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Brand: Flowserve
Flowserve Durco BTV-2000 Lined Butterfly Valve
Description
Flowserve Durco BTV-2000 lined butterfly valve overview
The Flowserve Durco BTV-2000 (listed on the product page as BTV) is a fully lined wafer or lug butterfly valve for corrosive chemical service. A fluoropolymer or UHMWPE liner covers the body and an encapsulated disc covers the wetted metal, so acids, bleach and chlorinated media never touch the ductile-iron structure. Seven Star LLC supplies the BTV-2000 as an independent supplier in Muscat for projects in Oman and the GCC.
A companion version, BUV-2000, uses UHMWPE for abrasive service; the brochure covers both. Flowserve states it introduced the first fluoropolymer-lined butterfly valve in 1965, which gives the BTV-2000 a long field history.
BTV-2000 technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Flowserve Durco / BTV-2000 (series) |
| Type | Fully lined wafer or lug butterfly valve |
| Sizes | 2 in (50 mm) to 24 in (600 mm) |
| Rating | Full vacuum to 150 psi (1,034 kPa); DIN PN10 and PN16 available |
| Design criteria | MSS SP-67, API 609, ISO 5752/20 |
| Body | ASTM A395 ductile cast iron, split body, epoxy coated |
| Liner | Rigid machined PTFE or UHMWPE, about 1/8 in (3 mm) thick, recessed in body |
| Disc | One-piece PFA or UHMWPE encapsulated, nickel-plated ductile iron substrate, or metal alloys |
| Temperature | PTFE liner with PFA disc to 177 °C (350 °F); UHMWPE liner and disc to 93 °C (200 °F) |
| Fasteners | B7 high-strength |
| Shaft drive | Double-D with interchangeable ISO, MSS or special actuator mounting plate |
The brochure notes that applications above 180 °F are subject to review, so state your temperature clearly.
How the BTV-2000 seals
The seat is a spherical ball-and-socket contact between disc and liner giving 360 degree contact, with a live-loaded elastomer seat energizer in a machined body groove. Because the energizer works independently of flange bolt torque, the line seal does not depend on how the mating flanges are tightened. The recessed liner resists cold flow and installation error.
The stem has a triple seal. The primary seal is the ball-and-socket at the disc hub, the secondary is a PTFE-covered PFA convoluted path, and Viton O-rings in the alloy gland follower stop atmospheric leakage and external corrosion. A compression spring keeps the preload constant, so the shaft seal needs no adjustment. Optional NPT connections allow sealing lubricant, inert gas padding, purge or leak detection.
Liner, disc and material options for BTV-2000
| Option | Use |
|---|---|
| PTFE liner | Severely corrosive chemicals; virgin PTFE, spark tested at 20,000 volts |
| UHMWPE liner and disc | Abrasive and erosive media with corrosion; ASTM D4020 grade; to 93 °C |
| PFA encapsulated disc | Standard for chemical service |
| Metal discs | 316 stainless, Durimet 20, 254 SMO, Monel, Chlorimet 2 and 3, palladium-stabilized titanium |
| Sentinel seats | Listed on the product page as a seat option for high-performance duty |
Where the BTV-2000 fits
The BTV-2000 is a line-isolation and throttling valve for lined pipework, and its disc swing is compatible with ASTM F423 fluoropolymer-lined pipe. It sits alongside Flowserve lined plug valves (T4E) and lined ball valves in the same corrosion-resistant range. Manual operation uses a 10-position locking lever with throttle plate or gear operator; automation uses pneumatic or electric actuators on the ISO mounting plate.
Selection and ordering checklist for BTV-2000
- Fluid and concentration, with temperature range
- Size, wafer or lug body, and flange standard (ASME or DIN PN10/PN16)
- Liner: PTFE or UHMWPE, and disc: PFA, UHMWPE or alloy
- Abrasive solids present, yes or no
- Manual lever, gear or actuator
- Need for purge, gas pad or leak-detection connections
- Vacuum duty, if any
Installation and maintenance of the BTV-2000
Valves ship with covers protecting the liner; keep them on until installation. Notches on the body centre the valve between flanges. Use flanges compatible with lined pipe, open the disc slightly before bolting so it clears, and tighten the bolts evenly. Every valve is spark tested and hydrostatically tested before shipment, with seat test at 150 psi and stem seal test at 225 psi per the brochure. The split body supports rebuild, and the shaft seal needs no periodic adjustment.
Typical BTV-2000 applications in Oman and the GCC
PTFE-lined BTV-2000 valves handle hydrochloric, nitric and sulfuric acid, chlorinated brine, bleach, wet chlorine, chlorine dioxide, solvents and sodium chlorate. In Oman and the Gulf this means chlor-alkali and chemical plants, water treatment and desalination chemical lines, pickling and electroplating, and pulp bleaching. Heat and dust call for epoxy-coated bodies and sealed actuators.
Choosing between PTFE and UHMWPE builds of BTV-2000
The decisive question is whether the fluid carries solids. In clean but aggressive acid or chlorinated service, the PTFE liner with a PFA encapsulated disc is the normal choice, and it reaches the higher temperature limit of 177 °C. Where particles scour the liner, a UHMWPE liner and disc gives better abrasion resistance but is limited to 93 °C, so a hot slurry may need a different valve type altogether. When a process swings between cleaning and operating temperatures, give both values so the liner and disc pairing can be checked against the worst case rather than the average.
