Parallel Flow Hole Gate Valve

The Parallel Flow Hole Gate Valve is a specialized sliding valve that utilizes parallel gate discs with highly polished flat sealing surfaces to achieve tight mating with the valve seat, primarily used for shutting off or connecting media flow in industrial pipelines. Its unique flow hole design (also known as a vent hole) distinguishes it from standard parallel gate valves, providing pressure relief, seat protection, and support for pigging operations in long-distance pipelines. Available in vented (with flow hole) and non-vented configurations, this valve is tailored to meet the diverse needs of different pipeline systems, from power plant piping to oil and gas trunk lines.

1.Superior Sealing Performance : Adopts a dual-parallel-disc design with floating seats and pre-loading, ensuring bidirectional sealing reliability. The highly polished sealing surfaces of the gate discs and seats (made of reinforced graphite, PTFE, or hardfaced alloy) prevent media leakage even under high pressure, complying with strict industrial sealing standards.

2.Flow Hole Design Benefit : The integrated flow hole (vent hole) in the lower disc of vented models allows for pressure relief, protecting the valve seat from direct media erosion and extending service life. When fully open, the flow hole aligns with the pipeline, enabling smooth flow and facilitating pigging operations in oil and gas trunk lines.

3.Low Flow Resistance : Features a full-bore design where the gate's bore equals the pipeline's inner diameter, minimizing pressure drop and ensuring high flow efficiency. The theoretical flow resistance coefficient ranges from 0.1 to 0.3, making it ideal for large-diameter pipelines and high-flow applications.

4.Durable & Corrosion-Resistant : Valve body and gate discs are crafted from high-quality materials such as carbon steel (WCB), stainless steel (304/316), and alloy steel, ensuring resistance to corrosion, wear, and high temperatures. The yoke sleeve is made of aluminum bronze to reduce operating torque, enhancing overall durability.

5.Flexible Drive Options : Supports manual, electric, or pneumatic drive mechanisms, all complying with API 6D standards. Explosion-proof options are available for hazardous environments, while electric and pneumatic actuators enable automatic control for improved operational efficiency.

6.Easy Maintenance : Welded seat rings and replaceable gate discs simplify maintenance, reducing downtime and operational costs. The valve's structure allows for in-line maintenance in many cases, eliminating the need for complete pipeline disassembly.

- Oil & Gas Industry : Oil and gas trunk lines, piggable pipelines, offshore platforms, and refineries. Vented models are ideal for long-distance pipelines requiring pressure relief and pigging operations.

- Power Plants : Piping systems, pump inlets/outlets, and steam pipelines. Non-vented models are well-suited for sealed systems without pigging needs.

- Chemical Industry : Chemical processing pipelines, corrosive media transportation, and sulfur-containing media (sulfur-resistant models available).

- Water Treatment : Municipal water supply, sewage treatment, and industrial water pipelines.

- Other Industries : Metallurgy, urban construction, environmental protection, and any pipeline system requiring reliable shut-off and low flow resistance.

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