AsalAra Cast Steel Bolted Bonnet Gate Valve
- Bolted Bonnet Gate Valve
The AsalAra Bolted Bonnet Gate Valve is a heavy-duty, bidirectional shut-off valve designed in compliance with API 600 / ASME B16.34 standards. It features a full port, rising stem, outside screw & yoke (OS&Y) design, making it ideal for on/off service in oil & gas pipelines, refineries, power plants, and water treatment facilities.
Its bolted bonnet construction provides easy maintenance access while ensuring pressure integrity under high-pressure/high-temperature conditions. Engineered with precision lapping of the wedge and seat rings, this valve ensures zero-leakage isolation, long service life, and dependable operation even in harsh environments.
NPS (inch)
DN (mm)
2” – 36”
DN 50 – DN 900
Standard
Rating
ASME
Class 150, 300, 600, 900, 1500
API
Up to 2500 psi (on request)
- Body / Bonnet: ASTM A216 WCB, A351 CF8/CF8M, A352 LCB, A217 WC6, WC9
- Disc/Wedge: A105 +13%Cr, SS316, Inconel Cladded
- Seat Rings: Renewable, Stainless Steel or Stellite-faced
- Stem: SS410, SS316, Monel, 17-4PH
- Gasket: Spiral Wound Graphite + SS316
- Packing: Graphite or PTFE
- Yoke Bushing: Bronze or Stainless Steel
- Flanged RF / RTJ – ASME B16.5
- Butt Weld – ASME B16.25
- Socket Weld / Threaded (for small sizes)
- Face-to-Face – ASME B16.10
- Actuator Mount – ISO 5210 (optional)
AsalAra Cast Series
Gate, Globe & Check Valves (GGC)
Bolted Bonnet
Provides robust sealing and easy maintenance
Outside Screw & Yoke (OS&Y)
Clear visual position indication of valve status
Flexible or Solid Wedge
Ensures proper sealing in thermal cycling or misaligned seats
Full Bore Design
No flow restriction, ideal for pigging operations
Renewable Seat Rings
Extended valve service life and easier refurbishment
Backseat Design
Allows repacking the gland under pressure
Fire-Safe Construction
Available as per API 607 / API 6FA
Fugitive Emission Packing
ISO 15848 optional for low leakage requirements
Oil & gas transmission pipelines
Petrochemical plants
Power generation (steam, condensate lines)
Desalination & water treatment
Refinery shut-off systems
LNG & cryogenic service (with bonnet extension)
- Flexible or solid wedge
- Pressure seal bonnet (for high-pressure variants)
- Bypass valve arrangement
- Drain plug/tapping
- Locking device for manual valves
- Chain wheel, handwheel, gearbox, or actuator operation
- Fire-safe and anti-static design
- Stem extensions for buried or insulated service
- API 600 / API 603 (SS)
- API 6D
- ASME B16.34 / B16.10 / B16.5 / B16.25
- API 598 – Testing
- ISO 5210 / ISO 10497
- NACE MR0175 / ISO 15156 (H2S service)
- PED 2014/68/EU
- Fire-safe to API 607 / ISO 10497 (on request)
The AsalAra Cast Steel Gate Valve with bolted bonnet offers versatile, dependable shut-off performance across a broad spectrum of industries. Its rugged forged components, field-serviceable design, and compatibility with modern actuation systems make it a top-tier solution for high-integrity isolation in critical process pipelines.