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Forged Needle Valve



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1/8" - 3/8" NPT
1/8" and 1/4" Dual Ferrule Tube
Vacuum - 5000 Psig (345 Bar)

Description

Series FNV Needle Valves feature a forged body, integral bonnet design with PTFE and metallic wafer stem packing. This provides leak-tite service from vacuum to the maximum operating pressure. Series FNV are available in Straight and Angle configurations, with NPT and Dual Ferrule Tube connections. The industry standard panel mounting allows the FNV to be a cost effective solution to many applications. Standard metal to metal stem and optional Soft Tip stem provide accurate metering over a wide range of pressures. The Series FNV can be ordered cleaned for Oxygen Service.

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Features

  • Metallic and PTFE Wafer Stem Packing provides low operating torque
  • Panel Mounting Standard
  • Metal to Metal Standard, Optional Soft Stem Tip (PCTFE)
  • Straight or Angle Body Configurations
  • Male and Female NPT or Dual Ferrule Tube Connections
  • Suitable For Cryogenic Service
  • 100% Factory Tested

Technical Data

  • Maximum Operating Pressure @ 100º F
    • Brass: 3000 Psig (207 Bar)
    • Stainless: 5000 Psig (345 Bar)

Temperature / Pressure Ratings

Temperature, °F (°C) Max. Working Pressure, Psig (Bar)
Brass 316 SS
- 320 (-195) to 100 (37) 3000 (207) 5000 (345)
100 (37) to 250 (93) 2200 (151) 4085 (281)
250 (93) to 350 (176) 1470 (101) 3715 (255)
350 (176) to 400 (204) - 3435 (236)
  • Temperature Range:
    • Metal to Metal Stem: -320° to 400° F (-195°C to 204°C)
    • PCTFE Soft Stem Tip: -20° to 200°F (-29° to 93°C)
  • Orifice: 0.17" (4.32 mm)
  • Flow Coefficient (Cv): 0.37

Testing

Every valve is factory tested with Nitrogen at 3000 Psig (207 Bar) for leakage. Maximum allowable seat leakage is 0.1cc/min.

Materials of Constructions

Component Brass Stainless
Valve Body Brass, ASTM 377 316 SS, ASTM A182
Packing Nut Brass, ASTM B16 316 SS, ASTM A479
Regulating Stem 316 SS, ASTM A479
Packing Washers Brass, ASTM B36 316 SS, ASTM A479
Packing PTFE, ASTM D1710
Soft Stem Tip PCTFE (Neoflon® M400), ASTM D1430
Panel Nut Brass, ASTM B16 303 SS, ASTM A582
Round Handle Nylon 6/6 (Zytel®) with Brass Insert
"T" Handle 303 SS, ASTM A582
Handle Set Screw 304 SS, ASTM A182
Lubricant Oxygen Compatible Perfluoropolyether (PFPE) Grease

Dimensionsional Data



Flow Coefficient (Cv) @ Turns Open

Ordering Information

PROPER COMPONENT SELECTION - When specifying a component, the total system design must be considered to ensure safe and trouble-free performance. Intended component function, materials compatibility, pressure ratings, installation, environment and maintenance are the responsibility of the system designer.