Relief Valves
Symbol
Cross Section
Cavity Details
214
VH208
Description
Technical Features
All external surfaces are zinc plated and corro-
sion-proof. All valve parts are made of high stren-
gth steel. Poppets are hardened and micron ni-
shed in order to guarantee minimal wear and to
extend service life. Adjustment screw cannot be
backed out of the valve. Spring range up to 420
bar (6100 psi). Metric cavity.
The RVP valve combines in one compact cartridge
the typical function of relief valve and anticavitation
through the check valve. It’s a screw-in, pilot ope-
rated (2-stage), poppet type, normally closed valve.
When the pressure at the Inlet (1) reaches the val-
ve setting, the pilot poppet starts to open from its
seat and determines the shifting of the main stage
poppet that throttles oil flow to tank (2). In the free
reverse flow function a light bias spring allows for
ease of flow passage from side to nose (2 to 1).
The cartridge offers smooth transition in response
to load changes in demanding hydraulic circuits.
Smooth response, reduced pressure rise and limi-
ted hysteresis.
METRIC Cartridge - 420 bar
Pilot Operated with anti-cavitation
Poppet type
RVP0.M36 Valve Series
215
Specications may change without notice.
Technical Data
Ordering Code
Maximum operating pressure 420 bar
Maximum flow 400 l/min
Setting Pressure 50 - 420 bar
Anti-cav cracking pressure <2 bar
Maximum internal leakage 1 cm
3
/min @100 bar
External component treatment
Zn/Fe - standard (96h)
Zn/Ni (720h)
O-ring Temperature -30° C to 110° C (standard sealing NBR - BUNA-N)
Oil Temperature Range -30° C to 110° C
Pressure settings established @10 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 60-80 Nm (Hex.36)
Thigtening torque nut 15-20 (Hex.17)
Technical specications for characterization See page 480
Oil testing condition ISO VG 46 cSt
Seal kit code SK.055
Wire seals tamper proof Suitable design upon request
Weight 0,195 kg
Performance Details
Flow (l/min)
Pressure (bar)
Pressure relief function
(1 to 2)
Flow (l/min)
Pressure (bar)
Note: The performance chart illustrates flow handling capacity at
various settings. p/Q curves are recorded at TOil = 40°C and 46 cSt
Anti-cavitation function
(2 to 1)