Flat Gate Valve with Diversion Hole

Your Professional Flat Gate Valve With Diversion Hole Suppliers in China

Zhejiang Advanced Technology Valve Co., Ltd. is a technology-based manufacturing enterprise, which integrates designing, manufacturing and marketing valves and owns one stop service. The company's leading products include flat gate valves with diversion holes, flat gate valves without diversion, expansion double gate flat gate valves, hard-sealed double gate flat gate valves, and special flat gate valves for alumina plants.

18 Month Warranty

We offers an 18-month warranty for each valve. Within these 18 months, if our products fail, leak, or even damage during use (excluding human factors), we will be responsible for replacing the products with quality problems and delivering them to your warehouse.

Advanced Equipment

The company has various precision machining and testing equipment, large-scale surface CNC grinders, sphere machining centers and other new technologies, as well as the first-class full-performance testing equipment in the country.

Wide Range of Applications

The valve products produced by the company are widely used in petroleum, natural gas, chemical industry, polysilicon, coal chemical industry, power station, metallurgy, papermaking, medicine, military industry and other industries.

Excellent Pre-sales Service

Our pre-sales service includes the communication and confirmation of a series of transaction terms before you place an order, including price, product drawings, trade terms, delivery date, etc. In addition, in the process of order production, we will let you know the status of the product in the form of pictures and videos to confirm the production process.

Introduction of Flat Gate Valve With Diversion Hole

The flow resistance is small, and the flow resistance of the unshrinked pipe is similar to that of the short pipe. The slab gate valve with diversion hole is installed on the pipeline and can be directly pigged with a pig. Since the gate slides on the two seat surfaces, the fluid of the flat gate valve is suitable for the medium with suspended particles, and the sealing surface of the flat gate valve is actually positioned automatically. The sealing surface of the valve seat will not be damaged by thermal deformation of the valve body. And even if the valve is closed in a cold state, the thermal elongation of the stem will not overload the sealing surface. At the same time, when the valve is closed, the slab gate valve without diversion holes does not require high precision in the closing position of the gate, so the electric slab valve can control the opening and closing position with stroke.

Product Specification

Size	2"~60"(DN50~DN1500）
Rating	ASME CLASS 150~2500（PN16~PN420）
Design Std	API6D JB/T5298
Body material	Carbon steel, stainless steel, alloy steel, dual-phase steel Connection: RF, BW, RTJ
Operation	Manual, pneumatic, electric and hydraulic
Usage	Flow control
Application	Industrial Usage
Face to Face	ANSI B16.10
Pressure-Temp	ANSI B16.34
Connection	ANSI B16.5,ANSI B16.25
Seat Material	PTFE, RPTFE, PEEK, Stainless Steel, Stellite, other material optional
Gate Material	Carbon Steel, Stainless Steel, Duplex, Hastelloy, Inconel, Monel, Alloy20, Incoloy, other materials optional
Working Temperature	-196℃~600℃
Packing	To be packed in suitable wooden cases as per client's option or customized
Shipping & Delivery	20-25 days lead time; deliver by ship from Ningbo port or Shanghai port
Notes	Serial valve connecting flange and butt-welding terminal size can be designed at customers’ request. The material of the main parts and sealing surface of the valve can be designed and selected according to the actual working conditions or the special requirements of users.

Types of Flat Gate Valves

The flat gate valve can be divided into manual flat gate valve, pneumatic flat gate valve, and electric flat gate valve according to the driving mode. According to the use and occasion, it can be divided into diversion hold flat gate valve, non-diversion hole flat gate valve, oil field flat gate valve, pipeline flat gate valve, gas flat gate valve, etc.

Design Features of Flat Gate Valve With Diversion Hole

● Design standard as per: API 6D、ASME B16.34、GB/T 19672.
● The valve disc and valve seat seal are repeatedly treated by special processes, and protected by multiple seals, and featured with anti-corrosion, penetration-proof, anti-abrasion and long service life.
● Valve seat is designed with hard-soft double seal, having reliable tightness.
● With a full bore design, both the coefficient of flow resistance and the pressure loss are very small.
● When the valve is fully opened, medium erosion occurring to its sealing face is smaller than that of other valves.
● The through conduit gate valve with diversion holes installed on a pipeline can also be cleaned by a pipe cleaner directly.
● For adjustment structure, the valve have a good flow adjusting ability.
● No space restriction on valve installation, that is, both parallel and perpendicular installations are allowed.

Flat Gate Valve With Diversion Hole Advantages

01/

The seat with O-ring seal and preload force applied to the floating valve seat structure, so that the two-way seal plate gate valve import and export; and the structure of the opening and closing torque of only ordinary valve 1/2, to achieve ease Open and close the valve.

02/

With self-sealing packing structure, without frequent regulation, on, off Extremely lightweight and reliable sealing, the packing box is equipped with an axiliary seal grease injection structure, the sealing performance is absolutely reliable, truly zero leakage; Solve the general valve packing the most easy to leak the shortcomings.

