Relief Valves

Description

Symbol

Cross Section

Cavity Details

168

VH004

Technical Features

All external surfaces are zinc plated and corrosion-proof.

All valve parts are made of high strength steel. Both internal

poppet and the valve seat are hardened and ne nished to

guarantee minimal wear and to extend service life. Pressure

setting is pre-adjusted by the factory and cannot be changed.

Optional spring ranges to 350 bar (5000 psi). 1-piece design.

Metric cavity.

The IRV valve provides in one compact insert

cartridge the typical function of shock relief

valve, side-in nose-exhaust. When the pres-

sure at the high pressure inlet (1) reaches the

valve setting, the valve starts to open to tank

(2). The pressure rise is very low thanks to the

smart deflector design. Flow passage in the

opposite direction (2 to 1) is blocked. High pre-

cision machining guarantees quick response

to load changes, limited hysteresis and redu-

ced internal leakage.

METRIC Cartridge - 350 bar

Direct acting - Poppet type

IRV0.M16 Valve Series

Technical Data

169

Specications may change without notice.

Ordering Code

Maximum operating pressure 350 bar

Maximum flow 40 l/min

Setting Pressure See table below

Maximum internal leakage 1 cm

/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 @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 25-30 Nm

Technical specications for characterization See page 480

Oil testing condition ISO VG 46 cSt

Seal kit code SK.011

Weight 0,040 kg

Relief Valves

Springs’ Graphs

p/Q performance

170

Flow (l/min)

Pressure (bar)

Spring = B (51 - 100bar)

Spring = N (10 - 50bar)

IRV0.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

171

Specications may change without notice.

p/Q performance

Flow (l/min)

Pressure (bar)

Spring = V (151 - 250bar)

Spring = W (251 - 350bar)

Spring = G (101- 150bar)

p/Q performance

Flow (l/min)

Pressure (bar)