Where Quality Meets Service & Value
Manufactured and Assembled in
Costa Mesa, California U.S.A.
toll free
(866) 452-2349
Where Quality Meets Service & Value
Manufactured and Assembled in
Costa Mesa, California U.S.A.
toll free
(866) 452-2349
Overview
The ultimate in on/off product cycle life, our "Life Series" needle valves comprise a Virgin PTFE tipped needle for exceptionally low torque, long life on/off operation. In applications where the end user needs to operate a needle valve from open to closed position on a high frequency basis, the "Life Series" provides all the inherent benefits of a Needle Valve while providing a longer service life compared to rigid hard seated needle valves where galling can occur from high frequency on/off operation. 
 
Features:

PTFE On/Off seal is easily replaced in the field, no tools required
Exceptional Low Torque on/off operation
Needle finish, SPI/SPE No. 1. Bubble tight, low torque shutoff long term performance.
All injection molded, rugged design and construction
24 Pitch metering thread. 20% Finer metering control. Excellent Linearity of Flow.
Needle Stem is PTFE sealed for excellent chemical resistance & high purity.
Integrally designed panel mounting, no fasteners required, mounts to panel thicknesses from 1/16" to 1/2".
No elastomers (O-Rings), metals or lubricants, no corrosion, no contamination.

End connections:
1/4", 3/8", 1/2" Female NPT, Solvent Socket "Slip". Tube Connections Available Click Here. 
 
Max Pressure Ratings:
PVC: 180 PSI @ 72° Fahrenheit
CPVC: 200 PSI @ 72° Fahrenheit
Polypropylene: 150 PSI @ 72° Fahrenheit
PVDF: 220 PSI @ 72° Fahrenheit
 
Materials of Construction:
Valve Body & Components: Injection molded in PVC, Glass & Mineral Reinforced Polypropylene, CPVC, & High Purity PVDF. FDA, USDA, and USP standards are either met and/or exceeded, please contact us for further validation. 
Stem Seal & Integral Needle Tip: The stem seal and needle tip seal are machined from 100% Virgin PTFE (Polytetrafluoroethylene).
 
 
 
PLEASE CLICK ITEM # BELOW TO VIEW ADDITIONAL SPECIFICATIONS & DOWNLOADS
Request Information Search by Specification
Unit of Measure
Items
NG-250-PVC

1/4" x 1/4" Female NPT Globe Needle Valve-PVC w/ L Series Needle
List Price $88.95
Image

3/8" x 3/8" Female NPT Globe Needle Valve-PVC w/ L Series Needle
List Price $88.95
NG-250-PVC

1/2" x 1/2" Female NPT Globe Needle Valve-PVC w/ L Series Needle
List Price $94.95
NA-250-PVC

1/4" x 1/4" Female NPT Angle Needle Valve-PVC w/ L Series Needle
List Price $88.95
NA-250-PVC

3/8" x 3/8" Female NPT Angle Needle Valve-PVC w/ L Series Needle
List Price $88.95
Materials N/A PVC
Inlet x Outlet N/A 1/4" Female NPT N/A 3/8" Female NPT N/A 1/2" Female NPT N/A 1/4" Female NPT N/A 3/8" Female NPT
Style N/A Globe Pattern, L Series Needle N/A Globe Pattern, L Series Needle N/A Globe Pattern, L Series Needle N/A Angle Pattern, L Series Needle N/A Angle Pattern, L Series Needle
Seal N/A PTFE
Cv Factor N/A 0.310 N/A 0.310 N/A 0.620 N/A 0.426 N/A 0.426

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Products

Needle Valves
Gauge Guards
Laboratory Faucets
Laboratory Turrets
Lab Base Fixtures
Spray Guns
Accessories
Product Warranty

Services

Custom Product Design & Mfg
Instrument Calibration (NIST)
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Contact Us

sales@marquestscientific.com
1 (866) 452-2349
Monday - Friday
8am - 5pm PST
Marquest Scientific, Inc.
2950 Airway Avenue, Bldg C-5
Costa Mesa, California U.S.A.