Floating and trunnion-mounted ball valves for oil and gas
Floating and trunnion-mounted, full and reduced bore. API 6D, fire-safe and NACE, ½" to 48".
Overview
Ball valves give bubble-tight shut-off with a quarter turn, which makes them the standard isolation valve in oil and gas production, gas transmission and most process plants. Floating-ball designs cover small sizes and lower classes; trunnion-mounted designs carry the pressure load on bearings and are specified for large sizes, high classes and pipeline duty.
We supply ball valves to API 6D and API 608 from European and Korean manufacturers held in stock in Dubai, including fire-safe designs certified to API 607 and API 6FA, anti-static and blow-out-proof stems, double block and bleed configurations and NACE MR0175 sour-service materials.
Trunnion valves can be supplied with gear operators, bare stems to ISO 5211 for actuation, extended stems for buried service, and drains, vents and sealant injection fittings.
See how a ball valve works in the interactive Valve Lab.
Typical applications
- Wellhead and gathering systems
- Gas transmission and distribution pipelines
- Gas processing, LPG and LNG facilities
- Refinery and petrochemical isolation
- Pig launcher and receiver stations
- Emergency shutdown (ESD) with actuators
Specified in oil & gas fields, petrochemicals, refineries.
Specifications
| Designs | Floating · trunnion-mounted · top entry · side entry (2- and 3-piece) · fully welded |
|---|---|
| Bore | Full bore · reduced bore |
| Sizes | ½" – 48" (DN15 – DN1200) |
| Pressure classes | ASME 150 · 300 · 600 · 900 · 1500 · 2500 |
| Body materials | A216 WCB · A352 LCC · A105 · LF2 · A351 CF8M · F316 · duplex · super duplex · Inconel-clad |
| Seats | PTFE · RPTFE · PEEK · Devlon · metal-to-metal |
| Design standards | API 6D · API 608 · ISO 17292 · ASME B16.34 · BS 5351 |
| Fire-safe / sour | API 607 · API 6FA · NACE MR0175 / ISO 15156 |
| End connections | RF · RTJ · butt weld · socket weld · NPT · hub ends |
Sizes, classes and materials listed are typical of our stock and supply programme. Other combinations are quoted against your specification. See what is usually ex-stock.
Specifying the right ball valve
Floating designs are economical up to roughly 2" Class 600, 4" Class 300 or 6" Class 150; above that, seat loads rise and a trunnion-mounted valve is the correct choice. For pipeline and ESD duty, specify API 6D with double block and bleed, a body vent and drain, and an anti-blow-out stem. For gas with H₂S, state NACE MR0175 / ISO 15156 on the RFQ; it changes bolting, trim hardness and certification. Fire-safe service needs API 607 (soft-seated) or API 6FA (API 6D) with the manufacturer's test certificate, not a statement of conformity.
Seat material sets the service limits: PTFE to about 200 °C, RPTFE and PEEK for higher pressure and temperature, Devlon for cryogenic and high-cycle duty, and metal-to-metal seats for abrasive, hot or dirty service. Choose full bore where the line is pigged or pressure drop matters, reduced bore where it does not and cost or weight does. Side-entry two- or three-piece bodies are serviceable in line; top-entry bodies allow seat replacement without removing the valve from the pipeline.
What to send us for a fast quote
- Size, bore (full or reduced) and class
- Body and trim material; seat material
- End connection and face: RF, RTJ, BW, hub
- Design standard: API 6D or API 608; fire-safe and NACE
- Operator: lever, gear, bare stem to ISO 5211, actuator
- Documents and delivery location
Why tenders get rejected, and how we avoid it
Pakistani operators routinely disqualify bids that lack the manufacturer's API 6D licence copy or an authorisation letter. We supply both with the quotation, with the manufacturer named and the country of origin confirmed on the certificates, together with the fire-safe test certificate where the specification calls for API 607 or 6FA. More on API licences, authorisation letters and certificates.
Brands available
Supplied from the manufacturers below, through our sister company Al Hakim in Dubai. Country of origin is confirmed on the certificates of every supply.
Documentation supplied
EN 10204 3.1 material test certificate traceable to heat number, API 598 pressure test report per serial number, certificate of origin and manufacturer's certificate of conformity, with NACE, fire-safe, 3.2 and third-party inspection documents where the order requires them. What every document in our package covers.
Frequently asked questions
When do I need a trunnion-mounted ball valve instead of floating?
Floating valves push the ball against the downstream seat using line pressure, so torque and seat load rise with size and pressure. Above roughly 2" Class 600, 4" Class 300 or 6" Class 150, specify trunnion-mounted.
Are your ball valves fire-safe certified?
Yes. We supply valves with API 607 (soft-seated) and API 6FA (API 6D) fire-test certification from the manufacturer, and include the certificate in the documentation package.
Can you supply double block and bleed ball valves?
Yes, both as DBB trunnion valves with a body bleed and as compact instrument DBB valves from Oliver Valves.
API 6D or API 608: which one should the specification say?
API 6D for pipeline valves: trunnion or floating, with double block and bleed, vent and drain, and the fire-safe test to API 6FA. API 608 for process plant ball valves, flanged or threaded, Class 150 to 600, fire-tested to API 607.
Full bore or reduced bore?
Full bore where the line is pigged, where pressure drop or erosion matter, or where the specification says so. Reduced bore (one size smaller) saves cost and weight on isolation valves in process lines where a small extra pressure drop is acceptable.
Related products
For compact instrument double block and bleed valves, see our instrumentation valves; for ball valves supplied with actuators, limit switches and solenoid packages, see actuated valves.
Actuated valves
Valves with electric or pneumatic actuators, function-tested as complete packages, including ESD.
Sizes, classes and brands
Check valves
Swing, dual plate, piston and tilting-disc designs. API 594, API 6D and BS 1868, ½" to 48".
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Instrumentation valves
Needle valves, manifolds, monoflanges and double block and bleed, up to 10,000 psi, 316 SS to Inconel.
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Pipe fittings
Butt-weld elbows, tees and reducers to B16.9; forged socket-weld and threaded fittings to B16.11.
Sizes, classes and brandsRequest a quotation for ball valves
Send size, class, material, quantity and required documents on WhatsApp or through the form. We reply within one working day with availability and lead time.