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

HNV12-20

NEEDLE VALVE

Overview

Description

HNV12-20 is a screw-in, cartridge style, variable orifice, hydraulic flow restrictor valve

Operation

The valve increases its orifice size from fully closed to fully open with counter-clockwise adjustment rotation

Features

  • Rated for high pressure operation.
  • Compact size.
  • Can be used with HyPerformance™ ductile iron body or standard ductile iron body.
  • Adjustments cannot be backed out of the valve.
  • Desired settings may be locked down.
  • Hardened parts for long life.
  • Variety of adjustment options available.
  • Positive shut-off.
  • Linear adjustment.
Pressure Ratings
Pressure rating:
  • 350 bar (5075 psi)
Proof pressure:
  • 689 bar (10000 psi)
Burst pressure:
  • 1379 bar (20000 psi)
Flow Ratings
Flow rating:
  • See pressure drop vs. Flow chart
Maximum internal leakage:
  • 0.15 ml/min (3 drops/min) Max 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 urethane 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
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 (3 to 5 in-lb) At 345 bar (5000 psi)
Unit weight:
  • 0.32 kg (0.50 lb) Option A
Internal wetted surface area:
  • 94.2 cm² (14.6 in²)
HNV12-20_Flow-Pressure_Flow-Turns
HNV12-20_Dim

Materials

Cartridge: Weight (with Adjustment Option A: 0.32 kg (0.50 lb) Steel with hardened work surfaces. Zinc-plated exposed surfaces. Urethane seals standard. Anodized aluminum knobs.

Standard Ported Body: H-series ductile iron, or standard ductile iron, rated to 345 bar (5000 psi); anodized high-strength aluminum alloy, rated to 207 bar (3000 psi) also available; available; dimensions may differ.

Cavity:
  • VC12-2
  • Hvc12-2
Cartridge installation torque:
  • 156 to 170 N-m (115 to 125 ft-lb)
Orientation restriction:
  • None
Seal kit:
  • SK12-2N-M-115 Buna N
  • SK12-2V-M-115 Fluorocarbon
  • SK12-2U-0 Urethane
HNV12-20_Order
POSITION
CODE
DESCRIPTION
HNV12-20F-H-J
F
Adjustment Option
F
A
5/32" Hex Allen Head
F
B
1-1/2" Diameter Aluminum Knob with Aluminum Lock Knob
F
C
5/32" 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
H
Line Body
H
0
No Body
H
12HT
Ductile Iron SAE 12
J
Seal
J
N
Buna-N
J
V
Fluorocarbon
J
U
PPDI Urethane