3-Way Pressure-Reducing Cartridge, Size 2…4
Q
max
= 20l/min,p
max
= 250bar
Spool-type design,direct acting,with manual adjustment
Series DDRB-7M…
1/5
Reference: 400-P-260501-EN-01
Issue: 03.2012 / Replaces: D-2.170
S Compact construction for cavity type
AM – 3/4-16 UNF to Bucher standards
S 5 pressure ranges available
S Full-flow secondary pressure relief
S Excellent stability over the whole pressure
and flow range
S Available with hand-knob
S All exposed parts with zinc-nickel plating
S Can be fitted in a line-mounting body
1 Description
Series DDRB-7M... screw-in cartridges are direct acting,
spool-type high performance 3-way pressure-reducing
valves. They are available in sizes 2...4 and have a 3/4-16
UNF mounting thread. The straightforward design delivers
an outstanding price/performance ratio and good pressure/
flow ratings. The valves control the required secondary
pressure in port 3 to the value set with the pressure adjust
ment, and independently of the inlet pressure in port 2. In
control mode, the connection 2 3 opens until the pres
sure in port 3 reaches the preset level. If the pressure rises
above the preset level, the control spool opens the 3 1
connection until balance is restored. These 3-way pres
sure-reducing cartridges function as full-flow pressure relief
valves from port 3 1 as soon as the reduced pressure ri
ses above the valve pressure setting. Five spring ranges
are available in order to obtain precise pressure settings
over the whole of the required pressure range. These 3-way
pressure-reducing cartridges are predominantly used in
mobile and industrial applications for reducing a system
pressure. All external parts of the cartridge are zinc-nickel
plated to DIN 50979 and are thus suitable for use in the
harshest operating environments. If you intend to manufac
ture your own cavities or are designing a line-mounting in
stallation, please refer to the section “Related data sheets”.
2 Symbol
3
2 1
3 Technical data
General characteristics Description, value, unit
Designation 3-way pressure-reducing cartridge
Design Spool-type design, direct acting,
with manual adjustment
Mounting method screw-in cartridge 3/4-16 UNF
Tightening torque 50 Nm ± 10%
Size nominal size 2…4, cavity type AM
Weight 0.20 kg
Mounting attitude unrestricted
Ambient temperature range -25°C … +80°C