DIRECTIONAL VALVES
MD10-40 Manual, Spring Return, Push-to-Shift
DESCRIPTION
A 4-way, manual, push-to-shift, spring-return, directional hydraulic cartridge valve.
Series operation is prohibited due to the tank port (
➀) pressure rating.
OPERATION
In its steady-state spring-offset position, the MD10-40 directs fl ow from ➃ to ➂,
and from
➁ to ➀ (tank).
In the actuated (pushed) position, the cartridge directs fl ow from
➁ to ➂, and from
➃ to ➀. Note that all ports are open in transition.
Note: Pressure at port
➀ will directly act on the spool and spring. Port ➀ is
intended to be a tank port only.
When the valve is actuated (pushed in) it can be detented by holding in and turning
the knob clockwise 90°. When released, the valve will remain in the actuated position.
To return the valve to its steady state, push in the knob and turn the handle
counterclockwise.
FEATURES
• Hardened spool and cage for long life.
• Optional detent position.
• Industry common cavity.
RATINGS
Operating Pressure:
On
➁, ➂ and ➃: 207 bar (3000 psi)
On
➀ (Max.): 14 bar (200 psi)
Cycle Life: 100,000
Flow: See Performance Chart
Internal Leakage: 82 cc/minute (5 cu. in./minute) max.
Temperature: -40 to 120°C
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC10-4; See page 9.110.1
Cavity Tool: CT10-4XX; See page 8.600.1
Seal Kit: SK10-4X-MMT; See page 8.650.1
USASI/ISO:
SYMBOLS
4.640.1
PERFORMANCE (Cartridge Only)
32 cSt/150 ssu oil at 40°C
10.3/150
8.3/120
6.2/90
4.1/60
2.1/30
22.7
6
30.2
8
37.9
10
15.1
4
7.5
2
FLOW lpm/gpm
PRESSURE DROP bar/psi
➃
to
➀
➁
to
➀
➂
to
➁
➂
to
➃
Patent
Pending
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
Cartridge: Weight: 0.32 kg. (0.70 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Aluminum knob.
Standard Ported Body: Weight:
0.34 kg. (0.75 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.010.1
DIMENSIONS
MATERIALS
TO ORDER
MD10-40
4.640.2
0.35
Max.
STROKE
FORCE-
16.94 lbs. max.
8.89
MD10-40 __ - __ __ __ - __
Seals
N Buna N (Std.)
V Fluorocarbon
Porting
Cartridge Only 0
SAE 6 6T
SAE 8 8T
1/4 in. BSP* 2B
3/8 in. BSP* 3B
*BSP Body; U.K. Mfr. Only
Option
Threaded Shaft w/o Detent T
Threaded Shaft with Detent R
Aluminum Knob w/o Detent K
Aluminum Knob with Detent D
Patent Pending
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.