TPi November 2013

products & developments

Pilot-operated safety valve Protection from over pressure is a key safety aspect for operators of process plants. Large and complex plants, for example in the chemical or oil and gas industries, require a broad range of safety valves for various pressures, temperatures and media. Integrated tubing between the main valve and the pilot valve reduces the danger of freezing or damage, and a backflow preventer is fitted as standard.

For industrial processes with corrosive media, Leser offers a high pressure pilot- operated safety valve with a full nozzle provided with the same lead-times as the standard semi nozzle version. Another improvement was achieved in making seals more resistant to explosive decompression – an important factor in petrochemical and other applications with high pressures. Leser uses a material that reduces diffusion of the medium into the soft seal. This results in longer maintenance intervals for the valve. The expansion of the operating range of Leser pilot-operated safety valves for pressures up to 6,710 psig (426 bar) is scheduled for release in 2014. At that time, the Leser product range will cover the entire pressure spectrum as defined by API 526. Leser GmbH & Co KG – Germany sales@leser.com www.leser.com

In addition to the higher permissible pressures, Leser offers a number of innovative product configurations for industry-specific requirements. The new valve for pressures up to 3,705 psig (256 bar) covers outlet flange ratings class 300x300 and 600x300, which go beyond API 526 but are often required in plants. For high pressures as well as high temperatures, Leser offers a version with a stellited disc. With this method, the sealing surfaces are especially hardened, which offers a high functional tightnessevenafterseveralvalveopening cycles. Higher tightness requirements at especially low temperatures can be fulfilled with the new sealing plate made of PEEK or PTFE inside the main valve.

Leser has expanded the operating range of its High Efficiency product group with a new pilot-operated safety valve (POSV) for pressures from 102 to 3,705 psig (256 bar). This valve was presented for the first time at Valve World Expo Americas, and high pressure pilot operated safety valves up to class 1500/PN 250 can be ordered as of October 2013. “This makes Leser one of the few suppliers offering a wide range of pilot- operated and spring-loaded safety valves and an interesting supplier for large industrial projects,” said Steve Usina, president of Leser USA. Many different operational requirements such as higher tightness, explosive decompression, high capacities or the protection against back pressures can be addressed with the high pressure pilot-operated safety valve. The valve also meets API 526 specifications. “With short lead-times of four weeks and a robust design, Leser pilot-operated safety valves are a safe choice for plant operators,” added Mr Usina. “Leser POSVs are used by leading companies around the globe and provide a reliable and economical solution for many applications.”

Steel pipe from China Hebei Xingfeng Steel Pipe Co, Ltd is a manufacturer and exporter of steel pipe, specialising in galvanised and non-galvanised ERW/LSAW steel pipe, SMLS steel pipes, square/rectangular hollow section and scaffolding tubes. The pipes’ ends can be threaded or grooved, and the surface treatment can be black painted, galvanised, 3PE, FBE or oiled.

The company’s production range includes seamless steel pipe from 10.3 to 762mm OD ( 1 / 8 " to 30"); ERW steel pipe from 21.3 to 219.1mm OD ( 1 / 2 " to 8"); and LSAW steel pipe from 219.1 to 1,420mm OD (8" to 72"). Hebei Xingfeng Steel Pipe Co, Ltd – China www.hbxfgy.com

International Tube & Conduit Company Ltd.

• British Standard Conduits BS31 / BS4568 • Electrical Metallic Tubing EMT • Intermediate Metal Conduit IMC

• Rigid Metal Conduit

RMC

• Flexible Conduit

FC

• Fittings

T: +966 2 6060275 - F: +966 2 6061095 - P.O. Box 10374 Jeddah 21433 - KSA E-mail: sales@itcc-group.com - www.itcc-group.com

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November 2013 Tube Products International