Filters / Screens Flow Orifices and Flow Restrictors
Description
Flow orifices and flow restrictors are devices used to control the flow rate of fluids in a system. They achieve this by providing a fixed or adjustable restriction in the flow path, which reduces the flow rate to a desired level. These devices can be designed with multiple openings for increased control and may be bi-directional or constructed for high-purity applications.
Working Principle
Flow orifices and flow restrictors work by creating a pressure drop across the device, which reduces the flow rate of the fluid passing through. The size and shape of the orifice or restrictor determine the amount of flow reduction. These devices are useful because they allow for precise control of fluid flow, which is essential in many engineering applications. By maintaining a constant pressure, temperature, and viscosity, they ensure consistent flow rates, which is critical for processes that require exact fluid delivery.
Applications
Flow orifices and flow restrictors are used in a variety of applications. In particle counting, they serve as an inactive control method by maintaining a constant flow rate. In water jet applications, they convert pressure energy into velocity, producing a high-speed stream of water. They are also used in atmospheric burners to regulate gas flow, ensuring sufficient velocity and suction for efficient combustion.
Advantages over other Flow Orifices and Flow Restrictors
Some flow orifices and flow restrictors offer unique advantages, such as the ability to handle high-purity applications, which is crucial in industries like semiconductor manufacturing. Devices traceable to standards such as those from the National Institute of Standards and Technology (NIST) and the American Society of Mechanical Engineers (ASME) provide assurance of accuracy and reliability.
Limitations
One limitation of flow orifices and flow restrictors is that they rely on a constant pressure, temperature, and viscosity to maintain accurate flow rates. Any variation in these parameters can lead to inaccuracies in flow control. Additionally, they may not be suitable for applications requiring variable flow rates, as they are typically designed for fixed flow reduction.
Considerations
When selecting flow orifices and flow restrictors, it is important to consider factors such as initial costs, operating expenses, and durability. Devices with multiple openings or those designed for high-purity applications may have higher initial costs but offer greater control and reliability. Operating expenses can vary depending on the need for maintenance and replacement, which should be factored into the overall cost analysis. Durability and accuracy are also critical considerations, especially in applications where precise flow control is essential.
from O'Keefe Controls Co.
Checked orifices are a series arrangement of a precision orifice, a ball check valve and an optional screen. The all metal assemblies are made of brass or stainless steel. Gas or liquid can flow in one direction only, at a rate established by the metering orifice. Reverse pressure differential does... [See More]
- Orifice Diameter: 0.0102
- Max Gas Flow: 0.0562 to 0.1635
- Max Pressure: 200
- Media Temperature: ? to 300
from O'Keefe Controls Co.
Checked orifices are a series arrangement of a precision orifice, a ball check valve and an optional screen. The all metal assemblies are made of brass or stainless steel. Gas or liquid can flow in one direction only, at a rate established by the metering orifice. Reverse pressure differential does... [See More]
- Orifice Diameter: 0.0102
- Max Gas Flow: 0.0562 to 0.1635
- Max Pressure: 200
- Media Temperature: ? to 300
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. Type DEL is a two-piece construction. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1680 to 1.68
- Max Pressure: 2000
- Max Gas Flow: 0.0109 to 0.1750
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. Type DEL is a two-piece construction. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1680 to 1.68
- Max Pressure: 4000
- Max Gas Flow: 0.0109 to 0.1750
from O'Keefe Controls Co.
For research and development of products requiring flow metering, it is convenient to have an accurate array of precision orifices. The kits described on this page provide a wide range of orifice sizes and a corresponding wide range of metered flow. Metal orifice and sapphire orifice kits use... [See More]
- Material: Brass; Brass
- Features: Filters
from O'Keefe Controls Co.
Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to as large as .035" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 100
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to as large as .035" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 100
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to as large as .035" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 100
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Gas Flow: 0.0099 to 0.1635
- Max Liquid Flow: 0.1500 to 1.5
- Fitting Type: Adapter
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Gas Flow: 0.0099 to 0.1635
- Max Liquid Flow: 0.1500 to 1.5
- Fitting Type: Adapter
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Gas Flow: 0.0099 to 0.1635
- Max Liquid Flow: 0.1500 to 1.5
- Fitting Type: Adapter
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Gas Flow: 0.0099 to 0.1635
- Max Liquid Flow: 0.1500 to 1.5
- Fitting Type: Adapter
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. Type DEL is a two-piece construction. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1680 to 1.68
- Max Pressure: 2000
- Max Gas Flow: 0.0109 to 0.1750
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. Type DEL is a two-piece construction. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1680 to 1.68
- Max Pressure: 4000
- Max Gas Flow: 0.0109 to 0.1750
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 2000
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 4000
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 2000
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
One-piece construction of solid metal is employed. Orifices are accurately machined, thoroughly cleaned, and flow tested to exacting standards. Sizes range from .004" to .125" orifice diameter. Special sizes can be made to order. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 4000
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
The inserts shown on this page are designed to press-fit into openings accurately machined in fittings, manifolds and custom parts. There is a choice of insert sizes and materials of construction. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 2000
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
The inserts shown on this page are designed to press-fit into openings accurately machined in fittings, manifolds and custom parts. There is a choice of insert sizes and materials of construction. [See More]
- Max Pressure: 4000
- Max Gas Flow: 0.0099 to 0.1635
- Max Liquid Flow: 0.1500 to 1.5
- Connection: Push-to-Connect; .281" Press-Fit Insert
from O'Keefe Controls Co.
Precision orifice assemblies that adapt to common fittings used in process instruments and hydraulic systems are shown. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 2000
- Max Gas Flow: 0.0099 to 0.1635
from O'Keefe Controls Co.
The Precision Micro-Orifices ® are constructed of brass or stainless steel with orifice sizes from .0003" to .005" diameter. The orifices are used to accurately meter very low flow rates of gases or liquids. Optional stainless steel screens are available to protect the tiny orifices from minute... [See More]
- Orifice Diameter: 3.00E-4
- Max Gas Flow: 1.77E-5 to 1.34E-4
- Max Pressure: 200
- Connection: Female NPT; 1/8" NPT Female
from O'Keefe Controls Co.
The restrictors incorporate a precision synthetic sapphire orifice which is fitted within a main body. The sapphire orifice is a stable, accurate flow restrictor. Standard sizes range from .0012" to .0252" orifice diameter in 32 increments. [See More]
- Orifice Diameter: 0.0039
- Connection: Male NPT; Barbed or Ribbed End; 1/8" NPT Male
- Max Pressure: 100
- Fitting / Connection Size: 1/8" NPT Male
from O'Keefe Controls Co.
The restrictors incorporate a precision synthetic sapphire orifice which is fitted within a main body. The sapphire orifice is a stable, accurate flow restrictor. Standard sizes range from .0012" to .0252" orifice diameter in 32 increments. [See More]
- Orifice Diameter: 0.0039
- Connection: Male NPT; 1/8" NPT Male
- Max Pressure: 100
- Fitting / Connection Size: 1/8" NPT Male
from O'Keefe Controls Co.
Precision orifice assemblies that adapt to common fittings used in process instruments and hydraulic systems. [See More]
- Orifice Diameter: 0.0102
- Max Liquid Flow: 0.1500 to 1.5
- Max Pressure: 2000
- Max Gas Flow: 0.0099 to 0.1635
from Air Logic
The Filtered Orifice Restrictors are designed for use in pneumatic control circuits. The orifice restrictor and a stainless steel filter are encased in a molded housing with barbs for 1/16" or 1/8" I.D. flexible tubing. The Dutch Weave wire screen is constructed of stainless steel. The filter is... [See More]
- Orifice Diameter: 0.0070
- Flow Tolerance: 4
- Max Pressure: 100
- Media Temperature: 40 to 120