Hayward NVAHayward Flow Control recently redesigned its NVA Series needle valves with an integrated stem and PTFE seat for optimal control and performance, as well as:
Accurate flow control that allows for adjustment of flow rates down to drops per minute.

  • Fine-pitch stem threads for precise adjustments.
  • Non-shock-rated operation up to 150 PSI at 70°F.
  • NPT threaded ends, plus a GFPP thumb wheel.
  • Flanges for mounting panels.
  • Sizes from 1/4 to 1/2 inches (DN8 to DN10).
  • Availability of PVC and GFPP with FPM seals.
  • Suitability for the fine regulation of flow that is required in instrumentation and laboratory work, including water and wastewater treatment, chemical processing, food and beverage, pharmaceutical, marine and corrosive environments.
  • A 2-year warranty.