API · ASME · DIN · EN standard industrial valves
Needle Valves
Instrument-size valves with a needle-shaped stem for precise metering and fine flow adjustment.
Last updated: 2026-10
Family specifications
| size range | DN3–DN25 (1/8"–1") |
|---|---|
| size range | 1.5–8 mm typical |
| pressure class | up to 414 bar / 6,000 psi (MAWP stamped on nameplate) |
| temperature range | −54 °C to +232 °C with PTFE packing, up to +538 °C with graphite |
| end connections | NPT or BSP (male/female), Compression tube ends 1/4"–1/2", Socket-weld and butt-weld on request, Panel-mount hardware |
| flow coefficient | Cv ≈ 0.05 to 1.8 (depends on orifice and tip) |
| bonnet stem options | Screwed or union bonnet, Non-rotating stem, V-tip, regulating tip, or soft-seat tip, Anti-tamper or lockable handles |
| design standards | MSS SP-99, ASME B16.34 |
| testing standards | MSS SP-99 / ISO 5208 hydrostatic shell and seat tests |
| body materials | 316 SS, Alloy 400, Alloy C-276 |
| packing materials | PTFE, PEEK, Graphite |
| nva pressure rating | 6000 PSI (414 bar) standard; 10000 PSI on selected SKUs |
| nva temperature range | -65°F to 600°F (-54°C to 316°C) |
| nva size range | Imperial 1/8 to 1 inch; metric M6 to M28 |
| nva end connections | Double sleeve NPT thread; BW ends on selected SKUs |
| nva body materials | Copper, SS 316, carbon steel, and other special materials |
| nva flow capacity | 0.4 to 1.2 GPM |
| nva cone angles | 1:50 and 1:60 standard needle cone angles |
| nva seat materials | Soft seat materials such as tin and copper |
| nva seat sealing | Conical surface sealing between valve plug and seat; corrugated pipe stem-to-seat sealing |
| nva high pressure sku | 10000 PSI SS 316 needle valve, customized sizes, BW ends (SKU) |
| nva 304 sku | SS 304 needle valve, custom sizes, 3000 PSI, external thread (SKU) |
| nvb size range | 1/8 to 1 inch |
| nvb pressure rating | Pressure rating to 10,000 psi |
| nvb materials | Body 316 cold worked stainless steel; packing glass-filled Teflon; stem 17-4 PH |
| nvb stem tips | V-stem, regulating, and soft seat stem tips |
| nvb end connections | Male/female NPT, manufacturer tube fittings, and ISO threads from 1/8 to 1 inch |
| nvb npt mawp | NPT series MAWP up to 60,000 psig (4136 bar) |
| nvb temperature | -100°F to 600°F (-73°C to 316°C) |
| nvb body alloy options | Stainless steel, carbon steel, brass, and alloy 400 available |
| nvc pressure rating | Up to 6000 psig (413 bar) LN series; HLN severe-service series up to 10,000 psig (689 bar) |
| nvc temperature range | -100 to 1200°F (-73 to 648°C) on LN/HLN severe-service series |
| nvc packing | Live-loaded PTFE and PEEK chevron packing |
| nvc stem tip | Chrome-plated 316 SS vee-type and PCTFE soft-seat stem tips |
| nvc 400 series | 400 Series lower packing needle valves: working pressures up to 5000 psig, packing below stem threads |
| nvc 400 series flow | Orifice sizes up to 0.562 in. and end connections up to 1 in. (400 Series) |
| nvc 400 series specs | MAWP up to 5000 psig; temperature -40° to 450°F (-40 to 232°C); 316 SS V-Stem and PCTFE soft-seal; straight and angle patterns |
| nvc ln orifice cv | LN4: 0.156 orifice (max. Cv 0.34); LN6: 0.250 (0.85); LN8: 0.437 (2.18) |
| nvc patterns | Straight, angle, and gauge patterns |
| nvd pressure rating | Working pressures up to 6000 psig (413 bar) on O, 1, 18, 20, and 26 series |
| nvd temperature | Temperatures up to 600°F (315°C) |
| nvd packing | Live-loaded packing system |
| nvd stem designs | Vee stem all series; soft-seat all series; regulating stem on O, 1, and 18 series |
| nvd orifice | 1 series valves with orifice of 0.172 in. (4.4 mm) or 0.250 in. (6.4 mm) |
| nvd body materials | 316 SS, brass, steel, alloy 400 body materials |
| nvd end connections | Tube fittings 1/4 to 3/4 in. and 3 to 18 mm; female/male NPT 1/8 to 1/2 in.; female ISO |
Ordering & documentation
Documents
Ask for the documentation set with the inquiry — typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order — state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Frequently asked questions
What standards govern the design and testing of needle valves?
The published specification for this family lists MSS SP-99, ASME B16.34 as the design standards. Testing follows MSS SP-99 / ISO 5208 hydrostatic shell and seat tests.
What sizes and pressure ratings are available for needle valves?
The published size range is DN3–DN25 (1/8"–1"), and the published pressure ratings are up to 414 bar / 6,000 psi (MAWP stamped on nameplate). Availability of a specific size and rating is confirmed at quotation.
What materials are needle valves available in?
The published specification lists body materials: 316 SS, Alloy 400, Alloy C-276. Material availability for a specific size and rating is confirmed at quotation.
What working temperature range do needle valves cover?
The published working temperature range is −54 °C to +232 °C with PTFE packing, up to +538 °C with graphite. For a medium at the edge of the range, confirm the suitability of the selected seat and body materials at quotation.
What end connections do needle valves support?
The published specification lists NPT or BSP (male/female), Compression tube ends 1/4"–1/2", Socket-weld and butt-weld on request, Panel-mount hardware as the available end connections. The connection for a specific size is confirmed at quotation.
What should a quotation inquiry for needle valves include?
The governing standard and class, nominal size, body and seat materials, the service medium with temperature, and the destination — anything missing is confirmed during quotation.
Types in this family
Type
Needle Gauge Valves
Needle gauge valves isolate pressure instruments from the process, in three-port and block-and-bleed designs so gauges and transmitters can be removed or vented
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Integral Bonnet Needle Valves
Integral bonnet needle valves serve instrument and general-purpose metering duty where frequent packing maintenance is unwelcome: the bonnet is part of the body
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Lower Packing Needle Valves
Lower packing needle valves place the stem packing below the stem threads, keeping lubricant on the threads and corrosive or erosive media away from them — posi
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Rising Plug Gauge Valves
Rising plug gauge valves use a soft-seated, straight-through rising-plug trim instead of a needle stem, so dirty or viscous media can be rodded through and the
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Locked Bonnet Needle Valves
Locked bonnet needle valves clamp the bonnet to the body through a machined metal joint held by a locking ring, so vibration, packing adjustment or an over-rota
View specifications →Request a quote for needle valves
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