Valves play a critical role in controlling the flow of liquids and gases across a wide range of industrial, commercial, and process applications. With so many varieties available, selecting the correct type of valve requires careful evaluation of the application requirements.
Considering the following five factors can help ensure reliable performance and safety.
#1: Media Type
The characteristics of the liquid or gas being controlled are a primary factor in valve selection, as they directly influence material compatibility. When handling harsh or corrosive media, materials such as polytetrafluoroethylene (PTFE) and perfluoroalkoxy alkanes (PFA) are commonly used due to their chemical resistance and durability in aggressive environments.
For pressurized gas applications, metal valves are typically recommended, as they provide higher strength and improved safety compared to plastic alternatives.
#2: Application Considerations
It is essential to understand the operating temperature, pressure, and flow rate of the application in which the valve will be operating in. These variables inform the selection of the correct valve sizing, which is one of the most important steps in selecting the right valve. An improperly sized valve can lead to operational issues within the valve itself or elsewhere in the system, such as excessive pressure drop or unstable flow control.
In most cases, metal valves are capable of withstanding higher temperatures and pressures than plastic valves, making them better suited for demanding process conditions.
#3: Valve Function
The intended function of the valve should be clearly defined before beginning the selecting process. Two-way valves are commonly used for simple on-and-off flow control, while three-way valves offer additional flexibility for diverting or mixing media.
It is also important to consider the valve’s normal operating position. If a valve is expected to remain open or closed most of the time, selecting a valve that is normally in that position and only changes state when energized can help ensure performance and extend its service life.
#4: Actuation Method
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Another key consideration is how the valve will be expected to operate. Some applications require manual, hand-operated valves, while others require automated operation.
If automatic actuation is needed, the type of actuator must be selected based on system requirements. Common options include electric, pneumatic, and hydraulic actuators, each offering different advantages depending on available utilities, response time, and control requirements.
#5: Maintenance Requirements
Maintenance needs should also factor into valve selection, particularly in systems where routine cleaning or servicing is required. Ball valves are often a good choice in these situations, as they resist clogging and are among the simplest valve types to service.
Ball valves are also available in three-piece configurations, consisting of two end caps and a central body section. This design allows the valve body to be removed for cleaning or maintenance without disconnecting the end caps from the piping, reducing downtime and helping keep the process line in operation.
Innovative Solutions from
AAV-1000B Series Angle Seat Valves
AAV-1000B Series Bronze Angle Seat Valves are air-operated and designed for applications that require reliable bi-directional flow and automated on and off control. These 2-way, normally closed valves serve as a streamlined alternative to more complex actuated ball valve assemblies.
These valves are suitable for neutral and select aggressive fluids, supporting use with steam, certain liquids and gases, and vacuum applications. A standard PTFE seal, along with a floating seal and self-aligning gland, helps maintain sealing integrity across varying operating conditions. Optical position indication is provided as standard for quick visual confirmation of valve status.
Key Features
- 2-way, normally closed, pilot-operated design
- Bi-directional flow capability
- Bronze body construction
- PTFE seal for broad fluid compatibility
- Floating seal and self-aligning gland for sealing integrity
- Optical position indication standard
Series ZV1 Electric Zone Valves
Series ZV1 Electric Zone Valves are designed for reliable flow control in hot and cold water HVAC systems, where zone control is used to regulate room temperature. Commonly paired with thermostats, these valves provide dependable on and off control in hydronic heating and cooling applications.
These valves are electrically driven to open and spring-return to close, supporting fail-safe operation. Available in 1/2 ", 3/4 ", and 1 " sizes with 24 or 120 VAC power supplies, making them suitable for a wide range of HVAC installations. Designed for straightforward installation, the ZV1 Series can serve as a direct replacement for many competitor zone valves. An externally accessible manual override lever allows for easy operation during setup, testing, or maintenance.
- Electric zone valves for hot and cold water HVAC systems
- Electrically driven open with spring return close
- Available in 1/2 ", 3/4 ", and 1 " pipe sizes
- 24 VAC or 120 VAC power supply options
- External manual override lever for easy access
- Direct replacement for many competitor zone valves
- Optional auxiliary switches and connection types available
- 220 VAC power supply available by consultation
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