Created on 03/07/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
DNDM
4-way, manually-operated, directional spool valve
SERIES 1 / CAPACITY: 40 L/min. / CAVITY: T-31A
L-Control, N-Spool L-Control, C-Spool
L-Control, D-Spool L-Control, E-Spool
L-Control, H-Spool L-Control, L-Spool
L-Control, R-Spool L-Control, T-Spool
L-Control, U-Spool L-Control, Y-Spool
This manually operated, 2-position, 4-way directional cartridge is a direct-acting, balanced spool valve used to
control the direction of flow in a hydraulic circuit. Manual operation is achieved via Sun's Twist/Lock manual
override mechanism and is designed for intermittent (infrequent) use only.
TECHNICAL DATA
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 160 cc/min.@210 bar
Operating Torque 1,2 Nm
Seal kit - Cartridge Buna: 990-431-007
Seal kit - Cartridge EPDM: 990-431-014
Seal kit - Cartridge Viton: 990-431-006
(L)CONTROL
L Twist/Lock (Detent) Manual Override
D Twist/Lock (Dual) Manual Override
T Twist (Momentary) Manual Override
(N)SPOOL CONFIGURATION
N Through, Shift to Cross
C Closed, Shift to Through
D Closed, Shift to Cross
E Cross, Shift to Closed
H Open, Shift to Cross
L Cross, Shift to P to A, B and T Blocked
R Regen, Shift to Cross
T Tandem, Shift to Through
U Through, Shift to Tandem
Y Motor, Shift to Cross
(N)SEAL MATERIAL
N Buna-N
E EPDM
V Viton
snhy.com/
DNDM
TECHNICAL FEATURES
This valve is designed for intermittent use such as a manual override. The manual control assembly has a mechanical life expectancy of approximately 7,000
cycles.
The momentary/twist control option "T" allows the operator to momentarily shift the valve by twisting the knob clockwise and releasing. Once released, the valve
returns to its normal position.
The detent/lock control option "L" allows the operator to shift the valve into a mechanically detented position by twisting the knob counter-clockwise. This detented
position will be maintained until the operator twists the knob clockwise and allows the valve to return to its normal position. Please note that the detented position
is not intended for load holding applications but for temporary shifting only.
The dual-operation control option "D" allows the operator to either shift the valve momentarily by twisting the knob clockwise or shift it into a mechanically detented
postion by twisting counter-clockwise. Please note that the detented position is not intended for load holding applications but for temporary shifting only.
The control on this valve is meant to be operated by a person's hand. The control should not be modified, for instance fastening a lever to the knob. Under no
circumstances should the control be operated by other mechanical devices.
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids, greases and lubricants will damage
Model Code Example: DNDMLNNCONFIGURATION OPTIONS
Created on 03/07/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
the seals.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge
machining variations.
PERFORMANCE CURVES
