Model 500 and 1520 Gate Valves
Printable Version

Seaboard International Model 500 gate valves are designed with an expanding split gate and non-rising stem. Metal-to-metal sealing technology is utilized throughout the valve to increase performance integrity. These valves are available for applications from 3,000 to 5,000 psi. Trim levels are available to suit all types of oil and gas service. Flanged or threaded configurations are available in standard bore sizes from 2-1/16 through 6-3/8.

Seaboard International Model 1520 gate valves are designed with an expanding split gate and a pressure-balancing stem. Metal-to-metal sealing technology is utilized throughout the valve to increase performance integrity. These valves are available for applications through 10,000 psi. Trim levels are available to suit all types of oil and gas service. Flanged end configurations are available in standard bore sizes from 1-13/16 through 4-1/16.

Key Features:

Full-Bore Through-Conduit Design
All Model 500/1520 gate valves utilize a full-bore through-conduit seat/gate design.

• Maximizes valve life by eliminating the collection of destructive particles
• Unrestricted flow reduces turbulence and pressure drops

Sealing Technology
Dependable seals are critical to valve safety and performance. Model 500/1520 gate valves utilize reliable metal-to-metal sealing technology.

• Seals are stable, thermally insensitive, and environmentally resistant
• Utilized in the gate/seat, body/ bonnet, and body/seat interfaces

Parallel Expanding Gate Design
The expanding action of the gate provides a positive mechanical seal across the seats both upstream and downstream.

• Wedging only occurs in the full open or full closed positions
• Provides a positive mechanical seal regardless of line pressure

Low Operating Torque
Ease of operation is inherent in the design of all Model 500/1520 gate valves.

• The 500 features non-rising stems using durable Acme threads
• Roller thrust bearings are isolated from cavity pressure
• Lubrication ports in body

Pressure Venting Capabilities
A safe method for bleeding pressure from the valve cavity is essential.

• Wedge gates in the full closed position provide a positive mechanical seal isolating valve cavity from wellbore pressure
• Block and bleed design isolates line pressure

Body Lubrication
Although Model 500/1520 gate valves do not require lubrication to seal, only the highest quality lubricants are used to reduce operating torque and inhibit corrosion.

• Gate guides act as skirts, assisting in retention of lubricants
• Prevents potential corrosion and collection of solids

In-line Repairability
A routine maintenance program keeps repairs to a minimum. Should repairs be necessary, vital valve components may be replaced.

• Gates, seats, stems and other critical parts are easily replaced in the field
• Stem packing can be re-energized while the valve is under pressure

Extended Stem Life
As the primary operating component of the valve, Model 1520 gate valve stems are designed with threads located outside of the valve cavity.

• Stem threads are not exposed to wellbore particles
• Design of the stem/stem nut interface offers enhanced galling resistance