Drain Valve, Size 3
Seated Design
Type: MDPS ...
Reference: 400--P--405051--E--/08.06
1/3 430.30.32.05
Replaces: M--8
Classification:
S 20 l/min, 315 bar
S Semi-- car tridge, screw--in seat valve
design
S For space-- saving direct mounting in
blocks
S with screw adjuster
S Surface protection:
A3C to ISO 4042
1. Description
This cartridge valve can be used in
manifold blocks, line--mounting
bodies, etc. The MDPS ... drain valve is
a semi--cartridge type. The bottom part
of the stepped cavity forms the valve
seat.
2. Symbols
MDPSA--3S ...
MDPSZ--3S ...
AB
3. Main characteristics
Designation Drain valve
Design cone/seat type
Mounting method screw --in s emi--cartridge
Size nominal size 3 mm
Weight kg 0.03
Mounting attitude unrestricted
Flow direction A ⇒ B (see symbol)
Operating pressure range bar at A: ... 315
at B: ... 050
Flow rate, Qmax l/min 20 *)
Fluids HL and HLP hydraulic oils to DIN 51 524;
for other fluids, please consult BUCHER
Fluid temperature range _C --25 ... +80
Ambient temperature _C --25 ... +80
Viscosity range mm
2
/s
(cSt)
10 ... 650, recommended 15 ... 250
Minimum fluid cleanliness level 18/14 to ISO 4406 / CETOP RP70H; 8 ... 9 to NAS 1638
400--P--405051--E--/08.06
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4. Dimensions
Type MDPSA--3S
Cavity type AS
approx. 42
M6
max. 22 min. 16
(max.19.5)
3 A/F hex. socket
Ma max. 4 Nm
for shutting--off
max. 19.5
17 A/F hex.
for fitting
the cartridge,
tightening torque
Ma = 28 ... 32 Nm
B
A
When fitting the cartridge,
the throttle spindle must not
project more than 19.5 mm
Lock nut
10 A/F hex.,
tightening torque
Ma = 6 ... 7 Nm
Type MDPSZ--3S
approx. 46
M6
max. 22 min. 16
(max.19.5)
3 A/F hex. socket
Ma max. 4 Nm
for shutting--off
max. 19.5
17 A/F hex.
for fitting
the cartridge,
tightening torque
Ma = 28 ... 32 Nm
B
A
When fitting the cartridge,
the throttle spindle must not
project more than 19.5 mm
Lock nut
10 A/F hex.,
tightening torque
Ma = 6 ... 7 Nm
Plas tic
Cap nut
Plas tic
Cap
5. Schematic section
B(T)
A(P)
1
2
B(T)
A(P)
1
2
Type MDPSZ--3S ...
Type MDPSA--3S ...
with cap nut
*) Flow rates must be limited to a maximum of 20 l/min
by an orifice positioned before the valve in the A (P) line.
Seal kit no. DS --346, comprising:
It.
Qty. Description Size
1 1 O--ring no. 013 ∅ 10.82 x 1.78 N90
2 1 O--ring no. 007 ∅ 3.68 x 1.78 N90
6. Installation and servicing
All work must be carried out with care
and by qualified personnel only. Use
the specified tightening torque when fit-
ting the cartridge. Before fitting the car-
tridge, screw the adjusting spindle fully
back (see Dimensions). When chang-
ing seals, oil or grease the new seals
thoroughly before fitting them.
400--P--405051--E--/08.06
3/3
7. Ordering code
M
(blank) = Nitrile seals
V
Special seals -- please consult BUCHER
1 ... 9
= Viton seals
M1--
=
DP S A 3-- S _
= flow-- control valve
DP = throttle cartridge
S = for cavity type AS
A ... Q = standard model -- see relevant data sheets
Y ... R = special features -- please consult BUCHER
3 = nominal size 3 mm
S=screwadjuster
design number (omit when ordering new units)
Z = model with cap nut
Ex.
8. Related data sheets
Old no. New no.
i-- 32 400--P--040011-- E The form --tool hire programme
i-- 33.14 400--P--040202-- E Cavity type AS
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