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Valves · BS & API Certified

Three way and multiport ball valves

Three way and multiport valves were developed initially for use within our own duplex filter assemblies and are now supplied as a product line in their own right. They are designed, manufactured and tested in accordance with BS 5251 Section One, BS 6755 Part 1, API 598 and API 6D. L port configuration is applied for diverting between two outlets, T port for mixing or for simultaneous supply to two lines. Both are available lever operated, gear operated or actuated.

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Flair three way ball valve fitted on a duplex filter assembly Photograph of completed unit
Three Way & Multiport Ball Valves
Construction & Types

Two port patterns, three ways to operate

A three way ball valve routes, diverts or mixes flow between two or three connections through a single ball with an L or T shaped bore. Selected against the port pattern the routing requires and the operating method the installation calls for.

L Port Diverting duty

Connects one inlet to one outlet at a time, with the third port shut off. Applied for diverting flow between two outlets or two chambers, such as changeover on a duplex filter.

T Port Mixing / dual supply

Permits mixing two inlets into one outlet, or supplying two outlets simultaneously from one inlet. Applied where flow must be combined or split rather than simply diverted.

Lever & Gear Operated Manual duty

Lever operation suits smaller sizes and infrequent use; gear operation reduces the torque needed to turn larger valves by hand.

Actuated Remote / automated duty

Pneumatic or electric actuation for remote operation, frequent cycling, or integration into an automated control sequence.

Specification

Standard range

Where a stated range does not cover a particular requirement, equipment is engineered to the customer specification.

Size range 15 mm to 300 mm
Port pattern L port and T port, four way on request
Design and test standards BS 5251 Section One, BS 6755 Part 1, API 598, API 6D
Pressure rating Class 150, 300 and 600
Body construction Two piece or three piece
End connections Flanged, screwed, socket weld or butt weld
Seat material PTFE, RPTFE, PEEK or metal seat on request
Body materials Carbon steel, SS 304, SS 316, alloy on request
Operation Lever, gear operator, pneumatic actuator or electric actuator
Options Locking device, limit switch, ISO 5211 mounting pad, extended stem
Materials of Construction

Grades routinely handled

Carbon Steel SS 304 SS 316 PTFE / RPTFE Seats Alloy on Request

Carbon steel suits standard utility and process duty; stainless is specified for corrosive fluids or where product purity matters. Seat material is selected against the process fluid and temperature, with PEEK or a metal seat available on request for higher temperature or abrasive service.

Applications

Where these units are installed

Changeover duty on duplex filters and strainers Multiport service on pressure sand and activated carbon filters Diverting and mixing service on process and utility lines Sampling and drain manifolds
FAQ

Common questions

An L port valve diverts flow between two outlets, connecting one inlet to one outlet at a time, with the third port always shut off in any given position. A T port valve permits mixing two inlets into one outlet, or supplying two outlets simultaneously from one inlet. The port pattern is selected against how the flow needs to be routed, not interchangeably.
They were developed initially as the changeover valve within our duplex filter and duplex strainer assemblies, where the valve routes flow between the two chambers on changeover. They are also supplied for multiport service on pressure sand and activated carbon filters. See our Duplex Filters and Pressure Sand and Activated Carbon Filters pages.
A lever operator is turned directly by hand and suits smaller sizes and infrequent operation. A gear operator reduces the effort needed to turn larger valves, useful where the torque required exceeds what a lever can comfortably provide. Pneumatic or electric actuation is specified where the valve must be operated remotely, frequently, or as part of an automated sequence.
Two piece bodies are more compact and economical; three piece bodies allow the centre section to be removed for seat and seal maintenance without disturbing the pipeline connections. Three piece construction is preferred where in-line maintenance access is a priority.
PTFE and RPTFE (reinforced PTFE) are standard, suiting most process fluids and temperatures. PEEK or a metal seat can be supplied on request where the duty involves higher temperature, abrasive service, or fire-safe requirements. Confirm your fluid and temperature and we will recommend the seat material.
Yes. Valves are manufactured and tested in accordance with BS 5251 Section One, BS 6755 Part 1, API 598 and API 6D, and each valve is shell and seat tested before dispatch.
Yes. A locking device to secure the valve in a fixed position, a limit switch to signal valve position to a control system, an ISO 5211 mounting pad for actuator fitment, and an extended stem for insulated or buried lines can all be supplied. Specify these requirements at enquiry stage.
Yes, on request, in addition to the standard L port and T port three way configurations. Advise us of the routing you require and we will confirm the port pattern and configuration.
Enquiry

Request a quotation for Three Way & Multiport Ball Valves

Give us the line size, flow rate, fluid and operating conditions and we will engineer directly against them. Most enquiries are answered the same working day.