FNW 61B 4" Full 316 Stainless Steel Knife Gate Valve
This FNW Model 61B is a high-performance 4-inch knife gate valve constructed with a full 316 Stainless Steel body and gate. Designed for unidirectional shutoff, it features a Rising Stem (OS&Y) design that allows operators to visually verify the valve's position at a glance. The shearing action of the 316SS blade is specifically engineered to cut through thick slurries and solids that would jam a standard wedge gate valve.
Technical Specifications
| Body & Gate Material | 316 Stainless Steel (ASTM CF8M/A240) |
| Stem Type | Rising Stem (Outside Screw & Yoke) |
| Pressure Rating | 150 PSI CWP (Cold Working Pressure) |
| Steam Rating (WSP) | Not Recommended for Steam Service |
| Connection | 4" Flanged / Lugged (ANSI 150#) |
| Standard Packing | PTFE Impregnated Fiber |
Media Suitability & Purchasing Perspective
- Suitable Media: Heavy slurries, paper stock (pulp), chemical processing fluids, abrasive mining discharge, and wastewater treatment.
- Purchasing Perspective: For the repairman or engineer, this full 316SS construction offers superior longevity in acidic or corrosive environments where ductile iron valves typically corrode. The rising stem design ensures that the threaded portion of the stem remains outside the flow media, protecting it from wear and buildup.
- Value-Add: This valve features a non-clogging step seat design, preventing the accumulation of solids in the valve chest and ensuring a reliable seal even in high-solids applications.
Condition Note: This item is in new, unused condition. It does not come in the original factory packaging. It may have minor cosmetic scuffs and scratches from warehouse storage and handling. These are strictly aesthetic and do not affect the mechanical integrity or performance of the item. You are purchasing the exact item shown in the photos.
ℹ️ View Fitment Advisory & Return Policy
Fitment: The buyer is responsible for verifying the ANSI B16.5 flange bolt pattern and ensuring the valve's unidirectional flow arrow matches the system requirements.
Returns: 30-day window. Item must be uninstalled. The buyer is responsible for return shipping costs. Valves that have been exposed to process media or show mounting marks are not eligible for return.
Acknowledgement: By purchasing this item, the buyer acknowledges and agrees to the Cox Industrial Supplies LLC Return Policy.
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