FNW 6701 User Manual

Figure 6701

KNIFE GATE VALVES

STAINLESS WETTED PARTS UNIDIRECTIONAL

METAL SEATED KNIFE GATE VALVE

The  gure 6701 is a stainless steel wetted parts by carbon
steel and iron topworks. This con guration provides a more
economical knife gate solution without sacri cing the ruggedness
and corrosion resistance needed for harsh applications. It
is designed for the pulp and paper, chemical, mining, power,
petroleum, and food process industries, as well as municipal
water and waste treatment plants. It is ideal for handling dense
mixtures of stock and slurries with unidirectional shut-off. The
shearing action of the knife gate cuts through solids and cleans
the seat as it closes.

Features

• Unidirectional Shutoff

• Maximum Pressure: 150 PSI CWP (30” to 100 PSI CWP)

• Maximum Temperature: 446°F (230°C)

• Cast Stainless Steel Body and Packing Gland

• Zinc Plated Carbon Steel Hardware

• Machined Gland Pocket Area

• Bonnetless, Outside Screw & Yoke

• Rising Stem

• Smooth Flow, Non-Clogging Step Seat Design

• Cast Iron Hand Wheel

• Gear-Operator Standard on 30” Valve

• Available in sizes 3” to 30”

• Standard design accommodates locking device

Standards

• Design: MSS SP-81

• Flange Drilling: ANSI B16.5

(30” to MSS SP-44 Flanges)

• Seat/Shell Test: MSS SP-81

• Material: ASME B16.34

CALIFORNIA PROP 65 WARNING:

• This product contains lead or lead compounds known to
the State of California to cause cancer and birth defects
and other reproductive harm. Do not use in connection
with drinking water. Wash hands after handling.

Figure Number Matrix

FNW 6701 Seat Size

SEAT CODE

Stainless Steel = S

(Integral)

3 = M
4 = P
6 = U
8 = X

SIZE CODE

10 = 10
12 = 12
14 = 14
16 = 16

18 = 18
20 = 20
24 = 24
30 = 30

Cv & Weight

Size Cv Wt (Lbs)

3 565 20
4 1,040 31
6 2,440 51

8 4,460 75
10 6,250 128
12 9,400 163

Weights are for general reference only.

Size Cv Wt (Lbs)

14 12,500 243
16 16,500 309
18 21,400 386
20 27,000 463
24 39,700 540
30 60,000 992

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Hand wheel is heavy cast iron, with a rounded grip
and epoxy coated hand wheel.

Double set screws prevent threaded-on hand
wheel from backing off or coming loose.

Aluminum-Bronze thrust components for anti­galling operation.

Grease  tting for maintaining smooth drive sleeve
operation.

Carbon steel plate yoke arms provide economy
without sacri cing strength and are epoxy coated.

All nuts and bolts are carbon steel grade B7 or 2H.

FEATURES

Stem-to-gate clevis is deliberately loose to allow
play in gate to minimize binding.

Horizontal clevis bolts provide fl exibility of the gate
during travel.

Multiple layers of PTFE impregnated square braid
packing provides excellent gland sealing at full
valve pressure differential.

The single piece cast all stainless steel body is
rugged and compact. It offers better leak tightness
than fabricated or two-piece designs.

The gate is high-quality, ground- nished stainless
steel. A generous gate thickness, well supported
by the packing, resists distortion or defl ection and
is less likely to bend in severe conditions.

Gate wedges located in the body aid the  nal gate/
seat sealing with a non-sliding motion.

A stepped seating design keeps the upstream
area clear. There is no dead pocket space in the
bottom of the body where suspeded solids/media
can collect.