Page 1142 - Softbound_Edition_19_en

Restrictor valves Restrictor valves
Restrictor valve

2
CHARACTERISTICS Oil viscosity υ = 30 mm /s Restrictor valve with reverse free flow check
∆p = f (Q) Pressure loss / volume flow diagram Q = f (n) Volume flow - adjustment characteristics Sandwich construction
2 → 1 over check valve by closed restrictor Q = 8 l/min • Q = 20 l/min ®
N
1 → 2 restrictor complitly open max NG4-Mini
p [bar] Q = 8 l/min Q [l/min] • Q = 12 l/min
N
N
8 K0008 10 K0007 ∆p = 20 bar • p = 315 bar
∆p = 10 bar max
6 8 ∆p = 5 bar
A PT B 6 A PT B
4 DESCRIPTION FUNCTION APPLICATION
2 1 4 Restrictor valve sandwich design NG4-Mini with Using the precision thread adjusting spind- Sandwich type, one-way restrictors are used
2 2 connecting diagram pursuant acc. to Wandfluh le, the restriction of the volume flow can be where volume flows have to be controlled in one
1 2 standard. The non-return throttle valve is continuously adjusted. With the spindle fully flow direction according to the load. Depending
0 A PT B 0 A PT B available in two different variants, namely the screwed home, the volume flow is zero, and a on the application, a distinction is made between
0 1 2 3 4 5 6 7 8 Q [l/min] 0 1 2 3 4 5 n [-] standard and the precision throttle (FD). The metallic edge makes a leak-tight closure. In the restricting the forward flow or the return flow.
∆p = f (Q) Pressure loss / volume flow diagram Q = f (n) Volume flow - adjustment characteristics rotary control is made from aluminium, all other opposite direction, the spring-loaded tapered These sandwich valves are particularly suitable
2 → 1 over check valve by closed restrictor Q = 3,2 l/min parts, have been phosphated. piston opens and volume flow with a load for machine tools and also all kinds of handling
N
1 → 2 restrictor complitly open A PT B A PT B pressure drop is enabled. The throttle effect operations. Mini-4 one-way restrictors are used
p [bar] Q = 3,2 l/min Q [l/min] is produced ba an annular gap which can be where hydraulic systems have to be both light
N
25 K0005 5 K0006 ∆ p = 20 bar varied in size, or by means of a triangular edge. and compact.
20 4 Because of the nature of the design, there is
only a small amount of leakage.
∆ p = 10 bar
15 3
∆ p = 5 bar
10 2
2 1 1 2 TYPE CODE
5 1
B URD 4 #
0 0
0 1 2 3 4 5 Q [l/min] 0 1 2 3 4 5 n [-] Mounting interface acc. to Wandfluh standard
DIMENSIONS Throttle check valve
Meter-out: 20 Type list / function
13 10 10 20 Meter-out in A A in B B

in A and B
Meter-in in A VA in B VB
∗ P ∗ in A and B V
A B Nominal size 4-Mini
11 21 30
T To 15 Standard
Precision throttle - FD
∅ 4,2 30 B=3,7 96 A=3,7 Design-Index (Subject to change)
DR.SA03-A GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS
Denomination Restrictor valve with reverse free flow check Fluid Mineraoil, other fluid on request
Meter-in: DR.SA03-B Nominal size NG4-Mini acc. to Wandfluh standard Contamination efficiency ISO 4406:1999, class 20/18/14…21/19/15
DR.SA03-AB Construction Sandwich (Required filtration grade ß 10…25 ≥ 75)
40 30 Mounting 3 mounting holes for socket head cap screws refer to data sheet 1.0-50/2
M5 or stud screws M5 Viscosity range 12 mm /s…320 mm /s
2
2
P
∗ A B ∗ Connections Threaded connection plates, Multi-flange Fluid temperature -20...+70 °C
= 315 bar

p
subplates, Longitudinal stacking system
Peak pressure
Ambient temperature -20…+50 °C Pressure required to open max
T To Mounting position any the check valve p = 2,2 bar
ö
Fastening torque M = 5,5 Nm (Qual. 8.8) for fastening screws Nominal volume flow rates Q = 12 l/min
N
D
1,2 30 1,2 Weight Depending on the type 0,8…0,9 kg Q at 10 bar valve pressure loss
N
DR.SA03-AV Max. volume flow Q max = 20 l/min
DR.SA03-BV Leakage volume flow Almost leak free with closed restrictor
DR.SA03-ABV
TYPE LIST / FUNCTION
∗ The total lenghts depends on the cartridge type,
see data sheet no. 2.4-610. Meter-out: Meter-in:
BURDA4 BURDVA4 Valves for restricting the meter-in flow are
PARTS LISTS SCREW-IN CARTRIDGES INSTALLED achieved by turning the one-way
The following screw-in cartridges are used in the sandwich body: A PT B A PT B restrictors (horizontal axis):
Position Article Description BURDA4 get BURDVB4
Type Designation Data sheet no. BURDB4 BURDVB4 BURDB4 get BURDVA4
10 160.2045 O-ring ID 4,5x1,5 DR.PM18 Restrictor valve with BURD4 get BURDV4
20 238.4401 Plug VSTI M18x1,5-OR reverse free flow check 2.4-610 Valves for restricting the meter-in flow are
30 173.0650 Sealing plate PDSA03 A PT B A PT B supplied with a sealing plate and an
40 173.0700 Intermediate plate PZSA03 Technical explanation see data sheet 1.0-100 intermediate plate.
BURD4 BURDV4
A PT B A PT B
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 2.4-800E 2/2 Postfach Fax +41 33 672 72 12 Internet: www.wandfluh.com Data subject to change 2.4-835E 1/2
CH-3714 Frutigen Edition 21 31 CH-3714 Frutigen Edition 03 40
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20 28
14

P
∅ 5,5 A B
40 28,5 27 T To 14

44 27
30
A=71
B=71
40 30 37 88 37
15
P
A B
T To

1,5 30 1,5 10 VA=71
VB=71
V=88