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Needle Valves
Alco N Series High-Pressure Needle Valve, 1/4" Female NPT, 3000 psi, SS316, N2NS-3K
Alco

Alco N Series High-Pressure Needle Valve, 1/4" Female NPT, 3000 psi, SS316, N2NS-3K

Mfr. part no.
N2NS-3K
SKU
NV-UK-03K-FF-04

Specifications

Series N Series
Maximum Pressure 3000 psi @ 38°C
Temperature Range -40 to +230°C
Connection Size 1/4" Female NPT
Valve Pattern Straight / inline
Body Material 316 Stainless Steel
Packing Material RTFE
Orifice Size 4 mm
Stem Tip Hardened non-rotating 17-4PH

Key Features

  • Rated to 3000 psi at 38°C
  • 1/4" Female NPT end connection
  • Compact SS316 straight-pattern body
  • Metal-to-metal seat for positive shutoff
  • Hardened non-rotating tip helps reduce wear
  • RTFE packing with back-sealing stem
  • Made in UK.

Description

The Alco N2NS-3K is a 1/4" female NPT high-pressure needle valve rated to 3,000 psi at 38°C, with an operating temperature range of -40 to +230°C. It features an SS316 straight-pattern body, metal-to-metal seat, hardened 17-4PH non-rotating tip, RTFE packing and a stainless steel T-bar handle. Its compact design provides accurate flow adjustment and dependable shutoff for pressure gauges, transmitters, sampling lines and small-bore process systems.

Applications

  • Gauge and pressure transmitter isolation
  • Sampling panels and analyzer lines
  • Chemical injection and dosing skids
  • Hydraulic and pneumatic control lines
  • High-pressure process isolation and throttling

Documents

  • Alco Instrumentation Valves — Catalog

    PDF, 7.1 MB

  • Alco N Series Needle Valves — Datasheet

    PDF, 153 KB

Cross-reference

The closest equivalents from other brands, with the differences stated so you can check before you order.

HOKE (Crane Instrumentation & Sampling) 2219F4Y

2219 Series Severe Service Needle Valves — Forged Body, Union Bonnet

Hoke 2219F4Y — 2219 Series severe-service needle valve, 1/4 in female NPT, 316 stainless steel forged body with union bonnet, 6,000 psig at 70°F (414 bar at 21°C), 0.250 in (6.4 mm) orifice, Cv 1.09, Grafoil packing, non-rotating 316 stainless steel stem tip. Listed here as a cross-reference, not as an identical part. The Alco N2NS-3K offered on this page is rated 3,000 psi at 38°C, half the Hoke valve's rating, and has a 4 mm orifice against 6.4 mm, so flow capacity is materially lower. Packing is RTFE rather than Grafoil, which sets the continuous service ceiling at 230°C, and the stem tip is hardened 17-4PH rather than 316 stainless steel. Check pressure rating, flow capacity and service temperature against your duty before substituting.

Parker Hannifin (Instrumentation Products Division) 4F-U6LR-T-SS

U Series Needle Valves — Union Bonnet, 6,000 PSI Maximum (Catalog 4110-NV)

Parker 4F-U6LR-T-SS - U Series union-bonnet needle valve, 1/4 in female NPT (ANSI/ASME B1.20.1), 316 stainless steel body, regulating stem, PTFE packing, 6,000 psig (414 bar) CWP, -54 to +232 C. Listed here as a cross-reference to help buyers searching that number; the valve on this page is the Alco equivalent indSpare stocks. Please read two differences before substituting. Pressure: the Parker part is rated 6,000 psi, while this valve is the 3,000 psi build - it must not be used in a 6,000 psi service. For a like-for-like 6,000 psi equivalent see the Alco N2NS. Flow: the Parker part has a 0.228 in (5.8 mm) orifice and Cv 0.78, against a 4 mm orifice and published Cv 0.6 on the Alco N Series 1/4 in valve, so it passes roughly 30 per cent more at the same opening. Port size, 316 stainless body, non-rotating 17-4PH stem tip, metal-to-metal seat and metal-to-metal body-to-bonnet seal correspond on both. The Parker valve is supplied with an aluminium T-bar handle as standard; this valve has a stainless steel T-bar handle.

We carry N2NS-3K as the indSpare-stocked equivalent. Looking for a different brand? Request a quote →

Browse every published equivalence

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