311N Series Butterfly Valves

The 311N Series Butterfly valves are ideal for use as throttling valves. With the 10-position index plate, it is easy to repeat consistent flow conditions. Compact in design, this valve is used when space is at a premium.

  • PVC body
  • EPDM liner & O-rings
  • 316 Stainless steel index plate & hardware
  • Rugged, corrosion-resistant coated metal handle
  • 100% bubble-tight seal
  • Integral boot seal (flange gaskets not required)
  • Bolt sets include bolts, washers & nuts sized to accomodate butterfly valve & 2 PVC flanges
  • PVC disc with optimized strength/Cv performance
  • Pressure rating: 150 psi @ 70°F
  • Maximum temperature: 140°F
Stock Description Catalog Pg. Price
3" PVC Butterfly Valve
20638
$276.19/Each
Save 5%2+$262.38/Each
Save 10%4+$248.57/Each
Save 15%12+$234.76/Each
P-461
$276.19/Each
4" PVC Butterfly Valve
20639
$324.09/Each
Save 5%2+$307.89/Each
Save 10%4+$291.68/Each
Save 15%12+$275.48/Each
P-461
$324.09/Each
6" PVC Butterfly Valve
20640
$490.35/Each
Save 5%2+$465.83/Each
Save 10%4+$441.32/Each
Save 15%12+$416.80/Each
P-461
$490.35/Each