Valves - Flow Controls - Non-compensated - Needle Valve - Standard Adjustment

NV12-20

NEEDLE VALVE

Overview

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.
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) At shut-off
Temperature Ratings
Operating fluid temperature:
  • -40 to 100 °C (-40 to 212 °F) With buna N seals
  • -26 to 204 °C (-15 to 400 °F) With fluorocarbon seals
  • -54 to 107 °C (-65 to 225 °F) With polyurethane seals
  • -40 to 149 °C (-40 to 300 °F) With HNBR seals
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
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
Adjustment torque:
  • 0.3 to 0.6 N-m (3to 5 in-lb) At 241 bar (3500 psi)
Unit weight:
  • 0.23 kg (0.50 lb) Option A
Internal wetted surface area:
  • 94 cm² (14.6 in²)
NV12-20_Perf1(2022-02-24) NV12-20_Perf2(2022-02-24)
NV12-20_Dim2(2022-02-24)
Cavity:
  • VC12-2 or HNV12-2
Cartridge installation torque:
  • 122 to 136 N-m (90 to 100 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-2X-M-115 Buna N, Fluorocarbon, HNBR
  • SK12-2P-0 Polyurethane
NV12-20_Order2(2022-02-24)

Model Options

NV12-20F-H-J
F Adjustment Option
CODE
DESCRIPTION
A
1/4" Hex Allen Head
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
C
1/4" Hex Allen Head with Cover Cap
D
1-1/2" Diameter Aluminum Knob with Lock Nut
E
1-1/2" Diameter Aluminum Knob Only
L
1/4" Hex Allen Head with Cover Cap and Lockwire Holes
H Line Body
CODE
DESCRIPTION
0
No Body
10T
Aluminum SAE 10
12T
Aluminum SAE 12
16T
Aluminum SAE 16
12TD
Ductile Iron SAE 12
16TD
Ductile Iron SAE 16
8B
Aluminum BSPP 1" (8)
8BD
Ductile Iron BSPP 1" (8)
J Seal
CODE
DESCRIPTION
N
Buna-N
V
Fluorocarbon
P
Polyurethane
U
PPDI Urethane