FLOW CONTROLS
NV08-23 Needle Valve, Fine Adjustment
DESCRIPTION
A screw-in, cartridge-style, variable orifi ce, fi ne adjustment, hydraulic fl ow
restrictor valve.
OPERATION
The NV08-23 increases its orifi ce value from fully closed to fully open with
counterclockwise adjustment rotation.
FEATURES
• Adjustments cannot be backed out of the valve.
• Desired settings may be locked down.
• Hardened parts for long life.
• Aluminum knob option.
• Positive shut-off.
• Linear adjustment.
• Compact size.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow: 38 lpm (10 gpm) nominal at 165 bar (2400 psi) fully open
Internal Leakage: 0.25 cc/minute (5 drop/minute) max. at shut-off
Adjustment Torque Required: 0.56 Nm (5 inch-pounds) at 7 bar (100 psi);
5.41 Nm (48 inch-pounds) at 207 bar (3000 psi)
Operating Temperature: -40 to 100°C (-40° to 212°F) with standard Buna N seals
-26 to 204°C (-15°F to 400°F) with Fluorocarbon seals
-54 to 104°C (-65°F to 225°F) with Polyurethane seals
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: VC08-2; See page 9.108.1
Cavity Tool: CT08-2XX; See page 8.600.1
Seal Kit: SK08-2X-M; See page 8.650.1
USASI/ISO:
SYMBOLS
PERFORMANCE
(Cartridge Only)
5.050.1
HYDRAFORCE
.com
®
138
2000
172
2500
103
1500
69
1000
34
500
15.9
4
22.7
6
7.6
2
30.3
8
37.9
10
45.4
12
FLOW lpm/gpm
PRESSURE DROP bar/psi
Pressure Drop vs. Flow
32 cSt/150 sus oil at 40°C
Blue rectangles are links to other catalog pages.
NV08-23__ - __ __ __ - __
Cartridge: Weight: 0.11 kg. (0.25 lbs.)
Steel with hardened work surfaces.
Zinc-plated exposed surfaces.
Buna N O-rings and polyester
elastomer back-ups standard.
Anodized aluminum knobs.
Standard Ported Body: Weight:
0.16 kg. (0.35 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.008.1
DIMENSIONS
MATERIALS
TO ORDER
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knobs B
Option A with Cover Cap C
Top Knob with Lock Nut D
Top Knob Only E
Lockwire Holes (with Option C) L
Seals
N Buna N (Std.)
V Fluorocarbon
P Polyurethane
Porting
0 Cartridge Only
4T SAE 4
6T SAE 6
2B 1/4 in. BSP*
3B 3/8 in. BSP*
4B 1/2 in. BSP*
*BSP Body;
U.K. Mfr. Only
NV08-23
5.050.2
Options
B, D or E
Option A
1.40
35.5
Options
C or L
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
