Rising Stem Gate Valve

Technical Overview:

• Nominal Size: 2″ to 48″
• Pressure Class: Class 150 to Class 2500
• Temperature Range: -29°C to +650°C
• Design Standards: API 600, ASME B16.34, BS 1414
• Face to Face: ASME B16.10
• End Connections: Flanged (RF/RTJ), Butt Weld (BW), Socket Weld (SW)
• Inspection and Testing: API 598, ISO 5208
• Construction: OS&Y Rising Stem, Flexible Wedge, Bolted Bonnet, Pressure Seal Bonnet

Construction Details and Materials:

Body and Pressure Retaining Parts:

• ASTM A216 WCB
• ASTM A352 LCB / LCC
• ASTM A351 CF8 / CF8M / CF3M
• ASTM A995 4A / 5A / 6A
• ASTM A351 CN7M
• ASTM B148 C95800

Rising Stem Gate Valve Internal Components:

• Gate: Flexible Wedge / Solid Wedge
• Stem: ASTM A182 F304 / F316 / F316L
• Seat Ring: Stainless Steel with Stellite Overlay
• Backseat: Integral Backseat Design

Rising Stem Gate Valve Sealing System:

• Packing: Flexible Graphite / PTFE
• Gasket: Spiral Wound Stainless Steel with Graphite Filler
• Stem Sealing: Low Emission Packing available for API 624 and ISO 15848 requirements

How Does a Rising Stem Gate Valve Work?

The Rising Stem Gate Valve works on the principle of Outside Screw and Yoke (OS&Y) design where turning of the handwheel/actuator results in vertical movement of the stem which raises the wedge up from the flow line when the valve is being opened and presses the same to the seating ring when the valve is being closed. The Rising stem design allows for easy visibility of the valve position. Full bore design helps in reducing the pressure drop while flexible design of the wedge assures reliable shut off regardless of changes in pressures and temperatures.

Body and Trim Materials of Rising Stem Gate Valve:

Component	Material	Grade	Typical Application
Body	Carbon Steel	ASTM A216 WCB	Oil and gas service
Body	Low Temperature Carbon Steel	ASTM A352 LCB / LCC	Low temperature applications
Body	Stainless Steel Cast	ASTM A351 CF8 / CF8M / CF3M	Corrosive process applications
Body	Duplex Stainless Steel	ASTM A995 4A / ASTM A890 F51	Offshore and seawater systems
Body	Super Duplex Stainless Steel	ASTM A995 5A / 6A	High chloride environments
Body	Alloy 20	ASTM A351 CN7M	Acidic process media
Body	Aluminium Bronze	ASTM B148 C95800	Marine environments
Stem	Stainless Steel	ASTM A182 F304 / F316 / F316L	Valve operation and corrosion resistance
Seat Ring	Stainless Steel with Stellite Overlay	Hard Faced	Wear resistance and tight shut off

Extended Materials (On Request):

• Hastelloy C276 for aggressive chemical service
• Inconel 625 / 718 for high temperature and severe service applications

Additional Engineering Specifications:

Valve Type	Rising Stem Gate Valve
Operation	Manual / Gear Operated / Pneumatic / Electric
Design Feature	OS&Y Rising Stem with Flexible Wedge
Flow Characteristics	Full Bore Isolation
Leakage Control	Tight Shut Off
Pressure Capability	Class 150 to Class 2500
Temperature Capability	Suitable for service from -29°C to +650°C
Service Media	Water, Steam, Oil, Gas, Chemicals and Petrochemical Fluids

 

Industries That Use Rising Stem Gate Valves:

• Oil and Gas Processing Plants: Reliable isolation of crude oil, natural gas, and hydrocarbon process lines operating at high pressures.
• Transmissions Pipelines: Provides reliable isolation of long-haul oil, gas, and utility transmission pipelines.
• Oil Refineries and Petrochemical Plants: Flow control of hydrocarbons, steam, and other process media.
• Power Generation Plants: Used for steam, feedwater, and auxiliaries needing reliable isolation.
• Offshore Installations: Provides reliable isolation in offshore platforms operating in corrosive environments.
• Water Treatment and Desalination Plants: Reliable isolation of water distribution and treatment systems with minimum pressure drop.
• Mining and Ore Processing Plants: Used in slurry, water, and ore processing systems in mining industries.
• Steam Isolation: Tight shut off in high temperature steam distribution and boiler system.
• Pipe Line Isolation: Safe isolation of industrial piping systems for maintenance purposes.
• Chemical Processing Industry: Various chemicals and process media with appropriate materials selection.