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Help CenterDn600 Cast Iron, Fiberglass Reinforced Plastic, and Steel Flap Gates, Customization Supported, Ample Stock Available
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Common faults and troubleshooting methods in the operation of water conservancy FRP flap gates: 1. Water leakage after the FRP flap gate is closed: Check if the sealing rubber strip is worn; 2. The opening angle of the FRP flap gate is small: In addition to adjusting the counterweight of the door leaf, check if the stainless - steel flap gate hinge is severely deformed; 3. The FRP flap gate cannot return after opening: The opening angle is too large and the limit block has fallen off. Weld the limit block back. Structure and working principle of the flap gate: It consists of four parts: valve seat, valve plate, sealing ring, and hinge. It is only used for circular and square water outlets with one - way water flow. The structure is tight, the operation is reliable, and no manual operation is required. The opening and closing force comes from the water source pressure. When the water pressure inside the flap gate is greater than the pressure outside the flap gate, it opens; otherwise, it closes. Performance of the flap gate: Applicable medium: water, river water, river water, sea water, domestic and industrial sewage. Applicable scope: Suitable for water conservancy systems, municipal sewage, urban flood control and drainage, sewage treatment plants, waterworks, etc.
Product specifications and categories: The flap gate specifications are divided into two types: circular flap gates and square flap gates, which can be designed and produced according to the size and shape of the water outlet; the flap gate categories can be divided into hollow floating plate flap gates and flat plate flap gates. Flap gate installation: The flap gate can be installed in the following ways: flange connection, concrete pouring. The allowable deviation between the center of the flap gate and the center of the flow channel should not be greater than 3.0 mm. There should be an installation space of 400 mm around the flap gate, and a 1:5 slope should be made below the flap gate outlet. Accessories for flap gate installation: Bolts or expansion screws should be made of stainless steel or carbon steel with anti - corrosion treatment; sealing parts should be made of rubber or rubber gaskets. The main manufacturing materials are FRP and cast iron. PM - type flap gates are mainly used in occasions where the requirement for pipeline pressure loss is not high. They are generally directly installed at the outlet end of the water pump and have high impact resistance. The manufacturing materials can be cast iron, FRP, or steel parts. The shape is divided into square and circular, and with a little modification, they can be used as manhole covers. FPM - type floating box flap gates, with small pressure loss in the pipeline for cast - iron moisture - proof gates, flap gates, and floating box flap gates, can be considered as substitutes for ordinary flap gates. The specific gravity of the door cover can be set, and most of them are welded parts. Composite material flap gates will be the future development direction of flap gates. Composite material flap gates take advantage of the moldable characteristics of new material technology. They have high strength and low density, which are exactly the disadvantages of traditional flap gate materials. The flap gates made of new materials are light in weight, open quickly, have small head loss, and are also price - competitive. Moreover, they generally have no recycling value, so they have good anti - theft performance. The FRP flap gate consists of four parts: valve seat, valve plate, sealing ring, and hinge. The flange on the other side of the flap gate seat is a sealing and water - stopping flange, and its surface has a U - shaped groove with a Y - shaped sealing rubber strip embedded in it. An imported * adhesive is applied between the sealing rubber strip and the FRP, and the bonding is firm. It has excellent water - resistance performance and will not fall off due to long - term immersion and frequent opening. The sealing rubber strip is made of imported rubber raw materials and is vulcanized and formed in a fluidized bed. Its form, flexibility, and sealing performance have been explored and practiced by our factory for many years and continuously improved. The sealing effect is very ideal. Its flexibility can reduce the impact force of the flap gate cover on the flap gate seat due to instantaneous backwater, protecting the flap gate seat and the flap gate cover. Therefore, the rubber strip plays a dual role of sealing and buffering. Cylindrical FRP flap gates are only used for cylindrical and square water outlets with one - way water flow. The structure is tight, the operation is reliable, and no manual operation is required. The opening and closing force comes from the water source pressure. When the water pressure inside the flap gate is greater than the pressure outside the FRP flap gate, it opens; otherwise, it closes. The detailed product parameters of the FRP flap gate are as follows: Caliber specifications: Circular DN200 - 2600mm, square 300 - 3000mm. Working medium: Industrial and domestic sewage with acid - base properties, sea water, etc. Working temperature: Below 60 degrees. According to the usage requirements, the flap gate can be designed to withstand a temperature of up to 100 degrees. Working pressure: Normal pressure to 0.25MPa. Sealing ring form: Lip - shaped seal, hollow circular tube seal. Opening angle of the flap gate cover: >60 degrees. Barcol hardness: 30 - 40. Specific gravity: 1.8 - 1.9. Service life: More than 10 years
Hebei Yangyu Hydraulic Machinery Co., Ltd. mainly deals in cast iron gates, cast iron flap gates, cast iron gates with copper inlays, concealed stem cast iron gates with copper inlays, square cast iron gates, steel gates, steel flap gates, flap gates, integrated steel gates, stainless steel gates, stainless steel flap gates, fiberglass flap gates, fiberglass floating box flap gates, square fiberglass flap gates, screw hoists, hand-operated hoists, side-shaking hoists, handwheel hoists, horizontal pushing hoists, direct-connection hoists, double-suspension point hoists, ql hoists, rubber waterstops, sewage cleaners, winches, trash racks, rake sewage cleaners, circular grid sewage cleaners, hdep flap gates, polymer flap gates, and sewage flap gates. The specifications of flap gates are divided into two types: circular flap gates and square flap gates, which can be designed and produced according to the size and shape of the water outlet; they can be respectively hollow floating plate flap gates and flat plate flap gates.
