Page 314 - Softbound_Edition_19_en

Spool valve
Spool valve Spool valve

TYPE CODE ACTUATION INSTALLATION NOTES
WF F F A10 - - - - # Actuation Hydraulically operated Mounting type Flange mounting
Spool valve, direct operated Pilot pressure Recommended p = 20 bar 4 fixing holes for
v
∆p (x-y) < 3 bar for a stable position socket head screws M6 x 40
Hydraulically actuated
∆p (x-y) > 12 bar for secure switching Mounting position Any, preferably horizontal
Flange construction Tightening torque M = 10.5 Nm ± 10 %, quality 8.8
D
International standard interface ISO, NG10 Note! The length of the fixing screw depends on the base
material of the connection element.
Designation of symbols acc. to table

Pilot oil via control plate te
via mounting interface ae
Sealing material NBR PERFORMANCE SPECIFICATIONS
FKM (Viton) D1 Oil viscosity u = 30 mm /s
2
NBR 872 y-Z604
p = f (Q) Performance limits Q = f (Q) Leakage volume flow characteristics
Orifice diameter Q0,9 up to 70 bar pilot pressure L per control edge
Q0,7 up to 160 bar pilot pressure
Q0,6 up to 350 bar pilot pressure p [bar] Q [cm /min]
3
350 K4263 200 K4264
Surface protection Standard 300
Zinc-nickel K8 250 150
200
Design index (subject to change) 150 100
1.7-42 100 50
50
0 Q [l/min] 0 p [bar]
GENERAL SPECIFICATIONS HYDRAULIC SPECIFICATIONS 0 20 40 60 80 100 120 140 160 0 50 100 150 200 250 300 350

Designation 4/2-, 4/3-spool valve Working pressure p = 350 bar
max
Construction Direct operated Tank pressure p T max for te = 160 bar
Mounting Flange construction p T max for ae = 70 bar Δp = f (Q) Pressure drop-volume flow characteristics Volume flow direction
Nominal size NG10 according to ISO 4401-05 Maximum volume flow Q = 160 l/min, see characteristics ∆p [bar] Symbol P - A P - B P - T A - T B - T
max
Actuation Hydraulically operated Leakage oil See characteristics 20 K4265 1 BA1 / BA2 / BA3 3 3 - 2 1
Ambient temperature -25…+70 °C Fluid Mineral oil, other fluid on request 15 2 BCA 3 3 - 2 1
2
2
Weight 3,0 kg Viscosity range 12 mm /s…320 mm /s 3 BDA 3 3 - 2 1
MTTFd 150 years Temperature range -25…+70 °C (NBR) 10
fluid -20…+70 °C (FKM) 5
-40…+70 °C (NBR 872) 0
Contamination Class 20 / 18 / 14 0 20 40 60 80 100 120 140 160 Q [l/min]
efficiency
Filtration Required filtration grade ß 10…16 ≥ 75,
see data sheet 1.0-50

ACCESSORIES SURFACE TREATMENT

Fixing screws Data sheet 1.0-60 Standard:
Threaded subplates Data sheet 2.9-40 -The valve body is painted with a two component paint
-The screw plug and the control plate are zinc-nickel coated
Multi-station subplates Data sheet 2.9-70
Horizontal mounting blocks Data sheet 2.9-110 Optionally (K8):
STANDARDS SEALING MATERIAL Technical explanations Data sheet 1.0-100 -All external parts are zinc-nickel coated
Mounting interface ISO 4401-05 NBR or FKM (Viton) as standard, choice in the type code Filtration Data sheet 1.0-50 ISO 9227 (800 h) salt spray test
Contamination ISO 4406
efficiency

www.wandfluh.com Illustrations are not binding Data subject to change 2/4 Edition: 22 09 1.7-42 E www.wandfluh.com Illustrations are not binding Data subject to change 3/4 Edition: 22 09 1.7-42 E
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