L&T Valves Limited

Sharjah, United Arab Emirates

L&T Valves offers a range of customised SIL3-capable High Integrity Pressure Protection Systems (HIPPS) for over-pressure protection

In industrial plants, in case of over-pressurisation, the gases released are primarily flared. Flaring and venting of flammable gases pose health and safety hazards and constitute a significant threat to the environment.

High Integrity Pressure Protection System (HIPPS) is a Safety Instrumented System (SIS), which by definition is a distinct, reliable system, used to contain catastrophic over-pressurisation and prevent the release of toxic, flammable or explosive chemicals.

HIPPS protects downstream equipment by shutting-off the source of over-pressure within seconds, and is designed to offer at least the same reliability as a safety relief valve or flare system.

• IEC 61511
• IEC 61508

• Valves - Ball or Butterfly
• Actuators - Pneumatic, Hydraulic or Electro-hydraulic
• Pressure Transmitters
• Logic Solver Solid state or Programmable Electronic Systems (PES)
• High Integrity Manifold Block

• Final control element (1oo2)
• Solenoid valves (1oo2)
• Pressure transmitters (2oo3)
• Logic SolverRedundancy on I/O Cards, Relays, Communication and Power Module

L&T Valves is a strategic partner in the nations defence and aerospace programmes. In the last three decades, the company has developed many mission-critical flow-control solutions for classified projects.

The continued successes in defence and aerospace domains bear witness to the companys capabilities in technology management, new product design and precision manufacture.

The products are designed for long design life by a dedicated team of experts. Finite Element Analysis (FEA, Structural, Thermal and Shock) and Computational Fluid Dynamics (CFD) are employed to fine-tune the designs. Rigorous prototype development and functional qualification tests ensure that the designs are translated into high performance products.

• Shock test
• Vibration test
• Flow test
• Helium leak test
• Endurance test

The products are manufactured in an access-controlled precision manufacturing centre equipped with:

• CNC Machining Centres
• CNC Horizontal Boring Machines
• Special purpose
• Specialised Welding Machines

The products are assembled in a 10K Clean Room, and cleaned and packed using a customised protocol to ensure product integrity is maintained during transit and storage.

The DeFlo VSD integrates the precision and simplicity of a Control Valve into a Desuperheater to attain maximum turn-down, responsiveness and accurate control.

For the maximum efficiency the DeFlo VSD atomizes the cooling fluid at the vena contracta just downstream of the throttling point right at the injection point. The special design of the spray retainer ensures a hollow swirling cone pattern of the atomized fluid.

The total cooling water differential pressure is available at the throttling point hence optimizing the atomizing effect even further.

The integrated DeFlo VSD:

• No Additional cooling water control valve required
• Class V shut-off available
• Probe installation which does not influence the piping geometry or velocity of the gas
• Lower maintenance cost: No additional valve to service, integrated lightweight & compact high performance actuator.