Pilot Check Valves
Description
Symbol
Cross Section
Cavity Details
76
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. Metric 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.
VH080
METRIC Cartridge - 350 bar
Direct acting check valve
Pilot piston to open
SPC4.M22 Valve Series
Technical Data
Performance Details
Flow (l/min)
Pressure (bar)
77
Specications may change without notice.
Ordering Code
Maximum operating pressure 350 bar
Maximum flow 60 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)
Pilor ratio 3,4:1
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.042
Weight 0,110 kg
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
