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Flow Control Valves
With and Without
Reverse Flow Check
Direct Acting
Inline Mounted - 350 bar
DV-, DRV- 20 to 40
z For regulating the speed of loads
z For ne adjustment and shut-off of the ow
z For system-related damping in hydraulic circuits
z To release pressure from accumulator systems
z As an emergency drain for lowering a load without a dead man's circuit
z High level of safety is achieved through patented spindle safety mechanism
z A set-screw locks the setting
z Choice of four sizes for optimum adaptability to the system
z Nickel-plated version available as an option
Operating pressure: max. 350 bar
Nominal ow: DV, DRV-20 max. 300 l/min
DV, DRV-25 max. 300 l/min
DV, DRV-30 max. 300 l/min
DV, DRV-40 max. 300 l/min
Opening pressure (on DRV): 0.5 bar
Media operating temperature range: min. -20 °C to max. +100 °C
Ambient temperature range: min. -20 °C to max. +100 °C
Fluid: Hydraulic oil to DIN 51524 Part 1 + 2
Viscosity: min. 2.8 mm²/s to max. 800 mm²/s
Filtration: Class 21/19/16 to ISO 4406
or cleaner
MTTF
d
: 150 years
Installation: No orientation restrictions,
preferably horizontal
Materials: Valve body: steel
Piston: hardened and
ground steel
Seals: FKM (standard)
Back-up rings: PTFE
Weight: DV 20 = 2.1 kg DRV 20 = 2.4 kg
DV 25 = 2.8 kg DRV 25 = 3.5 kg
DV 30 = 3.5 kg DRV 30 = 4.6 kg
DV 40 = 5.5 kg DRV 40 = 7.7 kg
The DV is an inline mounted ow control
valve which controls the ow by adjusting
the restriction of the cross-section. The
ow rate is therefore dependent on the
pressure differential and viscosity. Starting
with the throttle spindle in the fully closed
position when the ow is shut off, the
ow rate increases in accordance with
the appropriate curve as the control knob
is turned. The ow is controlled in both
directions.
The scale and coloured rings on the top of
the control knob enable accurate repeat
setting. The DRV is a ow control valve
in the same design which also allows the
same ne ow adjustment, but in one
direction only. Unrestricted ow in the
reverse direction is via the built-in check
valve.
Up to 300 l/min
Up to 350 bar
DV
DRV
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DV = Flow control valve
DRV = Flow control valve
with reverse ow check
20, 25, 30, 40
01 = standard, body phosphated
12 = body zinc-nickel coated
(seawater resistant), ne throttle spindle
in steel, protective dome nut
- adjustable with tool (not for size 40)
17 = body zinc-plated (not for size 40)
30 = body in stainless steel (only size 20)
Other types on request
(determined by manufacturer)
0 = inch thread,
tapped hole Form X to DIN 3852 Part 2
5 = NPT thread
12 = UNF thread
DV = ow direction A → B and B → A
DRV = ow direction A → B
Pressure differential ∆p against ow rate Q, measured at
constant ow setting n = 54 mm²/s and T
oil
= 36 °C
DV-20-01.1/0 705062
DV-25-01.1/0 705074
DV-30-01.1/0 705086
DV-40-01.1/0 705098
DRV-20-01.1/0 705562
DRV-25-01.1/0 705574
DRV-30-01.1/0 705586
DRV-40-01.1/0 705598
Other models on request
SEAL KIT 20FPM DV/P DRV/P RVP SRV 555094
SEAL KIT 25FPM DV/P DRV/P RVP 555095
SEAL KIT 30FPM DV/P DRV/P RVP 555096
SEAL KIT 40FPM DV/P DRV/P RVP 561456
Pressure differential [bar]
Flow rate [l/min]
ow setting in turns
Pressure differential [bar]
Flow rate [l/min]
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Type 01 30 11 12
Type 01 30 11 12
Subject to technical modications. Subject to technical modications.
G1 145 128 25 50 54
G1¼ 150 133 30 60 54
G1½ 155 138 35 70 54
G2 165 148 45 90 65
108 49 Pg29 8 24 129 2.10
108 49 Pg29 8 24 134 2.80
108 49 Pg29 8 24 139 3.50
130 49 Pg29 – – – 5.50
G1 145 128 25 50 77
G1¼ 150 133 30 60 93
G1½ 155 138 35 70 108
G2 165 148 45 90 130
127 49 Pg29 8 24 129 2.40
143 49 Pg29 8 24 134 3.50
143 49 Pg29 8 24 139 4.60
165 49 Pg29 – – – 7.70
Justus-von-Liebig-Str.
Tel: 0 68 97 / 509-01
Fax: 0 68 97 / 509-598
E-Mail: utec@hydac.com
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.
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