slots too narrow). Insert larger bypass ow guide
(see ‘ow guide charts’ on EV-datasheet).
Enlarge return line.
To check the operation of the coils, remove hexagon nut (19 mm). By lifting the coil, the noticeable magnetic force of a live coil can be felt.
In addition, the lift function can be changed by lifting o󰀨 the coils, for example, it is possible to simulate levelling speeds, to test accelerations and decelerations.
Valves are already adjusted according to available data. Check electrical operation before changing valve settings.
Check electrics. See Abelow. Change position in the shaft.
If the coil gets too hot, the coil has to be mounted onto the solenoid and the following adjustments have to be carried out on normal travels from oor to oor until the
coil cooled down again.
Standard settings: adj. 1 level with ange face, adjust bypass pressure (see document quick adjustments); adj. 4 level with ange face, then turn out adj. 4for ½
a turn; turn in pressure relief valve Scompletely, then turn out Sfor 1½ turns; turn in adj. 2,3& 5completely, turn out adj. 3& 5for 2½ turns and turn out adj. 2for
EV ¾”: 1½ turns and for EV 1½” - 2½”: 2½ turns.
Possible cause Recommended
Problem
A
Check electrics. See Abelow.
Swap coil Aand B. See Abelow.

10
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
EV Trouble Shooting (2019)
DOWN Travel
Coil Dnot energised or voltage too low.
Adjustment 6is closed too far.
Adjustment 8is opened too far.
O-Ring UO on down valve Xis leaking.
Coil Cnot energised or voltage too low.
Adjustment 7(full speed) closed too far.
Down valve ow guide X too small (slots too narrow).
Coil Cand Dreversed.
Adjustment 9turned in too far.
Spring 9F in adjustment 9 is broken or down levelling
valve Yis blocked.
Adjustment 8closed too far. Filter of adjustment 8
contaminated or adjustment 8is damaged.
Down levelling speed is too fast.
SolenoidC:needleDNandseatDScontaminatedordamaged.
Inner O-Ring FO on ange 7F is leaking.
Solenoid Dtube not screwed down tight.
Adjustment 8is closed too far.
O-Ring XO of down valve Xis leaking.
O-Ring VO of check valve Vis leaking.
O-Ring WO of check valve Vis leaking.
Inner O-Ring FO in ange 4F is leaking.
O-Ring HO of manual lowering His leaking.
HP: Handpump is leaking.
HX/MX: Adjustment 8M turned in too far.
HX/MX: Down valve 9M is leaking.
Dirt or damage between the needle DN and seat DS.
HX/MX: O-Ring XO of down valve YM is leaking.
HX/MX: Manual lowering is leaking (HX/MX).
Contraction of oil during cooling especially from 35°C
or above.
No full speed
Deceleration into
levelling speed.
Elevator travels
though oor level
Elevator sinks
slowly due to
inner leakage
(relevelling)
Turn out adjustment 6.
Turn in adjustment 8cautiously.
Attention: Danger of travelling through!
Change O-Ring → see EV spare parts list.
Check electrics. See Abelow.
Turn out adjustment 7.
Insert larger down valve ow guide
(see ‘ow guide charts’ on EV-datasheet).
Swap coil Cand D. See Abelow.
Turn out adjustment 9to about 0.05 m/s levelling speed.
Clean the down levelling valve or change the spring.
Turn out adjustment 8 about ½ turn, clean the lter or
change adjustment 8.
Turn in adjustment 9 until the lift stops level with the oor or
to about 0.05 m/s (recommendation).
Clean or change needle and seat.
Change O-Ring → see EV spare parts list.
Tighten solenoid Dtube.
Turn out adjustment 8about ½ turn.
Clean or change needle and seat.
Change O-Ring → see EV spare parts list. When down valve
is compensated, replace down valve.
Change check valve → see EV spare parts list.
Change O-Ring → see EV spare parts list.
Change O-Ring → see EV spare parts list.
Change O-Ring HO or change manual lowering.
Seal the hand pump.
Turn out adjustment 8M.
Clean or change needle and seat.
Change O-Ring →see EV spare parts list.
Change manual lowering.
Consider oil cooler if hot oil is a problem.
Elevator sinks
due to
inner leakage
of auxiliary
equipment
Damage on down valve Xor check valve V.Check parts and change them if necessary.
No down
levelling.
Elevator stops
before oor level
For possible down leakage points see technical documentation ‘System Leakage’.
Pressure setting of KS too high. Turn out adjustment KS.
Micro drive MD, door lock valve L10 or
L20 are leaking. When possible isolate and check.
No down start
Elevator sinks
quickly
Possible cause Recommended Problem
Filter on solenoid Dcontaminated. Check lter, clean if necessary.
No deceleration into
levelling speed. Elevator
travels though oor level
SolenoidD:needleDNandseatDScontaminatedordamaged.
Filter on solenoid Dcontaminated. Check lter, clean if necessary.
Check electrics. See Abelow.
To check the operation of the coils, remove hexagon nut (19 mm). By lifting the coil, the noticeable magnetic force of a live coil can be felt.
In addition, the lift function can be changed by lifting o󰀨 the coils, for example, it is possible to simulate levelling speeds, to test accelerations and decelerations.
Valves are already adjusted according to available data. Check electrical operation before changing valve settings.
If the coil gets too hot, the coil has to be mounted onto the solenoid and the following adjustments have to be carried out on normal travels from oor to oor until the
coil cooled down again.
Standard settings: adj. 7& 9 level with ange faces, then turn out adj. 9for ½ a turn; turn in adj. 6& 8completely, then for EV¾”: turn out adj. 6for 2½ turns and turn
out adj. 8for 1turn; for EV1½” - 2½”: turn adj. 6for 2 to 2½ turns out and adj. 8for 1½ turns out.
A

