Relief Valves
Symbol
Cross Section
Cavity Details
94
VH001
Technical Features
Description
All external surfaces are zinc plated and corro-
sion-proof. All valve parts are made of high stren-
gth steel. Poppet is hardened and ground to gua-
rantee minimal wear and to extend service life. In
case adjustment screw is backed out of the valve,
no external leakage is expected (sealed spring
seat). Optional spring ranges to 450 bar (6700 psi).
Metric cavity.
A screw-in, cartridge style, direct acting, poppet
type, normally closed hydraulic relief valve. It’s
typically used to protect hydraulic components
from pressure transients. When the pressure at
the Inlet (1) reaches the valve setting, the val-
ve starts to open to tank (2) providing a limited
pressure rise. The reduced dimensions and the
excellent response time make this valve ideally
suited for pilot circuits. Hysteresis is also extre-
mely low.
METRIC Cartridge - 450 bar
Direct acting - Poppet type
RVB0.M16 Valve Series
Technical Data
95
Ordering Code
Specications may change without notice.
Ordering Code
Maximum operating pressure 450 bar
Maximum flow 1,5 l/min
Setting Pressure See table below
Maximum internal leakage 0,25 cm
3
/min to 80% of nominal set point
External component treatment
Zn/Fe - standard (96h)
Zn/Ni (720h)
O-ring Temperature Range -30° C to 110° C (standard sealing NBR - BUNA-N)
Oil Temperature Range -30° C to 110° C
Pressure settings established @1 l/min
Reseat pressure nominal 90% of cracking pressure
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 35 - 40 Nm (Hex. 17)
Tightening torque nut 6,5- 8,5 Nm (Hex. 10)
Technical specications for characterization See page 480
Oil testing condition ISO VG 46 cSt
Seal kit code SK.004
Plastic tamper proof cap CTP.002 (for more details see page 428-429)
Weight 0,050 kg
Relief Valves
1
2
p/Q performance
p/Q performance
96
Flow (l/min)
Flow (l/min)
Pressure (bar)
Pressure (bar)
Springs’ Graphs
Spring = N (31 - 100bar)
Spring = Y (1 - 30 bar)
RVB0.M16 Valve Series
Note: The performance chart illustrates flow handling capacity for each
spring bias options. p/Q curves are recorded at TOil = 40°C and 46 cSt
p/Q performance
p/Q performance
3
4
97
Flow (l/min)
Flow (l/min)
Pressure (bar)
Pressure (bar)
Specications may change without notice.
Spring = G (251 - 450bar)
Spring = B (101 - 250bar)