Keystone Figures 990 and 920 Thin Disc Resilient Seated Butterfly Valve0 pages

VALVES & CONTROLS

KEYSTONE BUTTERFLY VALVES – RESILIENT SEATED
FIGURES 990 AND 920, 1" TO 20", TO 150 PSI

FEATURES

FLANGE STANDARD

• One-piece, thin profile, 316 Stainless
steel disc/stem provides minimum
obstruction to flow, resulting in highest
Cv, lowest pressure drops and best
control characteristics. Also available
with PTFE, NBR or EPDM molded disc.

Figure 990 is a resilient-seated,
wafer-style, butterfly valve suitable
for installation between ANSI Class
125/150 flanges.

• Triple function, resilient dovetail seat
isolates body and stem from line
media, provides drop-tight shut-off of
line media at full-rated pressure and
permits convenient and economical
replacement in the field.

Figure 920 provides drilled and tapped
lugs around the valve body, compatible
with ANSI Class 125/150 flange
standards.

• Heavy duty, corrosion resistant top
bushing provides upper stem support,
absorbs actuator sideloading and
extends valve cycle life.
• Bi-directional, self-adjusting double
V-cup stem seals prevent external
contaminants from entering the valve.
• Split body design enables easy field
replacement of seat and disc/stem and
permits direct mounting of Keystone
actuators without the use of couplings
or brackets.

GENERAL APPLICATION

TECHNICAL DATA

Figure 990 (wafer) and Figure 920 (lug)
are used when sanitary service or
corrosion resistance is required. Heavy
duty applications include food and
beverage, pharmaceutical, pulp and
paper, mining and power industries.
Available with PTFE lining for light
corrosive services and rubber lining
for light abrasive services.

Sizes:
Figure 990 (wafer style) 1" to 20"
Figure 920 (lug style) 2" to 20"
Pressure ratings:
1" to 12" – 150 psi
14" to 20" – 75 psi
• PTFE or elastomer mold disc
2" to 12" – 100 psi
14" to 20" – 75 psi
• White NBR seats
2" to 20" – 50 psi

KEYMC-0027-US-1403

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