11
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
EV System Leakage
(re-levelling)

12
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
EV
apr 16
GmbH
Blain Hydraulics GmbH Tel. [phone]
Pfa enstrasse 1 Fax [phone]
74078 Heilbronn www.blain.de
Germany [e-mail]
1
UF
MM
M
DR
MO
DF
DN
DK
DG
DS
MM
AD
AR
M
MO
AN
AS
AH
AF
FS
FS
Y
XXD
UD UOU 1E EO FO1F
W6 VF FO 4F FS 4E EO
FO 7F
9F
7O7EF UOXO EO9E
KS
9
7
4
C+D A+B
FD
VO WO W
3+5+6
2
S
H
8
SMMS SESF SZ SO
HO
SK
V
DC
AB
5
1
2
6
8397
DC AB
HSHS5
1
2
497 4
6
8
3
DC AB
5
1
2
4
3
HS
97
6
8
O-ring: V=FKM-Viton
P=NBR-Perbunan
Pos. No. Item
FS Lock Screw - Flange
FO O-Ring - Flange
1F Flange - By Pass
EO 0-Ring - Adjustment
1E Adjustment - By Pass
UO 0-Ring - By Pass Valve
U By Pass Valve
UD Noise Suppressor
UF Spring - By Pass
2 Adjustment - Up Acceleration
3 Adjustment - Up Deceleration
EO 0-Ring - Adjustment
4E Adjustment - Up Levelling
4F Flange - Check Valve
FO 0-Ring - Flange
VF Spring - Check Valve
W Up-Levelling Valve
WO 0-Ring - Up Levelling Valve
VO Seal - Check Valve
V Check Valve
W6 Screw - Check Valve
3 Adjustment - Up Stop
3 Adjustment - Down Acceleration
7F Flange - Down Valve
FO 0-Ring - Flange
7O 0-Ring - Adjustment
7E Adjustment - Down Valve
UO 0-Ring - Down Valve
XO Seal - Down Valve
X Down Valve
XD Noise Suppressor
F Main Filter
8 Adjustment - Down Deceleration
9E Adjustment - Down Levelling
EO 0-Ring - Adjustment
9F Spring - Down Valve
Y Down Levelling Valve
H Manual Lowering - Self Closing
HO Seal - Manual Lowering
SE Adjustment - Screw
SM Hexagonal
MS Grub Screw
SO 0-Ring - Nipple
SZ Nipple
SF Spring
SK Piston
MM Nut - Solenoid
AD Collar - Solenoid
M Coil - Solenoid (indicate voltage)
AR Tube - Solenoid 'Up'
MO 0-Ring - Solenoid
AN Needle - 'Up'
AF Spring - Solenoid 'Up'
AH Seat Housing - 'Up'
AS Seat - Solenoid Up'
MM Nut - Solenoid
M Coil - Solenoid (indicate voltage)
DR Tube - Solenoid 'Down'
MO 0-Ring - Solenoid
DF Spring - Solenoid 'Down'
DN Needle - 'Down'
DK Core - Solenoid
DG Seat Housing with Screen-'Down'
FD Filter Solenoid
DS Seat - Solenoid 'Down'
Some parts occur more than once in different
positions of the valve.
