Parallel Slab Gate Valve

Parallel slab gate valve is a gate and seat parallel movement of the cut-off valve, through the gate vertical lift to achieve the opening and closing of the pipeline fluid control, suitable for oil, natural gas, chemical and other industries, high pressure, high flow or impurity-containing media scene. Its design follows GB/T 12234 and API 600 standards, and the core structure includes parallel gate, seat and actuator.

Structural

• The gate plate moves parallel to the valve seat:

Parallel contact between gate and seat plane, low friction during opening and closing, easy to operate.
Double gate structure through the spring or top wedge design to achieve automatic sealing, to enhance the sealing performance under low-pressure conditions.

• Seal design:

Composite seal: metal hard seal (e.g. Stellite alloy) and soft seal (rubber/PTFE) combination, adapt to pressure fluctuations and temperature changes.
Removable seat design for easy maintenance or replacement of seals.

• Actuator:

Support manual, electric or pneumatic drive, open stem structure is easy to observe the opening and closing status, dark stem structure saves space.

Specification

Nominal diameter (DN): DN50 ~ DN1200 (common range), full bore design to reduce flow resistance.
Pressure rating:
American Standard: Class150～Class2500 (up to 42MPa).
European standard: PN10～PN420.
Connection: flange (ANSI/DIN standard) or welding, suitable for high-pressure piping systems.

 

GNEE Parallel Slab Gate Valve

 

Advantages

• High sealing performance:

Double gate elastic compensation or spring preload design, leakage class VI (zero leakage).

• Low flow resistance and high flow capacity:

Straight-through flow path design with low pressure drop loss, suitable for high flow scenarios such as long-distance pipelines.

• Durability & Easy Maintenance:

Sealing surface hardening treatment (nitriding/tungsten carbide spraying), wear resistance is improved, long service life.
The valve seat can be replaced online, reducing maintenance costs.

• Strong adaptability:

Temperature range: -196℃ (deep cold) to +550℃ (high temperature steam).
Media compatibility: crude oil, natural gas, acid and alkali solutions, slurries containing particles, etc..

• Seal reliability:

Composite seal design ensures no leakage in both high pressure and low pressure working conditions and meets API 598/GB/T 13927 standards.

• Economy:

Low flow resistance reduces pumping energy consumption, removable valve seat reduces maintenance costs.

• Work condition adaptability:

Resistant to extreme temperatures, corrosion and particle scouring, covering complex industrial scenarios.

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