Relief Valves
Symbol
Cross Section
Cavity Details
90
METRIC Cartridge - 350 bar
Direct acting with anti-cavitation
Poppet Type
Technical Features
Description
The RVA valve combines in one compact cartridge the
typical function of shock relief valve and anti-cavitation
through the built-in check valve. In the relief function
when the pressure at the Inlet (1) reaches the valve
setting, the valve starts to open to tank (2) and thanks
to the effect of the deflector integrated into the poppet
it provides a limited pressure rise. The cartridge offers
excellent response to load changes in hydraulic circuits
requiring low internal leakage as well as limited hysere-
sis. Innovative design on internal dampening part gua-
rantees great stability. In the free reverse flow function
a light bias spring allows for ease of flow passage from
side to nose (2 to 1) by lowering the internal seat.
VH160
All external surfaces are zinc plated and corrosion-proof.
All valve parts are made of high strength steel.
Poppet is hardened and ground to guarantee minimal
wear and extended service life; internal seat is also ground
and made of hard steel providing same advantages.
Positive stop prevents springs from going solid.
Optional spring ranges to 350 bar (5000 psi).
Metric cavity.
RVA0.M18 Valve Series
21
Technical Data
91
Specications may change without notice.
Ordering Code
Maximum operating pressure 350 bar
Maximum flow 60 l/min
Setting Pressure See table below
Anti-cav cracking pressure <0,5 bar
Maximum internal leakage 5 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 @5 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 50-55 Nm (Hex. 22)
Tightening torque nut 5-10 Nm (Hex. 10)
Technical specications for characterization See page 480
Oil testing condition ISO VG 46 cSt
Seal kit code SK.101
Plastic tamper proof cap CTP.001 (for more details see page 428-429)
Wire seals tamper proof Suitable design upon request
Weight 0,117 kg
Relief Valves
92
RVA0.M18 Valve Series
Spring = N (51 - 90bar)
Spring = B (91 - 130bar)
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
Flow (l/min)
Flow (l/min)
Flow (l/min)
Pressure (bar)
Pressure (bar)
Pressure (bar)
p/Q performance
p/Q performance
p/Q performance
1
Spring = Y (20 - 50bar)
2
3
Springs’ Graphs
93
Specications may change without notice.
Spring = V (206 - 275bar)
Spring = W (276 - 350bar)
Anti-cavitation function
Flow (l/min)
Flow (l/min)
Flow (l/min)
Flow (l/min)
Pressure (bar)
Pressure (bar)
Pressure (bar)
Pressure (bar)
p/Q performance
p/Q performance
p/Q performance
p/Q performance
4
Spring = G (131 - 205bar)
5
6
7