EV Spare Parts List
Adjustments
In case of down leakage, replace and test in the following order: DS & DN , XO , VO , WO , FO + HO .
Flow Valves
F Do not remove!
Solenoid Valves
Taper threads: Do not exceed 8 turns of piping
into the valve connections.
1
7
S
4
5
6
3
8
9
H
A+B
C+D
2
O-Ring-Size
No. ¾" 1 ½" 2 ½"
FO 26x2P 47x2.5P 58x3P *
EO 9x2P 9x2P 9x2P
UO 26x2V
39.34x2.62V 58x3V
WO 5.28x1.78V 5.28x1.78V 5.28x1.78V
VO 23x2,5V 42x3V 60x3V **
7O 5.28x1.78P 9x2P 9x2P
XO 13x2V 30x3V 47x3V
HO 5.28x1.78V 5.28x1.78V 5.28x1.78V
SO 5.28x1.78P 5.28x1.78P 5.28x1.78P
MO 26x2P 26x2P 26x2P
* FO by 4F 2½" is 67x2.5P
** 90 Shore
To order EV: Size (inch), valve type, state pump fl ow, empty car pressure (or fl ow guide size) and solenoid voltage.
Example order: 2"EV100, 380l/min, 18bar (empty), 110 AC or 2"EV100/4/110AC
Designer and Manufacturer of the highest
quality control valves & safety components
for hydraulic elevators
EV Spare Parts List

13
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
Down Levelling
Adjustment 9
Replacement
Old Type
1971 - 1999
Replacement not necessary
if operation is normal
New Type
from Jan. 2000
Advantages of new type
• Smoother deceleration
• Higher mechanical closing force
• Longer spring life
• Easier assembly
Identication
Identication
Identication
Old Y
Old 9F
Old 9
New Y
New 9F
New 9
2 x
4 x
In the past, a small number of the original springs No. 9F have broken. Beginning January 2000, the design of the
down levelling adjustment was modied to take a stronger spring.
The complete new adjustment is interchangeable with the original adjustment 9.
A broken spring 9 would cause the down levelling speed to be slower. No danger to passengers would arise as a
consequence.
9

14
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
KV1SKV1P
1
1
YP
U
1
9
6
5
Z
D
A
6A
D
D
HS
9
1
6
HS
9
1
5
S
KS
L
Z
FV
BV
ES
KS
EN
S
Y
V
M
DL DH HP
RS
U
1
A
5
9
6
FD
H
BV
ES
KS
EN
S
V
DL DH HP
RS
U
9
6
FD
1
M
Y
5
56
9
6
9
T
KV1P KV1S
5
H
A
D

The finest elevator control valves
Blain Hydraulics GmbH • 74078 Heilbronn • Pfaffenstrasse 1 • Germany
Tel. [phone] • Fax [phone] • www.blain.de • [email protected]

