FNW 62B User Manual

Figure 62B

KNIFE GATE VALVES

STAINLESS STEEL LINED

RESILIENT SEATED KNIFE GATE VALVE

The gure 62B is a lined valve with the economy of a ductile
iron body and the corrosion resistance of all stainless steel
wetted parts. The 62B is designed for pulp and paper,
chemicals, mining and petroleum industries to handle dense
mixtures of stock and slurries where positive shutoff is
required. The shearing action of the knife gate cuts through
solids and cleans the seat as it closes.

Features:

• Unidirectional Shutoff

• Stainless Steel Lined Ductile Iron Body

• Thrust Ball Bearing Yoke Bushing (18” & Larger)

• EPDM Seat (Viton® optional)

• Cast Iron Handwheel

• Bonnetless, Outside Screw & Yoke

• Rising Stem

• Corrosion Resistant Stainless Impregnated Coating

• Meets MSS SP-81 Specication for 150 PSI CWP

• Smooth Flow, Non-clogging Step Seat Design

• Available in sizes from 3” to 24”

Unidirectional

Resilient Seated

Standards:

• Design: MSS SP-81

• Flange Drilling: ANSI B16.5

• Seat/Shell Test: MSS SP-81

Stainless Steel Lined

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Options

FNW Valve Company offers many options and
modications for valves. These include, but are
not limited to:

• Actuation including ratchets, chain wheels,
AWWA nuts, gear-operators, pneumatic &
hydraulic cylinders, and electric actuators

• Packing options for pH and temperature
requirements

• Back seat stops for low ΔP or reverse operation
applications, or to prevent knife blade deection.

• V-ports for reduced plugging in metering
applications

• Stem extensions in carbon and stainless steel

• Conversion to non-rising stem (NRS)

• Deection cones in Ni-Hard and HDPE for added
seat and gate protection in abrasive services

• Flush ports to clear suspended matter from the
valve chest or seat pocket area

• Quick opening levers

• Gate scraper

• Viton® seat

Contact FNW for knife gate valve options.

Standard Materials

Ref.

No.

1 Body Ductile Iron 1

2 Knife A240 316 1

3 Yoke A216 WCB 1

4 Stem A276 410 1

5 Body Seat Ring A240 316 1 Welding

6 Packing PTFE Impregnated Fiber 1 Set Non-Asbestos

7 Packing Gland A216 WCB 1

8-1 Gland Bolt STEEL 1 Set

8-2 Gland Nut STEEL 1 Set Nylon Lock Nut

9-1 Yoke Bolt STEEL 4

9-2 Yoke Nut STEEL 4

10-1 Clevis Bolt A193 B8 2

10-2 Clevis Nut A194 8 2 Nylon Lock Nut

11 Yoke Sleeve BRASS 1

12 Thrust Washer BRASS 1

13 Hand Wheel A338 1

14 Name Plate ALUMINUM 1

15 Lock Washer A240 304 1

16 Wheel Nut BRASS, STEEL 1

17 Bottom Stopper A240 316 2 Welding

18 Rivet ALUMINUM 2

19 Grease Nipple ASS’Y 1

20 Bearing Housing A216 WCB 1

21 Thrust Ball Bearing ASS’Y 2 18” And Larger

22 Bearing Gland A216 WCB 1 Tack Weld

23-1 Bearing Housing Bolt STEEL 4

23-2 Bearing Housing Nut STEEL 4

24 Body Liner A240 316 1 Set Welding

25 Seat O-Ring EPDM 1

Description Material Qty Remarks

Packing Options

Type

PTFE Impregnated Fiber (Standard) 425ºF

Pure TFE 425ºF

TFE Fiber (Ultra) 500ºF

Graphite Filament Yarn 1000ºF

Temperature

Limit

Flow Coefcients, Port Areas, & Weights

Size Cv Port Area (in²) Wt. (Lbs)

3 190 4.37 24

4 340 7.79 35

6 890 20.58 57

8 1,710 39.46 86

10 2,670 61.62 128

12 3,990 92.07 169

14 5,070 117.03 223

16 6,660 153.42 295

18 8,240 189.81 363

20 10,460 240.96 557

24 15,400 354.81 671