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Check Valve, Pilot-to-Open
Poppet Type, Direct Acting
Cartridge – 350 bar
RP10121
z Main application is to prevent uncontrolled movement or creeping of loaded cylinders
and also to isolate sections of the system
z All exposed surfaces zinc-plated and corrosion-proof
z All valve parts made of high-strength steel with hardened and ground components to
ensure minimal wear and extended service life
z Low pressure drop due to CFD optimized ow-path
z Valve is leak-free
Operating pressure: max. 350 bar
Nominal ow: 80 l/min
Pilot ratio: ϕ = 3.5
Leakage: Leak-free (<5 drops/min at 350 bar)
Cracking pressure 1.0 bar (standard)
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. 7.4 mm²/s to max. 420 mm²/s
Filtration: Class 21/19/16 to ISO 4406
or cleaner
MTTF
d
: 150 years
Installation: No orientation restrictions
Materials: Valve body: high tensile steel
Piston: hardened and ground steel
Seals: FKM (standard)
NBR (optional, temperature
range to -30 °C)
Support rings: PTFE
Cavity: 10121
Weight: 0.145 kg
The pilot-to-open check valve RP10121
is a direct-acting, spring-loaded poppet
valve. The valve allows ow from port 2
to port 1. In the opposite direction, the
poppet is pressed onto the seat and blocks
ow. If a sufciently high control pressure
builds at port 3, the poppet is lifted from
the valve seat and oil ows from 1 to 2.
The necessary pilot pressure at port 3 is
dependent on the pressures across port 1
and 2.
The following applies:
Pcontrol =
P
port1 - Pport2
+ Pport2
ϕ
Up to 80 l/min
Up to 350 bar
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259
Check valve, pilot-to-open
10121 = 3-way, metric
01 = standard, surface phosphated,
seals FKM
10 = surface phosphated, seals NBR,
with O-ring on control piston
12 = with reduced pilot and drain bores
20 = surface phosphated, seals NBR,
with O-ring on the control piston,
cracking pressure 2 bar
(determined by manufacturer)
Measured at ν = 72 mm²/s, T
oil
= 30 °C
10121
RP10121-01X 710006
RP10121-10X 717571
RP10121-12X 3011826
RP10121-20X 3075560
Other models on request
R10121-01X-01 395236
Steel,
zinc-plated
G1/2
G1/4
420 bar
R10121-01X-02 395237
Steel,
zinc-plated
M 22x1.5
M 14x1.5
420 bar
Other line bodies on request
SEAL KIT RP10121-XX0...FKM 560835
Countersink MK4 163910
Reamer MK2 163911
Plug gauge 169466
hex SW27 metric
torque 25
+5
Nm
tting depth
tting depth
Justus-von-Liebig-Str.
D-66280 Sulzbach/Saar
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.
Millimeter
Subject to technical modications.
Millimeter
Subject to technical modications.
