The elastic memory of the diaphragm is time dependant and, if left open for long periods, may result in slow closure of the valve under reverse flow with subsequent leakage. DNV-GL Type Approved Product Classification, verification, risk management, and technical advisory to the maritime industry on safety, enhanced performance, fuel efficiency, etc. As a classification society, DNV GL sets standards for ships and offshore structures – known as Class Rules. They comprise safety, reliability and environmental requirements that vessels and other offshore mobile structures in international waters must comply with. DNV GL is authorized by 130 maritime administrations to perform certification or verification on their behalf.

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The Kramoja region is located in northeastern Uganda and is classified as one of the poorest regions in the world. Combination Water Meters Combination water meters comprises of a bulk Woltmann insert and a low-flow Volumetric insert or meter, flow is diverted between them by a by-pass valve that is set at a predetermined flow rate. This allows the combination meter to have a very large measurement range. Multi-Jet Warm Water Meter Multi-jet meters use multiple ports surrounding an internal chamber to create multiple jets of water against an impeller, whose rotation speed depends on the velocity of water flow. For best accuracy, they should be installed horizontally. Essentially for ‘foot valve’ applications where single flange bolting to the end of a pipe is necessary. May also be used for bolting to the sides of tanks or bulkheads. Size range 40 mm (1.5 in) to 200 mm (8 in). For many years the Norval Non-Return principle has been very successful throughout most industrial sectors. During discussions with engineers in the Brewing, Soft drinks and Food Industries we established that the Norval principle could be developed to overcome problems encountered with Non-Return Valves in CIP systems.Elster Water Metering (Kent Meters) Elster Water Metering (formally Kent Meters and now part of Honeywell) are an industry leader in the manufacture of water meters, which includes high accuracy mechanical meters, fully electronic water meters and Smart metering solutions for residential, commercial and industrial sectors. Volumetric Positive Displacement Meter Based on the volumetric rotary piston measurement principle, these meters offer the very highest levels of reading accuracy, even at the lowest flow rate. Optimum accuracy is maintained whether the meter is installed horizontally, vertically or on an incline.

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Measurement Instrument Directive Compliant Water Meter Meters conform to the European Council Directive on Measurement Instruments which supersedes the Metrological Classes A, B, C etc. The permissible error limits are regulated across Europe by the MID, water meters may measure with an accuracy of +/-5% in the lower flow range and +/-2% in the permanent load range. For large bore installations we offer the Norval valve in modular form, in sizes 250 mm – 600 mm diameter. Non-electrical devices and components group II ATEX II 2 GD c T2 Non-electrical Valves EC-Certificate is issued according to Article 8(1) b) ii) of Council Directive 94/9/EC for equipment and protective systems intended for use in potentially explosive atmospheres (ATEX).M-Bus (Meter-Bus) Protocol Communications Output M-Bus (Meter-Bus) is a European standard (EN 13757-2 physical and link layer, EN 13757-3 application layer) for the remote reading of water, gas and electricity meters. The M-Bus interface has two wires, making it an easy and cost-effective AMR solution. A radio variant of M-Bus (Wireless M-Bus) is also specified in EN 13757-4. Woltmann Turbine Helical Vane Meters Woltmann meters comprises of a rotor with helical blades inserted axially in the flow, much like a ducted fan; they can be considered a type of turbine flow meter. They are commonly referred to as helix meters and are usually used to measure bulk flows. Electromagnetic Water Meters The Electromagnetic water meter (Mag Meter) does not have any moving parts and is ideal for potable and wastewater applications or any dirty liquid which is conductive or water based. A magnetic field is applied to the metering tube, which results in a potential difference proportional to the flow velocity. ISO5211 Pad Mount for Actuator Operation The top flange and drilling to ISO5211 specifications offer the widest possible selection of actuation options, as well as direct mount of pneumatic actuators and accessories.