Keystone K-LOK® Series 36/37 High Performance Butterfly Valves

Butterfly Valve,keystone K-LOK® Series 36/37 high performance butterfly valves are rated to ASME Class 150 and 300, available in wafer, lugged and flanged style. The unique design does not rely on pressure to assist sealing and therefore seals at high and low pressures, as well as dirty services.

FEATURES AND BENEFITS:
• K-LOK polymer and elastomer seats provide
bi-directional, drop-tight shut-off in vacuum
as well as at full rated differential pressure.
Its unique design does not rely on pressure to
assist sealing therefore seals at high and low
pressures, as well as dirty services. A variety
of materials allows optimum seat life in all
applications.
• Blow-out resistant shaft is standard on all
valves for increased safety.
• Unique packing design allows for use
in pressure as well as vacuum without
modification or special assembly.
• Disc taper pins are tangentially positioned
half in disc and half in shaft, placing them
in compression rather than shear, which
eliminates potential for failure.
• Rocker-shaped gland bridge compensates
for uneven adjustment of gland nuts reducing
packing leaks.
• Integrally cast disc position stop perfectly
locates the disc in seat, achieving maximum
seat and seal life.
• Extended neck allows for 50 mm (2") of
pipeline insulation.
• Integrally cast mounting pad provides direct
mounting of actuators eliminating the need
for costly brackets and couplings.
• Flattened body bore at shaft journal ports
positions shaft bearings near disc, providing
maximum shaft support resulting in reduced
wear and longer life.

GENERAL APPLICATIONS:
• Modulating service
• Airport refueling
• Hydrocarbon processing
• Chemical/petrochemical processing
• Purified gas
• Steam and vacuum services
• Power and utilities
• Refrigeration
• HVAC
• Alumina refining

TECHNICAL DATA:
Size range: DN 50 - 600 (NPS 2 - 24)
See note below for
DN 750 - 900 (NPS 30-36)
Vacuum rating: 1.016 x 10-3 mm (4 x 10-5 in) Hg
Body style: Wafer, lug and double
flanged
Pressure rating: Series 36 - ASME 150
Series 37 - ASME 300
Temperature
rating: -40°C to 538°C
(-40°F to 1000°F)
Metal seated, fire-safe and
DN 750-900 (NPS 30-36) valves are available.
For more information on these items see
Figures 360/362 data sheet (VCTDS-00032).
Lug and double flange bodies are full rated for
bidirectional dead end service.