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Valmatic Air Valves Product Overviwe

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VAL-MATIC  Its Impact on a Water and Wastewater System
Water & Wastewater industry is the presence of air in a pipeline and
its impact on operations. Many operational problems, especially at the
time of initial start-up, including broken pumps, valves and pipe, as
well as faulty instrumentation readings, are blamed on inadequate
thrust blocking, improper pipeline bedding, etc. In reality, many of these
problems are not caused by improper installation of the line, but by failure
to de-aerate the line. Properly de-aerating your pipeline will safeguard it
from air-related problems, however if no steps are taken to accomplish this,
you should be ready for trouble.

Product For

  • Air Release Valves

  • Air/Vacuum Valves

  • Combination Air Valves

  • Surge-Suppression Air Valves

  • Well Service Air Valves

  • Vacuum Breaker Valves

  • Vacuum Priming Valves

  • Air Valve Sizing Software

Val-Matic for Solutions.
The wide range of air related concerns in pipeline and treatment plant design require a multitude of solutions. With the broadest line of air valves available coupled with Engineering expertise and Manufacturing experience,
Val-Matic is the number one source for solutions to air related issues. The following are a few of the basic valve applications and the solutions Val-Matic can provide.
EFFICIENCY AND VACUUM PROTECTION
The primary purpose of air valves is to provide pipeline efficiency by continuous removal of air at pipeline highpoints and vacuum protection by admitting large quantities of air upon pump shut down or system failure.
SURGE CONTROL
Air valves play an important role in pipelines to control or reduce surges. Surges result from sudden changes in velocity of the pipeline fluid. These velocity changes occur regularly due to pipeline filling, pump operation,
line breaks and power failure. The effects of surges can be devastating. Surges are typically 50 psi for every 1 ft/sec of rapid change in flow velocity. This is added to the pipeline static pressure. Through computer modeling
and transient analysis, it has been shown that air valves can play a critical role in suppressing pipeline surges during column separation conditions.
PIPELINE SURGES

  • Power or system failures can often result in water column separation at high points in the line. If the water column is allowed to separate and form a vacuum pocket, a devastating surge can occur when the columns rejoin. To prevent a vacuum from forming, a Surge-Suppression Air Valve or Vacuum Breaker is used to admit large quantities of air into the pipeline.

  • A Surge-Suppression Air Valve consists of a Combination Air Valve equipped with a Regulated-Exhaust Device that allows full airflow into the pipeline, but restricts the air-flow out of the pipeline. Similarly, a Vacuum Breaker allows rapid entry of air into the pipeline, but prevents flow out of the pipeline. When equipped with an Air Release Valve, the Vacuum Breaker will provide controlled release of air through the small Air

Release Valve orifice. Both methods dampen or suppress surges in the pipeline by temporarily trapping a pocket of air and cushioning the impact of the returning columns of water by regulating the exhaust of the air pocket.

VERTICAL PUMP COLUMN SURGES
High velocity rapidly develops in a pump column when a vertical turbine or deep well pump starts against an air-filled column and closed check valve. A power-actuated check valve must absorb the full force of the impending impact. A mechanical check valve will open, relieving a portion of the force but still sees extreme surges. The best way to prevent surges in the pump column and connecting piping is to regulate the exhaust of the air in
the pump column during pump start-up (AWWA M-51, p. 24). A Well Service Air Valve equipped with either a Dual Port Throttling Device or a Regulated-Exhaust Device vent air from the pump column at a controlled rate so that all or most of the air escapes just before the check valve opens.

  • Air Release Valves

 
  • Air/Vacuum Valves

 
  • Combination Air Valves

 
  • Surge-Suppression Air Valves

 
  • Well Service Air Valves

 
  • Vacuum Breaker Valves

 
  • Vacuum Priming Valves

 
  • Air Valve Sizing Software

 
 
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