It is a one-way valve suitable for pipes, sewage treatment, and the outlets of drainage pipes on river banks. It has the functions of automatic opening and closing; it has good water-stopping and anti-backflow performance; the composite material flap gate is highly corrosion-resistant and easy to install and manage. The composite material flap gate is light in weight, corrosion-resistant, ***; it has no recycling value **, which effectively prevents theft; it increases the opening angle and greatly reduces the opening and closing force of the flap gate; it has superior mechanical properties, strong designability, and reliable operation. The water outlet of the composite material flap gate can be circular or rectangular, with a tight structure and reliable operation. It does not require manual operation and can be connected by flanges or fixed with embedded parts. The specifications of flap gates are divided into two types: circular flap gates and square flap gates, which can be designed and produced according to the size and shape of the water outlet; they can be respectively hollow floating plate flap gates and flat plate flap gates. It is a one-way valve suitable for pipes, sewage treatment, and the outlets of drainage pipes on river banks. It has the functions of automatic opening and closing; it has good water-stopping and anti-backflow performance; the composite material flap gate is highly corrosion-resistant and easy to install and manage. The fiberglass flap gate is a new type of check valve to prevent backflow, mainly used in water plants, rivers, etc. It includes cast iron flap gates, steel flap gates, stainless steel flap gates, etc. The new fiberglass flap gate not only has many advantages such as light texture, firm structure, theft prevention, corrosion prevention, and low maintenance cost, but also is deeply loved by customers. Parameters of fiberglass flap gate The fiberglass flap gate is only used for circular and square water outlets of one-way water flow, with a tight structure and reliable operation. It does not require manual operation. The opening and closing force comes from the water source pressure. When the water pressure inside the fiberglass flap gate is greater than the pressure outside the flap gate, it opens; otherwise, it closes. Nominal pressure: 0.1MPa - 1.0MPa? Applicable medium: water, river water, river water, sea water, domestic and industrial sewage? Applicable temperature: ≤50℃? Scope of application? It is suitable for water conservancy systems, municipal sewage, urban flood control and drainage, sewage treatment plants, water supply plants, etc. Installation requirements for fiberglass flap gates The flange-connected fiberglass flap gates are divided into three types: wing ring pipe flange connection, embedded bolt flange connection, and expansion screw flange connection. Steel flap gates usually refer to flap valves cast or welded with carbon steel. Steel flap gates have the characteristics of traditional metal flap gates. Steel flap gates are mainly installed at the end of drainage and sewage pipes. Steel flap gates have the functions of automatic opening and closing; steel flap gates have good water-stopping and anti-backflow performance. According to different materials, steel flap gates mainly include carbon steel flap gates and stainless steel flap gates, which are respectively suitable for different working environments and engineering needs. Detailed information of pipe flap gates DN300, 400, 500 Cast iron flap gates are mainly installed at the end of drainage pipes to prevent the backflow of external water. The materials are divided into various materials such as stainless steel, cast iron, section steel, fiberglass, and composite materials. This product is developed by our company independently. Cast iron flap gates are mainly installed at the end of drainage pipes to prevent the backflow of external water. The materials are divided into various materials such as stainless steel, cast iron, section steel, fiberglass, and composite materials. This product is developed by our company independently. This product is based on the industry technical standard Q/TF - B2771; it is tested according to the test requirements of GB/T13927; the nominal pressure (PN) of the equipment: 0.25 - 1.6Mpa; the nominal diameter (DN): 200 - 2000mm. It is a one-way valve installed at the outlet of the drainage pipe on the river bank. When the river tide level is higher than the outlet of the water pipe and the pressure is greater than the pressure inside the pipe, the flap gate panel closes automatically to prevent the river tide from flowing back into the drainage pipe. The leading products of our factory are: QL0.5 - 50T single-suspension point and double-suspension point screw hoists. They have the types of hand-pushing with lock, closed hand-operated, hand-pulling, and dual-purpose of hand and electricity. QPQ, QPK5 - 160T fixed, mobile, single and double-suspension point winch hoists. The gates include PZ, PGZ type cast iron gates, cast iron gates with copper inlays, regulating weir gates, circular cast iron flap gates, square cast iron flap gates, stainless steel weir gates, cast iron round gates with copper inlays, cast iron square gates with copper inlays, MXY type open stem cast iron round gates with copper inlays, sluice gates, fiberglass flap gates, stainless steel gates, flap gates (tide gates), weir gates, steel structure gates (arc gates, plane sliding gates, plane fixed wheel gates), with specifications of: 0.2×0.2 - 10×10 meters, including two-way water-stopping gates, reverse water-stopping gates, deep-water gates, high-pressure sealed box-type gates, and various rubber waterstops. Now the products have been sold to more than 20 provinces, municipalities, and autonomous regions across the country. They are widely used in water conservancy projects such as irrigation and drainage, hydropower stations, rivers, aquaculture, reservoirs, and sewage treatment. Our factory provides you with high-quality products, and the quality is ***. We sincerely welcome new and old customers to visit our factory for inspection and negotiation of cooperation.
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