03/

At full open, the channel is smooth to a straight line, the flow resistance coefficient is minimal, no pressure loss, can be used to clean the pipeline hair ball.

04/

Out of cavity high pressure, to ensure the safety of use.

05/

Fully enclosed structure, good protective performance, can adapt to all-weather requirements.

06/

Valve actuator failure does not affect the rest of the valve, maintenance and replacement work can be carried out without removing the valve.

07/

Sealing structure of the valve seat should be elastic pre-tightening force, sealing structure at the same time downstream sealing seat. Seat and seal are always face-to-face seals.

08/

Seat has a self-cleaning function, and the valve is opened or closed during the direct flow of air erosion. Seat should be made of lubricated, non-abrasive material.

The Principle of Selection of Flat Gate Valve With Diversion Hole

● For oil and natural gas pipelines, use flat gate valves with single or double gates. If you need to clean the pipeline, use a single or double gate open-rod flat gate valve with diversion holes.
● For the transportation pipeline and storage equipment of refined oil, use a single gate or double gate flat gate valve without a diversion hole.
● For oil and natural gas mining wellhead devices, single-gate or double-gate flat gate valves with dark rod floating valve seats and diversion holes are used, most of which are API16A standards, and the pressure levels are API2000, API3000, API5000, API10000, API15000, API20000.
● For pipelines with suspended particulate media, use knife-shaped plate gate valves.
● For the city gas pipeline, use a single gate or double gate soft-seal open-rod flat gate valve.
● For urban tap water projects, use single or double gate open-rod flat gate valves without diversion holes.

Flat Gate Valve With Diversion Hole Material Selection

Gate valves are used in a wide range of applications, and they come in contact with diverse media. It is critical to consider the material used for valve construction to prevent premature valve failure and system delays during valve operation. Consider the following criteria to select the proper materials for a gate valve:
● Media composition (whether clear or filled with particles).
● Material compatibility with the media used.
● How long the valve gets exposed to the media.
● Operating pressure.
● Service temperatures.
● Effectiveness of coating on materials.
● Material availability and cost.
Gate valves are available in various materials, as discussed in the next section. Various organizations are committed to developing and maintaining standards for valves and materials in specific environments. For example, gate valves are specified by the American Petroleum Institute (API) and the National Association For Corrosion Engineers (NACE) for their suitability to work with heavy corrosive media.

Daily Maintenance Methods of Flat Gate Valve With Diversion Hole

◆ Flat gate valve shall prevent sediment from entering into running parts.
◆ If the medium in pipes includes lots of impurities, the impurity shall be cleared regularly by drain plug or small release valve of flat gate valve. When the valve, without drain valve, discharges waste, please stop transmitting medium. Before discharging, separate slowly the drain plug and discharge residual gas in the valve chamber.
◆ Flat gate valve shall be stored in the dry room, not outdoors, to avoid damage or corrosion.
◆ When the valve plate is not used frequently (less than 10 times every month), sealing grease shall be filled once every two months, and the flat gate valve shall be started and stopped once at least.
◆ Each season, lube shall be added to the valve rod sleeve, window, packing gland, and valve plate nozzle, in order to prevent parts from corrosion.
◆ After washing the flat gate valve, spray rust preventing oil on the rotation part. Add paint timely to avoid erosion.
◆ A flat gate valve uses a floating valve seat, with a two-way switch, reliable sealing, and flexible switching. Its valve plate is equipped with a guide bar that orientates accurately, the sealing surface is sprayed, and soldering is firm, gold, and anti-corrosion. The flat gate valve plate has a high bearing capacity and straight channel.
◆ When a flat valve starts, the gate channel is similar to a straight pipe with low flow resistance. Flat valve plate uses composite seal and multiple sealing, with reliable sealing and small friction. When installing a flat valve, make sure that the model and specifications of the flat gate valve are correct.

Our Certificates

We guarantee that all our products have passed the quality control and stringent regulations imposed not only by our company but also by international organizations. Our certifications assure that our product line is top grade by industry standards.

Common Problem of Flat Gate Valve With Diversion Hole

Q: What are the 2 types of gate valves?

A: Gate valves can be divided into two main types: Parallel and wedge-shaped. The parallel gate valves use a flat gate between two parallel seats, and a popular type is the knife gate valve designed with a sharp edge on the bottom of the gate.

Q: What is a slab gate valve used for?

A: This type of valve is very useful in transportation pipe lines for gas, crude oil and oil products. The Slab Gate Valve is through conduit and piggable. Slab Gate Valve has been designed to minimize pressure drop and catch foreign materials such as slurries into the disc cavity to keep clean the sealing surface areas.

Q: What are the components of a gate valve?

