Knife Gate Valve

UNI-TECH: knife gate valves provide reliable and long life on variety of tough applications including corrosive and abrasive services. Key aspects like operating , service life. Through  continuous process improvement our products are competitive enough to meet the global requirements. UNITECH KNIFE GATE VALVES are designed for isolation, on off and throttling application.MSS SP-81 applies to bonnetless metal seated knife gate valves, 2" to 24" size, 150 psi CWP. Sizes above 24" are not covered under this standard. Additionally, resilient seated knife gate valves and slide knife gate valves are also not covered under MSS SP-81. These products are subject to the individual manufacturer's internal testing and design standard.Body- MSS SP-81 requires the valve body (pressure vessel and related structure) to be designed for and hydrostatically pressure tested to 1.5 times the rated working pressure.    Valve rated pressure - 150 psi    Body test pressure - 225 psiGate - MSS SP-81 requires the gate to be designed for and hydrostatically pressure tested to 1.1 times the rated working pressure.    Valve rated pressure - 150 psi    Gate test pressure - 165 psiSeat - MSS SP-81 has an allowable leakage rate (for metal to metal seated valves) of 40 cc per inch of diameter, per minute at 40 psi pressure. On a 12" valve this would be equal to 40 times 12, or 480 cc per minute at 40 psi.    Maximum allowable leakage of 0.6 GPM when tested with water at 40 psi applied in the normal flow direction.    No visible leakage when tested with water at 40 psi (for soft seated valves only).Face to Face - MSS SP-81 has specified face-to-face dimensions and tolerances for each valve size to assure ease of installation for the consumer, regardless of the valve manufacturer.      Typical Applications    Medium & Heavy duty applicationsSizes available    50-500mm (2 to 20)Pressure rating Cast iron body    CWP 10 bar, 50-300mm (2, 12) size; lower on higher sizesSteel/St. Steel    CWP 10 bar, 50-600mm (2, 20) size; lower on higher sizesFace-to face    Complies with MSS SP-81 (upto 900mm (36) size)Drilling    To suit ANSI 150lb,AS 2129 Table D & E, DIN PN10 (others on some sizes)Material availability    standard; others on requestBody    Steel, stainless steel (304, 316)Gate    304, 316 st. steelPacking    PTFE syntex fiber standard; others on requestSeat / Leakage    Metal-to-metal, As per MSS SP-81 (upto 500mm (20) size     Resilient seats, EPDM, Chloroprene, Viton, Zero leak     PTFE, Max leakage of 4cc/min/inch (upto 600mm (24) sizeSuperstructure    Steel, epoxy paintedHandwheel    Cast iron, epoxy painted Actuators    Is available / Hand wheel Operated / Motorized & Pneumatics