Pilot Check Valves
Description
Symbol
Cross Section
Cavity Details
70
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 prevent leakage. Single-piece, high durometer,
extrusion resistant seals. Optional bias springs for
back-pressure application flexibility. Industry SAE
common cavity.
Cartridge style, normally closed, single pilot
check valve. Cartridge is closed until sufcient
pressure 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.
SAE Cartridge - 350 bar
Direct acting check valve
Pilot piston to open
SPC6.S08 Valve Series
SAE08-2
Flow (l/min)
Pressure (bar)
71
Specications may change without notice.
Technical Data
Performance Details
Ordering Code
Note: The performance
chart illustrates flow han-
dling capacity for signicant
spring bias options. p/Q
curves are recorded at TOil =
40°C and 46 cSt
Maximum operating pressure 350 bar
Maximum flow 40 l/min
Maximum Internal Leakage
0,10 cm
3
/ min @ 10 bar
0,10 cm
3
/ min @ 350 bar
External component treatment
Zn/Fe - standard (96h)
Zn/Ni (720h)
Pilot ratio 3,2:1
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 40-45 Nm
Technical Specications for characterization see page 480
Oil testing condition ISO VG 46 cSt
Seal kit code SK.047
Weight 0,063 kg
