CMO Cast Iron Uni-directional Double Acting Knife Gate Valve

A uni-directional wafer knife gate valve featuring an epoxy coated, one-piece cast iron body. A polished stainless steel gate allows a good seal against the EPDM seat. A full-bore design providing high flow rates with low pressure drop. Suitable for liquids that contain a maximum of 5% suspended solids, the valve can be used for dry solids in gravity feed applications when it should be installed with the arrow on the body pointing in the opposite direction to the flow. Designed for use in the paper industry, mining, silo emptying, chemical plants, pumping, food industry, and sewage treatment. This version of the valve is operated by a double acting pneumatic cylinder.

The cylinder requires a minimum air supply pressure of 6 kg/cm3 and maximum of 10 kg/cm3, the air supply must be dry and lubricated. The valves feature a one-piece cast iron body with guides to support the gate and seat wedges. The guides allows the valve to support 30% of the maximum working pressures in reverse flow but it should be noted that the valve won’t be 100% water tight in this situation.

Available in sizes 2” (DN50), 2 ½” (DN65), 3” (DN80), 4” (DN100), 5” (DN125), 6” (DN150), 8” (DN200), 10” (DN250),and 12” (DN300). The valves have a maximum working temperature of 90°C, and a working pressure of 10 bar in the sizes between 2” and 10”, and 6 bar for the 12” size.

KEY FEATURES:

• Full-bore, epoxy coated, one-piece cast body
• Stainless steel gate
• EPDM seat
• Internal guides to support gate and seat wedges
• Uni-directional - able to support 30% working pressure with reversed flow
• Double acting pneumatic cylinder
• Sizes available: 2” to 12”
• Max. working temperature: 90°C
• Working pressure: 10 bar (sizes 2” to 10”), and 6 bar (12”)