1. Standards and specifications
Basic standards:
● GOST 3706-93: Standards for the design and production of general-purpose gate valves.
● GOST 5762-2002: Special standards for gate valves for the oil and gas industry.
● GOST R 55018-2012: Requirements for gate valves adapted to low temperature conditions.
● Pressure Rating (PN): Usually PN10, PN16, PN25 (Corresponds to the range of low pressure, medium and low pressure, about 1.0~2.5Mpa).
● Diameter Range (DN): Usually DN50~DN1200, covers small and medium diameter pipelines as well as large diameter pipelines.
2. Construction and materials
Gate valve body type:
● Wedge Gate Valve: Reliable seal but requires precise centering.
● Elastic wedges: adapts to temperature or pressure fluctuations and reduces the risk of jamming.
● Drive Mode: Manual (Handwheel, Reducer), Electric, Pneumatic or Hydraulic
Main Material:
● Carbon steel (St20, 25L according to GOST 977-88) is used for normal environments.
● Stainless steel (12H18N9T, 08H18N10T) is used for corrosive environments.
● Pig iron (nodular iron according to GOST 7293-85) is used for low-pressure water supply systems.
● Seal material: rubber (EPDM, NBR), polytetrafluoroethylene (PTFE) or metal solid seal (stainless steel shell).
3. Typical characteristics
● Bi-directional flow: The gate valve has no flow restrictions and can be installed in both directions.
● Full-bore design: the flow channel corresponds to the inner diameter of the pipe, with low pressure drop, suitable for transporting viscous or particle-containing media.
● Convenient maintenance: The valve cover of some models is removable, which is convenient for replacing seals.
● Fireproof design: Some Russian standard gate valves meet the fire safety requirements of GOST R 53672-2009 and can maintain temporary sealing after the sealing material has burned.
4. Areas of application
● Oil and natural gas: low-pressure gathering and transportation pipelines, import and export storage tanks.
● Public utilities: water supply and sewerage systems, heating mains (heat-resistant valves are required).
● Chemical industry: cutting off acids, alkalis and other mild environments.
● Electricity: circulating water, steam system (temperature adaptation should be noted).
Ball Valve Series
Butterfly Disc Valve Series
Slide Valve Series
Stainless Ball Valve Series
