Proportional Pressure-Relief Cartridge Valve, Size 1
Qmax = 1.5 l/min, pmax = 420 bar
Pilot valve, seated design, direct acting
Series DVSA-1L…
S Can be used as a pilot valve
S Compact construction for
cavity type AL – 3/4-16 UNF
S Operated by a proportional solenoid
S In a power failure, the pressure setting drops
to the minimum value
S 5 pressure ranges available
S All external parts zinc plated, chromited (CrVI-free)
S High pressure wet-armature solenoids
S The slip-on coil can be rotated, and it can be
replaced without opening the hydraulic envelope
S Various plug-connector systems and voltages
are available
S Can be fitted in a line-mounting body

1

Description

These proportional pressure-relief cartridges, series
DVSA-1L…, are size 1 pilot valves featuring a seat-valve
design and a 3/4-16 UNF mounting thread. With these pres­
sure-relief cartridges, the relief pressure is dependent on
the electrical control signal and can be continuously varied.
When the solenoid is de-energised (initial position), con­
nection 2 → 1 is open and the minimum pressure (free flow)
depends on the flow rate. Any pressure at port 1 is additive
to the valve setting at port 2, therefore port 1 should prefera­
bly be connected directly to tank. In control mode, the relief
pressure is proportional to the change in the required value
(amplifier output current). In order to obtain precise pres­
sure settings over the whole of the required pressure range

2

(optimum resolution), the pressure relief cartridges are
available in five pressure levels. These proportional pres­
sure-relief cartridges are primarily used as pilot valves,
mainly in mobile and industrial applications to allow a pres­
sure in hydraulic installations to be limited electro-propor­
tionally. All external parts of the cartridge are zinc plated
and chromited (CrVI-free) and are thus suitable for use in
the harshest operating environments. The slip-on coils can
be replaced without opening the hydraulic envelope and
can be positioned at any angle through 360°. If you intend
to manufacture your own cavities or are designing a linemounting installation, please refer to the section “Related
data sheets”.

Symbol
1

2

3

Technical data

General characteristics

Description, value, unit

Designation

proportional pressure-relief cartridge valve

Design

pilot valve, seated design, direct acting

Mounting method

screw-in cartridge 3/4-16 UNF

Tightening torque

40 Nm  ± 10 %

Size

nominal size 1, cavity type AL

Weight

0.40 kg
Reference: 400-P-580101-E-01

Issue: 01.2012

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