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Nil-Cor® Double-Offset Disc Composite Butterfly Valve, Sizes (Series 310HD) Fiberglass Reinforced Vinyl Ester
Nil-Cor® Double-Offset Disc Butterfly Valve, Sizes 14”-48” (Series 310HD) Fiberglass Reinforced Vinyl Ester, is a double-offset wafer style high performance composite butterfly valve with corrosive chemical service used in construction of pressurized piping systems.
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.
Technical Details
Materials of Construction
- Gland Nut, Top 304 Stainless Steel
- Gland Stud, Top 304 Stainless Steel
- Gland, Top 316 Stainless Steel
- Shaft 17-4PH SS/Vinyl Ester
- Packing, Top Virgin PTFE V-Rings
- Valve Body Fiberglass reinforced Vinyl Ester
- Disc Spacer (2) Glass-reinforced PTFE
- Disc Fiberglass reinforced Vinyl Ester
- Seat Ring Viton GF or PTFE Envelope
- Packing, Bottom Virgin PTFE V-Rings
- Gland, Bottom 316 Stainless Steel
- Gland Stud, Bottom 304 Stainless Steel
- Gland Nut, Bottom 304 Stainless Steel
- Nuts, Bottom Shield 18-8 Stainless Steel
- Lock Washers 18-8 Stainless Steel
- Hex Head Cap Screws 18-8 Stainless Steel
- Bottom Shield Epoxy-coated Carbon Steel
Size Range
- 14” – 48”
Flange Compatibility
- ANSI CL150 AND CL125
- DIN and JIS on application
Service Temperature
- Continuous temperature service from -50 to 250° F. Short-term exposures to 300° F are acceptable.
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
Literature
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