Accumulator Charging Valve
NG 6 ISO 4401
Technical Data Sheet
2
Symbol
Symbol, detailed
Technical Data
General
Type of valve piloted piston valve
Mounting
4x M5x60 DIN912
Connection of ports mounting plate
Ambient temperature -5 to +50 °C
Mounting positions mountable in any positions
Mass valve
2.0 kg
Hydraulic
Pressure stages 20-60; 45-80; 80-120;
120-175; 175-250; 250-315 bar
Switching hysteresis 5; 10; 15 or 20 %
Hydraulic oil temperature -10 to +70 °C
Viscosity range 10 to 300 mm
2
/s
Flow rate max. 30 l/min
Charactersitic curve
hydraulic oil 35 mm
2
/ s, 50°C
Design and Function
Accumulator charging valves are piloted piston valves. The
valve controls the hydraulic accumulator charging process, for
systems with fixed displacement pumps. After the accumula-
tor has been charged and system pressure is reached, the
valve then switches the pump flow into bypass mode (P to T).
When the pressure falls because functions are demanding
flow, the valve will sense the difference and will close the by-
pass to allow the accumulator to recharge. Presure differen-
ces available include: 5%, 10%, 15% and 20%.
Advantages
•
optimised power consumption and reduced
heat emission from the hydraulic system
• energy saving due to low bypass pressure
• fixed switching hysteresis, simple start up procedure
• soft and exact switching over due to pressure pre-relieve
• robust und reliable through simple design
Options
• electrical discharge
• complete accumulator charging units
• accumulator charging valve kit for manifold mounting
consumer
3
dimensions in mm
Dimensional Drawing
view: fastening side of mounting plate
P A T B F1 F2 F3 F4 G
Ø max [mm] 7.5 7.5 7.5 7.5 - - - - 4
x [mm] 21.5 12.7 21.5 30.2 0 40.5 40.5 0 33
y [mm] 25.9 15.5 5.1 15.5 0 -0,75 31.75 31 31.75
F: M5, thread depth min. 1,5 x Ø
G: bore depth min. 1,5 x Ø
Various single or multiple manifolds are avalaible.
Port Connection Pattern
20341-SLV6DY55-DSH-EN-1507 | VTHL | Dimensions and illustrations without obligation. Subject to modifications.
Type Code
Dy 55 . 1 - 6 - 120 P - 391 K y
Voith Turbo H + L Hydraulic GmbH & Co. KG
Schuckertstraße 15
71277 Rutesheim, Germany
Tel. +49 7152 992 3
Fax +49 7152 992 4 00
sales-rut@voith.com
www.voith.de/hydraulik-systeme
Original-Sprache: deutsch.
Rechtlich bindende Sprachversion: deutsch.
external control oil return
adjustment method
S= setting screw
K= cover
design code
design
pressure stages, max. set pressure
60,80,120,175,250,315 bar
nominal size
switching hysteresis
(0 = 5%, 1 = 10%, 2 = 15%, 3 = 20%)
symbol
pressure valve, piloted
material number
