Needle Valve

As a Needle Valve Supplier in Dubai, we provide precision small-bore isolation and metering valves for instrumentation, sampling, and impulse lines. These valves use a fine tapered stem for accurate flow regulation and reliable shutoff in compact installations. Commonly found in oil & gas, power, water treatment, and chemical plants, needle valves are valued for their ability to meter, calibrate, and safely vent process media in high-pressure and corrosive environments.

How Needle Valves Work

Needle valves use a fine-threaded, multi-turn stem with a tapered tip that mates into a seat:

Flow regulation: Turning the stem advances the tip into the seat to restrict flow or retracts it to open the passage.
Non-rotating stem tip: Reduces galling and wear, ensuring consistent shutoff and long service life.
Sealing: Packing (PTFE or graphite) seals around the stem, while a back seat protects packing when the valve is fully open.
Bonnet options: Screwed, union, and bolted bonnets are available for different pressure ranges and ease of maintenance.

Benefits

Precise, repeatable regulation for instruments, gauges, and sampling
Bubble-tight shutoff with metal or soft seat options
Long service life from non-rotating stem designs
Compact body for panel, manifold, and close-coupled mounting
Wide material range for sour gas, seawater, and high-temperature duties
Low maintenance with readily available spares and service kits
Effective as instrument valves and gauge isolation valves in analyzer and transmitter lines

Industries Served

Our experience as a Needle Valve Supplier in Dubai extends to:

Oil & Gas: wellhead panels, gauge isolation valves, chemical injection skids
Power Generation: steam/water sampling, analyzer shelters, impulse lines
Water & Desalination: RO skids, product analyzers, plant utilities
Petrochemical & Chemical: reactor instrumentation, instrument valves for corrosion monitoring
District Cooling & Industrial Utilities: chilled water and process control loops
Marine & Offshore: topsides instrumentation, seawater service with CRAs

Technical Specifications

Size range: 1/8 in to 1 in (DN 6 to DN 25)
Pressure ratings: up to 6,000 psi (413 bar); high-pressure models to 10,000 psi (690 bar)
Temperature range: −54 °C to +260 °C (higher with graphite packing and alloy trims)
Orifice/Cv: micro-orifice to high-Cv trims for venting or blow-down service
End connections: NPT (ASME B1.20.1); BSPP/BSPT (ISO 7-1); double-ferrule tube ends (6–25 mm / 1/4–1 in); socket-weld on request
Seats & tips: metal-to-metal or soft-seat (PTFE/PCTFE); V-tip, regulating tip, or shutoff tip
Bonnet styles: screwed, union, bolted; anti-tamper lock cap available
Packing: PTFE standard; graphite for higher temperatures; live-loaded options
Compliance: NACE MR0175 / ISO 15156 for sour service when specified

Design Standards

MSS SP-99 – instrument valves
ASME B16.34 – pressure-temperature design ratings
ASME B1.20.1 – NPT threads; ISO 7-1 – pipe threads
ISO 15848 – fugitive emissions where required
Compatible with industry double-ferrule tube fitting standards

Inspection and Testing

Hydrostatic and pneumatic shell/seat tests to ISO 5208 / EN 12266
Helium leak testing available for critical services
Functional torque and stroke checks; proof and burst testing by design
PMI, hardness, and visual inspection per specification
Material traceability with EN 10204 3.1 or 3.2 certificates
Third-party inspection available when specified

Body and Trim Material Compatibility

Category	Material / Grade	Standards / Grades	Typical Applications
Barstock Stainless	316 / 316L	ASTM A479 / A276	General service, seawater, analyzer lines
Super Austenitic	6Mo (F44 / 254SMO)	ASTM A182 / A276	High chlorides, desalination units
Duplex / Super Duplex	2205 (F51), 2507 (F55)	ASTM A182	Seawater and chloride-rich duties
Nickel Alloys	Monel 400, Inconel 625	ASTM B164 / B446	Sour gas, high temperature, aggressive media
Hastelloy	C276	ASTM B574 / B564	Strong oxidizers and severe corrosion
Carbon Steel	A105 / LF2	ASTM A105 / A350	Non-corrosive utilities, instrument air
Bronze / Brass	C83600 / DZR Brass	ASTM B62 / CW602N	Low-chloride utilities, specific project needs
Soft Seats / Packing	PTFE, PCTFE, Graphite	Manufacturer Spec	Sealing elements for low torque and high temperature duty

Special Features

Non-rotating stem tips to minimize galling and extend seat life
Anti-tamper caps for secure settings on critical instruments
Integral vent or bleed ports for safe depressurization
Compact handles and panel-mount options for analyzer racks and shelters
Oxygen cleaning and degreasing available when specified
Color-coded handles and tagged flow direction for quick identification
Low-emission packing options for ISO 15848 compliance
Customisation available for end connections, bonnets, trims, and handle styles to suit project standards