Pump
Pilot Up
Tank
Cylinder
Pilot Down
Alternative Overtravel
Pressures
Control Elements
ASolenoid Up
DSolenoid Down
FMain Filter
HManual Lowering
LGauge Shut Off Cock
UBypass Valve
VCheck Valve
YDown Levelling Valve
Adjustments
1Bypass
5Up Soft Stop
6Down Acceleration
9Down Speed
SRelief Valve
Connections
PPump
TTank
ZCylinder
Options
BV Ball Valve
HP Hand Pump
KS Slack Rope Valve
DH High Pressure Switch
DL Low Pressure Switch
RS Pipe Rupture Valve
ES Pipe Rupture Valve Switch
Motor
Pump
Pump
Motor
Pump
Residential Elevator Valves
Residential Elevator Valves KV

15
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
KV Elevator Control Valve
Trouble Shooting (2018)
UP Travel
Possible cause Recommended
Problem
Solenoid Atube not screwed down tight.
Solenoid valve A: Dirt or damage between needle and seat.
Orice in bypass valve blocked.
Adjustment 1too far back (open). Not enough pilot pressure
(minimum 5 bar) or bypass ow guide too large
(slots too wide). see*
Pressure relief valve Sis set too low.
Down valve 7or 9 are open due to contamination in their orices.
(Especially if the elevator settles back on the bu󰀨ers.
Solenoid Dis leaking.
Pump running in the wrong direction.
The pump connection ange is leaking excessively.
The pump is undersize, worn or crack in the housing.
* Test: If by turning adjustment 1with the pump running the pressure does not rise above 5 bar, even with a smaller
bypass valve inserted, the problem should be sought at the pump.
Tighten Solenoid Atube.
Clean or change needle and seat.
Withthepumprunning,turnadjustment 1in, or if already
too far in, insert smaller bypass ow guide (see the
diagram in KV literature).
Setrelief valve higher.Preadjustment alltheway in and
then 1½ turn out.
Clean or replace down valves 7(KV2 only) and 9.
Clean solenoid D.
Check motor direction and install the pump correctly.
Seal the pump connection.
Select a bigger pump or replace the pump.
No Up-Start
(Elevator
remains at oor).
Clean or change bypass valve U.
Solenoid Anot energised or voltage too low.
Test for KV1S and KV2S: Turn adjustment 5all the way in, if the elevator now starts upwards the problem is at solenoid A.
Up-Start
too hard. Adjustment 1turned in too far.
Bypass ow guide Utoo small (slots too narrow).
Star to delta motor switch period is too long.
Excessive friction on the guide rails or in the cylinder head.
Solenoid A(Up-stop) is de-energised too late.
Adjustment 1too far in.
½"pipe thread connection in return line T should not exceed
14 mm.
Turn out adjustment 1.
Change to ow guide with wider slots.
Change O-Ring →see KV Spare Parts List.
0.2-0.3 sec. is su󰀩cient.
Can not be eliminated through valve adjustment.
Open further out.
Open adjustment 1 two turns further out.
Open adjustment 1 further out.
With tape threads, 4-6 threads of engagement is
su󰀩cient.
Elevator slows
down but over
travels the oor
level.
Relief-Valve
not adjustable
to lower value.
O-ring UO on the bypass valve Uis leaking.
See below.
A
See below.
A
Elevator
doesn‘t reach
full speed.
Clean the dirt / foreign particles in the by-pass piston
orice or change the piston and turn adjustment 1out.
Bypass piston doesn´t close. Piston orice is dirty and
adjustment 1turned in too far.
Adjustment 5(Soft Stop) not far enough open (KV1S and KV2S).
For checking the operation of the solenoids, remove the top nuts. By lifting the coils a few millimetres, the magnetic pull of the coil can be felt. For testing, the
operation of the elevator car can also be controlled by lifting and replacing the coil.
Valves are already adjusted and tested. Check electrical operation before changing valve settings. Test that the correct solenoid is energised, by removing nut
and raising solenoid slightly to feel pull.
If the coil gets too hot, the coil has to be mounted onto the solenoid and the following adjustments have to be carried out on normal travels from oor to oor.
Standard settings: Adjustment 1 level with ange faces. Adjustment 5 (KV1S & KV2S) level with ange faces.
A
Bypass ow guide too large. Replace with smaller size.
Adjustment 1 Bypass not far enough open and pump ow does
not completely by-pass.

