Needle Valve

From instrumentation lines to process systems, our valves are manufactured to hold tight tolerances and repeatable performance across each production batch. 

Working Mechanism of Needle valve:

• Handwheel is turned, rotating a threaded stem

• Stem motion is converted into straight-line travel of the needle

• Needle is tapered, so it enters the seat gradually, not all at once

• As the needle advances into the seat, the flow opening narrows

• Further turning fully seats the needle, sealing the orifice and stopping flow

• Reversing the handwheel retracts the needle, reopening the passage

• Small stem movements produce small, precise changes in flow this is what enables fine throttling

• Differs from ball/gate valves, which shift between full open and full closed rather than metering flow

Materials of Construction:

SVR Global needle valves are available in a range of materials selected according to the pressure, temperature, and media compatibility of the application:

• Stainless steel (SS304, SS316, SS316L)

• Carbon steel

• Alloy steel

• Duplex and super duplex steel

• Brass

• Bronze

Seal and seat materials are selected to match service conditions, including nitrile and other elastomer or metal to metal sealing options for high temperature or corrosive media.

Sizes and Pressure Ratings:

• Sizes ranging from 1/4" up to 2"

• End connections: threaded, socket weld, and compression fittings

• Pressure classes to suit low, medium, and high pressure instrumentation and process lines

Needle valve Industries Applications:

SVR Global supplies needle valves to sectors where controlled, incremental flow regulation is a functional requirement:

• Oil and gas production, refining, and pipelines - Isolation and metering of process fluids in upstream, midstream, and downstream facilities

• Petroleum and petrochemical processing - Controlled fluid delivery of feedstocks, catalysts, and process fluids

• Power plant applications - Regulation of steam, water, and fuel flows in turbine and boiler systems

• Water and wastewater treatment plants - Dosing and sampling control through the various stages of treatment

• Chemical processing industries - Controlled delivery of corrosive or reactive fluids in both batch and continuous process systems

• Offshore oil platforms and ships - Flow control of hydraulic, fuel, and utility fluids

• Mining and minerals processing - Regulation of process fluids including reagents and slurry additive delivery

• Paper manufacturing - Control of chemical injection and process water in production line systems

• Instrumentation and aerospace applications - Precision fluid regulation in test equipment and monitoring systems

• Desalination and seawater treatment - Flow regulation in filter and reverse osmosis systems

Standards of Needle valve:

• API - Governs design, materials, and testing for valves used in oil and gas service

• ASME (B16.34, B31.3, etc.) - Sets pressure temperature ratings and dimensional standards for valve construction

• ANSI - Defines pressure classes and end-connection dimensions for interchangeability

• ISO - Provides internationally recognized design, testing, and quality benchmarks

• DIN - Covers dimensional and material standards common in European-spec piping systems

• AWWA - Applies to valves used in water and wastewater infrastructure

• NACE MR0175 / ISO 15156 - Governs material selection for sour service (H₂S-containing environments)

Quality Control and Testing Process:

• Raw material verification against mill certificates

• Dimensional inspection for tolerance compliance

• Hydrostatic shell testing for pressure integrity

• Seat leakage testing for shutoff tightness

• Functional cycle testing of stem and needle

• Visual inspection of surfaces and threads

• Final specification check before dispatch

• Test reports and certificates issued for traceability