E Catalogue

40 NEEDLE VALVES Needle Valve 741V Series Precision needle valve applies low-viscosity fluids in accurate, repeatable amounts. Because the stainless steel needle seats in the tip adapter, there is virtually no dead fluid volume between shots. Features and Benefits • Unaffected by entrapped air in fluid • Low-maintenance design • Zero dead fluid volume • Positive shutoff For use with: Accelerators Marking Inks Silicone Oils Solvents UV-cure Adhesives Specifications Size: 114.6 mm length x 26.9 mm diameter (4.51" x 1.06") Weight: 317.5 g (11.2 oz) Actuating air pressure required: 70-90 psi (4.8-6.2 bar) Maximum input fluid pressure: 300 psi (20.7 bar) Fluid inlet thread: 1/8 NPT female Fluid outlet: Male luer lock Mounting: 1/4-28 UNF tapped hole Cycle rate: Exceeds 400 per minute Air cylinder body: 303 stainless steel Fluid body: 303 stainless steel Piston: 303 stainless steel Needle: 303 stainless steel Tip adapter/needle seat: 303 stainless steel SafetyLok ™ collar: Nylon Needle packings: PTFE Note: All stainless steel parts are passivated. 7007029 (741V-SS Valve) Air cylinder and fluid body is passivated 303 stainless steel. Includes fluid inlet fittings #7021499 and #7007038. 7021239 (741V-SS-TR Valve) Same as 741V-SS but tamper resistant. 7015584 (741V-SS-BP Valve) Air cylinder and fluid body is passivated 303 stainless steel. Includes fluid inlet fittings and BackPack valve actuator #7015581. Piston and Needle Stroke Control Stroke Reference Piston Spring Air Cylinder Body Packing Spring Needle Packings Fluid Body Fluid Inlet 1/8 NPT Mounting Hole 1/4-28 UNF Needle Seat and Tip Adapter Actuating Air Input 10-32 UNF The ValveMate 8000 controller can control up to (4) 741V Series valves to optimize production line efficiency. Refer to page 52. www.nordsonefd.com info@nordsonefd.com USA & Canada 800-556-3484 Europe +44 (0) 1582 666334 Asia +86 (21) 3866 9006 The BackPack Valve Actuator mounted on the air cylinder of the 741V Series valve maintains constant pressure at the actuating air inlet, for faster response time without the risk of process variations due to a fluctuating plant air supply or different air line lengths. • High-speed cycle capability. Cycle rates exceed 60-80Hz • Actuation speed as low as 5-6 milliseconds • Smaller deposit size capability due to faster valve actuation speed • Improves process variation for better dot-to-dot consistency BackPack is available preinstalled on new valves, or can be ordered separately (#7015581) to retrofit existing valves. BACKPACK ™ VALVE ACTUATOR