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	Cartridge valves are compact and economical components that can be used for
INTRODUCTION	directional, pressure, or flow 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, specifications, and settings:
	· Each Danfoss ICS cartridge valve fits 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 flow rating is based on the flow 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] fluid. Note that for many valves this
	flow can be exceeded if the resulting higher pressure drop and the associated heat
	generation are acceptable. The exceptions to this are solenoid-operated spool-
	type directional valves and proportional flow control valves where the flow 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 flow 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 flow 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] fluid. 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 fluid viscosity is
	12 mm2/s (cSt) [66 SUS] which will override the maximum seal temperature limit
	for most fluids. 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 filtration recommendations

FLUIDS	Ratings and performance data for cartridge valves are based on operating with premium
	hydraulic fluids containing oxidation, rust, and foam inhibitors.
	These premium fluids include premium turbine oils, API CD engine oils per SAE J183,
	M2C33F or G automatic transmission fluids (ATF), Dexron II (ATF) meeting Allison C-3 or
	Caterpillar TO-2 requirements, and certain specialty agriculture tractor fluids. For further
	information see Danfoss publication 520L0463, Hydraulic Fluids and Lubricants Technical
	Information.
	CAUTION
	Never mix hydraulic fluids.
	Product performance will generally be within catalog limits with fluids 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 fluids.
FILTRATION	It is imperative that only clean oil be used with cartridge valves to maintain valve
	operation and prevent premature wear. System filtration capable of controlling the fluid
	cleanliness to the limits shown below is required.
	The selection of filters 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 efficiency and capacity.
	Filter efficiency may be measured using a Beta (β) ratio.* A filter with a β-ratio within the
	range of β10=10 is typically required.
	Since each system is unique, the filtration 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
	final criteria for judging the adequacy of the filtration system. For further information
	see Danfoss publication 520L0467, Design Guidelines for Hydraulic Fluid Cleanliness
	Technical Information.
	Fluid specifications
	Product	Cleanliness	Recommended Viscosity limits	Absolute Viscosity limits
		(per ISO 4406, 1999)	mm2/sec (cSt) [SUS]	mm2/sec (cSt) [SUS]
	Cartridge and	18/16/13 or better	12-54 [66-250]	12-400 [66-1854]
	Electrohydraulic valves

* Filter βx ratio is a measure of filter efficiency defined by ISO 4572. It is defined as the ratio of the number of particles greater than a given size (x) upstream of the filter to the number of particles greater than the same size downstream of the filter. The βx ratio applies to a specific particle size, measured in microns.

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