FNW 762, 761 User Manual

Figure 761 & 762

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BUTTERFLY VALVES

SPLIT BODY PTFE SEATED

BUTTERFLY VALVE

he fi gure 761/762 series valve is a

split bod

esigned for bubble tight service on

orrosive applications. The PTFE

ined seat and stainless steel disc/stem

rovide superior corrosion resistance, but

ith the economy of a cast iron body.

Features:

boot seated butterfl y valve

ated to 150 PSI
esigned for 125/150 Lbs Flange

ocating Flange Holes on All Wafer

Models

plit Body for Easy Maintenance

eavy-duty Square Groove Boot Seat
ockable Lever Handle
ug Bodies for Dead-End Service

ated to 75 PSI Without Downstream
lange
acuum Rated to 29.92”H

0.00075 Torr
hell Tested to 150% & Seat Tested to

10% of Maximum Working Pressure
wo Layer Epoxy/Polyurethane Body

oatin

ow Maintenance Desi

izes 2” to 12”

. 761

Fig. 762

Fig. 761

Standards:

esign: API 609
lange Connection: ANSI B16.5
esting: API 598

Mounting Pad: ISO 521

Dead-end service with downstream fl ange is rated to the valve’s full 150 PSI capacity.

Leakage rate not exceeding 1x10 cc/sec. Vacuum measurements are often made in inches of mercury

elow atmospheric pressure. The values calculated here assume standard atmospheric pressure of 29.92

nches of mercury.

www.fnw.com

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Design Features:

w

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stem

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ISO 5211 actuator mounting pad

ith square stem for direct mounted

actuatio

eavy-duty polyacetal bushing

absorbs side load

ressure on the stem/disc

idirectional “U” cup stem seal
xtended neck accommodates 2”

iping insulatio

Wafer valves include two fl ange

ocating holes meeting ANSI B16.5 for

25/150 lbs fl anged for easy alignment
uring installatio

Precision machined wide radius on
upper and lower disc hubs provide a
superior primar
and

ingle-piece stainless steel disc and
stem provides corrosion resistance,
stren

th, and a thin profi le to fl ow

orces created by

seal between disc

eavy-duty cast iron split body for
ea

ier maintenance

isc edge and hubs are hand polished

or improved seal abilit

PTFE seat with EPDM backing

rovides corrosion resistance and seat

esilienc

resilient fl ange face acts as fl ange
asket for installatio

eady-duty square groove locks boot
seat in place

wo layer coating starting with Epoxy
inc Phosphate Primer followed by a

Pol

urethane top coat

Options:

NW offers many options and

modi

cations for valves. These include,
ut are not limited to: Actuation includin
hain wheels, square drive nuts, worm
ear operators, pneumatic and electric
perators, control accessories, stem

extensions, and custom mountin

ardware. Contact FNW with your

speci

c application needs.

ef.

o

ody Locating Pin

4

Standard Materials

Descriptio

pper Bod
ower Bod

tem Seal NITRILE

tem Bushin

isc / Ste

eat PTFE LINED EPD

top Plate

ever

ody Screw

ever Bolt

ear Operator

andwheel

ear Mtg Bolt

ASTM A126 Gr. B CAST IR
ASTM A126 Gr. B CAST IR

ASTM A351 CF8M /

ARBON STEEL ZINC PLATED

Material

POLYACETAL

TAINLESS STEEL

ARBON STEEL En

ARBON STEEL

4SS STAINLESS STEEL

ARBON STEEL

AST IR
ARBON STEEL
ARBON STEEL

t

H

Remark

inc Plated, Not Show
inc Plate
"~6", Powder Coated

inc Plate
"~12
"~12", Fabricated
"~12", Zinc Plated