Navy & Maritime

GLSV is a value-added supplier, providing complete, customer-specific solutions for the Navy and marine markets. As a vertically integrated supplier, all of our engineering, design, and manufacturing is done in-house, allowing us to be more efficient and responsive to our customers.

We currently supply shock and vibration-qualified exhaust silencers and intake products for multiple shipbuilders’ yards, shock-qualified electromechanical equipment, and NAVSEA weld-qualified products. In addition to intake, exhaust, and silencer products, we also manufacture and supply large fabricated structures, deck equipment, fans, and acoustic engineering services.

From concept development to fully engineered, qualified, and manufactured systems – GLSV has a deep history of supporting the North American defense market. Our broad marine experience also includes structural design and analysis of a launch handling and recovery crane for the Littoral Combat Ship (LCS-5), stern door and ramp design and analysis for the LCS-5, shock and vibration qualification of multiple shipboard components, and R&D efforts for launch and recovery systems.

Exhaust silencers

Independence-variant Littoral Combat Ship

GLSV has supplied ship service diesel generator (SSDG) exhaust silencers to Austal USA for the Independence-variant LCS ships. GLSV developed a turnkey solution for these silencers – a fully shock hardened and qualified design which was optimized to meet all acoustic and backpressure requirements. GLSV performs all of the manufacturing in-house, and all fabrication and welding in accordance with NAVSEA S9074-AR-GIB-010-278 requirements. Non-destructive testing and inspection is performed by our in-house Certified Welding Inspectors (CWI), in accordance with MIL-STD-271.

Multi-Mission Surface Combatant

GLSV is currently supplying ship service diesel generator (SSDG) exhaust silencers for the new Multi-Mission Surface Combatant (MMSC) vessel. GLSV’s silencers have been custom designed for airflow and acoustic requirements, and have been designed for high impact mechanical shock in accordance with MIL-S-901D.

Constellation Class FFG(X)

GLSV is currently supplying ship service diesel generator (SSDG) exhaust silencers for new the Constellation-class guided missile frigate. GLSV’s silencers are custom designed for airflow and acoustic requirements, and are designed to operate in the naval environment to withstand shock, vibration, and other loading conditions. GLSV designs and manufactures naval exhaust silencers in accordance with strict NAVSEA welding and quality requirements.

LHA America Class: SSDG Exhaust Silencers

GLSV is currently supplying ship service diesel generator (SSDG) exhaust silencers for the America-class amphibious assault ship. GLSV’s silencers have been custom designed for airflow and acoustic performance requirements, and constructed in accordance with NAVSEA welding requirements. The silencers have also been Navy shock and vibration qualified.

T-AO and OPC

GLSV is also supplying main propulsion (MPDE) and SSDG exhaust silencers for the new John Lewis class oT_f T-AO fleet oilers. We are also under contract to supply diesel exhaust silencers for the US Coast Guard Offshore Patrol Cutter (OPC).

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Intake Systems

ducts, louvers, blow-in doors, moisture separators, anti-icing manifolds, and intake silencers

GLSV engineers and manufactures multiple components of intake systems for marine gas turbines and diesel powerplants. Our custom solutions are engineered to properly manage airflow and noise and are designed to operate in the naval environment and withstand shock, vibration, and other loading conditions. GLSV produces intake ducts, louvers, blow-in doors, moisture separators, anti-icing manifolds, and intake silencers.

GLSV is currently developing and qualifying cylindrical pod-style and rectangular baffle silencers under a current supply contract.

HVAC Systems

Anti-blast Dampers, louvers, moisture separators, and anti-icing

GLSV has the engineering and manufacturing capability to meet Navy HVAC system needs. Our products are designed to withstand harsh marine environments, as well as, shock and vibration resistance. GLSV is experienced in designing anti-blast dampers, multi-stage moisture separators, external marine louvers, and ducting systems. Our solutions are engineered for optimal acoustic, thermal, flow, and moisture separation performance.

Exhaust Systems

custom engineered exhaust systems

GLSV has specialized in the design and production of custom engineered exhaust systems for both Military and Commercial applications for over 20 years. Utilizing our extensive background in NVH and customized fabrication, GLSV has become a leader in producing robust, cost-effective solutions for our partners. We support defense prime contractors and shipyards by executing exhaust system development for various programs.

GLSV delivers solutions that are engineered for optimal performance, balancing competing requirements such as acoustic performance and air flow/backpressure requirements. Our custom solutions can meet tight space claim requirements and accommodate complex transitions, with the ultimate goal of designing a durable, qualified exhaust system that is easily manufactured and producible.

In addition to silencers and mufflers, GLSV can engineer and fabricate the entire exhaust piping system for proper placement and specification of pipe hangers and expansion joints, flexible bellows, valves, etc. We perform flexural analysis, CFD for flow and back-pressure characteristics, thermal expansion and thermal stress analysis, buckling, and shock and vibration. We will source the needed components such as bellows and valves, and fabricate and weld the piping assemblies in accordance with NAVSEA or MIL-spec welding requirements.

