E 5.190.1.0/01.13
162
Up to 30 l/min
Up to 350 bar
Accumulator Charging Valve
Spool Type
Pilot-Operated – 350 bar
DLHSD (Manifold Mounting)
DLHSR (Inline Mounting)
FEATURES
z Re-charging of the accumulator is dependent on the switch-on pressure, resulting
in full accumulator capacity for emergency function in pump intermittent duty
mode.
z Switch-off pressures within the pressure ranges 100, 250 and 350 bar freely
adjustable
z Very low discharge of the accumulator due to pilot stage with minimal leakage
z Compact design enables space-saving installation in control blocks and power
units
z Optimal system adaptation due to valves with different, xed switching pressure
differentials (12, 16, 21%),
z Built-in check valve means no additional installation cost
z Low ∆p characteristics
z Various pressure ranges up to 350 bar
z Simple commissioning by setting the switch-off pressure
SPECIFICATIONS
Operating pressure: min. 0 to max. 350 bar
max. 10 bar across tank port T
Nominal ow: max. 30 l/min
Media operating temperature range: min. -20 °C to max. +100 °C
Ambient temperature range: min. -20 °C to max. +100 °C
Operating uid: Hydraulic oil to DIN 51524 Part 1 and 2
Viscosity range: min. 8 mm²/s to max. 320 mm²/s
Filtration: Class 21/19/16 according to ISO 4406 or
cleaner
Installation: No orientation restrictions
Materials: Valve body: high tensile steel
Piston: hardened and
ground steel
Seals: FKM (standard)
Back-up rings: PTFE
Weight: DLHSD: 2.1 kg
DLHSR: 1.5 kg
Line length: From port A to the accumulator:
max. 200 mm; T (tank) or L (drain) lines
to the tank must be sized for minimal
back-pressure
Switching pressure differential: 12%, 16%, 21%
(switching pressures are affected by the
pressure across port T)
The accumulator charging valve DLHS
D / R is a pilot-operated, spring-loaded
spool valve mounted in a manifold or
inline housing. Its function is to control
the charging of the accumulator within a
pre-set switching range. A pilot stage with
dened hysteresis, a main piston and a
check valve are integrated into the circuit.
The accumulator is charged at port A from
pump port P across the check valve. If the
pressure in the accumulator exceeds the
pre-set value of the pilot stage, the main
piston opens and the pump is relieved to
tank. If the pressure in the accumulator
decreases by the value of the switching
pressure differential, the pilot stage closes
again and the accumulator is re-charged.
Caution:
– Switching pressures are affected by the
pressure at port T!
– Select the largest possible switching
pressure differential!
– Ensure that switch-off pressure +
accumulator size to pump ow achieves
a charging time of >1s!
FUNCTION
DLHSD DLHSR
E 5.190.1.0/01.13
163
MODEL CODE
DLHSR – 01 X – 21 / 250
Accumulator charging valve - hydraulic
Controlled by switching pressure differential
DLHSD = manifold housing
DLHSR = inline housing
Type
01 = standard (with check valve)
Series
(determined by manufacturer)
Switching pressure differential
12 = minus 12% of switch-off press. = switch-on pressure
16 = minus 16% of switch-off press. = switch-on pressure
21 = minus 21% of switch-off press. = switch-on pressure
Max. switch-off pressure
100 = 30 to 100 bar
250 = 60 to 250 bar
350 = 100 to 350 bar
PERFORMANCE
Standard models
Model code Part No.
DLHSD-01X-12/100 561894
DLHSD-01X-12/250 558260
DLHSD-01X-16/100 3345531
DLHSD-01X-16/250 3034027
DLHSD-01X-21/100 3107800
DLHSD-01X-21/250 562729
DLHSD-01X-21/350 3228872
DLHSR-01X-12/100 3192646
DLHSR-01X-12/250 3526092
DLHSR-01X-12/350 3227535
DLHSR-01X-16/100 3069194
DLHSR-01X-16/250 396811
DLHSR-01X-16/350 3195654
DLHSR-01X-21/100 561385
DLHSR-01X-21/250 3126516
Q [l/min]
Q [l/min]
Q [l/min]
Q [l/min]
∆p [bar]∆p [bar]∆p [bar]∆p [bar]
Measured at:
n = 46 mm²/s, T
oil
= 40 °C
DLHSD-01X-12/100 P→B
P→T
P→A
P→T
DLHSD-01X-12/100
DLHSR-01X-12/350
DLHSR-01X-12/350
E 5.190.1.0/01.13
164
HYDAC Fluidtechnik GmbH
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
Tel: 0 68 97 / 509-01
Fax: 0 68 97 / 509-598
Email: utec@hydac.com
NOTE
The information in this brochure relates to
the operating conditions and applications
described.
For applications or operating conditions
not described, please contact the relevant
technical department.
Subject to technical modications.
CIRCUIT DIAGRAM EXAMPLECIRCUIT DIAGRAM EXAMPLE
DIMENSIONSDIMENSIONS
max.
SW 8
thru
SW 2.5
Millimeter (Inch)
Subject to technical modications
Millimeter (Inch)
Subject to technical modications
Consumer
DLHSRDLHSD
DLHSRDLHSD
Interface A6 DIN 24340
and CETOP R 35 H-4.2-4-03
Consumer
E 5.190.1.0/01.13
165
