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KNIFE-GATE VALVES ‐Unidirectional wafer‐design knife gate valve. ‐One‐piece cast body with guides to support gate and seat wedges. ‐Provides high flow rates with low pressure drop. ‐Various seat and packing materials available. ‐Face‐to‐face dimension in accordance with CMO standard. ‐An arrow is marked on the body indicating the flow direction. General Applications: ‐This knife gate valve is suitable for liquids that contain a maximum of 5% suspended solids. If it is used for dry solids in gravity feed applications it should be installed with the arrow on the body pointing in the opposite direction to the flow. Designed for applications such as: ‐Paper Industry ‐Mining ‐Silo emptying ‐Chemical plants ‐Pumping ‐Food Industry ‐Sewage treatment Sizes: ND50 to ND2000 (larger sizes on request). Working Pressure: ‐ND50 to ND150: 10kg/cm2 ‐ND200: 8kg/cm2 ‐ND350 to ND400: 5kg/cm2 ‐ND250 to ND300: 6kg/cm2 2 2 ‐ND450 to ND600: 3kg/cm ‐ND700 to ND1400: 2kg/cm ‐These pressures must be applied to the valve in the direction of the arrow marked on the valve’s body. Due to the valve’s design with gate support guides, 30% of these pressures can be applied in the opposite direction to the arrow. Standard Flanges: DIN PN10 and ANSI B16.5 (class 150) Other Common Flanges: DIN PN 6 DIN PN 16 DIN PN25 BS "D" and "E" ANSI 150 Others on request: Directives: Machinery Directive: DIR 2006/42/EC (MACHINERY) Pressure Equipment Directive: DIR 97/23/EC (PED) ART.3, P.3 Potential Explosive Atmospheres Directive: DIR 94/9/EC (ATEX) CAT.3 ZONE 2 and 22 GD For further information on categories and zones please contact the CMO Technical‐ Commercial Dept. Quality Dossier: ‐ All valves are tested hydrostatically at CMO and material and test certificates can be provided. ‐ Body test = working pressure x 1.5. ‐ Seat test = working pressure x 1.1. C.M.O. Amategui Aldea 142, 20400 Txarama‐Tolosa (SPAIN) TEC‐A.EN05 Tel. Nacional: 902.40.80.50 Fax: 902.40.80.51 / Tel. Internacional: 34.943.67.33.99 Fax: 34.943.67.24.40 cmo@cmo.es http://www.cmo.es Page 1

KNIFE-GATE VALVES When a knife gate valve remains open for long periods of time and the body’s internal walls are parallel a very large torque is required to close it. Model A’s body is cone‐shaped inside, providing greater space. This way, when the valve is closed the solids stored inside it can be easily removed. This valve is defined as unidirectional and these valves are normally at risk of the gate bending due to counter‐pressure. This cannot happen with the CMO valve because it contains internal guides that support the knife gate and allow it to work under ...

KNIFE-GATE VALVES 1‐ BODY Unidirectional wafer‐design knife gate valve. One‐piece cast body with guides to support gate and seat wedges. For diameters greater than ND1200 the body is machine‐welded with the necessary reinforcements to resist the maximum working pressure. Full port designed to provide high flow rates with low pressure drop. The body’s internal design prevents any build up of solids in the seat area. The standard manufacturing materials are GJL‐250 cast iron and CF8M stainless steel. Other materials, ...

KNIFE-GATE VALVES Note: Three materials are available for the reinforced socket and the deflector (CA‐15 steel, CF8M and Ni‐hard). Resilient seat materials EPDM This is the standard resilient seat fitted on CMO valves. It can be used in many applications, however, it is generally used for water and products diluted in water at temperatures no higher than 90°C*. It can also be used with abrasive products and it provides the valve with 100% watertight integrity. NITRILE...

KNIFE-GATE VALVES GREASED COTTON (Recommended for hydraulic services): This packing is composed of braided cotton fibres soaked in grease both inside and out. It is for general use in hydraulic applications in both pumps and valves. DRY COTTON: This packing is composed of cotton fibres. It is for general use in hydraulic applications with solids. COTTON + PTFE: This packing is composed of braided cotton fibres soaked in PTFE both inside and out. It is for general use in hydraulic applications in both pumps and valves. ...

All types of actuators can be supplied, with the advantage that the CMO design is fully interchangeable. This design allows the customer to change the actuators themselves and normally no extra assembly accessories are required. In the event any accessory is required, CMO will supply it. Manual: Automatic: Handwheel with rising stem Electric actuator Handwheel with non‐rising stem Pneumatic cylinder Chainwheel Hydraulic cylinder Lever Gear Box Others (square nut,...) Wide Range of Accessories Available: Mechanical stops ...

KNIFE-GATE VALVES ACCESSORIES AND OPTIONS Different types of accessories are available to adapt the valve to specific working conditions such as: Mirror Polished Gate The mirror polished gate is especially recommended in the food industry and, as standard, in applications in which solids can stick to the gate. It is an alternative to ensure the solids slide off and do not stick to the gate. PTFE Lined Gate As with the mirror polished gate, it improves the valve’s resistance to products that can stick to the gate. Stellited Gate ...

KNIFE-GATE VALVES Connection Boxes, Wiring and Pneumatic Piping Fully assembled units can be supplied with all the necessary accessories. Stroke Limiting Mechanical Stops Fig. 8 Mechanical Locking Device Allows the valve to be mechanically locked in a set position for long periods of time. Emergency Manual Actuator (Hand Wheel /Gear Box) Allows manual operation of the valve in the event of power or air failure. Triangular (V‐Notch) and Pentagonal Diaphragm with Indication Rule (Fig. 8) Recommended for applications in which flow regulation is required. Allows flow ...