Hydraulic Shutoff Gate(Hydraulic isolation gate)
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Hydraulic Shutoff Gate(Hydraulic isolation gate)

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General Introduction
GDM-n series hydraulic shutoff gate is used to isolate the system while the slag handling system of the boiler is under maintenance. It can store and carry slag amount to the quantity discharged in 4 - 6 hours under MCR condition burning the design coal. The shutoff gate can close tightly and no ash leaking and no obvious air leaking, which can ensure the good sealing of the furnace to guarantee the normal operation of boiler. It is usually hanging installed under the boiler bottom slag well by flange or welding connection, and working together with the slag conveyor and slag well.
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Model and Meaning

DGM - n: n refers to number of the gate.

3 Characteristics of Structure

A) Adopt advanced electrohydraulic   control system

The shutoff gate adopts advanced electrohydraulic control system, which makes the operation flexible and easy and the working reliable. The hydraulic system has no oil leaking and has a high working pressure and quick actions. The shutoff gate adopts electric interlock control, which means operate each control cabinet in the pre-set sequence to close and open the gate normally, if the operation is wrong, the electric part will not give feedback.

B) Equip the oil cylinder of the shutoff gate with mechanical non-return lock

The hydraulic shutoff gate has double protection from the hydraulic lock and the mechanical non-return lock. The protection can avoid the opening of gate due to hydraulic defect caused by oil leaking, so as to ensure the safety and reliability under the maintenance of the shutoff gate.

C) Side door interlocked structure

The hydraulic shutoff gate adopts inner and outer side door interlocked structure. This structure can make the doors have no gaps to ensure the gate close tightly, reduce the air leaking from the furnace, guarantee the stable combustion, and improve the combustion efficiency of boiler.

D) The shutoff gate is lined with anti-corrosion insulation layer

The shutoff gate is lined with fire-proof and anti-corrosion concrete, making it have a long service life and not easy to deform under heating condition, and the clearance between the aprons is small, and sealing is good.


Hydraulic Shutoff Gate, a reliable and efficient solution for preventing the dry ash falling from the boiler furnace. Crafted with high-quality cast iron, this gate is built to withstand the toughest conditions while ensuring long-lasting performance.

With its corrosion-resistant properties, our Hydraulic Shutoff Gate guarantees durability even in harsh environments. Rest assured that this gate will continue to function optimally, providing a reliable solution for preventing the dry ash falling from the boiler furnace.

Operating this gate is a breeze, thanks to its easy-to-operate design. Whether you're a seasoned professional or a novice, you'll find our Hydraulic Shutoff Gate user-friendly and intuitive. Its flexibility allows for seamless integration into various systems, making it a versatile choice for a wide range of applications.

Safety is our utmost priority, and our Hydraulic Shutoff Gate is designed with this in mind. Equipped with advanced safety features, you can trust that this gate will operate smoothly and securely, minimizing any potential risks.

Leakage is a common concern when it comes to preventing the dry ash falling, but with our Hydraulic Shutoff Gate, you can bid farewell to such worries. Its leak-proof design ensures that your operations remain efficient and reliable, saving you time and resources.


Qingdao Kechengyi Environmental Protection and Electric Power Technologies Co. LTD (KCY) is a comprehensive enterprise focusing on equipment research & development...

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Add: Sanlihe Industrial Park, Jiaozhou City, Qingdao, Shandong Province
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