The Bray Knife Gate Series 740 features a robust one-piece, cast body construction, delivering exceptional durability across a wide range of applications, from general purpose to demanding media handling environments. Designed with a replaceable soft seat as a standard feature, the Series 740 gate valve offers easy automation for on/off control applications. Whether handling challenging materials or more routine processes, the Bray Knife Gate Series 740 ensures reliable, long-lasting performance in diverse industrial settings.
· Crates: When lifting packed valves in crates, a forklift truck should be used with the correct fork attachments to ensure safe handling.
· Cases: For valves packed in cases, lifting should be done at the designated lifting points and at the marked center of gravity. This ensures the load remains balanced. Always comply with local safety regulations during transportation and handling.
· When handling unpacked valves, appropriate lifting equipment must be used, adhering to the specified weight limits.
· Valves should be handled on pallets, with special attention given to protecting any machined surfaces to prevent damage.
· For larger bore valves, rigging should be done with proper tools and equipment to prevent the valve from shifting or falling during lifting. This ensures stability and safety throughout the process.
· Safety First: Always use safe and proper lifting techniques. The points listed below are for reference only. It is essential to adhere to correct lifting procedures and ensure that all safety measures are followed.
· No Additional Equipment: Do not lift valves that are attached to adjoining pipes or other equipment. The valve should be lifted independently to avoid strain or damage.
· Proper Equipment: Use lifting equipment that is rated for the weight of the valve and ensure compliance with jurisdictional safety regulations.
· Suggested Lifting Points: For valves positioned horizontally, the recommended lifting points include eye bolts inserted into flange-through holes. These eye bolts can be used to lift the valve body securely.
· 2” to 12” Valves: For valve sizes ranging from 2” to 12”, a sling can be wrapped around the top of the valve body to provide safe lifting support.
· Lifting with Bevel Gear Actuator: For knife gate valves equipped with bevel gear actuators, a sling or chain should be wrapped around the bevel gear actuator body. This should be done between the mounting plate and the input shaft housing.
· Dual Lifting Method: In addition to the sling around the bevel gear actuator, the valve body should also be lifted. This dual lifting method ensures that the weight is distributed safely and that the valve remains stable during the lifting process.
Figure 2: Knife Gate Valve with Bevel Gear Actuator, Horizontal Lifting
· Lifting Procedure: For knife gate valves equipped with pneumatic cylinder actuators, a sling should be wrapped around the cylinder near the cylinder head, specifically at the piston rod end. This lifting method should be used in conjunction with lifting from the valve body to ensure the load is balanced and secure.
Take extra care to prevent any bumps, dents, or damage to the cylinder tube during the lifting process. Proper protection should be used to preserve the integrity of the cylinder.
· Do Not Lift Using Tie-Rod Ends: The cylinder's tie-rod ends should not be used for lifting, as they are not designed to support the weight of the valve and could result in damage or unsafe lifting conditions.
Figure 3: Knife Gate Valve with Pneumatic Cylinder Actuator, Horizontal Lifting
· Lifting Procedure: For knife gate valves with handwheel actuators, a sling or chain can be wrapped through the rim of the handwheel to lift the valve. In the case of chainwheel actuators, a sling should be positioned between the yoke/legs and the chainwheel/guide assembly. This lifting method should be combined with lifting from the valve body to ensure balanced and secure handling.
· Bevel Gear Actuators: When lifting valves with bevel gear actuators in a vertical orientation, slings or chains should be wrapped around the top of each leg.
· Caution: Avoid placing any side load on the bevel gear input shaft or the valve's threaded stem to prevent damage to these components.
· Lifting Procedure: For valves with pneumatic cylinder actuators in a vertical orientation, wrap slings around the top of each leg.
· Caution: Ensure that the cylinder tube is not bumped, dented, or damaged during the lifting process. Additionally, avoid placing any side load on the cylinder's piston rod.
· Prohibited Lifting Method: The cylinder's tie-rod ends should not be used for lifting.
· Lifting Procedure: For valves with handwheel or chainwheel actuators, slings or chains should be wrapped around the top of each leg or yoke side to safely lift the valve.
· Caution: Avoid placing any side load on the valve’s threaded stem to ensure proper lifting and prevent any mechanical stress.