16
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
KV Elevator Control Valve
Trouble Shooting (2018)
Down Travel
A
A
Solenoid Dnot energised or voltage too low.
Problem
Adjustment 6turned in too far.
O-ring YO on down valve, leaking.
Solenoid C not energised or voltage too low.
Adjustment 7(Full speed down) turned in too far.
Solenoids Cand Dreversed.
Adjustment 9(Down levelling speed) turned in too far.
Down levelling speed 9too fast.
Solenoid Dis leaking.
Leak at N6, S6, XO, VO, WO or HO.
Other valves (ex. handpump) in the system, leaking.
Contraction of oil during cooling, especially from 35°C or above.
No Down Start
(Elevator
remains at oor).
KV2 only:
Down start but
no full speed
KV2 only:
Down full speed
but no down
levelling.
Elevator travels
through oor
level.
Leakage
(Elevator sinks).
Turn out adjustment 6.
Replace O-ring YO.
Turn out adjustment 7.
Turn out adjustment 9.
Adjust to 0.05 m/s.
Clean solenoid D; turn seat upside down or
replace needle & seat.
Replace and test in sequence.
Where possible, isolate and check.
Consider oil cooler to keep oil temperatures down.
Lift coil to check magnetic pull. See below.
A
Lift coil to check magnetic pull. See below.
Possible cause Recommended
For checking the operation of the solenoids, remove the top nuts. By lifting the coils a few millimetres, the magnetic pull of the coil can be felt. For testing, the
operation of the elevator car can also be controlled by lifting and replacing the coil.
Valves are already adjusted and tested. Check electrical operation before changing valve settings. Test that the correct solenoid is energised, by removing nut
and raising solenoid slightly to feel pull.
If the coil gets too hot, the coil has to be mounted onto the solenoid and the following adjustments have to be carried out on normal travels from oor to oor.
Standard settings: Adjustments 7 & 9, screw heads level with the hexagon heads.
A
Down piston too small.
Filter on Solenoid Dcontaminated. Clean lter.
Insert the next size higher.
Solenoid Ccontaminated
Solenoid Cdoes not de-energise. Check voltage on Solenoid C.
Clean or change needle & seat.
See below. Swap solenoid Cand D.
Only with KV2:
Brakingistoo hard
& stop is too soft.
(The elevator
travels below
oor level).
Down piston 7 (Ø 0.2mm orice; brass) & slow piston 9
(Ø 0.4mm orice; steel) are reversed. Swap piston 7& 9.
Orice in down ow guide X or down levelling ow
guide Yis blocked or contaminated. Replace piston.
Solenoid Dtube not screwed down tight. Tighten Solenoid Dtube.

17
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
KV System Leakage
(re-levelling)

