Description

Bolted Bonnet IBR Gate Valve Manufacturer in India

Bolted bonnet IBR gate valves provide reliable positive shut-off for steam lines, power plants, boilers, and industrial piping. Unitek Valves manufactures, supplies, and exports high-performance IBR certified gate valves engineered for elevated pressure and high-temperature services. Certified under Indian Boiler Regulations (IBR Form III-C), our valves ensure zero-leakage isolation, operational safety, and full compliance for critical utilities across India and international markets.

What is a Bolted Bonnet IBR Gate Valve?

A bolted bonnet IBR gate valve is a heavy-duty, linear-motion isolation valve used to start or stop the flow of high-pressure steam, water, oil, or gas.

• Full-Bore Flow: Moving the wedge completely out of the fluid path ensures a straight-through flow with minimal pressure drop.

• Maintainable Bolted Bonnet: The flanged body-to-bonnet joint is secured with high-tensile alloy studs and spiral wound gaskets. This construction enables easy inline disassembly, seat lapping, and packing replacement without cutting the valve from the pipeline.

• IBR Compliance: Inspected and tested under Indian Boiler Regulations to withstand severe thermal expansion and pressure cycling.

Key Features & Construction

• OS&Y Design (Outside Screw & Yoke): External stem threads remain isolated from line media, protecting against corrosion and high-temperature wear while providing a visual indication of valve position.

• Flexible Wedge Configuration: Accommodates seating face deflection and prevents thermal binding during high-temperature steam cycles.

• Tight Body-Bonnet Joint: Precision-machined joint profiles (oval flat, male-female, or RTJ) ensure zero stem/bonnet leakage under pressure surges.

• Stellite Hardfacing: Seats and wedges feature hardfaced seating options to resist high-velocity steam erosion, wire-drawing, and galling.

Applications

• Boiler House & Steam Headers: Main steam isolation, boiler drum drains, soot blowers, and superheater control lines.

• Power Generation: Thermal power plants, co-generation plants, turbine inlet isolation, and high-pressure feedwater systems.

• Process Industries: Chemical processing, textile, paper & pulp, sugar, and refining facilities operating high-pressure utility steam lines.

Why Choose Unitek Valves?

Unitek Valves is a trusted manufacturer, supplier, and exporter of industrial IBR gate valves based in Mumbai, India.

• IBR Form III-C Certified: Complete material traceability, stage inspections, and hydrostatic/pneumatic pressure testing supervised by authorized IBR inspectors.

• Custom Engineering: Options for electrical actuators, gear operators, bypass lines, and special alloy trim materials.

• Global Supply Capabilities: Delivering project-specific orders across India and exporting to global buyers with complete technical documentation.