GLSV uses CAESAR-II software for piping design and analysis, enabling our engineers to design and evaluate piping systems of any size, type and complexity. With CAESAR-II we perform static, dynamic, and pipe flange analysis while accounting for thermal, pressure, static, dynamic, and environmental loads.

glsv + LCS

Inconel Exhaust Piping

GLSV is supplying multiple exhaust components and assemblies for a marine turbine gas engine application.  We support the U.S. Navy Littoral Combat Ship (LCS) Program by supplying components for their main propulsion gas turbine engine systems.  The components must adhere to stringent dimensional specifications as well as all NAVSEA welding, fabrication and inspection requirements. All components are fabricated using Inconel alloys, due to the high temperature operating environment.

Shock qualified equipment

GLSV developed a retrofit kit to upgrade an existing, COTS electro-mechanical device to withstand the shock and vibration environments on the LCS combatant ship. GLSV performed DDAM analysis and structural FEA, designed the structural and mechanical upgrades, and oversaw the Navy shock qualification per MIL-S-901. The unit successfully passed shock qualification and GLSV is currently manufacturing the upgraded units.

Stern Ramp and Door

GLSV designed, engineered, and analyzed the LCS-5 Stern Door and Ramp. Activities included full design responsibility, preparation and submittal of calculations, and preparation and submittal of DDAM analysis. GLSV also coordinated and led naval technical reviews including leading the team through approval of the formal CDR.

Propeller design for US navy torpedo

GLSV has been awarded a Phase-II SBIR from the Defense Logistics Agency (DLA) to reverse engineer and re-design a propeller for the US Navy’s MK54 Lightweight Torpedo. GLSV’s new propeller design will be low cost, high quality, and will also meet the quantitative engineering performance requirements in geometric design and volume, weight, produced thrust, noise and vibration, and structural strength and durability.

Turn-Key Solutions

Exhaust Systems

GLSV has specialized in the design and production of custom engineered exhaust systems for both Military and Commercial applications for 20+ years. Utilizing our extensive background in NVH and customized fabrication, GLSV has become a leader in producing robust, cost-effective solutions for our partners. We support defense prime contractors and shipyards by executing exhaust system development for various defense ground vehicle programs.

GLSV delivers solutions that are engineered for optimal performance, balancing competing requirements such as acoustic performance and air flow/backpressure requirements. Our custom solutions can meet tight space claim requirements and accommodate complex transitions, with the ultimate goal of designing a durable, qualified exhaust system that is easily manufactured and producible.

Fans

GLSV supplies Navy-standard centrifugal fans qualified to MIL-PRF-19004B for shipboard use. We currently have a supply contract with DLA Land & Maritime to supply several standard centrifugal fans.

GLSV also provides custom fan solutions to meet our customers’ most challenging air flow needs. Our goal is to provide high performing solutions quickly and affordably. We work through the challenges of air handling by iterating on fan blade design, full system CFD analysis, fan RPM and power consumption to arrive at a fan that fits the space claim and meets the pressure vs flow requirements while operating at acceptable speeds and power levels. GLSV has worked on many programs where fan noise is a concern for acoustic signature and human factor requirements. Our understanding of airflow noise propagation has helped us work with our customers early in vehicle development to manage these requirements efficiently and effectively by optimizing fans and ducts for quiet operation.

Intake Systems

GLSV also applies these same skill sets to the design and manufacturing of gas turbine intake silencers, intake piping systems and ducts, and cooling ducts. Our solutions are engineered for optimal performance for acoustic, thermal, and flow requirements.

Shock qualified components and systems

GLSV has a thorough understanding of how to design components and systems for the severe environments in ground combat vehicles and naval vessels. We design and qualify components for shock, vibration, and noise requirements such as MIL-S-901, MIL-STD 167, and MIL-STD 810. GLSV recently supported a customer by developing a retrofit kit to upgrade a COTS electromechanical device to withstand the shock and vibration environments on the LCS combatant ship.

Structural weldments

Whether it is internal development for our own products, or a contracted manufacturing effort – GLSV has the engineering and manufacturing expertise to produce structural components that meet stringent military standards. From weld qualification to nondestructive inspection and testing, GLSV manufactures fabricated components in accordance with NAVSEA S9074-AR-GIB-010/278, NAVESEA T9074-AS-GIB-010/271, and other Navy and MIL standards.

Custom equipment design

GLSV has a long history of designing and building turnkey systems and equipment for commercial and military customers. Some examples include custom test stands, end-of-line test/inspection systems, active motion compensation, and active noise cancellation products. These product development efforts leverage the skills of our multi-disciplinary engineering team in mechanical, structural, electrical, controls, and software.

GLSV is a value-added supplier for Navy and marine products.

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