18
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001 KV Spare Parts List
apr 16
KV
GmbH
Blain Hydraulics GmbH Tel. [phone]
Pfa enstrasse 1 Fax [phone]
74078 Heilbronn www.blain.de
Germany [e-mail]
AS
AH
AF
AN
MO
AR
M
AD
KV1S
KV2S
MM
A
MM
M
DR6
MO
6
DF
N6
DK
DG
S6
D
DR
MO
DF
DN
DK
DG
S6
M
MM
C5
KV1S, KV2S
S
SESMMSSOSZSFSK
H
HO
KS
1
1F1EUF UOU EO
7+9
7ESM9F MSSZ SOYOFIXTXO
Z
FZA V VO
X / Y
KV2P
KV2S
S
L KS H7
D/6 CA
1
5
KV2S
KV2P
9
Z
DH/DL
0-Ringe: 9x2 P
Z
DH/DL
L KS H S
D/6
A
KV1P KV1S
5
9
1
h
Solenoid Valves Adjustments
Parts List
Flow Valves
In case of down leakage, replace
and test in the following order:
S6, N6, HO, V complete, XO,
(2x XO with KV2).
0-Rings: 5,28x1,78 - V
0-Rings: 9x2 - P
0-Rings: 5,28x1,78 - V
0-Rings: 9x2 - P
0-Rings: 21x2 - P
Pos. No. Item
1 1F Flange - Bypass
1E Adjustment - Bypass
EO 0-Ring - Adjustment (3,5x1,5 - P)
U Flow Guide - Bypass
UO 0-Ring - Bypass (17x1 - V)
UF Spring - Bypass
5 5 Adjustment - Up Stop
6 6 Adjustment - Down Acceleration
7+9 7E Adjustment - Down Valve
9F Spring - Down Valve
YO 0-Ring - Flow Guide (10x1 - V)
XO Seal - Flow Guide (5.28x1.78 - V)
XT 0-Ring Disc
FI Filter - Down Valve
X Down Flow Guide (Brass)
Y Down Levelling Flow Guide (Steel) - KV2
Y Down Flow Guide (Steel) - KV1
S SE Adjustment Screw - Relief Valve
SM Hexagonal - Relief Valve
MS Locking Screw
SO 0-Ring - Nipple
SZ Nipple - Relief Valve
SF Spring - Relief Valve
SK Piston - Relief Valve
H H Manual Lowering - Self Closing
HO Seal - Man. Lowering (0-Ring 5.28x1.78 - V)
HA HA Adjustable Manual Lowering
KS KS Slack Rope Valve
A MM Nut Solenoid
AD Collar Solenoid
M Coil Solenoid (indicate voltage)
AR Tube Solenoid 'Up'
MO 0-Ring Solenoid
AN Needle Solenoid 'Up'
AF Spring Solenoid 'Up'
AH Seat Housing 'Up'
AS Seat Solenoid 'Up'
C+D M Coil Solenoid (indicate voltage)
C DR Tube - Solenoid 'Down', w/o adj. 6
D DR6 Tube Solenoid 'Down', with adj. 6
MO 0-Ring Solenoid
DF Spring Solenoid 'Down'
C DN Needle Solenoid 'Down'
D N6 Needle Solenoid 'Down' (Nipple)
C HN Needle Solenoid 'Down'
DK Core Solenoid 'Down'
DG Seat Housing 'Down'(Solen.D with screen)
C S6 Seat Solenoid 'Down'
C CO 0-Ring Seat Housing
Z ZA Cylinder Thread Connection
V Check Valve
VO 0-Ring Check Valve (5,28x1,78 - V)
F Main Filter
L L Gauge Shut O Cock
Designer and Manufacturer of the highest
quality control valves & safety components
for hydraulic elevators
O-ring: V=FKM- Viton
P=NBR - Perbunan

19
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001
Slack Rope Valve `KS´
Purpose
In the case of the operation of the safeties in a 1:2 hydraulic lift system where the weight of the car is no longer carried by the
ropes, the electrical supply to the elevator should automatically be switched o󰀨. As the ram comes to a stop, usually after about 60
cm, a limited slack rope condition will occur.The KS Slack Rope Valve avoids the ram being lowered by the opening of the manual
lowering valve which would otherwise cause additional slack rope. The KS Slack Rope Valve prevents the pressure holding up the
ram from being evacuated through the manual lowering valve.
Function
The KS valve is adjusted to a pressure just above the pressure produced by the weight of the ram. When under normal operating
conditions, the weight of the car acts upon the ram through the 1:2 roping, the resulting pressure is su󰀩cient to open the poppet of
the KS valve when the manual lowering His opened, allowing the car to descend as required. When however the`safeties´ have
operated and only the weight of the ram and sheave block are acting upon the hydraulic system, the resulting pressure is too low
to open the KS valve. The ram and sheave block can not be lowered.
Adjustment
The KS is adjusted with a 3 mm Socket Key by turning the screw K`in´ for higher pressure and `out´ for lower pressure. With K
turned all the way `in´, then half a turn back out, the unloaded car should descend when the Dsolenoid alone is energised. Should
the car not descend, K must be backed o󰀨 until the car just begins to descend, then backed o󰀨 a further half turn to ensure that
with cold oil, the car can be lowered as required.
Lock Screw KS 2
Adjustment Screw K
Adjustment Screw K
Down Flange 7- 9
Plug Screw KS 6
∅ 6 mm Ball KS 5
Spring KS 4
0-Ring KS 3
Adjustment
9
K
Manual lowering H

