PO Relief Valves - Cartridge Style
RVQL.M33
METRIC Cartridge - 400 bar
Pilot Operated - Spool type
Description
A screw-in, cartridge style, pilot operated (2-stage), spool type, normally closed, hydraulic relief valve. When the pressure at the Inlet (1) reaches the valve setting, the pilot poppet starts to open from its seat and determines the shifting of the main stage poppet (spool type) that throttles oil flow to tank (2).
There are options for two pressure setting.
One is Main stage pressure setting, that is called nominal setting. Second is Pilot stage pressure setting. It can be activated with esternal hydraulic pilot pressure on port 3.
The cartridge offers smooth transition in response to load changes in demanding hydraulic circuits. Fast, smooth response and limited hysteresis. Warning: Adjustment screw doesn’t have a positive stop which prevents it from being backed out of the valve. Metric cavity.
Technical Features
All external surfaces are not zinc plated. All valve parts are made of high strength steel. Poppet, Spool and Valve seats are hardened and micron finished in order to guarantee minimal wear and to extend service life. Spring range up to 400 bar (5800 psi). Back pressure on the tank port (port 2) is directly additive to the valve setting at a 1:1 ratio.
Technical data
Maximum operating pressure
400 bar
Maximum flow
300 l/min
Pressure setting range
100 - 400
Maximum internal leakage
100 cm3/min @ 69 bar
REQUIRED PRESSURE ON PORT 3
≤ 30 bar
PILOT STAGE PRESSURE SETTING
see table below
Pressure setting established
@ 20,00 l/min
Reseat pressure
90 % of cracking pressure
Plastic tamper proof cap
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External component treatment
Zn/Fe - standard (96h) and 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
Wire seals tamper proof
Suitable design upon request
Viscosities
7,4 to 420 cSt
Filtration
20 / 18 / 15 ISO 4406 (maximum filtration admitted)
Orientation
No restrictions
Installation torque
120 - 140 Nm Hex 32
Installation torque
54 - 66 Nm Hex 22
Oil testing condition
ISO VG 46 cSt
Seal Kit
SK.223
Weight
0,747 Kg
Cross Section
Cavity Details
Performance details
Note:
The performance chart illustrates flow handling capacity at various settings. p/Q curves are recorded at TOil = 40°C and 46 cSt. p/Q curves are recorded up to 200 l/min. These are theoretical from 200 l/min onward. Spring Options:
Click here to change the graphOrdering code
