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

NV08-20

NEEDLE VALVE

Overview

Description

A screw-in, cartridge style, variable orifice, hydraulic flow restrictor valve

Operation

The NV08-20 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.
  • Compact size.

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:
  • 0.32 ml/min (5 drops/min) At shut-off
Temperature Ratings
Operating fluid temperature:
  • -40 to 120 °C (-40 to 250 °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
Storage temperature:
  • -40 to 70 °C (-40 to 160 °F)
Ambient temperature:
  • -40 to 70 °C (-40 to 160 °F)
Other Ratings
Corrosion protection:
  • 960 hr salt spray per ASTM b117 (model number gnv08-20xx)

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:
  • 0.6 N-m (5 in-lb) At 7 bar (100 psi)
  • 5.4 N-m (48 in-lb) At 207 bar (3000 psi)
Unit weight:
  • 0.12 kg (0.26 lb) Option A
Internal wetted surface area:
  • 60.4 cm² (9.36 in²)

Performance

NV08-20_Flow-Pressure

Dimensions

NV08-20_Dim

Materials

Materials

:

Cartridge: Weight: 0.10 kg. (0.23 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.

Installation Specifications

Cavity:
Cartridge installation torque:
  • 27 N-m (20 ft-lb)
Maximum allowable torque:
  • 47.5 N-m (35 ft-lb)
Orientation restriction:
  • None

Accessories

Seal kit:
  • SK08-2X-M X = seal option

Order Code

POSITION
CODE
DESCRIPTION
NV08-20FG-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
G
Screen
G
BLANK
NONE
G
S
100 Mesh Screen
H
Line Body
H
0
No Body
H
4T
Aluminum SAE 4
H
6T
Aluminum SAE 6
H
8T
Aluminum SAE 8
H
6TD
Ductile Iron SAE 6
H
8TD
Ductile Iron SAE 8
H
2B
Aluminum BSPP 1/4" (2)
H
3B
Aluminum BSPP 3/8" (3)
H
3BD
Ductile Iron BSPP 3/8" (3)
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
P
Polyurethane
J
U
PPDI Urethane
NV08-20_Order