Symbol
Description
A screw-in, cartridge style, variable orifice, hydraulic flow restrictor valve
Operation
The NV12-20 valve increases its orifice size 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.
Aluminum knob option.
Positive shut-off.
Linear adjustment.
Cost-effective cavity.
Overview
Ratings
Pressure Ratings
Pressure rating
241 bar (3500 psi)
Proof pressure
345 bar (5000 psi)
Burst pressure
896 bar (13000 psi)
Flow Ratings
Flow rating
See pressure drop vs. Flow chart
Maximum internal leakage
0.15 ml/min (3 drops/min) - Note: At shut-off
Temperature Ratings
Operating fluid temperature
-40 to 100 °C (-40 to 212 °F) - Note: With buna N seals
-26 to 204 °C (-15 to 400 °F) - Note: With fluorocarbon seals
-54 to 107 °C (-65 to 225 °F) - Note: With polyurethane seals
-40 to 149 °C (-40 to 300 °F) - Note: With HNBR seals
Storage temperature
-40 to 70 °C (-40 to 160 °F)
Ambient temperature
-40 to 70 °C (-40 to 160 °F)
Operating Parameters
Fluids
Mineral based or synthetic hydraulic fluid with lubricating properties
Fluid viscosity range
7.4 to 420 cSt
Maximum operating contamination level
18/16/13 per iso4406
Properties
Adjustment torque
0.2 N-m (1.5 in-lb) - Note: At 7 bar (100 psi)
16.9 N-m (150 in-lb) - Note: At 207 bar (3000 psi)
Unit weight
0.32 kg (0.70 lb) - Note: Option A
Internal wetted surface area
129 cm² (20 in²)
NV12-20
hydraforce.com
NEEDLE VALVE
hydraforce.com
12/15/2020
NV12-20
Performance
Dimensions
Materials
Materials
Cartridge: Weight: 0.32 kg (0.70 lb); 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 lb); Anodized high-strength 6061 T6 aluminum alloy, rated to 207 bar (3000 psi); Ductile
iron bodies available; dimensions may differ.
Installation Specifications
Cavity
VC12-2
Cartridge installation torque
45 to 50 N-m (33 to 37 ft-lb)
Maximum allowable torque
102 N-m (75 ft-lb)
Orientation restriction
None
Accessories
Seal kit
SK12-2X-M-115 - Note: X = seal option
Housings
NV12-20
hydraforce.com
NEEDLE VALVE
hydraforce.com
12/15/2020
NV12-20
Order Code
POSITION CODE DESCRIPTION
NV12-20F-H-J
F Adjustment Option
F A 1/4" Hex Allen Head
F B 1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
F C 1/4" Hex Allen Head with Cover Cap
F D 1-1/2" Diameter Aluminum Knob with Lock Nut
F E 1-1/2" Diameter Aluminum Knob Only
F L 1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H Line Body
H 0 No Body
H 10T Aluminum SAE 10
H 12T Aluminum SAE 12
H 16T Aluminum SAE 16
H 12TD Ductile Iron SAE 12
H 16TD Ductile Iron SAE 16
H 8B Aluminum BSPP 1" (8)
H 8BD Ductile Iron BSPP 1" (8)
J Seal
J N Buna-N
J V Fluorocarbon
J P Polyurethane
J U PPDI Urethane
NV12-20
hydraforce.com
NEEDLE VALVE
hydraforce.com
12/15/2020
NV12-20
