Russian Standard High Pressure Gate Valve

1. Standards and specifications
● Main Standards: Conform to GOST series (Russian National Standards), such as GOST 3706-93 (General Specifications for Gate Valves), GOST 9544-2015 (Gate Valve Sealing Standards), etc.

● Pressure Level: Usually covers PN16~PN250 (or 150~2500 grade), suitable for high-pressure and even ultra-high-pressure environments.

● Connection method: the flange connection is in accordance with GOST 12815-80, and the threaded connection can be in accordance with GOST 6357-81 (pipe thread standard).

2. Structure and material
● Gate valve body type: mainly rigid wedge or elastic wedge gate valve to ensure the sealing reliability at high pressure.

Basic materials:

● Valve body/gate: carbon steel (25L, 35L), alloy steel (09G2S), stainless steel (12X18N10T) or special alloys suitable for corrosive or high-temperature environments.

● Sealing surface: clad carbide (such as stellite) or use fluorine rubber to improve sealing.

● Drive mode: manual (handwheel or reducer), electric, pneumatic or hydraulic to meet different operating requirements.

3. Main characteristics
● High Pressure Resistance: High structural strength confirmed by GOST (Pressure Test) tests to ensure no leakage at rated pressure.

● Bi-directional compaction: Most models support bi-directional fluid flow, and the compaction efficiency is independent of the flow direction.

● Temperature range: -60°C to 560°C depending on the material, suitable for extremely cold or high-temperature environments.

● Anti-leakage design: Using graphite packing or bellows seal (for high-risk environments) in accordance with GOCT 9544 leakage level (e.g., zero leakage level A).

4. Typical Application Scenarios
● Oil and gas: trunk pipelines, wellheads, high-pressure systems for oil refining.

● Energy industry: water supply to boiler houses, power plants, steam system.

● Chemical industry: high-pressure reactor, corrosive environment control.