20
BLAIN HYDRAULICS
· Pfaenstrasse 1 · D-74078 Heilbronn · Tel. [phone] · Fax [phone] · www.blain.de · [e-mail]
EV / KV Service Manual
EN ISO 9001 Overheating of Power Units
- System Leakage
Oil temperatures above 55 °C (130° F) should be avoided, otherwise the e󰀩ciency of the pump drops considerably and its life is
reduced. Aging of the oil is also accelerated.
Possible causes of overheating:
1. Up levelling too long due to the levelling speed being too slow or the slow down switch being set too low.
2. Machine room ventilation inadequate.
3. The frequency of operation is too high for the normal rate of heat dissipation.
Temporary solution:
As a temporary measure to avoid overheating of the oil resulting in the shut down of the elevator, the down speed can be slowed
to reduce frequency of operation until a permanent solution is installed.
Cooling systems
a. If the degree of overheating is not excessive and it takes for example two to three hours for the oil temperature to rise from 20°
to 55°C (70° to 130° F), it may be su󰀩cient to improve air circulation around the power unit, for example through the installation
of a 0.05 to 0.10 kW ventilator extracting air out of the machine room or through a fan of similar power, blowing air over the
power unit.
b. Should the above be inadequate, depending on the size of the elevator, it will be necessary to install a 10-50 l/min. (3 - 13 gpm)
pump to circulate the hot oil through an air cooled radiator of about 0.1 to 0.2 fan kW. It is also essential that there is su󰀩cient
extraction of warm air out of the machine room or that the cooler is out side of the machine room, for example in the elevator
shaft. The e󰀨ective cooling power of an air cooled radiator should not to be confused with the power of the fan drive which
normally need only be 0.1 or 0.2 kW. Normally, the e󰀨ective cooling power of a cooler need only be approximately ¼ of the
main hydraulic elevator motor, in the case of submersible drives.
Cooling systems for the above purpose should be switched into operation when the oil reaches 30° - 35°C (85° - 95° F).
System leakage (re-levelling)
The aim of manufacturers of hydraulic elevator control valves is to produce valves with zero leakage. Due to ne contamination in
the oil perfect sealing between valve parts may not always be achieved, leading to a slow down leak of the elevator car.
It would become unnecessarily expensive to strive for perfect sealing in every valve in operation. Therefore, because code require-
ments assure a safe relevelling system whether descent of the car is caused by valve leakage or through the cooling of the oil in
the cylinder pressure system, a minor leakage of the control valve can be tolerated.
1. The European Code EN 81-2 require: that the loaded elevator does not leak downwards by more than 10 mm (3/8“) in 10
minutes. This is the standard used to determine if a valve should be serviced for leakage.
2. For practical reasons, a quicker method for judging valve leakage is to close the ball valve in the cylinder line and observe
the gauge showing pressure in the cylinder chamber of the valve. If this pressure falls to zero in less than 20 secs, it may be
necessary to service the valve, depending on the diameter of the main ram and sensitivity of the customer.
3. Down sinking giving the impression of leakage can be due to cooling of the oil.
When the elevator is at rest and the temperature of the oil falls, contraction of the oil in the cylinder and piping causes the car to
sink. This sinking is very slow but overnight without relevelling could amount to as much as half a meter, depending on the tem-
perature drop of the oil and the volume of oil in the cylinder system. The elevator relevelling system, operating normally however,
keeps the car at oor level.
4. In the case of Blain EV valves, see page 10 EV and 16 KV indicating where valve down leakage can occur.