No. While the Cv rating indicates flow capacity, it does not fully define control performance on its own. Evaluating the flow-pressure curve, rangeability, and inlet pressures is essential for precise regulation.
› Applications › Industrial Compressed Air
INDUSTRIAL COMPRESSED AIR
Industrial Compressed Air Valves
The pressure available at the compressor does not always match what reaches the machine. Valves, regulators, and check valves must be engineered based on actual flow rates, pressure drops, and target air quality. VAMECA provides expert guidance for selecting and replacing your network components with dependable local support.
Technical Selection · Supply Across Quebec and Canada
ARI PREDU · Pressure Regulating Valves
Comparing upstream supply to the point of use during peak demand helps distinguish an overall capacity shortfall from a localized distribution restriction.
Design configuration to be selected based on operating pressure, flow rate, and air quality requirements.
REAL-WORLD OPERATING CONDITIONS
The challenge: delivering the precise flow rate at the right pressure
An air demand specification must define the flow rate, its reference baseline, and the required pressure at the point of use. Standardized volume, SCFM, and actual volumetric flow rates are not directly interchangeable.
Peak Flow Rate
Simultaneous equipment demand can cause system pressure to drop. Evaluate minimum, nominal, and peak flow rates, as well as their duration.
Pressure Drop
Piping, filters, dryers, fittings, and valves all contribute to pressure drop. Measuring pressure levels under operating load provides far more actionable insight than a single static reading.
Air Quality
Specify your requirements for particulate, moisture, and oil levels. The presence of condensate or lubricants directly impacts seal compatibility and maintenance intervals.
UNDERSTANDING THE APPLICATION
From air treatment to machine operation
Piping system functions and their layout depend on the specific facility design. Industrial valves must maintain full compatibility with process treatment equipment and plant maintenance procedures.
Application example. Configuration and equipment to be specified based on your installation requirements.
Isolate a section
An isolation valve enables the positive shut-off of a piping segment or equipment. Safe lockout/tagout procedures also require complete dissipation of residual energy in strict accordance with site protocol.
Adjust the operating pressure
A pressure regulator is selected based on its pressure range and control capacity at the required flow rate, not solely on connection size.
Preventing Backflow and Overpressure
Check valves and relief valves serve distinct functions; proper selection must account for your specific piping network and the critical equipment requiring protection.
SELECTABLE TECHNOLOGIES
Key Piping System Components to Assess
Isolation Valves
Ball valves can provide an optimal, low-resistance flow path. Ensure pressure, temperature, sealing performance, and lockout/tagout (LOTO) capabilities are properly evaluated for your specific application.
Industrial Pressure Reducing Valves
The setpoint adjustment must remain fully operational across the entire flow range. ARI PREDU offers specialized trims for compressed air applications. Operating curves, design pressures, and the final engineered configuration must be verified.
Check Valves
Verify gas service compatibility, flow direction, cracking pressure, and pressure drop. Please note that a check valve must not be used as an isolation device for lockout/tagout (LOTO) procedures.
Pressure Relief Valves
Set pressure and relieving capacity must match the overpressure scenario and the protected equipment. Line size alone is not sufficient to properly size and select a safety relief valve.
Gaskets and Connections
A seat or connection leak can lead to continuous system loss. Gasket material, seating surface condition, threading, and assembly procedures must all be evaluated together.
Pneumatic Actuation
To properly size and supply an actuator, specify the actual operating pressure available, the required stroke time, and the cycle consumption. Refer to the equipment manufacturer documentation for the required air quality standards.
MATERIALS & SEALING SOLUTIONS
Air composition is another critical factor
Air can be dry, humid, lubricated, or carry contaminants. Simply specifying "air" is therefore not enough to properly select and validate a seat or seal.
EPDM should not be selected by default if mineral oil is present. Specific NBR or FKM compounds must also be validated based on your application's operating temperature.
MAINTENANCE & REPLACEMENT
A pressure drop does not always require a new compressor
Selection example · Machine air supply deficiency
The system appears stable at shut-off, but pressure drops as soon as equipment starts up. Measure the differential pressure upstream and downstream of your most restrictive components during this operating cycle. A clogged filter, an undersized fitting, or a regulator operating outside its calibrated range is often the root cause.
Non-operational consumption
Check for leaks and continuous purging, then inspect any equipment that remains energized.
Unstable downstream pressure
Compare regulator flow curves against actual flow rates and upstream pressure variations.
Noisy or Chattering Check Valve
Verify valve sizing and operating range directly with the manufacturer, rather than relying solely on nominal pipe size.
VAMECA TECHNICAL SUPPORT & CONSULTING
The Right Data for Proper Valve Sizing
We partner with maintenance teams, system integrators, and contractors to address isolation, control, and replacement requirements. Providing a basic piping and instrumentation diagram (P&ID) or system schematic helps us pinpoint the exact component.
Technical Resources
Upstream pressure and downstream working pressure
Minimum, Nominal, and Peak Flow Rates
Flow Rate Units and Reference Conditions
Temperature and Air Quality
Diameter, Connection Type, and Function
Nameplate, Photo, and Required Documentation
Clarify the function
Isolation, control, check, or protection: we define the precise requirements and operating conditions to specify to the manufacturer.
Compare Designs
We assess materials, interfaces, actuation, and the required documentation to meet your project specifications.
Prepare Procurement
You will receive a quote based on your selected configuration. Availability, lead times, and technical documentation are confirmed upon formal quotation.
FREQUENTLY ASKED QUESTIONS
Key Considerations Before You Specify
Reliable product selection starts with precise operating data. Here are the key details required for sizing or replacement inquiries.
LEARN MORE
Your Application, in Operating Context
Partner Technical Documentation
YOUR SPECIFIC APPLICATION REQUIREMENTS
Looking to isolate, regulate, or optimize the reliability of an air line?
Send us your pressure ratings, flow rates, and existing part numbers. Our local technical specialists will assist with your component sizing and selection.