Relief Valves - Cartridge Style
Rev. 1 - 3/2025
RVDC.M20
METRIC Cartridge - 420 bar
Direct acting - Poppet type
Description
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 valve starts to open to tank (2) throttling flow to minimize the pressure rise. The innovative geometry of the deflector provides in fact a very low rise rate, and the poppet design guarantees great stability. The cartridge offers quick response to load changes in hydraulic circuits requiring low internal leakage as well as limited hysteresis.
Technical Features
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 to extend service life. Adjustment screw cannot be backed out of the valve. The valve has a balancing design allowing consistent relief operation and valve setting indipendent of backpressure at tank (port 2). Optional spring ranges to 420 bar (6000 psi). Metric cavity.
Technical data
Maximum operating pressure
420 bar
Maximum flow
30 l/min
Maximum internal leakage
1 cm3/min at 80 % of nominal set point
Pressure setting established
@ 5,00 l/min
Reseat pressure
85 % of cracking pressure
External component treatment
Zn/Fe - standard (96h)Zn/Ni (720h) - Upon customer request
O-ring temperature range
-30 ° C to 110 ° C (standard sealing NBR - BUNA - N)-35 ° C to 140 ° C - HNBR - Upon customer request-23 ° C to 225 ° C - FKM - Upon customer request
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 filtration admitted)
Orientation
No restrictions
Installation torque
40 - 50 Nm Hex 22
Installation torque
20 - 25 Nm Hex 19
Tightening torque blind nut
18 - 22 Nm - Hex 17
Oil testing condition
ISO VG 46 cSt
Seal Kit
SK.106
Weight
0,210 Kg
Cross Section
Cavity Details
Performance details
Spring Options:
Click here to change the graphNote:
The performance chart illustrates flow handling capacity for significant spring bias options. p/Q curves are recorded at TOil = 40°C and 46 cSt. Spring Options:
Click here to change the graphOrdering code
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