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Keystone K-LOK Series 38 High Performance Butterfly Valve

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Bernhard Witzelsteiner
Account Manager
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Solution Seller
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Anders Praem
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Slawka Pedersen
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Henna Ketoja
Inside Sales Engineer
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Tommi Penttilä
Sales Manager Conventional Power
Phone. +358 207 416 208
Mob. +358 40 512 2308

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Emerson‘s Keystone K-LOK Series 38 is a high performance butterfly valve engineered to NAMUR Recommendation NE 167. The valve is rated PN10, 16 & 25 and available in wafer and lugged 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.

CHEMICAL & PETROCHEMICAL Keystone SLURRY WATER & SEVAGE

Specifications
Functions

Size	DN 50 - 400
Operating Temperature	-29°C to 200°C
Pressure Class	PN 10, 16, 25
Applications	Chemical and petrochemical processing, purified gas, steam, vacuum, water and utilities
Certifications	ISO 15848-1, PED-CE, UKCA, SIL
Design Standard	EN 12569, EN 593, EN 16668, NE 167
Face to Face	EN 558
End Connection	Lug and wafer

Interference polymer seat design provides 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 media containing particulate.
Integrally cast-in disc position stop perfectly locates the disc in the seat, achieving maximum seat and seal life, reducing total cost of ownership.
Clamping sleeve enhances vertical alignment of the disc and shaft while in service including during thermal cycles, resulting in reduced wear of the seat and further extension of the seat and seal life.
All valves have been certified for low emissions to the latest edition of ISO 15848-1 tightness class BH endurance class C03.
Unique packing design allows for use in pressure as well as vacuum without modification or special assembly.
Unique gland bridge design compensates for uneven adjustment of gland nuts, reducing packing leaks and maintenance costs.
Blow-out resistant shaft is standard on all valves for increased operator safety.
Disc taper pins are tangentially positioned placing them in compression rather than shear stress, which eliminates potential for failure and increases safety.
Extended neck allows for up to 100 mm of pipeline insulation, allowing access to packing gland, for size DN 100 and above. For size less than DN 100, insulation height is equal to DN number in valve (e.g., 80 mm for DN 80).

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Keystone K-LOK Series 38 High Performance Butterfly Valve

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