L&T 72" Class 150 Gate Valve Bolted Bonnet Supplier Gujarat | Awal Valve

L&T Ultra Large-Bore Gate Valve (Bolted Bonnet, 72" Class 150, Support Legs): Technical Specifications, Automation, and Buying Guide

Introduction

In mega-scale municipal water mains, thermal power station cooling water headers, desalination plant seawater intake mains, and large industrial effluent lines, managing high-volume fluid distribution requires specialized flow isolation machinery. At a 72-inch nominal pipe size (DN 1800 / NPS 72), controlling dynamic line forces, structural deadweight, and wedge travel requires specialized heavy wall casting, structural support legs, and high-torque gear reduction or motorized actuation.

The L&T Ultra Large-Bore Gate Valve (Bolted Bonnet, 72" Class 150) is engineered for high-capacity, low-pressure flow isolation. Manufactured by L&T Valves in compliance with API 600, API 6D, AWWA C500, and ASME B16.34 standards, this 72-inch Class 150 gate valve features a heavy cast body, a multi-stud bolted bonnet flange, structural support legs for mounting stability, and a high-ratio bevel gear operator.

Product Overview

The L&T 72" Class 150 Bolted Bonnet Gate Valve features an ultra-large-diameter cast body supported by external steel mounting legs and equipped with a top-mounted bevel gear operator with a handwheel.

Constructed from heavy-section cast carbon steel (ASTM A216 Gr. WCB / WCC) or cast iron / ductile iron alloys, this valve provides structural integrity under ASME Class 150 working pressure conditions. The bonnet assembly features a multi-stud bolted flange joint. To support its weight and prevent pipeline strain, the valve structure includes integrated side support legs and a mounting base skid. The bevel gear operator (or optional electric motor actuator) enables controlled opening and closing strokes over long travel distances.

Technical Specifications

The certified engineering parameters for the L&T 72" Class 150 Gate Valve are detailed in the table below:

Key Features

• Ultra Large-Bore Capacity: 72-inch (DN 1800) full-bore flow passage ensures maximum volumetric throughput with minimal friction head loss and pumping power consumption.
• Integrated Support Legs: Factory-fitted side mounting legs and base skid transfer valve deadweight and dynamic piping loads directly to the civil foundation, preventing pipeline stress.
• Class 150 Pressure Rating: Heavy-section casting walls engineered to safely contain working pressures up to 19.6 bar (285 PSI) at ambient temperatures.
• Heavy Multi-Stud Bolted Bonnet: Multi-bolt flange design with high-tensile alloy studs and premium gasket materials ensures joint containment against water hammer and pressure surges.
• High-Ratio Bevel Gear Operator: Factory-equipped with a weather-proof bevel gearbox providing high mechanical advantage for single-operator manual opening/closing.
• Hardfaced Dynamic Seating: Hardfaced seat rings and flexible wedge dynamic faces prevent wire-drawing erosion and seat galling during high-velocity fluid flow.

Applications

The structural design and large-bore capacity of the L&T 72" Class 150 Gate Valve make it suitable for high-volume liquid infrastructure:

• Municipal Water Mains & Transmission: Cross-country bulk water supply mains, dam outlet isolation, and raw water intake pumping stations.
• Thermal & Nuclear Power Plants: Main condenser cooling water intake/discharge mains, circulating water headers, and cooling tower isolation.
• Desalination Plants: Sea water intake isolation mains, brine discharge lines, and plant header distribution valves.
• Industrial Utility Infrastructure: Large-scale chemical plant utility headers, stormwater drainage mains, and effluent treatment plant isolation.

Benefits

• Foundation Load Stability: Integrated structural support legs eliminate pipeline sagging and protect connecting flange joints from bending moments.
• High Pumping Efficiency: Full-port gate geometry maintains laminar flow and minimizes head loss across large-diameter piping systems.
• Smooth Manual & Motorized Control: High mechanical gear reduction allows smooth manual stroke operation, while top-yoke dimensions support retrofitting with electric actuators.
• Long Service Life: Robust casting wall sections and wear-resistant trim materials protect internal components from erosion during high-volume flow.

L&T Valve Dealer in Ahmedabad and Gujarat

Major infrastructure and process projects across Gujarat—including water transmission networks in Ahmedabad, power generation stations in Mundra and Ukai, desalination facilities in Dahej, and petrochemical terminals in Hazira and Jamnagar—require large-bore water and process valves. Sourcing through an authorized L&T valve dealer in Ahmedabad guarantees authentic products supplied with 3.1 Manufacturer Test Certificates (MTC) and complete material heat traceability.

Key industrial corridors with strong demand for L&T ultra large-bore valves include:

• Ahmedabad: Industrial manufacturing and municipal engineering zones in Vatva, Naroda, Odhav, Changodar, and Sanand.
• Major Gujarat Industrial Belts: Vadodara, Ankleshwar, Bharuch (Dahej PCPIR), Jamnagar, Surat (Hazira), Vapi, and Mundra.

Partnering with an established L&T valve supplier in Gujarat simplifies procurement logistics, ensures competitive pricing, and offers expert technical support for large-bore valve mounting and actuation integration.

Why Choose Awal Valve

When procuring large-scale flow control equipment like the L&T 72" Class 150 Gate Valve, L&T CS ball valve, or L&T SS ball valve, Awal Valve is your premier industrial supply partner across Gujarat.

Why partner with Awal Valve:

• 100% Genuine L&T Inventory: Factory-direct valves delivered with original Manufacturer Test Certificates (MTC, 3.1) and complete material heat numbers.
• Comprehensive Valve Range: Full access to L&T gate, globe, check, and ball valves in manual, gear, and motorized configurations across all size ranges.
• Technical & Foundation Guidance: Expert assistance in specifying support leg positioning, gear ratios, and electric actuator mounting options for large-bore valves.
• Competitive Project Pricing: Transparent market rates tailored for EPC contractors, municipal water authorities, and industrial plant turnarounds.

Conclusion

The L&T Ultra Large-Bore Gate Valve (Bolted Bonnet, 72" Class 150) is an exceptional flow isolation solution engineered for mega-scale water mains, cooling headers, and industrial process networks. Combining heavy cast construction, integrated structural support legs, a multi-stud bolted bonnet, and high-torque gear actuation, it delivers reliable operational safety and long-term durability for large-bore piping infrastructure.

For price quotations, installation datasheets, or quick procurement in Gujarat, contact Awal Valve—your trusted L&T ball valve dealer and process valve specialist.

Frequently Asked Questions (FAQs)

Q1: Why are external support legs required on a 72-inch gate valve?

A: A 72-inch Class 150 gate valve weighs several tons. Integrated support legs transfer structural deadweight and operating thrust directly to the civil foundation, preventing pipe sagging and flange strain.

Q2: What flange standard governs 72-inch Class 150 gate valves?

A: Large-diameter flanged valves above 24 inches conform to ASME B16.47 Series A (MSS SP-44), Series B (API 605), or AWWA C207 standards.

Q3: Can a 72" Class 150 gear-operated valve be motorized in the field?

A: Yes, the yoke top flange interface allows retrofitting with multi-turn electric motor actuators (such as Rotork or AUMA) for automated remote SCADA operation.

Q4: How can I procure authentic L&T ultra large-bore gate valves in Gujarat?

A: You can source authentic L&T large-bore valves directly through an established L&T valve supplier in Gujarat like Awal Valve, complete with official 3.1 manufacturer test certification.

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