Project Description

Located within Honolulu's historic Punchbowl Crater, the National Memorial Cemetery of the Pacific spans approximately 112 acres and is one of the nation's most recognized military memorial sites. The crater, known as Pūowaina, is commonly called "Punchbowl" because of its bowl-shaped volcanic formation.

As a sacred place of remembrance, the cemetery's grounds are visited by families, veterans, and the public throughout the year. Maintaining the grounds with care is an important part of showing respect for those who are honored at the site. Reliable irrigation infrastructure helps keep the cemetery's extensive landscaping healthy and well cared for.

The DWS-PRV combines pressure regulation with solenoid-operated control, allowing irrigation zones to operate automatically while maintaining controlled downstream pressure. Its slow-to-open and slow-to-close operation helps reduce pressure surges and water hammer.

Challenges and Solutions

• Maintaining Controlled Irrigation Across a Significant Landscape

  Large irrigation systems require reliable control over when and where water is delivered. The DWS-PRV combines solenoid operation with downstream pressure regulation to provide controlled water delivery while maintaining consistent pressure.

• Reducing Pressure Surges and Water Hammer

  Rapid valve opening or closure can create pressure surges that place unnecessary stress on irrigation infrastructure. The DWS-PRV's slow-to-open and slow-to-shut operation helps reduce water hammer and pressure fluctuations.

• Supporting Reliable Operation in Irrigation Water Conditions

  Irrigation systems may encounter debris and other foreign material. The DWS-PRV features a mechanically self-cleaning and self-purging internal control port that helps prevent accumulation without screens or filters.

• Simplifying Maintenance

  Internally ported, corrosion-resistant metallic components are serviceable from the top of the valve, helping simplify maintenance when service is required.

Benefits and Outcomes

• Automated Irrigation Control

  Remote solenoid operation allows irrigation zones to operate automatically while maintaining controlled downstream conditions.

• Consistent Pressure Regulation

  The adjustable pressure regulating pilot can be set from 5 to 100 PSI and is designed to maintain downstream pressure within 5% of its setting.

• Reduced Water Hammer

  Slow-to-open and slow-to-shut operation helps minimize pressure surges associated with rapid changes in flow.

• Self-Cleaning Performance

  The mechanically self-cleaning and self-purging internal control port helps maintain reliable operation without screens or filters.

• Simplified Serviceability

  Internally ported components and top-access serviceability help simplify maintenance.

Products Used