Danfoss Cartridge Valves Technical Information

Cartridge Valves Technical Information Introduction

Contents

IN ••••••••••••••••••••••••••••••••••••• Introduction

CV ••••••••••••••••••••••••••••••••••• Check Valves

SH •••••••••••••••••••••••••••••••••••Shuttle Valves

RV •••••••••••••••••••••••••••••••••••• Relief Valves

PR ••••••••••••••••••••••••• Pressure Reducing Valves

SQ ••••••••••••••••••• Sequence and Unloading Valves

FC •••••••••••••••••••••••••••••• Flow Control Valves

PO ••••••••••••••••••••••• Pilot Operated Check Valves

CB ••••••••••••••••••••••••••• Counterbalance Valves

DV •••••••••••••••••••••••••Directional Control Valves

LE •••••••••••••••••••••••••••••••••••Logic Elements

SV ••••••••••••••••••••••••••••••••• Solenoid Valves

PV •••••••••••••••••••••••••••••• Proportional Valves

FD •••••••••••••••••••••••••••••••••• Fan Drive HICs

MM ••••••••••••••••••••••••••••••Motor Mount HICs

TR •••••••••••••••••••••••••••••Traction Control HICs

SP ••••••••••••••••••••••••••••••Spreader Valve HICs

MX ••••••••••••••••••••••••• Mix-N-Match Dual Bodies

D3 ••••••••••••••••••••••••••• DCV03 Solenoid Valves

D5 ••••••••••••••••••••••••••• DCV05 Solenoid Valves

AC ••••••••••••••••••••••••••••••••••••• Accessories

CA ••••••••••••••••••••••••••••••••••••••••Cavities

HS •••••••••••••••••••••••••••••••••••••• Housings

CL •••••••••••••••••••••••••••••••••••••••••• Coils

CR ••••••••••••••••••••••••••••••••• Cross Reference

ID •••••••••••••••••••••••••••••••••••••••••••Index

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Cartridge Valves Technical Information Introduction

Cartridge Valves

CARTRIDGE VALVE
INTRODUCTION

Cartridge valves are compact and economical components that can be used for
directional, pressure, or ow control in systems from 0.4 L/min [0.1 US gal/min] up to
400 l/min [100 gpm], and for pressures up to 350 bar [5000 psi]. By combining standard
cartridge valves almost any hydraulic circuit can be easily created. Using cartridge
valves in a custom manifold, a designer can create a hydraulic integrated circuit (HIC)
that provides a compact package for hydraulic control with reduced plumbing, easier
installation, easier service, and fewer leak points than traditional hydraulic systems.

Each valve has several key ratings, specications, and settings:

· Each Danfoss ICS cartridge valve ts a Danfoss ICS standard cavity. These cavities
are designed around SAE or metric standard o-ring straight thread ports. In many
cases these cavities are interchangeable with cavities used by other manufacturers.
See catalog sheets for details.

· The pressure rating is based on NFPA T.2.6.1 fatigue test standards and a burst test
with a minimum safety factor of 3:1

· The ow rating is based on the ow at a pressure drop of 7 bar [100 psi] for
directional valves or a pressure rise or drop of 7 bar [100 psi] for pressure relief and
reducing valves, with 32 mm2/s (cSt) [151 SUS] uid. Note that for many valves this
ow can be exceeded if the resulting higher pressure drop and the associated heat
generation are acceptable. The exceptions to this are solenoid-operated spool­type directional valves and proportional ow control valves where the ow ratings
indicate a performance limit.

· The solenoid voltage is a nominal value. All solenoid valves are designed to
operate at 85% of nominal voltage with full rated ow and pressure and at an
ambient temperature of 40 °C [104 °F].

· Pressure settings for check, relief, reducing, sequence, and motion control valves,
commonly referred to as the crack pressure, are set at a ow rate of 0.95 L/min
[0.25 gpm] through the valve.

· Leakage is generally measured at rated pressure limits or in the case of relief and
motion control valves at 70-80% of crack pressure setting, with 32 mm2/s (cSt) [151
SUS] uid. See individual catalog sheets for details.

· Temperature ratings vary by model and options. Seal materials provide ranges
of -40 °C to 100 °C [-40°F to 212 °F] (buna-n or polyurethane) or -26 °C to 204 °C
[-15 °F to 400 °F] (viton). The recommended minimum uid viscosity is
12 mm2/s (cSt) [66 SUS] which will override the maximum seal temperature limit
for most uids. Solenoid valves are rated for 60 °C [140 °F] maximum ambient
temperature for continuous duty. Consult factory for extreme applications.

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Cartridge Valves Technical Information Introduction

Fluid and ltration recommendations

FLUIDS

FILTRATION

Ratings and performance data for cartridge valves are based on operating with premium
hydraulic uids containing oxidation, rust, and foam inhibitors.

These premium uids include premium turbine oils, API CD engine oils per SAE J183,
M2C33F or G automatic transmission uids (ATF), Dexron II (ATF) meeting Allison C-3 or
Caterpillar TO-2 requirements, and certain specialty agriculture tractor uids. For further
information see Danfoss publication 520L0463, Hydraulic Fluids and Lubricants Technical

Information.

CAUTION
Never mix hydraulic uids.

Product performance will generally be within catalog limits with uids meeting the
recommended viscosity limits shown below.

Product can be operated at viscosities outside the recommended limits, however
performance may be greatly degraded. Extreme conditions must be evaluated by the
user to determine acceptibility of product performance.

Contact your Danfoss ICS representative for more information regarding uids.

It is imperative that only clean oil be used with cartridge valves to maintain valve
operation and prevent premature wear. System ltration capable of controlling the uid
cleanliness to the limits shown below is required.

The selection of lters depends on a number of factors including the contamination
ingression rate and the desired maintenance interval. Filters are selected to meet the
below requirements using rating parameters of eciency and capacity.

Filter eciency may be measured using a Beta (β) ratio.* A lter with a β-ratio within the
range of β10=10 is typically required.

Since each system is unique, the ltration requirement for that system will be unique and
must be determined by test in each case. It is essential that monitoring of prototypes
and evaluation of components and performance throughout the test program be the
nal criteria for judging the adequacy of the ltration system. For further information
see Danfoss publication 520L0467, Design Guidelines for Hydraulic Fluid Cleanliness

Technical Information.

Fluid specications

Product

Cartridge and

Electrohydraulic valves

* Filter βx ratio is a measure of lter eciency dened by ISO 4572. It is dened as the ratio of the number
of particles greater than a given size (x) upstream of the lter to the number of particles greater than the same
size downstream of the lter. The βx ratio applies to a specic particle size, measured in microns.

Cleanliness

(per ISO 4406, 1999)

18/16/13 or better 12-54 [66-250] 12-400 [66-1854]

Recommended Viscosity limits

mm2/sec (cSt) [SUS]

Absolute Viscosity limits

mm2/sec (cSt) [SUS]

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