GOST 5762 gate valve is a type of metal valve that controls media flow by vertically moving the gate along the centerline of the passageway, achieving full open or full closed operation. The gate moves perpendicular to the fluid direction, with sealing types classified as self-sealing or forced sealing. Structurally, it falls into two categories:
Wedge gate type (including single-gate, double-gate, and elastic-gate designs)
Parallel gate type
The driving mechanisms consist of:
Rising stem (OS&Y)
Non-rising stem (rotating stem)
These valves are typically used in pipeline systems with DN ≥ 50mm but can also be applied to small-caliber cutoff devices.
Specification
Design and Manufacture: GOST 5762
Size Range: DN50-DN1200
Pressure Range: PN16-PN420
Flange Ends Standard: GOST 33259
Face to Face Dimensions: GOST 3706-93
Features
Lightweight:
The body is made of high-grade ductile iron, reducing weight by approximately 20%~30% compared to traditional gate valves, facilitating installation and maintenance.
Flat-bottom Seat:
Traditional gate valves often accumulate debris (e.g., stones, wood blocks, cement, iron chips) in the valve bottom groove after water flushing, leading to leakage due to incomplete sealing.
The elastic-seal gate valve adopts a flat-bottom design identical to pipelines, minimizing debris accumulation and ensuring unobstructed fluid flow.
Full Rubber Lining:
The gate is fully lined with high-quality rubber (inner and outer layers) using top-tier European vulcanization technology, ensuring precise geometric dimensions, strong adhesion to the ductile iron gate, and excellent elastic memory.
Precision-cast Body:
The valve body is precision-cast, achieving exact geometric dimensions that guarantee sealing without additional internal machining.
Advantages
Low fluid resistance, with minimal erosion or scour on sealing surfaces by media.
Easier operation (less force required for opening/closing).
Unrestricted flow direction, no turbulence, and no pressure reduction.
Simple shape, short structural length, excellent manufacturability, and wide applicability.
Disadvantages
Sealing surfaces are prone to erosion and abrasion, making repairs difficult.
Large dimensions, requiring significant space for operation and longer opening/closing time.
Relatively complex structure.
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