Contact: General Manager Wang
Mobile: +86 13862704321
Tel: +86-513-88402039
Email：wjf@ywjx.net
Website：www.ywjx.net
Address: No. 88 Fuqian Road, Baidian Town, Haian County, Jiangsu Province, China
The circular gate valve is a commonly used shut-off valve in industrial piping systems. Its core feature is a circular-shaped gate (disc) that moves vertically up and down to achieve on/off control of pipeline media. It offers low flow resistance coefficient, reliable sealing performance, and high flow capacity. Suitable for medium-to-low pressure to high pressure, and ambient to high-temperature conditions, it is widely used in pipelines conveying water, steam, gases, oils, slurries, and various other media. It is a critical fluid control device in industries such as chemical processing, power generation, and water supply & drainage.
Core Structural Components
1. Valve Body: The main connection component to the pipeline. Material selection depends on media characteristics. Available in flange-type, wafer-type, and welded-type configurations to ensure secure pipeline connection.
2. Circular Gate: The core opening/closing component, shaped as a circular flat plate or a circular plate with flow guide holes. Material matches the valve body, and the sealing surface is precision-machined for enhanced wear resistance.
3. Valve Stem: Connects the gate to the drive device, transmitting opening/closing force. Typically made of stainless steel or alloy structural steel. For high-pressure applications, quenching and tempering treatment is applied to ensure strength and corrosion resistance.
4. Sealing Device: Consists of seat seal and stem packing seal. Seat seals include soft seals and hard seals. Stem packing seals seal the gap between the stem and valve body to prevent media leakage.
5. Drive Device: Provides opening/closing power, including manual, electric, pneumatic, and hydraulic types to suit different operating scenarios.
6. Other Components: Includes bonnet, yoke/bracket, guide mechanism, and limit stops.
Operating Principle
1. The drive device moves the valve stem vertically up and down, and the stem synchronously drives the circular gate to move along the valve body's guide mechanism.
2. When the gate is fully raised, the valve body bore is unobstructed, allowing media to pass through smoothly with minimal flow resistance.
3. When the gate is fully lowered, the gate sealing surface tightly contacts the valve seat, blocking media flow and achieving a sealed shut-off.
4. Some modulating-type circular gate valves can achieve coarse flow control by adjusting the gate lift height to regulate the flow passage area.
Key Technical Parameters
| Classification | Type | Core Features | Application Scenarios |
| Drive Mode | Manual Circular Gate Valve | Simple structure, low cost, intuitive operation; no external power required; manual opening/closing | Small-diameter pipelines, low-pressure applications, infrequent operation |
| Electric Circular Gate Valve | High degree of automation; remote control and timed opening/closing; equipped with limit switches and signal feedback; compatible with PLC systems | Industrial production lines, large-diameter pipelines, frequent operation | |
| Pneumatic Circular Gate Valve | Fast opening/closing speed, explosion-proof; relies on compressed air; low maintenance cost | Flammable/explosive environments, automated assembly lines, applications requiring fast response | |
| Hydraulic Circular Gate Valve | High output torque, strong pressure resistance; stable operation in high-pressure, large-diameter applications | Large-scale water conservancy projects, petrochemical high-pressure pipelines, large-diameter pipelines (DN ≥ 500) | |
| Seal Structure | Soft-Seated Circular Gate Valve | Excellent sealing performance, low operating torque; limited temperature and pressure resistance | Water supply & drainage, sewage treatment, food & pharmaceutical, low-temperature low-pressure neutral media |
| Hard-Seated Circular Gate Valve | High-temperature resistance, high-pressure resistance, wear and corrosion resistance; slightly lower sealing performance (Leakage Class IV) | High-temperature high-pressure conditions, media containing particulates, highly corrosive media | |
| Installation Type | Flanged Circular Gate Valve | Secure connection, good sealing; valve body with integral flanges, bolted to pipeline flanges | High-pressure applications, large-diameter pipelines, equipment outlets with significant vibration |
| Wafer-Type Circular Gate Valve | Compact size, light weight, easy installation; clamped between two flanges with bolts, no separate flanges required | Space-constrained piping, medium-to-low pressure applications, pipeline systems with DN ≤ 600 | |
| Welded Circular Gate Valve | Compact structure, high pressure resistance; valve body welded to pipeline, no leakage risk | Ultra-high-pressure applications, high-temperature pipelines, corrosive media pipelines | |
| Special Condition | Wear-Resistant Circular Gate Valve | Gate/seat made of wear-resistant alloy materials; strong abrasion resistance | Pipelines conveying media containing particulates |
| Corrosion-Resistant Circular Gate Valve | Valve body/gate made of 316L stainless steel or fluoropolymer-lined; seals resistant to acids and alkalis | Highly corrosive media in chemical industry, electroplating wastewater treatment pipelines |
