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Plug Valve — OEM manufacturer, Teshi Group

OEM manufacturer API 599 · ASME B16.34 · API 598

Plug Valves — API 599

Plug valves are quarter-turn valves that open and close by rotating a tapered or cylindrical plug with a through port. Teshi Group manufactures lubricated and non-lubricated (sleeved or lined) plug valves to API 599.

Also called: lubricated plug valve, sleeved plug valve, non-lubricated plug valve, cock valve, API 599 plug valve

Pressure classASME B16.34 class as ordered
Quote in 24–48 hoursSee specifications

What is a Plug Valve?

A plug valve has a plug, usually tapered, sitting in a matching body bore. A port through the plug lines up with the pipe when open; a quarter turn closes it. Lubricated plug valves inject sealant between plug and body to seal and ease turning, and are used on gas and hydrocarbon lines. Non-lubricated valves use a PTFE sleeve or liner and need no maintenance sealant, suiting chemical service. Plug valves give tight shutoff and handle slurries and dirty fluids better than many gate valves.

Key features

  • Lubricated and non-lubricated (PTFE sleeved or lined) designs
  • Regular, short and venturi patterns
  • Tandem plug designs per API 599
  • Lever, gear or actuator operation
  • Fire-safe design available for sleeved valves

Specification

SupplyOEM manufacturer — Teshi Group, India
StandardAPI 599 (metal plug valves, flanged, threaded and welding ends), ASME B16.34
SizesFlanged / butt-weld: NPS ½–36 (DN 15–900); threaded / socket-weld: NPS ½–2
Pressure classASME B16.34 class as ordered
End connectionsFlanged RF/RTJ, butt-weld, socket-weld, NPT
Body — cast carbon steelASTM A216 WCA, WCB, WCC
Body — cast low-temperature steelASTM A352 LCB, LCC, LC1, LC2, LC3
Body — cast alloy steelASTM A217 WC1, WC6, WC9, C5, C12, C12A
Body — cast stainless steelASTM A351 CF8, CF8M, CF3, CF3M, CF8C, CN7M (Alloy 20), CK3MCuN (6Mo)
Body — cast duplex and super duplexASTM A995 / A890 Grade 4A (CD3MN, 2205), 5A (CE3MN, 2507), 6A (CD3MWCuN)
Body — cast nickel alloysASTM A494 M35-1 (Monel), CY40 (Inconel 600), CW-6MC (Inconel 625), CW-12MW (Hastelloy C), CX2MW (Hastelloy C22), N-12MV (Hastelloy B)
Body — forgedASTM 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-nickelASTM B148 C95800 nickel-aluminium bronze; ASTM B369 C96200 (90/10) and C96400 (70/30) copper-nickel
Body — titaniumASTM B367 Grade C-2 (cast); ASTM B381 F2, F5, F7, F12 (forged)
Grade availabilityEvery 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.
TestingAPI 598 shell and seat tests (hydrostatic; low-pressure gas seat test where specified)
DocumentsEN 10204 3.1 material certificates (3.2 / third-party inspection when specified), pressure test certificate, dimensional report, GA drawing; IBR certification when specified

Applications

  • Natural gas distribution and metering
  • Crude oil and products lines
  • Chemical and acid service (sleeved)
  • Slurry and dirty fluid isolation
  • Manifolds and diverter duties

Dimensions & weights

ASME B16.5 pressure–temperature ratingsASME B16.5 · view online · download PDF

Material grades

All grades
ASTM A216 WCBASTM A351 CF8MASTM A105

FAQ

Plug Valve: common questions

What is the difference between lubricated and non-lubricated plug valves?

A lubricated valve seals with injected sealant between plug and body and needs periodic re-lubrication. A non-lubricated valve uses a PTFE sleeve or liner, needs no sealant and avoids product contamination.

What size range does API 599 cover?

API 599 covers flanged and butt-weld plug valves NPS ½–36 and threaded or socket-weld valves NPS ½–2. Three-way and four-way plug valves are outside its scope.

Plug valve or ball valve?

Both are quarter-turn. Plug valves have a larger sealing area and handle slurries and sealant lubrication; ball valves have lower torque and are more common for general isolation.

Are three-way plug valves available?

Three-way and four-way plug valves are outside the scope of API 599. If a multi-port valve is needed, state the port arrangement and design standard in the enquiry and we will confirm what can be offered.

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 specification

Traceability

From mill heat to your site

  1. 01

    Approved mill material

    Received against the mill certificate; heat number registered.

  2. 02

    Forging & machining

    Heat number carried through every stage in our Indian works.

  3. 03

    PMI, dimensional & NDT

    Every lot inspected to the governing standard; TPI witness on request.

  4. 04

    Stamped & certified dispatch

    Hard-stamped pieces with EN 10204 3.1 / 3.2 certificates.

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