3Rev. C, April 2017
INTRODUCTION Moog D680 Series Proportional Control Valves
PRODUCT OVERVIEW
3
INTRODUCTION
Rev. C, April 2017
Moog D680 Series Proportional Control Valves
PRODUCT OVERVIEW
The Moog D680 Series Proportional Control Valves are
throttle valves for 2-, 3-, 4- and 5-way applications. These
valves are suitable for electrohydraulic position, velocity,
flow or force control systems, including those with high
dynamic response requirements. This product family is
equipped with integrated electronics and closed-loop
spool position control.
The D680 is a two-stage valve with a D633 Direct
Drive Valve as a pilot stage. The D633 pilot valve is
characterized by its high dynamics and very low leakage.
It is suited for very high dynamic requirements, while
offering outstanding efficiency. The very high pressure
efficiency of the D633 Series makes it the first choice for
applications involving low pilot pressures.
With a robust, proven design the Moog D680 Series
provides reliable control for injection and blow molding
equipment, die casting machines, presses, heavy industry
equipment and paper and lumber processing machinery
as well as other applications. This product family is easily
integrated and configurable to meet your exact application
and performance requirements. With a long legacy in
hydraulic motion control and application expertise, Moog
experts can help you select the version that best meets
your needs.
For applications with safety requirements, a fail-safe
option is available that guarantees a defined safe spool
position to avoid potential damage.
D681 D682 D683 D684 D685
Valve design 2-stage, pilot-operated
Size according
to ISO 4401
05 07 08 10
Mounting
pattern
ISO 4401-05-05-0-05
with T
1
ISO 4401-07-07-0-05 ISO 4401-08-08-0-05 ISO 4401-10-09-0-05
Rated flow at
Δp
N
5 bar (75
psi)/spool land
30/60/80/2 x 80 l/min
(7.9/15.9/21.1/
2 x 21.1 gpm)
150/250 l/min
(39.6/66 gpm)
350 l/min
(92.4 gpm)
550 l/min
(145.3
gpm)
1,000 l/min
(264.2
gpm)
1,500 l/min
(396.3
gpm)
Maximum
flow
1)
180 l/min (47.6 gpm) 600 l/min (158.5 gpm) 1,100 l/min
(290.6
gpm)
1,500 l/min
(396.3
gpm)
3,600 l/min (951 gpm)
Maximum
operating
pressure
- port P, A, B
350 bar (5,000 psi)
Step response
time for 0 to
100 % stroke
11 ms 11 to 13 ms 10 to
18 ms
12 to
27 ms
35 ms 40 ms
1) For recommended mean flow velocity of 30 m/s
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