CLARKSON MODEL KGD SLURRY KNIFE GATE VALVES
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EMERSON. CLARKSON MODEL KGD SLURRY KNIFE GATE VALVESThe Clarkson KGD wafer style slurry knife gate valve offers the latest in elastomer technology with the Mark III sleeve design FEATURES • 100% isolation, bubble-tight shut-off results in absolutely zero downstream leakage. • Double-seated design provides bi-directional flow and shut-off. • Unobstructed flow eliminates turbulence, minimizes pressure drop across valve. • No seat cavity where solids can collect and prevent full gate closure. • Dynamic self-adjusting secondary seal. • No gate or stem packing is required, eliminating packing leakage and maintenance. • Long lasting lubrication. • No metal parts in contact with the flowing slurry. • Adaptable frame (yoke) design featuring a top-removal stem nut, can be field modified to an air cylinder or bevel gear in the field without welding. • Open-Closed lockout brackets standard through NPS 16 (DN 400), ready for optional factory supplied or customer supplied lockout pins. GENERAL APPLICATIONS • Mining • Power • Pulp and paper • Phosphates • Steel/Metals • Chemical • Cement Temperatures: Standard sleeve rated to 180°F (80°C), up to 300°F (150°C) with optional elastomer selection Standard pressure ratings: NPS 2 to 16 (DN 50 to 400) rated to 150 psi (10 bar) CWP NPS 18 to 24 (DN 450 to 600) rated to 90 psi (6.2 bar) CWP Optional pressure ratings: Up to 200 psi (14 bar) CWP Sleeve: Gum rubber (standard) NOTE Zero leakage is defined as no visible leakage of water past the seat at any test pressure up to the fully rated pressure of the valve. Patent 8,016,265 and 5,890,700 Emerson.com/FinalControl © 2017 Emerson. All Rights Reserved VCTDS-00

The Mark III incorporates advanced features gained from thousands of installed Clarkson KGD slurry valves, giving you a better overall performer with additional features: • A more robust support disc is incorporated into the one-piece design which resists overcompression of the sleeve. • Internal profile of sleeve provides a pressure assist to the sealing function. • Sleeve profile reduces drag and provides longer service life. • Easier installation in a variety of pipe styles. The Mark III sleeve can be installed in any existing KGD valve, allowing hassle free upgrade to the latest...

CLARKSON MODEL KGD SLURRY KNIFE GATE VALVES SECONDARY SEAL The one-piece, self-adjusting, molded elastomer secondary seal eliminates any leakage between the knife gate and top of the valve body in any orientation. The seal also prevents any outside contaminants from getting inside the valve. It is dynamically self-adjusting, eliminating the need for continual adjustment required with conventional style packing. The secondary seal is also used to lubricate the gate as it cycles through the seal, providing smoother gate movement and longer seal life, as well as reducing the force required to...

CLARKSON MODEL KGD SLURRY KNIFE GATE VALVES FEATURES Heavy-duty frame (yoke) designed to accept top removal stem nut, bevel gear or cylinder actuator without welding Standard open and closed lockout/tagout positions (NPS 16 (DN 400) and smaller) The stainless steel gate is completely withdrawn from the process flow in the open position and can be inspected or replaced without taking the valve out of service 316 stainless steel gate is standard Dynamic self-adjusting secondary seal retains long lasting internal lubrication Mark III field replaceable elastomer sleeves with improved...

Natural rubber This category includes all natural gum elastomers, both filled and unfilled and synthetic polyisoprene. Has high tensile strength, superior resistance to tear and abrasion and good resistance to heat build-up. Maximum continuous operating temperature 180°F (82°C). EPDM-HTP Advantages - excellent resistance to heat, ozone and sunlight, very good flexibility at low temperature, good resistance to alkalis, acids, and oxygenated solvents and superior resistance to water and steam. Limitations - poor resistance to oil, gasoline, and hydrocarbon based solvents. Maximum continuous...

DIMENSIONS (Inches) Valve size NPS AB1*B2*C D E F G H J KM N P R NOTES Universal body housing drilled and tapped to match ASME B16.5/150 flanges as standard. PN10 or PN16 drilling is optional. B1 = minimum dimension required for installation. B2 = installed face-to-face. WEIGHTS (lbs) Valve size NPS MH BG AC HC

Note: not all actuators shown are available on all valve sizes. NOTE Open-Closed lockout brackets designed to resist the normal MH or BG operating thrust are supplied as standard through NPS 16 (DN 400), ready to accept an optional factory supplied or customer supplied lockout pin. In order to assure complete lockout compliance, any AC, HC or EM actuated valve must be placed in a ZERO ENERGY STATE by isolating all potential energy sources including electricity, operator supply air or hydraulic fluids. Valves supplied with spring to extend [fail close) or retract (fail open) cylinders...

SPECIAL COATINGS TO ENHANCE SERVICE LIFE Emerson is a leader in coating technology with broad experience using special coatings in various industries and applications on a worldwide basis. Each of the coatings below offer advantages in service life and operation, improving performance and adding value. SSEC: Synergistic surface enhancement coating Well suited for use in applications where corrosive media or abrasion is a problem, SSEC is ideal for applications with sticky, viscous media, scaling/plating or where galling is a problem. The low coefficient of friction eliminates "stick-slip"...

Coefficient of friction Temperatures1*1 Thickness (Mils) pH range Abrasion Anti-stick (lubricity) Chemical resistance SSEC As low as 0.09 -250°F to 550°FIbl 0.2 to 3 5 to 8.5 Good Excellent Fair SSEC+ Static as low as 0.10 -250°F to 500°F 0.5 to 2.0 5 to 8.5 Good Excellent Good TBSEC As low as 0.06 -200°F to 550°F 2 to 10 4 to 10 Excellent Fair Fair PBSEC Static as low as 0.4 Cryogenic to 275°FIcl 3 to 5 Below 0 to 14 Fair Not recommended Excellent PBSEC-80 0.19 Cryogenic to 300°F 10 to 20 0 to 14 Excellent Fair Excellent a.Stated temperatures are above normal operating temperature of the...