Single Component Dispensing Precision Dispensing Needle Valves
Description
Single Component Dispensing Precision Dispensing Needle Valves are designed to accurately regulate the flow of liquids and gases at low flow rates. They feature a slender, tapered point at the end of the valve stem that is lowered through the seat to restrict or block flow. This design allows for precise control over the flow, making them suitable for applications requiring fine adjustments and small flow rates.
Working Principle
The working principle of precision dispensing needle valves involves the fluid flowing through the valve, turning 90 degrees, and passing through an orifice that serves as the seat for a rod with a cone-shaped tip. The fine threading of the stem and the large seat area provide precise resistance to flow. These valves are useful because they can control flow into delicate gauges, prevent damage from sudden fluid surges, and allow for gradual flow adjustments or complete stoppage when necessary.
Applications
Precision dispensing needle valves are used in a variety of applications, including the dispensing of adhesives, silicones, chemicals, cleaners, paints, coatings, food and beverages, and lubricants. They are particularly useful in situations where high viscosity materials need to be dispensed with precision, such as in the application of industrial adhesives or in the food processing industry where precise ingredient measurements are critical.
Advantages over other Precision Dispensing Needle Valves
Single component positive displacement valves, a type of precision dispensing valve, offer specific advantages when working with viscous fluids. Their single-part construction lacks weak points found in multi-part devices, allowing them to handle greater pressures and stresses. Additionally, they have fewer seam locations, reducing the risk of external air ingress that could cause aerobically curable products to harden, leading to system backup and downtime.
Limitations
One limitation of precision dispensing needle valves is their potential vulnerability to clogging, especially when used with highly viscous or particulate-laden fluids. This can lead to increased maintenance requirements and potential downtime if not properly managed.
Considerations
When considering the use of single component dispensing precision dispensing needle valves, it is important to evaluate initial costs, operating expenses, and maintenance requirements. These valves are generally easy to clean and maintain, which can reduce long-term operating costs. However, the initial investment may be higher compared to simpler valve systems. Durability and accuracy are key factors, as these valves need to withstand the pressures and stresses of their specific applications while maintaining precise flow control. Replacement and maintenance costs should also be considered, as regular maintenance is necessary to ensure optimal performance and longevity.
from Nordson Corporation
Auto Flo extrude stand-alone, 1/4" ball & seat [See More]
- Number of Components: Single Component
- Material Feed: Continuous Feed
- Dispensing Application: Bead; Spray Round (optional feature)
- Inlet Pressure Range: ? to 5000
from Cammda Corporation
CAMMDA Corporation provides a range of Dispensing Tips/Dispensing Needles - available to suit every dispensing requirement. Precision cut stainless steel for general purpose use, molded polypropylene and flexible polyethylene tips allow dispensing in the most restricted areas. Taper tips provide for... [See More]
- Number of Components: Single Component
- Material Feed: Batch (Syringe)
- Dispensing Application: Dot
- Application: AdhesiveSilicone
from Nordson EFD
The 741MD Series MicroDot ™ needle valve dispenses very precise micro-deposits down to fractions of a microliter. Pneumatically operated and adjustable, it delivers superior fluid dispensing control. Ideal for automated assembly processes, the 741MD-SS valve ’s adjustable needle stroke... [See More]
- Number of Components: Single Component
- Material Feed: Batch (Syringe)
- Dispensing Application: Dot
- Application: AdhesiveSilicone; Lubricants
from Cammda Corporation
CAMMDA Corporation provides a range of Dispensing Tips/Dispensing Needles - available to suit every dispensing requirement. Precision cut stainless steel for general purpose use, molded polypropylene and flexible polyethylene tips allow dispensing in the most restricted areas. Taper tips provide for... [See More]
- Number of Components: Single Component
- Material Feed: Batch (Syringe)
- Dispensing Application: Dot
- Application: AdhesiveSilicone
from Nordson EFD
The 741V Series needle valve design applies low viscosity assembly fluids with accurate, extremely close repeat deposit control. During operation, controlled pulsed air acts on the piston to withdraw the needle a preset distance from the needle seat to provide exact, repeatable fluid flow. The... [See More]
- Number of Components: Single Component
- Material Feed: Continuous Feed
- Dispensing Application: Bead
- Application: AdhesiveSilicone; Inks
from Cammda Corporation
CAMMDA Corporation provides a range of Dispensing Tips/Dispensing Needles - available to suit every dispensing requirement. Precision cut stainless steel for general purpose use, molded polypropylene and flexible polyethylene tips allow dispensing in the most restricted areas. Taper tips provide for... [See More]
- Number of Components: Single Component
- Material Feed: Batch (Syringe)
- Dispensing Application: Dot
- Application: AdhesiveSilicone
from Nordson EFD
Nordson EFD ’s Relius ™ line of portable fluid dispensers is easy to use and offer durable, fail-safe construction with less hand fatigue. Ideal for touchups, low-volume assembly, and field work, our handheld fluid dispensers are compatible with all Nordson EFD syringe barrels, pistons,... [See More]
- Number of Components: Single Component
- Material Feed: Batch (Syringe)
- Dispensing Application: Bead
- Application: AdhesiveSilicone; FluxSolder; Lubricants