LEFFER
STAHLBAU - APPARATE- UND MASCHINENBAU - LEICHTBAU - MONTAGEN
Stahl- und Apparatebau Hans Leffer GmbH & Co. KG
⋅
Postfach 20 03 60
⋅
66044 Saarbrücken
Ust-IdNr.:DE 814736552
40-010137
Hausanschrift:
Telefon
+49
-
6897-793-0
Bankverbindungen:
Pfählerstraße 1, Dudweiler, 66125 Saarbrücken / Deutschland
Telefax
+49-6897-793 330
Landesbank Saar Girozentrale, Saarbrücken
+49-6897-793 217
Nr. 5182-001
(BLZ 590 500 00)
Briefanschrift:
Bayerische Hypo- und Vereinsbank AG, Mannheim
Postfach 20 03 60, 66044 Saarbrücken / Deutschland
Nr. 7 002 580
(BLZ 670 201 90)
Express-Station:
Handelsregister Saarbrücken HRB 4398
Geschäftsführer: Hans G. Leffer, Georg Leffer
Hauptbahnhof, 66111 Saarbrücken / Deutschland
39
L
H
8.5.5
When using a power pack, make sure, the hydraulic temperature
(inside the hydraulic tank) does not exceed 70 °C – 158 °F.
8.6 PRESSURE SETTINGS (For Different Casing Diameter)
(Clamping, Oscillating, Lifting - and Retaining)
Casing diameter
Max. pressure setting
1500 mm ~ 4´ 11”
270 bar - 3915 psi
1200 mm ~ 3´ 11
1
/
4
”
250 bar - 3625 psi
1000 mm ~ 3´ 3
3
/
8
”
200 bar - 2900 psi
800 mm ~ 2´ 7
1
/
2
”
170 bar - 2465 psi
9.0 DESCRIPTION AND FUNCTION OF HYDRAULIC COMPONENTS
acc. to dwg.-no. 1.45709
The entire machine is controlled by open hydraulic circuits.
The main control valves (item 1, 2 & 3) are controlled hydraulically over electrical.
This means, that the solenoid valves (item 19, 20) are activated by 24 vdc via remote
control. These solenoid valves again control the pilot pressure
(~35 bar – 500 psi, inlet P3).
This pilot pressure again is used to switch the main control valves (item 1, 2 & 3) as
well as the rapid motion valve (item 27).
To control the oscillating motion, the valve (item 22/23), located at the left hand
oscillating cylinder, provides pilot pressure to the oscillating valve (item 3) when
activated by the remote control and solenoid valve item 20.
The pilot pressure has to be ~ 35 bar - 500 psi and is controlled by the overload valve
(item 7). The pilot pressure can be read out at gage item 8.
The gages, item 9, are indicating the main pressure needed to run the functions
lifting, clamping, retaining (upper casing guide), adjusting and oscillating.
To ensure, that the clamping cylinder and the retaining cylinders are kept in their
“closed” position, one double check valve (item 12) in each circuit, has been installed
in conjunction with a pressure accumulator (item 11), which compensates minor oil
losses.
