Gate Valve Product Center

Professional linear-motion shutoff valves for industrial applications

Definition & Working Principle

Gate valves are bi-directional, linear-motion shutoff valves. The sealing element ('gate' or 'wedge') moves perpendicular to flow to provide tight isolation. Full port design ensures minimal flow resistance.

Working Principle:

Disc/gate lifts out of the flow path when open
Linear rising/descending movement via stem
Full-open: straight bore, no cavity, minimal pressure drop
Full-close: metal-to-metal or soft seat tight shutoff

Gate Valve Cross-Section
Engineering Schematic with Labeled Components

Cross-sectional view showing gate position and flow path

Construction & Components

Technical specifications and material standards

Component	Material Options	Standard Reference
Body	WCB, CF8, CF8M, LCB	ASTM A216, A351
Wedge/Gate	13Cr, F6a, CF8, CF8M	ASTM A182, A351
Stem	13Cr, SS316	ASTM A182
Seat	Stellite, SS304, PTFE	-
Bonnet	Same as body	ASTM A216, A351
Stem Packing	PTFE, Graphite	-
Gaskets	Spiral wound, RTJ	ASME B16.20
Bolting	A193 B7/A194 2H	ASTM A193/A194

Exploded View

Numbered Component Diagram

Body
Bonnet
Wedge/Gate
Stem
Seat Ring
Backseat
Stem Packing
Gland
Yoke
Actuator

Gate Valve Types & Classifications

Bolted Bonnet

OS&Y

Standard service applications with moderate pressure and temperature requirements.

Pressure Seal

OS&Y

High pressure and temperature applications where bolted bonnets are not suitable.

Forged Steel

OS&Y/NOS&Y

Compact size applications with high strength requirements, typically smaller bore sizes.

Parallel Slide

OS&Y

Steam service and applications requiring zero-leakage performance.

Slab/Through-Conduit

NOS&Y

Oil and gas pipeline applications requiring full bore flow and pigging capability.

Knife Gate

NOS&Y

Slurry, pulp, and mining applications with solid-laden media.

API 600/API 6D

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Oil, gas, and chemical industry applications meeting API standards.

Classification Standards

Gate valves are classified according to design standards (API 600, API 6D, ASME B16.34), pressure ratings (Class 150-2500), and end connection types (RF, RTJ, BW). Selection depends on service conditions, media properties, and application requirements.

Technical Specifications

Comprehensive product data ranges and standards

Type	Size (DN/inch)	Pressure (PN/LB)	Body Material	Gate Material	Seat Material	Temperature Range	End Connection	Standards
Bolted Bonnet	DN50-DN600 2"-24"	PN16-PN100 150LB-600LB	WCB, CF8, CF8M	13Cr, F6a, CF8	Stellite, PTFE	-29°C to +425°C	RF, RTJ	API 600, ASME B16.34
Pressure Seal	DN50-DN600 2"-24"	PN100-PN420 900LB-2500LB	WCB, CF8, CF8M	13Cr, F6a, CF8M	Stellite, Metal	-29°C to +538°C	RF, RTJ	API 600, ASME B16.34
Forged Steel	DN15-DN100 ½"-4"	PN160-PN420 800LB-2500LB	F22, F316, F317	F6a, F316, F317	Stellite, Metal	-46°C to +538°C	SW, BW, NPT	ASME B16.34
Slab Gate	DN50-DN1200 2"-48"	PN16-PN100 150LB-600LB	WCB, CF8, CF8M	13Cr, CF8, CF8M	Metal, Elastomer	-29°C to +200°C	BW, RF	API 6D
Knife Gate	DN50-DN1000 2"-40"	PN10-PN25 150LB-300LB	WCB, CF8, CF8M	SS316, 13Cr	EPDM, NBR	-10°C to +180°C	Wafer, Lug	MSS SP-81

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