Keystone Figure 56 Resilient Seated Butterfly Valve

Valve for use in power generation plants, municipal water treatment and industrial applications.

Specifications:

Certifications:
PED

Application:
Water Treatment, Water distribution, Wastewater treatment, Wastewater collection, Air Circulation

Body Design:
Long Pattern, Short Pattern

Material:
Super Duplex, Aluminum Bronze, Epdm Rubber, Carbon Steel, Ductile Iron, Duplex, Buna-N, 316 Stainless Steel

Operating Temperature:
Up to 250 F (120 C)

Pressure Class:
PN

Process Connection Type:
PN16

Seat/Seal Type:
Resilient

Shutoff Class:
Zero Leakage

Valve Size:
NPS 36, NPS 30, NPS 20 / DN 500, NPS 24 / DN 600, NPS 40, NPS 42, NPS 56, NPS 60

Valve Size Standard:
DN

Valve Type:
Butterfly

Media:
Air, Water

Stem:
O-ring

FEATURES:
• Face to face is in compliance with EN558,
series 13 (short) and 14 (long) for sizes up to
and including DN 2000. Sizes DN 2100 and
above face to face is according to AWWA
C516.
• Replaceable actuator flange in accordance to
ISO 5211.
• Cast double flanged butterfly valve, which
can be drilled acc. various flange standards
(JIS, BS, ISO/EN, ASME and AWWA).
Dead-end service capability with down stream
piping removed.
• Body and disc protective coatings or rubber
linings are available for sea water or
corrosive services.
• Low headloss thru optimized disc design.
• The special seat and disc edge contours
reduce seating torque, provide better
shut-off and longer service life.
• The seat is adjustable in order to optimize
the required shut-off tightness with the
accompanying torque, for unidirectional or
bidirectional operation.
• Replaceable seat without special tooling,
dismantling or removing the valve from
the line.
• A stainless steel disc edge resists against
corrosion and avoids encrust build-up for
consistent sealing.
• Dry shaft design.
• High strength stub shafts have full 1½
diameter penetration into disc-hubs with
close tolerance-fit.
• Self lubricating sleeve bearings allow valve
installation with the shaft horizontal or vertical.
• All valves comply to
PED DIRECTIVE 2014/68/EU and CE marking.