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Knife Gate Valves • Resilient Seated

Figure 6800 - Stainless Steel Bidirectional Resilient Seated Knife Gate Valve
FNW Figure 6800, Stainless Steel Bidirectional Resilient Seated Knife Gate Valve

Figure 6800
Catalog Spec Sheet Spec Sheet for Figure 6800 MasterSpec log
Tech Guide
Drawings for Figure 6800 — Bi-directional Knife Gate Valve
 
PDF drawing DWG drawing -- AutoCAD required to open  *AutoCAD required to open DWG (free download)

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The figure 6800 knife gate valve has an all cast stainless steel body and yoke with investment cast packing follower. It is a general purpose zero-leak bidirectional shutoff valve. Perimeter gate sealing is not pressure dependent, so there is no minimum differential needed for shutoff. Port sizing is similar to schedule 40 pipe, so the valve offers unrestricted flow and minimal pressure drop.
 
 Features:

  • Bidirectional Bubble-Tight Shutoff
  • Maximum Pressure: 150 PSI CWP (30" is 50 PSI CWP)
  • Maximum Temperature: 176?F (80?C)
  • Non-Differential Pressure Dependent Shutoff
  • Cast Stainless Steel Body, Yoke, & Packing Gland
  • Thrust Needle Bearing
  • Combination Chest Liner & Anti-Extrusion Strip (Anti-Extrusion Strip Only on 14" and Larger Valves)
  • Wire Reinforced & Retained Resilient Seat
  • Stainless Steel Position Indication Arrow
  • Stainless Steel Hardware
  • Machined Gland Pocket Area
  • Bonnetless, Outside Screw & Yoke
  • Rising Stem
  • Cast Iron Hand Wheel
  • Gear-Operator Standard on 30" Valve
  • Available in sizes 3" to 30"
  • Standard design accommodates locking device
 Standards:

  • Face-to-Face: MSS SP-81
  • Flange Drilling: ANSI B16.5 (30" to MSS SP-44 Flanges)
  • Testing:
    • Shell (Before Assembly): 1.5 Time Max. CWP (No Leak)
    • Seat: 1.1 Times Max. CWP (No Leak)
  • Material: ASME B16.34
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