Hayward® NVA Series Needle Valves

Hayward® NVA Series needle valves are used for accurate metering of fluids. Each includes a built-in ball check valve with Hastelloy CTM spring to prevent back-flow of the process liquid into the chemical feed line. Turning the thumbwheel moves a tapered piston into the PTFE seat to control the flow down to a few drops per minute.

  • PVC or glass-filled polypropylene
  • PTFE seat
  • Precision molded, fine pitched stem threads
  • Permit this very fine metering flow control
  • Flanges for panel mounting
  • Maximum temperature: 150°F (PVC) & 260°F (PP)
Stock Description Catalog Pg. Price
1/4" Polypropylene Hayward® NVA Series Needle Valve
19371
1/4" Polypropylene Hayward® NVA Series Needle Valve
$79.64​/Each
Save 5%2+$75.65/Each
Save 10%4+$71.67/Each
Save 15%12+$67.69/Each
P-375
$79.64​/Each
On Order
3/8" Polypropylene Hayward® NVA Series Needle Valve
19372
3/8" Polypropylene Hayward® NVA Series Needle Valve
$93.06​/Each
Save 5%2+$88.40/Each
Save 10%4+$83.75/Each
Save 15%12+$79.10/Each
P-375
$93.06​/Each
In Stock
1/2" Polypropylene Hayward® NVA Series Needle Valve
19373
1/2" Polypropylene Hayward® NVA Series Needle Valve
$93.06​/Each
Save 5%2+$88.40/Each
Save 10%4+$83.75/Each
Save 15%12+$79.10/Each
P-375
$93.06​/Each
In Stock
1/4" PVC Hayward® NVA Series Needle Valve
19361
1/4" PVC Hayward® NVA Series Needle Valve
$65.21​/Each
Save 5%2+$61.95/Each
Save 10%4+$58.68/Each
Save 15%12+$55.42/Each
P-375
$65.21​/Each
In Stock
3/8" PVC Hayward® NVA Series Needle Valve
19362
3/8" PVC Hayward® NVA Series Needle Valve
$75.38​/Each
Save 5%2+$71.61/Each
Save 10%4+$67.84/Each
Save 15%12+$64.07/Each
P-375
$75.38​/Each
In Stock
1/2" PVC Hayward® NVA Series Needle Valve
19363
1/2" PVC Hayward® NVA Series Needle Valve
$75.38​/Each
Save 5%2+$71.61/Each
Save 10%4+$67.84/Each
Save 15%12+$64.07/Each
P-375
$75.38​/Each
In Stock

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