OEM manufacturer MSS SP-99 · ASME B16.34 · ASME B1.20.1 · ASME B16.11
Needle Valves — Forged Instrument Valves
Needle valves are small, fine-adjustment valves with a slender tapered stem that seats in a small orifice. Teshi Group manufactures forged and bar-stock needle valves for instrument isolation, sampling and metering in sizes NPS ¼ to 1.
Also called: instrument needle valve, forged needle valve, high pressure needle valve, root valve, metering valve
What is a Needle Valve?
A needle valve uses a long, tapered plunger driven by a fine-thread stem into a matching seat. Many turns are needed to go from closed to open, so flow can be set precisely and shut off tightly at high pressure. Needle valves are used as root and isolation valves for pressure gauges, transmitters and sample points, and for low-flow metering. They are made from forged or bar-stock bodies with integral or bonnet construction, often combined in 2-, 3- and 5-valve manifolds.
Key features
- Integral bonnet and union bonnet designs; rising stem
- Hard-seat (stainless stem) or soft-seat tip options
- Male / female NPT, socket-weld, butt-weld and compression ends
- Back-seating stem and anti-blowout design
- Sizes NPS ¼–1; angle and straight patterns
Specification
| Supply | OEM manufacturer — Teshi Group, India |
|---|---|
| Standard | MSS SP-99 (instrument valves, NPS 2 and smaller), ASME B16.34; threads ASME B1.20.1; socket-weld ends ASME B16.11 |
| Sizes | NPS ¼, ⅜, ½, ¾, 1 |
| Pressure rating | Rated in psi at 100 °F per design and material; MSS SP-99 covers ratings up to 15,000 psi |
| End connections | NPT male/female, socket-weld, butt-weld, tube compression |
| Body — cast carbon steel | ASTM A216 WCA, WCB, WCC |
| Body — cast low-temperature steel | ASTM A352 LCB, LCC, LC1, LC2, LC3 |
| Body — cast alloy steel | ASTM A217 WC1, WC6, WC9, C5, C12, C12A |
| Body — cast stainless steel | ASTM A351 CF8, CF8M, CF3, CF3M, CF8C, CN7M (Alloy 20), CK3MCuN (6Mo) |
| Body — cast duplex and super duplex | ASTM A995 / A890 Grade 4A (CD3MN, 2205), 5A (CE3MN, 2507), 6A (CD3MWCuN) |
| Body — cast nickel alloys | ASTM A494 M35-1 (Monel), CY40 (Inconel 600), CW-6MC (Inconel 625), CW-12MW (Hastelloy C), CX2MW (Hastelloy C22), N-12MV (Hastelloy B) |
| Body — forged | ASTM A105, A350 LF2 / LF3, A182 F5, F9, F11, F22, F91, F304 / F304L, F316 / F316L, F321, F347, F904L, F44, F51, F53, F55; ASTM B564 nickel alloys; ASTM B381 titanium |
| Body — bronze and copper-nickel | ASTM B148 C95800 nickel-aluminium bronze; ASTM B369 C96200 (90/10) and C96400 (70/30) copper-nickel |
| Body — titanium | ASTM B367 Grade C-2 (cast); ASTM B381 F2, F5, F7, F12 (forged) |
| Grade availability | Every grade listed is made or supplied against order, with EN 10204 3.1 certificates (3.2 / third-party inspection when specified) and PMI on alloy, stainless, duplex and nickel grades. |
| Testing | Hydrostatic shell and seat test; gas seat test where specified |
| Documents | EN 10204 3.1 material certificates (3.2 / third-party inspection when specified), pressure test certificate, dimensional report, GA drawing; IBR certification when specified |
Applications
- Pressure gauge and transmitter isolation
- Sample and drain points
- Hydraulic and high-pressure gas lines
- Low-flow metering and purge lines
- Instrument manifolds
Material grades
All gradesFAQ
Needle Valve: common questions
What is a needle valve used for?
It is used where precise flow adjustment or tight isolation of small lines is needed, mainly at instrument tapping points, sample lines and hydraulic systems.
Can a needle valve be used for full flow isolation of process lines?
No. A needle valve has a small orifice that restricts flow heavily. It suits instrument tapping points and small-bore service; use gate, globe or ball valves for isolating main process lines.
What end connections are available?
Needle valves are available with male and female NPT threads, socket-weld and butt-weld ends, and tube compression ends. Bodies are straight or angle pattern, and valves can be combined into 2-, 3- or 5-valve manifolds.
Which standard covers needle valves?
MSS SP-99 covers instrument valves, including needle valves, in NPS 2 and smaller with ratings up to 15,000 psi at 100 °F. Pressure ratings at higher temperatures are given by the manufacturer for the material.
Need a size or grade not listed here?
Our engineering team manufactures against your drawing or datasheet, with dimensional sign-off before dispatch.
Send us your specificationTraceability
From mill heat to your site
- 01
Approved mill material
Received against the mill certificate; heat number registered.
- 02
Forging & machining
Heat number carried through every stage in our Indian works.
- 03
PMI, dimensional & NDT
Every lot inspected to the governing standard; TPI witness on request.
- 04
Stamped & certified dispatch
Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.
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