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manufactured in the usa

Nil-Cor® Double-Offset Disc Butterfly Valve, Wafer Style or Threaded Lug, Composite Butterfly Valve, Sizes: 3-12 (Series 300HD/310HD)

Nil-Cor® Double-Offset Disc Butterfly Valve (3”-12” Series 300HD/310HD) is a double-offset wafer style full-face body or threaded lug body, high performance composite butterfly valve for corrosive chemical service used in construction of pressurized piping systems.

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Product Features & Benefits

  • COMPOSITE ADVANTAGE: Nil-Cor® uses premium epoxy novolac vinyl ester resin and a special blend of fillers, reinforcement and curing agents to produce an inherently corrosion resistant valve. Without the need for expensive liners that eventually swell or permeate, Nil-Cor® butterfly valves deliver a long, maintenance-free service life.
  • DOUBLE-OFFSET DISC DESIGN: allows the disc to move off the seat with a “camming” action, reducing break-away torque and seat wear.
  • 360° UNINTERRUPTED DISC SEAL: eliminates the leak path at the shaft hubs found on PTFE and rubber-lined valves.
  • STAINLESS-STEEL SHAFT: the stainless-steel shaft encapsulated with graphite or fiberglass-reinforced vinyl ester resin eliminates corrosion and assures long trouble-free operation.
  • CHEMICAL RESISTANCE TO CORROSIVE SOLUTIONS: the novolac epoxy resin and graphic fiber combination valve provides outstanding resistance to solvents organic acids, caustics and salt solutions in higher temperature applications.
  • DURABLE AND LIGHT WEIGHT: Nil-Cor® butterfly valves weigh less than 1/3 that of similarly sized metal valves. This means reduced handling and shipping expenses and easier installation.
  • VALVE TYPES AVAILABLE:
    • 300 HD Series Full-Face (Graphite Reinforced Vinyl Ester)
    • 300 HD Series Lug (Graphite Reinforced Vinyl Ester)
    • 310 HD Full-Face (Fiberglass Reinforced Vinyl Ester)
    • 310 HD Lug (Fiberglass Reinforced Vinyl Ester)
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Technical Details

FULL-FACE BUTTERFLY VALVE: 3” – 12” Series 300HD/ LUG BUTTERFLY VALVE: 3” – 12” Series 300HD

Materials of Construction

  • Body: Graphite Fiber-Reinforced Vinyl Ester
  • Retainer Ring: Graphite Fiber-reinforced vinyl ester resin
  • Seat: Viton GF or PTFE
  • Disc: Vinyl ester resin reinforced with graphite fiber (3”-8”) or glass fiber (10”, 12”)
  • Shaft: 17-4 PH stainless steel encapsulated with graphite fiber-reinforced vinyl ester on all wetted surfaces
  • Shaft Retainer Pin: Graphite-filled PVDF
  • Packing Follower: Hastelloy-C
  • Packing Bolts: Hastelloy-C
  • Shaft Seals: PTFE-V-Ring Packing

FULL-FACE BUTTERFLY VALVE: 3” – 12” Series 310HD/ LUG BUTTERFLY VALVE: 3” – 12” Series 310HD

Materials of Construction

  • Body: Glass Fiber-reinforced vinyl ester resin
  • Retainer Ring: Glass Fiber-reinforced vinyl ester resin
  • Seat: Viton GF or PTFE
  • Disc: Vinyl ester resin reinforced with graphite fiber (3”-8”) or glass fiber (10”, 12”)
  • Shaft: 17-4 PH stainless steel encapsulated with graphite fiber-reinforced vinyl ester on all wetted surfaces
  • Shaft Retainer Pin: Graphite-filled PVDF
  • Packing Follower: Hastelloy-C
  • Packing Bolts: Hastelloy-C
  • Shaft Seals: PTFE-V-Ring Packing

Size Range

  • • 3” – 12” 

Flange Compatibility

  • ANSI CL150 AND CL125
  • DIN and JIS on application

Service Temperature

  • Continuous temperature service from 0° to 250° F. Short term exposures to 300° F are acceptable.  
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Pressure Rating

Body Type

  • Full faced Wafer
  • Threaded Lug

Applications

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