Disc selection is the second decision. Metal discs in the alloys listed above are used where greater protection is required than an encapsulated disc offers. Because the shaft passes through the disc, the stem seal materials follow the disc choice, and the PTFE-to-PFA or PTFE-to-alloy stem seal is part of the build data.
Information to send with an RFQ for BTV-2000
- Medium, concentration and temperature
- Size and pressure or vacuum requirement
- Wafer or lug, flange standard
- Liner and disc materials
- Operator type and actuator data
- Quantity and site
Documents and quotation
A Flowserve BTV-2000 technical brochure is attached on this page for reference.
Seven Star LLC is an independent supplier in Muscat. Send the series name BTV-2000 with your service data and we will confirm a quotation.
Datasheets & Documents
- Catalog Flowserve Durco BTV-2000 Brochure Download
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About brand
Flowserve is the American flow control company for pumps, valves, mechanical seals and valve automation, known through brands such as Durco, Worthington, Byron Jackson, Valtek, Limitorque, Worcester, Logix and Argus. It was formed on 22 July 1997 by the merger of equals of Durco International and BW/IP, whose heritage reaches back to Simpson & Thompson (1790) and Byron Jackson (1872). Flowserve Corporation is headquartered in Irving, Texas, and listed on the New York Stock Exchange.
Seven Star LLC sources and supplies Flowserve pumps, seals, control valves, ball valves, actuators and positioners for process plants in Oman, working from the nameplate data and the manufacturer's documentation.
Flowserve company profile
| Formed | 22 July 1997, merger of Durco International and BW/IP |
|---|---|
| Heritage companies | Simpson & Thompson, later Worthington Simpson (1790); Byron Jackson (1872); Duriron foundry, later Durco (1912) |
| Headquarters | Irving, Texas, USA |
| Ownership | Flowserve Corporation, public company (NYSE: FLS) |
| Product families | API and ANSI process pumps, Durco and Worcester ball and plug valves, Durco TX3 triple-offset and Valtek butterfly and globe control valves, Limitorque electric actuators, Logix positioners, mechanical seals |
Milestones
- 1790: Thomas Simpson founds Simpson & Thompson, a predecessor of Worthington Simpson pumps.
- 1872: Byron Jackson is founded, a root of BW/IP.
- 1912: The Duriron foundry, later Durco, is launched.
- 1997: Durco International and BW/IP merge on 22 July to form Flowserve, listed on the NYSE as FLS.
Flowserve product families listed here
Flowserve pumps on this page are the Durco Mark 3 ANSI process pump and the ECPJ vertical sump pump built to API 610 type VS4. Sealing products are the ISC2 cartridge mechanical seal to API 682 and DuraClear barrier fluid for dual seal systems. Flowserve valves include the Valtek Mark One globe control valve, Argus floating and trunnion-mounted ball valves (EK71, FK79, FK76M) and Durco Microfinish ball valves. Automation is covered by Limitorque MX and L120 multi-turn electric actuators, the Rotadisk RD and RDF pneumatic actuator and the Logix 3800 digital positioner.
Where Flowserve equipment is used
Mark 3 pumps handle acids, caustic, solvents and utilities in chemical and petrochemical units. VS4 sump pumps drain pits and collection tanks. Valtek control valves and Argus ball valves are found in refining, gas processing, power and desalination, and Limitorque actuators operate gate and globe valves on pipelines, tank farms and water networks across the GCC.
Flowserve products we list
Ordering Flowserve parts: what we need
The serial number on the nameplate is the key to Flowserve records for a pump, valve or actuator. Please add the following by product type:
- Pumps: size and model, impeller diameter, materials, seal arrangement, and the part name and item number from the sectional drawing
- Mechanical seals: seal type and size, drawing or part number, materials code, pumped fluid and flush plan
- Valves: size, pressure class, body and trim materials, end connections, and the actuator and positioner model
- Limitorque actuators: unit size, order and serial number, supply voltage, wiring diagram number
Facts checked against Flowserve's SEC filings and published company histories, October 2026.
Browse Flowserve products by category: Control Valves, Pumps, Valve Actuator, Valve Positioner.
FAQ
Questions about the Flowserve Durco BTV-2000 Lined Butterfly Valve
Answers from our engineering team on installation, compatibility and integration.
01What sizes does the Durco BTV-2000 cover?
Sizes run from 2 in (50 mm) to 24 in (600 mm) in wafer or lug bodies.
02What are the pressure and vacuum ratings?
The valve is rated from full vacuum to 150 psi (1,034 kPa), with DIN PN10 and PN16 versions available.
03What temperature limits apply?
PTFE liner with PFA disc may be specified to 177 °C (350 °F); UHMWPE liner and disc to 93 °C (200 °F). Above 180 °F is reviewed.
04Which standards does it meet?
The brochure says it meets MSS SP-67, API 609 and ISO 5752/20 design criteria.
05Does the stem seal need adjusting?
No. The live-loaded triple-seal design uses a spring to keep constant preload.
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