Pressure-Relief Cartridge Valve, Size 10
Q
max
= 140l/min,p
max
= 450bar
Direct acting, positive seat design
Series DDPB-1C…
1/4
Reference: 400-P-270101-EN-01
Issue: 09.2021
S Positive seat design gives near zero-leakage closure
of ports A and B
S Good override characteristics due to dynamic poppet
stroke assistance
S Pressures to 450 bar, all ports (see spring ranges in
model code key)
S Ideal for back-pressure and anti-shock service (fast and
stable response)
S Available as cartridge or in DC-12-line mounting body
S Also available in ISO / CETOP 05 stack-mounting bodies
(315 bar max.)
1. Description
Series DDPB-1C-10 ... cartridges are direct acting pres
sure relief valves. Their positive seat design ensures vir
tually zero-leakage, and they are designed to fit BUCHER
cavity type DC. The spring chamber is internally drained to
port B. Any pressure in port B is additive to the spring pres
sure setting, therefore port B should preferably be con
nected to tank (see also externally drained model
DDPB-3D ...). Thoroughly oil or grease external seals be
fore fitting the cartridge in a DC cavity. The cartridge can be
tightened with a 27 A/F OE spanner (note the recom
mended tightening torque). Form tools are available for
sale or hire, should customers wish to machine their own
cavities. For line- and manifold mounting body type DC-12
see related data sheet.
2. Symbols
BA
DDPB-1C-10 ...
3. Characteristics
Type pressure relief cartridge valve
Design direct acting, positive seat (poppet)
Mounting method screw-in cartridge
Size 10 mm nominal size, BUCHER cavity DC
Mass kg 0,35
Mounting attitude unrestricted
Flow direction A = pressure inlet, B = pressure outlet (Tank)
Operating pressure bar ... 450 max. in A and B
Adjustment ranges,
see performance curves
bar pressure range P = 350 ... 450
pressure range O = 300 ... 400
pressure range N = 180 ... 350
pressure range M = 80 ... 240
pressure range L = 10 ... 100
Flow rate Q max. l/min 140, see performance limits
Fluids Hydraulic oils HL and HLP to DIN 51 524
other fluids - contact BUCHER
Fluid temperature range _C -25 ... +80
Viscosity range cSt 10 ... 650 mm
2
/s, recommended 15 … 250 mm
2
/s
Minimum fluid cleanliness 20/18/15 to ISO 4406 : 1999
400-P-270101-EN-01/09.2021
Series DDPB-1C…
2/4
4. Performance characteristics
Oil viscosity 33 cSt
p (bar)
Q (l/min)
14020 60 100 14020 60 100 14020 60 100
DDPB-1C-10-SP DDPB-1C-10-SO DDPB-1C-10-SN
500
400
300
200
100
500
400
300
200
100
400
300
200
100
14020 60 10014020 60 100
DDPB-1C-10-SLDDPB-1C-10-SM
Performance limits
300
200
100
150
100
50
Q (l/min)
Q (l/min)
Q (l/min)
Q (l/min)
p (bar)
p (bar)
p (bar)
p (bar)
Performance limits
Performance limits
Performance limits
Performance limits
5. Dimensions
max. 103
max. 137,5
34,5
M10 x 1
ø 30
M24 x 1,5
ø 21,8
B
A
10
11
ø 19
ø 20,5
Line- and manifold-
mounting body
type DC-12
Cavity type DC
27 A/F hex.
Tightening torque
Ma = 100 Nm +/-10%
for fitting the cartridge
5 A/F int. hex. for
pressure adjustment
16 A/F
Locknut
24 A/F hex.
Tightening torque
Ma = 80 Nm +/−10%
400-P-270101-
EN-01/09.2021
Series DDPB-1C…
3/4
6. Schematic section
Seal kit no. DS-207-N, comprising:
Itm. Qty. Description Dimension
1 1 Sealing ring 22,1 / 16,1 x 2,5
2 1 O-ring no. 021 23,52 x 1,78 N90
7. Installation and servicing
All installation and servicing must be carried out with care,
and by qualified personnel only. When changing seals, the
new seals must be thoroughly oiled or greased before they
are fitted. Use the correct tightening torque when fitting the
threaded bush.
8. Model code key
DDP
A ... Q
Z ... R
1
C
10
S
P
O
N
M
L
(Blank) = Nitrile seals (standard)
V
1 ... 9
Line- and manifold-mounting body (G 1/2”)
=
=
=
=
=
=
=
=
=
=
=
=
= Viton seals
=
=1 ... 9
Direct acting pressure relief cartridge
Standard model per relevant data sheet
Special features by arrangement
Control type 1
for BUCHER cavity type DC
Nominal size 10 mm
With screw adjustment
Pressure range 350 ... 450 bar
Pressure range 300 ... 400 bar
Pressure range 180 ... 350 bar
Pressure range 80 ... 240 bar
Pressure range 10 ... 100 bar
Special seals by arrangement (contact BUCHER)
Design no. (omit when ordering)
Design no. (omit when ordering)
Ex.
DDP B - 1 C - 10 - S N _ - 1
+ DC - 12 - 2
A
B
2
1
400-P-270101-EN-01/09.2021
Series DDPB-1C…
4/4
9. Related data sheets
Old no. New no.
i-32.00 400-P-040011-EN The Form Tool hire programme
i-45.10 400-P-060111-EN BUCHER cavity type DC
D-3.32
400-P-270201-EN Pressure relief- or sequence cartridge valve, series DDPB-3D ...
G-24.20 400-P-740101-EN Line- and manifold mounting body type DC-12 (G 1/2”)
www.bucherhydraulics.cominfo.ch@bucherhydraulics.com
Classification: 450300.305.320.355
E 2020 by Bucher Hydraulics AG Frutigen, CH-3714 Frutigen
All rights reserved.
Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The
information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual
improvement, we reserve the right to amend the product specifications contained in this catalogue.