Purple Valves
PRPLZ287

Instrument Needle Valve

A stainless instrument needle valve for fine throttling and reliable isolation at gauges, transmitters and sampling points.

Size1/4" to 2"Pressure3000 PSI (WOG)BodyGlobe pattern
Overview

The instrument needle valve is built for the precise, low-flow duty of instrument hook-ups, driving a hardened tapered needle into a small integral seat for fine flow regulation and tight, repeatable isolation. Its compact stainless body mounts straight onto gauge roots, transmitters and sampling points, protecting delicate instruments while allowing controlled bleed and calibration. Smooth threaded actuation and a non-rotating tip give the feel and seat life that instrument technicians rely on.

Technical Detail

Specifications

Size Range
1/4" to 2"
Pressure Rating
3000 PSI (WOG)
Temperature Range
-46°C to 232°C (-50°F to 450°F)
End Connections
Threaded NPT (ASME B1.20.1)
Body Material
316 Stainless Steel (A351 CF8M)
Ball / Disc / Wedge Material
Hardened 316 Stainless Steel tapered needle
Seat Material
Metal-to-metal (integral)
Stem Material
316 Stainless Steel (A182 F316)
Body Style
Globe pattern
Operation
Handwheel
Applications
Isolation and fine throttling at pressure-gauge roots, transmitters and instrument sampling points.
Design Standard
ASME B16.34
Testing Standard
API 598 / MSS SP-99
At a Glance

Key Features

  • Fine throttling for low-flow instrument duty
  • Tight, repeatable isolation
  • Compact stainless body for direct mounting
  • Non-rotating tip protects the seat
  • Smooth threaded actuation

Options

  • Bar or T handle
  • Vent or bleed port
  • Panel mounting bracket
  • Oxygen-clean preparation

Standards & Certifications

  • ASME B16.34
  • API 598
  • MSS SP-99
Contact

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