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Pressure Compensated
Flow Control Valve, Direct Acting
Inline or Manifold Mounted – 210 bar
SRVR / SRVRP 08 to 20
z For regulating the speed of loads independently of the pressure
z For limiting the max. speed of lifting gear
(in compliance with accident prevention regulations)
z For limiting the ow rate for control oil circuits in the main circuit and ofine
z All valve parts made of high-strength steel with hardened and ground components to
ensure minimal wear and extended service life
z Choice of ve sizes for optimum adaptability to the system
z Space-saving installation
z Optional zinc-plated version available
Operating pressure: max. 210 bar
Nominal ow: SRVR / SRVRP08 up to max. 12 l/min
SRVR / SRVRP10 up to max. 22 l/min
SRVR / SRVRP12 up to max. 55 l/min
SRVR / SRVRP16 up to max. 90 l/min
SRVR 20 up to max. 160 l/min
Media operating temperature range: min. -20 °C to max. +80 °C
Ambient temperature range: min. -20 °C to max. +80 °C
Fluid: Hydraulic oil to DIN 51524 Part 1 + 2
Viscosity range: 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
Weight: SRVR-08 = 0.6 kg
SRVR-10 = 0.9 kg
SRVR-12 = 1.7 kg
SRVR-16 = 2.2 kg
SRVR-20 = 4.0 kg
SRVRP-08 = 0.9 kg
SRVRP-10 = 1.4 kg
SRVRP-12 = 2.3 kg
SRVRP-16 = 3.3 kg
The SRVR / SRVRP is a pressure-
compensated ow control valve which
maintains a constant outlet ow by
means of a control function. The ow rate
is largely independent of the pressure
and viscosity. The valve has a variable
orice with pressure compensator spool.
The variable orice determines the ow
cross section. If oil is owing from A to
B, a pressure drop occurs at the variable
orice. The pressure compensator moves
into the control position which corresponds
to the force equilibrium. This is created
by the pressure drop acting on the control
piston area overcoming the spring force.
As the ow rate increases (increasing
pressure drop), the diameter of the
control orice is reduced until the forces
are equal again. A constant ow rate from
A to B is therefore achieved. In the reverse
direction there is free ow via a built-in
check valve.
Important: if the required control pressure
differential is not reached, the valve
operates as a non-compensated ow
control valve.
Up to 160 l/min
Up to 210 bar
Control orice
Control
piston
Check
valve
Spring
Control
knob
Set-
screw
Spindle
Housing
Variable
orice
E .2/12.10
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SRVR = ow control valve for inline mounting
with bypass check valve
SRVRP = ow control valve for manifold mounting
with bypass check valve
08, 10, 12, 16,
20 (SRVR only)
01 = standard (housing phosphated)
12 = housing nickel-plated, seals FKM
with protective dome nut – adjustment with tool
Other types on request
(determined by manufacturer)
0 = BSP thread,
threaded connection Form X to DIN 3852 Part 2
5 = NPTF thread
Flow direction A to B
Q–∆p curve measured at n = 34 mm²/s and t
oil
= 46 °C
SRVR-08-01.1/0 706067
SRVR-10-01.1/0 706075
SRVR-12-01.1/0 706083
SRVR-16-01.3/0 706091
SRVR-20-01.1/0 706115
SRVRP-08-01.2 706151
SRVRP-10-01.1 706153
SRVRP-12-01.1 706155
SRVRP-16-01.3 706157
Other models on request
SEAL KIT 08FPM DV/P DRV/P DVE RVP SRVR/P 555090
SEAL KIT 10FPM DV/P DRV/P DVE RVP SRVR/P 555091
SEAL KIT 12FPM DV/P DRV/P DVE RVP SRVR/P 555092
SEAL KIT 16FPM DV/P DRV/P DVE RVP SRVR/P 555093
SEAL KIT 20FPM DV/P DRV/P RVP SRVR 555094
approx. 4.5 turns
approx. 4 turns
approx. 3 turns
approx. 2 turns
approx. 1 turn
approx. 8 turns
approx. 7 turns
approx. 6 turns
approx. 3 turns
approx. 4 turns
approx. 5 turns
approx. 2 turns
approx. 6.5 turns
approx. 6 turns
approx. 5 turns
approx. 4 turns
approx. 3 turns
approx. 2 turns
approx. 1 turn
approx. 8 turns
approx. 9 turns
approx. 7 turns
approx. 6 turns
approx. 3 turns
approx. 4 turns
approx. 5 turns
approx. 2 turns
approx. 1 turn
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Flow direction from B to A
Pressure differential ∆p dependent on ow rate Q
via variable orice and check valve (SRVR / SRVRP)
with fully open spindle
measured at n = 34 mm²/s and t
oil = 46 °C
Nominal Size Flow rate
(l/min)
Required control
pressure differential
∆p = p
1
- p
2
(bar)
08 12 7
10 22 7
12 55 7
16 90 7
20 160 12
closed
control knob with
hex. is standard
on size 20
open
Threaded
connection
A B C D E F G
G 1/4 76 68 15 30 17.5 92 29
G 3/8 91 81.5 17.5 35 18 105 38
G 1/2 106.5 96.5 22.5 45 21 125 38
G 3/4 109 100 25 50 26 140 38
G 1 150 134 30 60 33 175 49
W SW SW1 SW2 X Weight [kg]
PG11 24 – – – 0.60
PG16 27 5 17 85.5 0.90
PG16 32 6 19 104.5 1.70
PG16 41 6 19 107 2.20
PG29 50 – – – 4.00
approx. 4 turns
approx. 5 turns
approx. 6 turns
approx. 7 turns
approx. 8 turns
approx. 9 turns
approx. 3 turns
approx. 2 turns
approx. 1 turn
SW19 metric
SW2 metric
SW1 metric
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The information in this brochure relates to the operating
conditions and applications described. For applications and
operating conditions not described, please contact the relevant
technical department.
All technical details are subject to change without notice.
closed
open
A B D E F G H J K L
08 91 83 11 6.6 30 29 – 73 86 89
10 108.5 99 11 6.6 35 38 – 89 105 107.5
12 129 119 11 6.6 45 38 – 105 118 121.5
16 134 125 15 9 50 38 62 124 145 145.5
M N O P R S T U V W SW1 SW2 X Weight
[kg]
33.5 45 9.5 54 7.5 12.7 6.5 23 22.5 PG11 – – – 0.85
38 51 10.2 68 10 15.6 6.4 28 30 PG16 5 17 103 1.40
44.5 60 12.5 79 13 18.6 6.5 38 29.5 PG16 6 19 127 2.30
54 70 16 92 17 24.5 10.5 41 39 PG16 – – – 3.30
Required surface nish on
interface area
Justus-von-Liebig-Str.
Tel: 0 68 97 /509-01
Fax: 0 68 97 /509-598
E-Mail: utec@hydac.com
SW2 metric
SW1 metric
