Flow Control Valves

NV12-20 — Needle Valve
  Selection guide - similar valves.
  PDF file of this page.
  STP file for NV12-20.
  Request a quote.

NV12-20 Valve

SYMBOL:

NV12-20 Valve symbol

 

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

OPERATION
The NV12-20 increases its orifice value from fully-closed to fully-open with
counterclockwise 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
Operating Pressure: 240 bar (3500 psi)
Proof Pressure: 345 bar (5000 psi)
Burst Pressure: 896 bar (13000 psi)
Flow: 113.6 lpm (30 gpm) nominal at 7 bar (100 psi) at full open 4.5 turns
Internal Leakage: 0.15 cc/minute (3 drops/minute) max. at shut-off
Adjustment Torque Required: 0.17 Nm (1.5 inch-pounds) at 7 bar (100 psi);
   16.9 Nm (150 inch-pounds) at 207 bar (3000 psi)
Temperature: -40° to 100°C (-40° to 212°F) with Buna seals;
   -26° to 204°C (-15° to 400°F) with Fluorocarbon seals
   -54 to 107°C (-40 to 149°F) with Polyurethane seals;
   -40 to 149°C (-40 to 300°F) with HNBR seals.
Filtration: See page 9.010.1
Fluids: Mineral-based or synthetics with lubricating properties at viscosities of
   7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1
Installation: No restrictions; See page 9.020.1
Cavity: VC12-2; See page 9.112.1_2w
Cavity Tool: CT12-2xx; See page 8.600.1
Seal Kit: SK12-2X-M-115; See page 8.650.1

 

 


PERFORMANCE:
NV12-20 Flow Pressure

 


NV12-20 Valve Performance Chart

DIMENSIONS:

NV12-20 Dimensions

 


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. See page 8.012.1_2w.

 

ORDERING CHART:

NV12-20 Ordering Chart

Selection guide - similar valves.
PDF file of this page. STP file for NV12-20 Request a quote.