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

Specs

Material
316 Stainless Steel, 316L Stainless Steel, Carbon Steel, Duplex, Stainless Steel, Super Duplex
Pressure Class
ASME
Pressure Rating
ASME Class 150 - 300
Process Connection Type
150RF, 300RF
Seat/Seal Type
High performance
Shutoff Class
Zero Leakage
Size Range
NPS 2 - 36 (DN 50 - 900)
Standards
API 609, ASME B16.34
Temperature Rating
-40°F to 1000°F (-40°C to 538°C)
Valve Size
PS 10 / DN 250, NPS 12 / DN 300, NPS 14 / DN 350, NPS 16 / DN 400, NPS 18 / DN 450, NPS 2 / DN 50, NPS 20 / DN 500, NPS 2-1/2 / DN 65, NPS 24 / DN 600, NPS 3 / DN 80, NPS 4 / DN 100, NPS 6 / DN 150
Valve Size Standard
NPS
Valve Type
Butterfly, High performance Butterfly Valve

Features

  • 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.