A: A gate valve consists of a valve body, seat and disc, a spindle, gland, and a wheel for operating the valve. The seat and the gate together perform the function of shutting off the flow of fluid.

Q: What is the difference between expanding gate valve and slab gate valve?

A: Expanding gate valves include two units-a gate and segment-in contrast with slab gate valves, which have one unit. The gate and segment units collapse against each other for travel and separate when the valve is fully opened or fully closed to affect a mechanical seal.

Q: What is the most common used gate valve?

A: Solid wedges are the most common because of their simplicity and strength. They can be installed in any position, are suitable for almost all fluids, and are practical for turbulent flow. Flexible wedge gate valves are commonly used in steam systems.

Q: What are the three common types of gate valve designs?

A: There are three types of discs used in gate valves: Flexible wedges, split wedges, and solid wedges. Like the stem, each disc has a specific use case. Wedges allow the application of greater pressure, which is why the wedge shape is common. Solid wedges are the most common.

Q: When not to use a gate valve?

A: Because of this, gate valves may not be the best choice for applications that require frequent operation or fast cycle times. Gate valves are most commonly controlled by a manual handwheel, but electric and pneumatic actuation options are also available.

Q: What is the difference between a gate valve and a wedge gate valve?

A: A wedge valve has a lower flow rate than its gate valve counterpart due to the sealing wedge being held in place between two slanted seats. Standard gate valves are linear, quarter-turn devices that regulate liquid flow. When opened, they completely block off the fluid path.

Q: Which is better ball valve or gate valve?

A: Flow Capacity: A gate valve can provide larger flow capacity than a ball valve as they are typically offered in larger diameters. Opening and closing speed: A ball valve is better suited for applications that require faster opening and closing speed or during emergencies due to its quarter turn on/off operation.

Q: What are advantages of flat gate valve?

A: The flow resistance is small, and the flow resistance without shrinkage is similar to the flow resistance of a short tube. The flat gate valve with pilot hole is installed on the pipeline and can also be cleaned directly with a vacuum cleaner. Since the gate makes the two valve seat surfaces change, the flat gate valve can also be applied to the medium with suspended particles. The sealing surface of the flat gate valve is actually automatically positioned, and the sealing surface of the valve seat is not damaged by the thermal deformation of the valve body. In addition, thermal elongation of the valve stem does not overload the sealing surfaces, even if the valve is closed in a cold state. In addition, when the valve is closed, the flat gate valve without the pilot hole does not require high precision in the flapper closing position, so the opening and closing position can be controlled by the electric flat valve stroke.

Q: What is the main use of gate valves?

A: A gate valve is generally used to completely shut off fluid flow or, in the fully open position, provide full flow in a pipeline. Thus it is used either in the fully closed or fully open positions. A gate valve consists of a valve body, seat and disc, a spindle, gland, and a wheel for operating the valve.

Q: What is a gate valve best used for?

A: Gate valves are used to isolate specific areas of the water supply network during maintenance, repair works, new installations, as well as to reroute water flow throughout the pipeline.

Q: What are the problems with gate valve?

A: The most common causes of gate valve failure are wear and the seat's and wedge's corrosion. The inner areas of a valve wear off over time, and corrosion can make the wedge stick in the open or closed position. When the handwheel is overused, the stem leading to the wedge breaks off and renders the valve useless.

Q: What is the primary application for gate valves?

A: Some common applications include: Oil and Gas: Gate valves are widely used in the oil and gas industry to control the flow of crude oil, natural gas, and other fluids in pipelines and refineries. Water Treatment: They are employed in water treatment plants to control water flow during purification processes.

Q: Why use a gate valve instead of a ball valve?

Q: What is the main disadvantage of the gate valve?

A: Assembly, start-up, and maintenance require large space. In the fully closed position, the slow movement of the slide causes high flow speed. Due to vibration and collision, abrasion and deformation occur in the seating surfaces and the surface gets damaged from friction.

Q: What is the alternative to a gate valve?

A: Compared to the gate valve, the butterfly valve-due to its specific construction-provides a much faster opening/closing action. The butterfly valve uses a fixed disc on a metal rod, which requires 90 degrees of rotation between the fully open and fully closed position.

Q: What is the difference between a gate valve and a slab gate valve?

Q: Do gate valves prevent backflow?

A: Rather than control water flow, gate valves simply allow or stop the flow of water altogether. All the while, these parts help prevent backflow, water hammer, and other harmful plumbing-related events.

Q: Does a gate valve reduce pressure?

A: Gate valves are equipped with a wedge-shaped metal gate that can be lowered to halt water flow and raised to allow flow to continue. When the gate is fully drawn up into the valve, it retracts entirely, allowing the water to flow through without any reduction in pressure.

As one of the leading flat gate valve with diversion hole enterprises in China, we warmly welcome you to buy bulk cheap flat gate valve with diversion hole in stock here from our factory. All customized our products are with high quality and competitive price.

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