Pilot Check Valves
Description
Symbol
Cross Section
Cavity Details
62
Technical Features
All external surfaces are zinc plated and cor-
rosion-proof. All valve parts are made of high
strength steel. Poppet is hardened and ground to
guarantee minimal wear and to extend service life.
Pilot piston is hardened and ground, sealed to pre-
vent leakage. Optional bias springs for back-pres-
sure application flexibility. Industry commonly
used hybrid cavity.
Normally closed, dual pilot check valve.
Cartridge is closed until sufcient pres-
sure is applied on port 1 to reach the bias
spring setting, lift the poppet and allow free
flow to 2. The valve is normally closed from
2 to 1. When sufcent pressure is applied
on port 3, the pilot piston lifts the poppet
from its seat and allows flow from 2 to 1.
Very limited leakage in the check condition.
Hybrid SAE10 Cartridge - 420 bar
Direct acting check valve-
Pilot piston to open
SPC0.S10 Valve Series
VH146
Technical Data
Flow (l/min)
63
Specications may change without notice.
Pressure (bar)
Performance Details
Ordering Code
Maximum operating pressure 420 bar
Maximum flow 80 l/min
Maximum Internal Leakage
0,10 cm
3
/ min @ 10 bar
0,10 cm
3
/ min @ 420 bar
External component treatment
Zn/Fe - standard (96h)
Zn/Ni (720h)
Pilot ratio 3,9:1
O-ring Temperature Range -30° C to 110° C (standard sealing NBR - BUNA-N)
Oil Temperature Range -30° C to 110° C
Fluids Mineral - based or synthetics with lubricating properties
Viscosities 7,4 to 420 cSt
Filtration 20/18/15 ISO 4406 (maximum ltration admitted)
Orientation No restrictions
Installation torque 55-65 Nm
Technical Specications for characterization see page 480
Oil testing condition ISO VG 46 cSt
Seal kit code SK.081
Weight 0,100 kg
Note: The performance
chart
illustrates flow handling ca-
pacity for signicant spring
options. p/Q curves are
recorded at TOil = 40°C
and 46 cSt
