Standard Needle Valve
Fine adjustment needle valve for precise flow control in instrumentation applications.
Technical Specifications
| Type | Straight / Angle Pattern |
| Size Range | 1/8" to 1" (3 mm to 25 mm) |
| Body Materials | SS316, Brass, Monel, Alloy 20 |
| Stem Design | SS316, Integral Needle |
| Packing | PTFE, Graphite |
| End Connections | Threaded (NPT, BSP), Compression (Tube Fittings) |
| Pressure Rating | Up to 6000 psi (414 bar) |
| Standards | ASME B16.34, BS 5352 |
Applications
Instrumentation, sampling, gauge isolation, process control
About the Standard Needle Valve
The needle valve is a precision flow-control valve used primarily in instrumentation tubing and small-bore process lines where fine, accurate adjustment of flow is required at pressures up to 6,000 psi (414 bar) - far exceeding what any other compact valve type can achieve. The valve consists of a slender, tapered needle-point plunger that screws into a precision-machined orifice seat. The very small annular flow area between needle and seat at any given stem position gives the valve its characteristic fine, proportional flow control. Multiple turns of the handwheel are required to open fully - this deliberately slow response allows precise adjustment without risk of accidentally slamming the valve open.
Needle valves in instrumentation service perform three distinct functions: isolation (root valves that isolate instruments from the process), flow restriction (constant-flow bleed valves on sample probes), and double-block-and-bleed (DBB) for instrument removal without line depressurisation. Single needle valves, 2-valve manifolds, 3-valve manifolds, and 5-valve manifolds for DP (differential pressure) transmitters are all part of the same product family.
Vajra Industrial Solutions supplies needle valves in body materials of SS316, SS316L, Monel 400, Alloy 20, Hastelloy C-276, and Titanium Grade 2. NPT and BSP screwed ends, compression tube fittings, and flanged ends (for manifolds) cover all instrumentation connection standards. Packing materials include PTFE (standard), graphite (high-temperature), and PEEK (aggressive chemicals). Panel-mount and direct-weld versions for subsea and offshore are available.
Where It's Used
Key industries and applications for the Standard Needle Valve
Pressure transmitter and gauge root valves
single needle valves installed at the process connection to isolate gauges, transmitters, and switch instruments from process; rated pressure must match line MAWP
DP transmitter 5-valve manifolds
two needle isolation valves, two equalisation needles, and one bleed needle in a single compact manifold for differential pressure flow and level transmitters; factory set and tested for zero leak
Sample probe flow control
fine-metering needle valves set to constant low sample flow rates (1–5 L/min) in gas chromatograph analyser sample conditioning systems; SS316 with PTFE packing for hydrocarbon or H₂S service
Chemical injection quill metering
precision SS316 or Hastelloy needle valves controlling corrosion inhibitor, scale inhibitor, or biocide injection rates into pipelines and wellheads; typically 1/4"–1/2" for ml/h to L/h injection
Hydraulic and subsea control
Inconel or SS316 needle valves in HIPPS hydraulic control panels and subsea control modules (SCMs) for ultra-reliable isolation and controlled bleed-down in offshore applications
How to Choose the Right Standard Needle Valve
Select needle valve size based on the required Cv (flow coefficient) at the operating pressure drop - needle valves have very low Cv values and are not suitable for high-flow applications. Match body and packing material to fluid chemistry: SS316 for general process; Hastelloy C-276 or Alloy 20 for acids; Monel for caustic service; Titanium for seawater or HF acid. For DP transmitter applications, always specify a 5-valve manifold rather than individual root valves - the manifold enables safe zeroing and calibration without line shutdown.
Popular Configurations
Most commonly ordered specifications for the Standard Needle Valve
Frequently Asked Questions
About Standard Needle Valve - ordering, specs, delivery & compliance
What standards does the Standard Needle Valve comply with?+
Our Standard Needle Valve complies with ASME B16.34, BS 5352. All products are manufactured to international standards and come with full material test reports (MTR), dimensional inspection reports, and hydrostatic test certificates on request.
What materials are available for the Standard Needle Valve?+
The Standard Needle Valve is available in SS316, Brass, Monel, Alloy 20. Material selection depends on your process fluid, temperature, pressure, and corrosion requirements.
What is the delivery lead time for Standard Needle Valve?+
Standard stock sizes are available for immediate dispatch from our Vadodara warehouse. Custom sizes and special materials typically have a lead time of 2–6 weeks depending on specifications. We serve customers across India within 1–7 business days and export to the Middle East, Southeast Asia, Europe, and the Americas with full export documentation.
Can I get a custom Standard Needle Valve for a specific application?+
Yes. Vajra Industrial Solutions supplies custom-engineered needle valves for specific process conditions. Submit your technical requirements - including pressure class, temperature range, fluid type, end connections, and any special trim or coating needs - via our RFQ form or WhatsApp, and our engineering team will respond within 24 hours.
What pressure ratings are available for the Standard Needle Valve?+
The Standard Needle Valve is available in pressure ratings of Up to 6000 psi (414 bar). Higher-pressure classes are available for critical service applications in oil & gas, power generation, and chemical processing.
How do I request a quote for the Standard Needle Valve?+
You can request a quote by clicking the "Request Quote" button on this page, filling out our RFQ form at vajravyuh.com/rfq, emailing us at sales@vajravyuh.com, or WhatsApping us directly at +91-9979774557. Please include quantity, size, pressure class, material grade, and end-connection type for the fastest response.
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