Page 918 - Softbound_Edition_19_en

Ø
Ø 7,5 s19
4,2
)
5
(
6
s
30 25 Pressure reducing valves Pressure reducing valves
Pressure reducing valve
8,1 38 68 32
CHARACTERISTICS oil viscosity υ = 30 mm /s Pressure reducing valve
2
150,1
p = f (Q) Pressure volume flow characteristics p = f (Q) Pressure volume flow characteristics Flange- and sandwich construction
red
red
(Maximal adjustable pressure) (Minimal adjustable pressure) • Pilot operated ®
150,1 (MD.SA03-P) ∗ Consumption resistance dependent on system • Q = 20 l/min NG4-Mini
p [bar] Ø 4,2 p [bar] max
K0011 20 K0012 • p = 400 bar
200 • p max = 350 bar
160 P N red = 200 bar 15 P N red = 80 bar N red max
120 10 P N red = 32 bar DESCRIPTION FUNCTION APPLICATION
P N red = 200 bar
80 Flange or sandwich type pilot operated 3-way The spool, located in the pilot operated main Pressure reducing valves are used for keeping
P N red = 80 bar 5 pressure reducing valve NG4-Mini in accor- section of the valve, is held in the reset position the pressure constant in a consumer, irrespec-
40  ∗
P N red = 32 bar dance with Wandfluh standard. Screw-in by a spring. The connection to the consumer tive of pressure fluctuations on the supply side.
0 0 cartridge M22x1,5 in according with ISO 7789. is fully open. With the pilot stage which is If several consumers are used, the reduced
90
70
50
8 7 6 5 4 3 2 1 0 1 2 3 4 5 6 7 8 60 40 100 8 6 4 2 0 2 4 6 8 The valve reduces the inlet pressure to a preset designed as relief valve, reduced pressure is pressure can be set individually with the aid if
A  T Q [l/min] P  A A  T Q [l/min] P  A output pressure. The integrated pressure relief adjustable. It opens when the set value is rea- one pressure control valve for each consumer.
20 function prevents the reduced pressure from ched. As a result, a pilot volume flows through Generally speaking, pressure control valves
p = f (n) Pressure adjustment characteristics ∆p = f (Q) Pressure loss/flow characteristics being exceeded as a result of external forces. the nozzle in the spool. The resultant pressure are used for reducing a hydraulic pressure to
10
red
[at Q = 0 l/min (static)] over non-return valve Two types of setting and three pressure stages difference displaces the spool towards the a lower level. The integrated pressure relief

p [bar] A P B P N red = 200 bar p [bar] are available. A pressure gauge connection is spring. The volume flow is throttled in the valve function obviates the need for any additional
K0010 T To 11 21 16 K0013 provided in the reduced connection. A bypass inlet and the reduced pressure is controlled. If pressure relief valve in the reduced pipe. Di-
200 non-return valve plate for the flange valve – for forces acting on the actuator allow the reduced rectly operated pressure reducing valves also
160 12 free flow from A to P – can be ordered separa- pressure to exceed the set value, the spool is keep the reduced pressure stable, even under
120 8 tely. The flange valve body is painted, the other displaced until the valve inlet closes and the very difficult operating conditions. Mini-4 valves
are used where both, reduced dimensions and
parts are phosphatised.
reduced pressure port is being connected to
P N red = 80 bar
80 tank. The pressure increase is then limited. weight are important.
40 P N red = 32 bar 4
0 0
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 n [-] 0 1 2 3 4 5 6 7 8 Q [l/min] TYPE CODE
M V A04 - - #
TYPES / DIMENSIONS
Flange construction Ø 7,5 MD.FA03-P/A Pressure reducing valve
MD.FA03-P/A Pilot operated
Ø 4,2 s19
) Type of adjustment Kay S
5
( Control knob D
6
s
Flange design F
30 25 Sandwich design S
A P T Mounting interface acc. to Wandfluh standard, NG4-Mini
8,1 38 68 32 Type list / function Flange design Sandwich design
Sandwich construction 150,1 P → A P/A in P P
MD.SA03-P in A A
MD.SA03-P
in B B
A P red T B A P T B A P T B 150,1 (MD.SA03-P) Pressure range p 63 bar 63
Ø 4,2 N red 160 bar 160
350 bar 350
Design-Index (Subject to change)
A P T B A red P T B A P T B red
PARTS LIST
GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Position Article Description 70 50 90 60 40 100 Description Pilot operated pressure control valve Fluid Mineral oil, other fluid on request
Nominal size NG4-Mini according to Wandfluh standard Contamination efficiency ISO 4406:1999, class 18/16/13
40 153.1605 Hexagonal nut 0,5D M12 x 1 20 Construction Flange- or sandwich Required filtration grade ß 6…10≥75)
50 246.0109 Cylinder screw M3 x 8 DIN912 10 Spindle not secured Mounting 3 mounting holes for zyl. screws M5 or refer to data sheet 1.0-50/2
2
2
55 246.0131 Cylinder screw M3 x 30 DIN912 P against unscrewing Connection double ended screws M5 Viscosity range 12 mm /s…320 mm /s
Threaded connection plates
-20…+70 °C
Fluid temperature
60 246.0136 Cylinder screw M3 x 35 DIN912 T A B To 11 21 Multi-flange subplates Peak pressure p max = 400 bar
70 238.1405 Plug screw VSTI G1/8"-ED Longitudinal stacking system Nominal pressure ranges p N red = 63 bar, p N red = 160 bar
90 160.2045 O-ring ID 4,5 x 1,5 Ambient temperature -20…+50 °C Opening pressure p N red = 350 bar
Mounting position
any
100 114.1226 Turning knob ACCESSORIES Fastening torque M = 5,5 Nm (qual. 8.8)for fastening screws to non-return valve p = 2,2 bar
Threaded connection plates and multi flange plates Register 2.9 M = 50 Nm for screw-in cartridge Volume flow Q = 0…20 l/min
D
ö
D

Weight Depending on the type 1,4…1,53 kg For futher hydraulic specifications see data sheet 2.2-530
Technical explanation see data sheet 1.0-100
Wandfluh AG Tel. +41 33 672 72 72 E-mail: sales@wandfluh.com Illustrations not obligatory Data sheet no. Wandfluh AG Tel. +41 33 672 72 72 E-mail: sales@wandfluh.com Illustrations not obligatory Data sheet no.
Postfach Fax +41 33 672 72 12 Internet: www.wandfluh.com Data subject to change 2.2-605E 2/2 Postfach Fax +41 33 672 72 12 Internet: www.wandfluh.com Data subject to change 2.2-620E 1/2
CH-3714 Frutigen Edition 21 30 CH-3714 Frutigen Edition 05 04
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A P T

A P red T B A P T B A P T B

A P T B A red P T B A P T B red