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.

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) 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)

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) At 7 bar (100 psi)
16.9 N-m (150 in-lb) At 207 bar (3000 psi)
Unit weight
0.32 kg (0.70 lb) Option A
Internal wetted surface area
129 cm² (20 in²)

Performance

NV12-20_Flow-Pressure NV12-20_Flow-Turns

Dimensions

NV12-20_Dim

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 X = seal option

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_Order