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POCLAIN HYDRAULICS Hydraulic components - Flow control valves
Flow control valves pressure compensated Throttle with Check valvesFlow dividers
THROTTLE WITH CHECK VALVE VP-NDV (NG 6, 10)
• NG 6, 10
• Up to 350 bar [5 076 PSI]
• Up to 100 L/min [26.4 GPM]
• Connecting dimensions to ISO 4401.
• For flow control in both service lines.
• For throttling in supply - and return lines.
• For vertical stacking - sandwich plate design.
• Height and width of the valves to ISO 7790 norms.
VP-NDV-10-.., VP-NDV-6-..
Operation Hydraulic symbol
Throttle with check valves type VP-NDV are used for throttling the pilot and main flow of
the hydraulic fluid in the line A and B.
These valves consist of two throttling spools with setting
screws and two check valves
which are built in a housing.
In direction V to P (see the hydr
aulic symbol) flows the hydraulic fluid with low pressure
loss through the check valve.
In direction P to V is the hydraulic fluid flow thr
ottled depending on adjustment of the
throttling spool.
Mounting example
Features
Size 6 10
Flow rate L/min [GPM] 60 [15
.8] 100 [26.4]
Operating pressure bar [P
SI] 350 [5 076]
Cracking pressure bar [P
SI]
0,4 [5
.8]
Oil temperature range °C [°
F] -20 to +70 [-4 to +158]
Viscosity range mm
2
/s [SUS] 15 to 380 [69.5 to 1760]
Filtration NAS 1638 8
Mass kg [lb] 1,45 [3.20] 3,3 [7.28]
THROTTLE WITH CHECK VALVES
Dimensions
Throttle closed
Throttle opened
Throttle closed
Throttle opened
Assembly instructions
Throttle/check valves type VP-NDV are designed for vertikal stacking. With these valves there can be throttling of the hydraulic fluid flow in
return line or supply line achieved. Direction of throttling can be selected by turning the installation position of the valve i.e. valves size 6 turning
180° around the longitudial axis; valves size 10 turning 180° around the lateral axis (see drawing above). The O-ring plate is always mounted on
the subplate side.
48 12/12/16
Flow control valves - Hydraulic components POCLAIN HYDRAULICS
1. Nameplate
2. Throttle screw (clockwise
rotation reduces the flow)
3. O-ring plate
4. O-ring 9,25x1,78-4 pcs
5. Fixing bores for fixing
screws M5
'P-Q Performance curves
Size 6
Size 10
V --->P
through non-return
valve
P ---> V
throttle fully open
V --->P
through non-return
valve
P ---> V
throttle fully open
Flow
Diff. pressure
Flow
Diff. pressure
Model code
VNP
Size
Size 6
6
Size 10
10
V
-
-
Seals type
NBR seals for mineral oil HL,HLP to DIN
51524
No designation
FPM seals for HETG, HEES, HEPG to
VDMA 24568 and ISO 15380
E
Special requirements to be briefly specified
-
-
D
*
12/12/16 49
POCLAIN HYDRAULICS Hydraulic components - Flow control valves
Flow control valves pressure compensated Throttle with Check valvesFlow dividers
