Gate Valve

Gate valve series covers API American Standard, flat gate valve, knife gate valve, and bellows seal gate valve structures, suitable for applications ranging from general industrial to harsh conditions such as oil & gas, chemical, power generation, and mining. Body materials include carbon steel, stainless steel, alloy steel, and more. Sealing options include metal-to-metal or elastomeric seals, meeting various pressure, temperature, and media requirements. Products comply with API, ASME, BS and other international standards.

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Core Advantage

Multiple structure types: API American Standard heavy-duty, flat gate valve (single plate / double plate DBB), knife gate valve, bellows seal gate valve – adaptable to different media and working conditions
Reliable sealing: Bidirectional zero-leakage seal, compliant with API 598 bubble-tight standard; bellows type achieves dynamic sealing with fugitive emission zero
High pressure & high temperature resistance: Pressure up to Class 2500 (~4500 psi), temperature up to 650°C; cryogenic version down to -196°C
Suitable for harsh media: Knife gate valve cuts through fibrous, viscous, and granular media; flat gate valve suitable for abrasive fluids such as slurries
Easy operation: Manual (handwheel/lever), electric, pneumatic, hydraulic options available – supports on-site adjustment and remote automated control
Durable construction: Heavy-duty body + high-strength materials – wear-resistant, corrosion-resistant, long service life
Full bore design: Maintains pipeline flow capacity; reduced bore options available to lower costs
Safety design: Double plate gate valve provides upstream/downstream isolation with pressure relief port – enhanced safety

Application

Used for reliable shut-off and flow control in oil & gas exploration and long-distance pipelines, refinery processing units, and chemical plant corrosive media lines. In mining, wastewater treatment, and pulp & paper industries, knife gate valves cut through fibrous media, slurries, and granular materials to prevent clogging. Bellows seal gate valves are suitable for fugitive emission zero applications involving toxic, hazardous, or high-value media, such as petrochemical, pharmaceutical, and nuclear power systems.

Technical Parameters

Parameter	Range
Port Size	1/2″ – 48″ (DN15 – DN1200)
Pressure Rating	Class 150 – Class 2500 (PN10 – PN420)
Temperature Range	-196°C to 650°C (depending on material and seal type)
Body Materials	Carbon steel (WCB), stainless steel (304/316/316L), alloy steel (F11/F22), nickel-based alloys
Gate / Seat Materials	Stainless steel + hard-facing alloy (Stellite, tungsten carbide), PTFE, rubber
Seal Type	Metal-to-metal, elastomeric (PTFE/rubber)
Connection Types	Flanged (RF/RTJ), butt-weld, socket-weld, threaded, wafer, lug
Actuation	Manual, electric, pneumatic, hydraulic
Design Standards	API 6D, API 603, ASME B16.34, BS 5351