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manufactured in the usa

Nil-Cor® Fiber-Composite Ball Valves, Flanged Ball Valves, Vinyl Ester Resin, Glass Fiber, (310 Series)

Nil-Cor® Fiber-Composite Flanged Ball Valve, Vinyl Ester Resin, Glass Fiber (310 Series) features a one-piece body, eliminating the leak path inherent in a body joint. These ball valves are used for corrosive chemical service used in construction of pressurized piping systems.

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Product Features & Benefits

  • ONE-PIECE BODY: The one-piece body eliminates the leak path inherent in a body joint.
  • CORROSION RESISTANT: The mixture of high strength, specially formulated, compression molded glass fiber and vinyl ester thermoset resin offers outstanding chemical resistance, inside and out zero corrosion rate, and excellent retention of properties at high temperatures.
  • STRONG, DURABLE AND LIGHT WEIGHT: Excellent alternative to high alloy valves. Nil-Cor ball valves are 50% - 80% lower cost and 1/3 the weight. Saves money on piping supports and makes Nil-Cor ball valves ideal for use on plastic and FRP flanged piping systems.
  • BROAD CHEMICAL RESISTANCE RANGE: The vinyl ester resin, glass fiber composite valve is the most popular resin system, offering chemical resistance to a wide range of chemicals including HCL, brine, sea water and corrosive environments.
  • SAFE AND RELIABLE: All Nil-Cor ball valves feature lightweight, corrosion resistant bodies and a lock-out as standard equipment.
  • UNIQUE COLOR CODING: All valves have unique color coding for easy field identification.
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Technical Details

Materials of Construction

  • Body: Compression molded fiberglass and epoxy novolac vinyl ester resin.
  • Gland: Hastelloy®-C with integral locking plate.
  • Stem: Hastelloy®-C metal insert with molded graphite fiber/vinyl ester composite on all wetted surfaces. 10” stem Solid Hastelloy®-C. Consult Factory for options.
  • Gland Bolts: Hastelloy®-C.
  • Stem Packing: PTFE V-Rings.
  • Thrust Washer: Glass and carbon-filled PTFE.
  • Insert: Compression molded fiberglass and epoxy novolac vinyl ester resin.
  • Seals: PTFE-coated FKM elastomer O-ring.
  • Ball: Compression molded graphite fibers and epoxy novolac vinyl ester resin.
  • Seats: Self-Relieving Virgin PTFE. Glass-filled and Cavity-Filler seats available.
  • Operators: Composite lever (1”-4”). Stainless Steel handle adapter (5”-8”). All handles have locking provision. Gear is standard on 10” and recommended on 6”& 8”.  

Size Range

  • Available in sizes 1” TO 10” (ANSI B16.5 Class 150 Flange Drilling; DIN10 PN10, PN16 and JIS 10K)
  • Valve face to face dimensions meet ANSI B16.10

Service Temperature

  • (-)50°F to 300°F
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Pressure Rating

  • to pressures of 275 PSIG


  • Oil Refinery
  • Power Industry
  • Paper and Pulp
  • Chemical
  • Mining
  • Water and Wastewater
  • Hydrogen
  • Natural Gas Distribution
  • Lithium
  • Steel Processing
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View Our Chemical Resistance Guide

This resource is intended as a guideline to be used with all available information to determine suitability of material selection. We suggest thorough research which should include known applications when determining material. The information contained herein is provided only as a guide for the use of ANDRONACO INDUSTRIES products.

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