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Flow control valves
Flow control valve

2-way flow control valve
Fixed orifice, adjustable pressure compensator
Sandwich construction ®
• Q max = 10 l/min NG3-Mini
• Q N max = 8 l/min
• p = 315 bar
max
DESCRIPTION FUNCTION APPLICATION
Sandwich type 2-way flow control valve. Fitted The 2-way flow control valve is designed Sandwich type flow control valves are used whe-
with 2-way flow control cartridge M18x1,5 in to keep the speed of a consumer constant re the supply volume flow has to be kept constant
accordance with ISO 7789. Type of adjustment irrespective of the load. The fixed measuring even when the load fluctuates. Depending on
available: „S“ = screw adjustment, „D“ = knob orifice which is integrated into the pressure the application, a distinction is made between
adjustment, (see data sheet no. 2.5-510). For compensating piston determines the volume restricting the forward flow or the return flow.
the sandwich plates in A, B and AB, a bypass flow. If there is a pressure change, the pressure These sandwich valves are particularly suitable
non-return valve for reversed free flow is compensating spool is displaced and changes for machine tools and also all types of handling
installed. the outlet diameter in order to keep the pres- operations. The Mini-3 flow control valves are
sure difference across the measuring orifice used where hydraulic systems have to be both
constant. By varying the spring bias acting light and compact.
on the compensator spool, the flow rate can
be changed. Minimum adjustable flow within
40…70 % of Q . Flow regulation is effective
N
above ∆p 10 bar approx.
TYPE CODE

QA S A03 - - #
Flow control valve, 2-way
Type of adjustment Screw S
Turning knob D
Sandwich construction
Mounting interface acc. to Wandfluh standard, NG3-Mini
Type list/Function
in P P in T T
Meter-out flow control in A A in B B
in A and B AB
Meter-in flow control in A AV in B BV
in A and B ABV
Nominal volume flow rate Q 0,4...0,6 l/min 0,63
N
0,8...1,25 l/min 1,25
1,3...2,1 l/min 2
2,5...5 l/min 5
5 ...8 l/min 8
Design index (subject to change)

GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Description 2-way flow control valve Fluid Mineral oil, other fluid on request
Nominal size NG3-Mini acc. to Wandfluh standard Contamination efficiency ISO 4406:1999, class 18/16/13
Construction Sandwich (Required filtration grade ß 6...10 ≥ 75)
Mounting 3 mounting holes for socket head screws refer to data sheet 1.0-50/2
M 4 or double ended screws M4 Viscosity range 12 mm /s...320 mm /s
2
2
Connections Threaded connection plates, Multi-flange Fluid temperature -20...+70 °C
subplates, Longitudinal stacking system Peak pressure p max = 315 bar
Ambient temperature -20…+50 °C Opening pressure
Mounting position any to non-return valve p = 0,2 bar
ö
Fastening torque M = 2,8 Nm (quality 8.8) for fastening screws Minimum pressure for
D
M D = 30 Nm for screw-in cartridge controlled flow ∆p = 10 bar
Weight depending on the type 0,32…0,42 kg Nominal volume flow Q = 0,63 l/min, Q = 1,25 l/min,
N
N
Q N = 2 l/min, Q = 5 l/min,Q = 8 l/min
N
N
Min. volume flow Q = 0,4 l/min
min
Max. volume flow Q max = 10 l/min
Hysteresis depending on nominal volumeflow 3...8 %
For further hydraulic specifications refer to data sheet 2.5-510.

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 2.5-700E 1/2
CH-3714 Frutigen Edition 21 31
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