22 Nov

What is a demulsifier?

It’s a substance that dissolves emulsions (that is, to separate the two phases). Whether an emulsion is water-in-oil or oil-in-water determines the sort of demulsifier that should be used. Demulsifiers are used to treat generated hydrocarbons and in the chemical analysis of oil and synthetic muds. Why are demulsifiers important? They are frequently employed in […]
19 Oct

Pour Point Depressants – keeping the oil flowing

Charles Wemyss, Litre Meter’s CEO and pour point expert explains why measuring pour point depressants (PPD) can keep oil flowing. What is Pour Point? First off, what is pour point? It’s the lowest temperature at which liquid is still pourable. There is an ASTM test (D-97) which defines the pour point as when the oil […]
16 Jun

Extending the flow meters calibrated range

It’s not an uncommon request. When the enquiry comes in, our client thinks the require range will be 1 to 10, but once installed, it’s clear it should have been 2 – 20. What do we do then? First step It’s unlikely the range can be extended beyond the flow meter maximum rate flow rate. […]
16 Jun

What is Linearisation?

what is Linearisation, and why do you need it? We take a look into the world of Linearisation and why you need it for your flow measurement solutions. Linearisation is a process that enhances the accuracy of any repeatable flow meter. A standard calibration of our VFF flow meter will involve 10 calibration points. These […]
24 May

A history of Subsea flow meters

Over the years’ we at Litre Meter have honed our core subsea flow meters with longevity and easy installation in mind. From our first custom design Pelton Wheel to our VFF range, our Subsea flow meters are manufactured to your design requirements. Read about our Subsea flow meter journey below. Pelton Wheel flow meter – […]
19 Apr

Case Study: Custom Pelton Wheel Flow Meter Designs

Litre Meter have manufactured pelton wheel flowmeters since 1975.  They are based on a light-weight, low inertia, plastic rotor spinning on jewelled bearings and monitored by a no-drag pick off. The standard range covers many flow rates, materials, end connections and pressure ratings.  The wide rangeability and compactness lends their design to a multitude of […]
19 Apr

What’s in a typical flow meter datasheet?

A typical datasheet relating to a flowmeter is given as below – this one is based on a NORSOK format: This one is for the same meter but based on an ISA format (a version used by Litre Meter which uses S20.25 as it’s base): Norsok: This is an approximate layout, typified by NORSOK. 1 General 1.01 […]
19 Apr

What’s the best chemical injection flow meter?

Litre Meter VFF rotary piston positive displacement flowmeters have proven to be the foremost solution for chemical injection flow metering applications. They are able to handle the wide range of flows at pressures from a few bar up to 10,000 and 20,000 psi (690, 1,380 bar) and higher. The FlowPod instrument has been developed after feedback […]
06 Apr

Chemical Injection Flow Meters

Chemical injection is the process designed to assist in the production of oil where various chemicals are injected into the crude oil to provide a degree of protection.  For example; a scale inhibitor will prevent the build-up of scale on the pipes and fittings used to transport the oil on its journey to the refinery.  […]
21 Feb

High Pressure Flow Meters – How Do We Test Them?

At Litre Meter we are industry leaders in producing high pressure flow meters. But how do we ensure the pressures our customers request, can be safely achieved? Our Production Manager Timothy Smith looks at how. Pressure Ratings Generally, the pressure ratings for our flowmeters depend on the rating of the connection. Within our standard line […]