TPi November 2014

Valves , Fi t t ings & Flanges

Large gate valves for H2S rich sewage line

increasing pressure loss and blockage.

Ekoval is a Turkish manufacturer and supplier of industrial valves and pipeline fittings, with a wide product range covering water, sewage, water treatment and HVAC systems. The company has successfully delivered large size gate valves from DN700 to DN1500 for an H2S rich sewage line near an oil refinery in Netherlands. The project involved the replacement of the butterfly valves with metal seat gate valves. The objective was to increase the energy efficiency of the pipeline with the wider passage of the gate valves, and to avoid fibres blocking butterfly valve discs. Butterfly valves in an open position still have the obturator in the middle of the flow. In sewage systems, residue and fibre can collect around the butterfly valve disc, and over time this can cause

Replacing butterfly valves of DN1500 size and ISO 5752 Series 14 short face-to-face dimension inside quite a narrowvalve chamber

Ekoval gate valves for sewage

robust-design bronze seats and wedge nuts, and high-grade stainless steel used in the stem, bypass, drain and air release valves. Ekoval can also provide other types of valve, including knife gate valves, check valves, air valves, butterfly valves, and dismantling joints suitable for infrastructure projects. Ekoval Valve Company – Turkey export@ekoval.com www.ekoval.com

was one of the challenges. This required a special design in the gate valves to achieve high-pressure resistance in short face-to-face dimensions. Ekoval designed strong body construction and passed third party inspection for six DN1500 gate valves tested at 9 bars hydrostatic body resistance test and 6.6 bars hydrostatic seat tightness test with Rate A sealing.

Other details applied by Ekoval to meet the requirements of the project included

Erne stocks Duplex and Super Duplex Erne Fittings, a supplier of butt-weld fittings, stocks elbows, tees and reducers from ½" to 8" in UNS-S31803/ S32205, as well as the same products from ½" to 6" in UNS-S32750, with wall thicknesses S10S, S40S and S80S. All other material grades up to 6" XXS are available upon request. refineries, oil and gas plants, and other demanding applications. The company’s production range includes elbows, tees and reducers from 21.3 to 1,016mm (½" to 40"), and wall thicknesses up to 50mm, made of alloyed, unalloyed, stainless steel and exotic materials for the approved market. With four production sites across Austria, Germany and Saudi Arabia, and a fully automated high- rack shelving warehouse of around The company provides safe pipe fittings for permanent welds for use in the construction of power stations,

10,000 storage spaces and over 3,000 items, Erne Fittings ensures availability of more than 95 per cent for the entire stock programme. Alongside the actual products, details such as stock information, binding delivery times and prices can be viewed by the customer at all times.

Erne Fittings GmbH – Austria office@ernefittings.com www.ernefittings.com

Trunnion ball valve Val-Matic’s QuadroSphere ® trunnion ball valves are suited to meet many of the demanding services found in the geothermal industry. They are used to isolate fluids such as brine, gas and steam, and are used in gathering line systems, as master valves on brine wells, and in blow-off and vent and drain services. The QuadroSphere trunnion mounted ball has lip edges that clean the seating surfaces whenever the valve

is operated. The recessed surfaces on the ball provide for self-flushing of the inner body to prevent scale and solids build up, which makes it suitable for many applications in the geothermal industry. Val-Matic Valve & Manufacturing Corp – USA valves@valmatic.com www.valmatic.com

Quadrosphere trunnion ball valve from Val-Matic

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November 2014 Tube Products International