Needle Valves Information

A needle valve is used to accurately control flow rates of clean gasses or fluids. The adjustments are gradual and smooth for controlling the flow rate, however, they can also be used as a reliable shut-off valve. However, they are generally only used for low flow rates and have a relatively large pressure drop from the inlet to the outlet.

SK manufactures a complete line of precision needle valves. Before making your valve selection, be sure to consider the system pressure, operating temperature, required flow and materials of construction.

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Technical Specifications:

Needle valve size are Available: 1/16” to 2” and 3mm to 50mm

End connections are available in ODT / Screwed / Socket & Butt Weld / Flanged.


Needle Valve types:

IBNV - (Integral-Bonnet Needle Valve)

SBNV – (Screwed Bonnet Needle Valve)

HPNV – (High Pressure Needle Valve)

UNBV – (UNION Bonnet Needle Valve)

MINI-NV– (Miniature Needle Valve)


Bonnet Assembly:

♦ Bonnet: back seated blow out proof.

♦ Spindle: ground and thread rolled. Packing below thread.

♦ Spindle Tip: non-rotating tip shut-off type & soft seated.

♦ Dust cap: dust cap protects stem threads from external contamination heat code traceability.


Technical Specification:


Size: 1/4" & 1/2" & 3/4"

Custom size available as per requirement


End Connection: NPT, BSPT, BSP & Socket Weld.


Working Pressure: 6000 psi (413 bar)


Temperature Rating: PTFE 450° f(232°c) Grafoil 700° f (371°c")


Optional sour gas service valves are available confirming to nace mr-01-75


Stem Packing: PTFE, Grafoil.


All valves are 100% factory tested prior to shipment.

♦ Pneumatic seat test is performed at 1/4 of working pressure. Hydrostatic shell test is performed at 1.5 times the working pressure optional test are available upon request.


♦ Molybdenum disulphide (mo s2)


Material of Construction:

Needle Valve are available in MOC 316 stainless steel as a standard. Needle Valve can also be manufactured in Brass, SS 316L, Monel and other exotic alloys upon request. Raw material outsourced meets requirements of one or more following ASTM specifications.


Bar Stock



Stainless Steel

ASTM A 276 / A479 SS316

ASTM A 182 SS316

DIN 4401

DIN 4401






ASTM B16 Alloy 360

ASTM B 124 Alloy 377





ASTM B 453 Alloy 345

BS 2872 CZ 122

Alloy 400 (Monel)

ASTM B 164 / ASME SB 164

ASTM B 564 / ASME SB 564

Alloy 825 (Inconel)

ASTM B 425

ASTM B 564 / ASME SB 564

Alloy C-276 (Hastelloy)

ASTM B 574

ASTM B 564

SAF 2507 (Super Duplex)

ASTM A 479

ASTM A 182


End Connection Specifications:

 Specifications/standards given in the following table are followed for threaded end of the tube fittings.

End Connection Type

Reference Specifications


ASME B1.20.1, SAE AS71051

 ISO/BSP Parallel

ISO 228


ASME 16.5

ISO/BSP Tapered

ISO 7, BS EN 10226-1

SAE (Unified)


♦ Always use thread sealants on pipe threads. Do not apply sealant / PTFE on tube end of fitting.

♦ Always use O-rings / Gaskets with parallel threads.



All the Needle Valve manufactured by us are ultrasonically cleaned and free from oil and other impurities.