Description

Pressure Seal IBR Gate Valve Manufacturer in India

Unitek Valves manufactures, supplies, and exports high-performance Pressure Seal IBR Gate Valves engineered for severe high-pressure, high-temperature steam lines, power generation boilers, and critical process headers. Certified under Indian Boiler Regulations (IBR Form III-C), our valves leverage internal system pressure to deliver a reliable, zero-leakage body-bonnet seal. Operating from Mumbai, we supply custom-engineered pressure seal gate valves to EPC contractors, power plants, and industrial processing units across India and international markets.

What is a Pressure Seal IBR Gate Valve?

A pressure seal IBR gate valve is a heavy-duty, linear-motion isolation valve designed specifically for high-pressure utility services where traditional bolted bonnet connections become excessively large or prone to thermal gasket relaxation.

• Self-Sealing Integrity: Features an internal bonnet mechanism that utilizes internal fluid pressure to compress a flexible seal ring against the tapered inner wall of the valve body. Higher system pressure increases joint tightness.

• Optimized Body Weight: Eliminates heavy, bulky body-bonnet flanges and bolting, significantly reducing overall valve weight and footprint in high-pressure piping circuits.

• Full-Bore Positive Shut-Off: Designed with a flexible or solid wedge that lifts completely out of the flow path to deliver straight-through flow with minimal pressure drop.

Pressure Seal Sealing Mechanism

• Initial Preload: Threaded retaining rings or bonnet studs establish the initial low-pressure seal between the flexible seal ring and the tapered body wall.

• Pressure-Assisted Sealing: As line pressure rises, the upward force exerted against the bonnet block drives the seal ring tighter against the tapered body wall, securing leak-tight pressure containment under severe thermal cycling.

Pressure Seal IBR Gate Valve Design Features

• OS&Y Design (Outside Screw & Yoke): External stem threads remain protected from high-temperature steam and line debris, while providing direct visual position indication.

• Stellite Hardfaced Seating: Wedge seating faces and body seat rings feature Cobalt-base alloy (Stellite) or 13% Cr overlays to prevent thermal galling, erosion, and wire-drawing.

• Flexible Wedge Configuration: Central relief groove enables independent wedge face deflection to compensate for body seat distortions caused by piping loads and thermal expansion.

• High-Pressure End Connections: Butt Weld (BW) ends conform to ASME B16.25 for permanent, leak-free inline welding; Flanged ends (RF/RTJ) are available based on project specifications.

Material Specifications & Pressure Classes

Material Grades

• ASTM A216 WCB: Cast carbon steel for medium-pressure steam and boiler feedwater service.

• ASTM A217 WC6: Alloy steel (1-1/4 Cr – 1/2 Mo) engineered for superheated steam and high-temperature utility lines.

• ASTM A217 WC9: Alloy steel (2-1/4 Cr – 1 Mo) providing superior creep rupture strength and oxidation resistance for severe power plant service.

ASME Pressure Ratings

• Class 600 & Class 900: High-pressure steam distribution headers, auxiliary boiler piping, and co-generation isolation.

• Class 1500 & Class 2500: Main steam lines, superheater outlets, turbine isolation, and severe-service power loops.

Key Applications

• Thermal Power Generation: Main steam isolation, superheater and reheater drains, boiler feed pump discharge, and turbine bypass systems.

• Refineries & Petrochemicals: High-pressure steam distribution grids, hydrocracker steam supply, and catalyst regeneration lines.

• Heavy Process Steam: Co-generation boiler houses in sugar plants, paper mills, chemical manufacturing, and central utility plants.

Why Choose Unitek Valves?

• IBR Form III-C Certified: Complete material traceability, non-destructive examination (NDE), and hydrostatic pressure testing (API 598 / ISO 5208) witnessed and certified by authorized IBR inspectors.

• ASME B16.34 Design: Engineered to exact wall thickness, pressure-temperature rating, and dimension standards for demanding high-pressure isolation.

• Mumbai Manufacturing Base: Supplying compliant pressure seal valve packages across India and exporting worldwide with complete quality assurance documentation.

Material :	A216 WCB / A352 LCB / A217 WC1 / A217 WC6 / A217 WC9 / A217 C5 / A217 C12
Trim:	13CR / SS304 / SS316 / SS304+STELLITED / SS316+STELLITED / SS321 / SS347 / F51 / MONEL
Operator :	Hand wheel, Gear, Electrical actuator
Note :	• OS & Y Type, • SS inlay on sealing zone for carbon steel valves
Optional :	Electrical & Geared Drive, By pass arrangement

Range	Pressure Seal Gate Valves
valve	rating	150	300	600	900	1500	2500
PSV 102	inches	–	–	2″-12″	2″-10″	2″-10″	2″-6″
	mm	–	–	50-300	50-300	50-250	50-150