FLOW CONTROLS
NV12-20 Needle Valve
DESCRIPTION
A screw-in, cartridge-style, variable orifi ce, hydraulic fl ow restrictor valve.
OPERATION
The NV12-20 increases its orifi ce value from fully closed to fully open with counter-
clockwise adjustment rotation.
FEATURES
• Adjustments cannot be backed out of the valve.
• Desired settings may be locked down.
• Hardened parts for long life.
• Cost effective cavity.
• Aluminum knob option.
• Positive shut-off.
• Linear adjustment.
RATINGS
Operating Pressure: 240 bar (3500 psi)
Flow: 113.6 lpm (30 gpm) nominal at 7 bar (100 psi) at full open 4.5 turns
Internal Leakage: 0.15 cc/minute (3 drops/minute) max. at shut-off
Adjustment Torque Required: 0.17 Nm (1.5 lb.-in.) at 7 bar (100 psi);
16.9 Nm (150 lb.-in.) at 207 bar (3000 psi)
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: VC12-2; See page 9.112.1
Cavity Tool: CT12-2XX; See page 8.600.1
Seal Kit: SK12-2X-M; See page 8.650.1
USASI/ISO:
5.014.1
PERFORMANCE (Cartridge Only)
Fully
Open
1/4
1/2 1
2
16.6/240
12.4/180
8.3/120
4.1/60
FLOW lpm/gpm
PRESSURE DROP bar/psi
20.7/300
15.1
4
90.8
24
128.7
34
TURNS
3
4
5
53.0
14
ΔP = 6.9 bar/100 psi —
ΔP = 5.5 bar/80 psi - - -
128.7/34
90.8/24
53.0/14
15.1/4
25
TURNS
FLOW lpm/gpm
1346
HYDRAFORCE
.com
®
SYMBOLS
Blue rectangles are links to other catalog pages.
Cartridge: Weight: 0.20 kg. (0.45 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:
0.57 kg. (1.25 lbs.) Anodized high-
strength 6061 T6 aluminum alloy,
rated to 207 bar (3000 psi). Ductile
iron bodies available; dimensions
may differ. See page 8.012.1
MATERIALS TO ORDER
NV12-20__ - __ __ __ - __
Adjustment Option
1/4 in. Hex Allen Head A
1-1/2 in. Dia. Alum. Knob B
Option A with Cover Cap C
Top Knob with Lock Nut D
Top Knob Only E
Seals
N Buna N (Std.)
V Fluorocarbon
Porting
0 Cartridge Only
10T SAE 10
12T SAE 12
16T SAE 16
4B 1/2 in. BSP*
6B 3/4 in. BSP*
8B 1 in. BSP*
*BSP Body;
U.K. Mfr. Only
NV12-20
5.014.2
DIMENSIONS
®
HYDRAFORCE
HYDRAFORCE
.com
®
Blue rectangles are links to other catalog pages.
