VB precision barstock valves

VB precision barstock valves ENLARGE
Product Summary
Barstock Metering Valves MFV™

Design Features
  • virtually free of hysteresis ("see-sawing")
  • bubble tight shutoff
  • straight (180°) or 90° flow patterns
  • available in brass or 316 stainless steel
  • sixteen turns to full open
  • up to 21.5 SLPM (air) or 650 mLPM (water)



VB precision barstock valves

Designed for controlling very low flowrates of liquids and gases, MFV™ Barstock valves are available in six conveniently overlapping orifice-needle sizes. Offered in straight (T) and 90 degree (L) flow patterns, the MFV™ Barstock Valve includes a “non-rising stem” design, it’s unique non-rotating needle is cylindrical with a precision ground tapered metering surface. The needle moves in a rectilinear fashion which accounts for its desirable sixteen- turn high resolution attribute. Hysteresis is virtually eliminated due to the needle design and the closely fitting fine thread on its adjustment plunger. The valve body is precision machined chrome plated brass or type 316 stainless steel.

SPECIFICATIONS
VALVE STEM sixteen turns, non-rising type
MAXIMUM OPERATING PRESSURE 500 psig (3792 kPa)
MAXIMUM OPERATING TEMPERATURE 180°F (82°C) - brass valves; 250°F (121°C) - 316 stainless steel valves
MATERIALS OF CONSTRUCTION
BODY chrome plated brass or 316 stainless steel
VALVE NEEDLE 316 stainless steel
ORIFICE 316 stainless steel with PTFE liner
O-RINGS PTFE and Buna-N standard with brass valves; PTFE and Viton® standard with 316 stainless steel valves; optional Viton®, PTFE/Kalrez®, EPR
CONNECTIONS 1/8 inch female NPT
VITON® and KALREZ® are registered trademarks of DuPont Dow Elastomers