Products
Differential pressure flow elements, orifice fittings, pressure reducing devices, package solutions and the process accessories around them. Every item is sized and manufactured against your line and service data, not picked from a stock list.
Orifice Plate Flow Elements
Plates and the assemblies that hold them. Sized to the applicable standard, marked to the project, and supplied with calculation sheet and material certificate.
Datasheet INK-DS-01 →Two decisions before the calculation
How the plate is held in the line, and what the plate itself looks like. Two short tables that narrow the range before you send us the service data.
Single Orifice Plate
Standard and specialised orifice platesStandalone plates for existing orifice flanges or fittings: paddle-type for a flange union, handle-free for a fitting. Bore position, inlet profile and flow conditioning are independent design choices — a plate can have a concentric bore and a square-edge inlet at the same time.
Single Orifice Plate
Machined to the calculated bore, marked to the project, supplied with the sizing calculation and material certificate.
Details →Bore and inlet profiles
Section through the plate — confirmed by calculation
Concentric square-edge
Clean single-phase liquid, gas and steam
Quadrant edge
Viscous, lower Reynolds number
Conical entrance
Viscous at the low Reynolds end
Eccentric bore
Entrained gas, liquid or solids
Segmental opening
Contaminated fluids, larger passage
Multi-hole (conditioning) plate
Limited straight pipe length
Orifice Flange Union
Standard and process-specific assembliesAn orifice plate installed between a matched pair of orifice flanges with pressure tappings, studs, nuts, gaskets and jack screws. Four construction variants, then configured to the service.
Orifice Flange Union
Standard Union Variants
With Weld-On Shut-Off ValvesRoot valves fitted 
With Valves and Condensate PotsSteam and condensing service 
Orifice Flange WeldmentSupplied as one spool Variants, materials and ratings → Compact Orifice
Close-coupled DP flow assembliesA compact-body element that carries its own pressure tappings — through tapping holes or a tapping groove in the plate carrier itself. The measurement is taken without machining the flanges, so standard line flanges can be used and replaced without touching the element.
Compact Orifice Assembly
The pressure is taken from tapping holes or a tapping groove in the element body rather than from drilled orifice flanges. Standard flanges can be used, changed or re-rated without affecting the measurement, and the element is removed as one part.
Details →
Integral manifold and DP transmitter
The element and its pressure-tapping body can be supplied as a single factory-assembled unit with an integral manifold interface, ready to take a DP transmitter directly — no external impulse lines to route, support or heat trace.
Also available on the averaging pitot tube.
Small Bore Meter Run
Engineered meter runs for small-line flow measurementAn orifice element combined with controlled upstream and downstream meter-run sections, so the bore, alignment and tapping positions are set in the workshop rather than in the field.
Designed to ASME MFC-14M
Small Bore Meter Run
Supplied in two constructions: a removable flanged assembly with annular pressure chambers around the bore, or a welded meter run with the tapping structure permanently integrated and fewer field interfaces.
Orifice Fittings
Serviceable fittings installed in the line. They take the same plates as the rest of the range — the difference is how you reach them. Also available as a complete meter run.
Datasheet INK-DS-02 →Single Chamber Orifice Fitting
Built in two internal arrangements according to line size, with weld × flange ends as standard and flange × flange or weld × weld on request. Takes the same plates as the rest of the range.
One plate-holding and service chamber. The construction simplifies plate access, but the process section must normally be isolated and depressurised before the plate is removed.
Dual Chamber Orifice Fitting
Plate carrier raised into the upper chamber through a rotary valve, turned with the operating wrench, with a position indicator and valve seats. A double block and bleed structure is available on request.
A lower measurement chamber and an upper service chamber separated by an isolation mechanism, intended to support plate inspection or replacement while maintaining process continuity. What is possible in practice depends on the pressure rating, the fitting design and your approved operating procedure.
Custody Transfer Meter Runs
Complete metering spools where the measurement is the commercial transaction. Upstream and downstream sections bored and aligned in the workshop, conditioning set at the required spacing.
Datasheet INK-DS-03 →
Custody Transfer Meter Runs
Primary element
Orifice Plate Meter RunPlate between orifice flanges 
Single Chamber Fitting RunLocal outage to change a plate 
Dual Chamber Fitting RunPlate change under pressure Details, materials and ratings → Flow Conditioners and Straighteners
Installed upstream of the element where the available straight run is shorter than the standard asks for: perforated-plate conditioners and a tube bundle straightener.
Flow conditioner overview →
Flow Conditioners and Straighteners
Zanker Flow Conditioner Variants
NEL (Spearman) Flow ConditionerPerforated plate type 
Laws Plate ConditionerRaised face or RTJ 
19-Tube Bundle Flow StraightenerTube bundle in its spool Variants, drawings and materials → Venturi Tubes and Flow Nozzles
Low permanent pressure loss and high-velocity service: classical venturi tubes, venturi nozzles and ISO 5167-3 flow nozzles, flanged, wafer or welded.
Datasheet INK-DS-04 →
Venturi Tube Flow Element
Machined & fabricated convergent
Details →
Venturi Nozzle
Nozzle profile with a divergent outlet cone
Details →
Flow Nozzles
ISA-1932 · long radius · throat tap
Details →
Wafer Flow Nozzle Assembly
Nozzle held between line flanges
Details →
Welded Nozzle
Butt weld ends · no gasket joint
Details →Cone and Wedge Meters
Inline elements for short straight runs (cone) and for dirty, viscous or slurry service (wedge).
Pitot Tubes
Insertion elements for large lines and ducts: averaging, grid type and retractable.
Pitot tube overview →
Pressure Reducing Devices
Single and multi-stage restriction orifices, spectacle orifices and attenuation plate sets, each sized for a set pressure drop. Not measurement devices: they take pressure out of the line, with noise and cavitation as the design constraint.
Datasheet INK-DS-06 →
Single Stage Restriction Orifice Plate
One plate · fixed pressure drop
Details →
Multi-Stage Restriction Device
Staged drop · cavitation and noise control
Details →
Attenuation Plate Set
Multi-hole set · downstream of control valves
Details →
Spectacle Restriction Orifice
Multi-hole plate one side · ring the other
Details →Package Solutions and Skids
Complete assemblies engineered against your P&ID, built on one frame and tested before dispatch — delivered ready to tie in.
How a package is engineered →
Process Accessories
The parts that make a measurement point work in the field: condensate chambers, level gauges and level tubes, plate holders, thermowells and valve manifolds. Each is specified against the process conditions it works in.
Accessories overview →
Condensate Chamber
Seal pots for steam and hot condensate
Details →
Level Gauges & Level Tubes
Reflex, transparent and standpipe assemblies
Details →
Orifice Plate Holder (Plate Carrier)
Plate carriers and seals for orifice fittings
Details →
Thermowell
Bar stock or fabricated, to the specification
Details →Valve Manifold
For pressure and differential pressure transmitters
Details →Not sure which element fits your line?
Send the pipe size, flow rate, pressure, temperature and medium. We come back with a sized element, a calculation sheet and a price.