Page 48 - Dual-line-automatic

Change-over valve

DU 1

Valves

Description
Technical data
Available in pneumatic, electric or hydraulic versions, DU 1
change-over valves are designed primarily for use in dual-line Function principle change-over valve, hydraulic,
lubrication systems These change-over valves alternately discharge Operating temperature pressure operated 4/2 way valves
–20 to +80 °C
lubricant, fed by the pump into one of the two main lines while the –4 to +176 °F
other line is connected to the return line connection of the pump Lubricant grease up to NLGI 3,
The switching pressure is adjustable oil with a viscosity of min 20 mm 2 /s
Flow rate 14 dm 3 /h, 3.7 gal/h
Operating pressure max 350 bar, 5 075 psi
Change-over pressure min 140 bar, max 350 bar,
Features and benefits min. 2 030 psi, max. 5 075 psi
Main line connection G /2 female BSPP
1
• Reliable, even for hard grease
Electrical connection max 500 V, 25–60 Hz
• Change-over process initiated automatically Protection class IP 67
once preset pressure is reached Dimensions depending on the model
min 195 × 190 × 100 mm
• Maximum operating pressure of 350 bar (5 076 psi) max 195 × 195 × 195 mm
min. 7.8 × 7.8 × 4.0 in
• Various mounting positions
max. 7.8 × 7.8 × 7.8 in
• Works effectively in temperatures ranging Mounting position any
from –20 to +80 °C (–4 to +176 °F)

Applications
• Ideal for small, electrically driven dual-line systems
that requires minimal monitoring

DU 1 Change-over valves mounted on a base plate NOTE
Further technical information, technical drawings,
Order number Designation Description
accessories, spare parts or product function descriptions
617-28683-1 DU1–G are available on SKF com/lubrication
617-28619-1 DU1–GK with indicator pin
617-36148-9 DU1–GKN with proximity switch
617-28620-1 DU1–GKS with indicator pin and limit switch

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