Home - Products - Special Flat Gate Valve - Details

Adjustable Flat Gate Valve

Name: China Customized Adjustable Flat Gate Valve - Discount Adjustable Flat Gate Valve in Stock - Advanced Technology Valve
Brand: Advanced
SKU: 229385220

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.

Send Inquiry

Description

Your Professional Adjustable Flat Gate Valve Suppliers in China

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.

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.

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.

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 Adjustable Flat Gate Valve

The flat gate valve is a sliding valve whose closing part is a parallel gate. The closing member can be a single gate or a double gate with a distraction mechanism in between. The pressing force of the gate to the valve seat is controlled by the medium pressure acting on the floating gate or the floating valve seat. If it is a double gate plate gate valve, the expansion mechanism between the two gates can supplement this pressing force. 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.

Our Related Products

Rising Stem Flat Gate Valve

It has the advantages of simple and compact structure, reasonable design, reliable sealing, light and flexible operation, small size, smooth channel, low resistance, easy installation and easy disassembly.

Dark Rod Flat Gate Valve

When the valve is fully opened, the flow resistance coefficient is very small, and the valve will eliminate the function of the valve disc and the dirt on the sealing surface every time the valve is opened and closed.

Normal Temperature Flat Gate Valve

Gate valve is a commonly used pipeline valve, and its working principle is to control the flow of the medium by lifting the gate plate. Gate valve has simple structure, good sealing performance and small flow resistance, and is widely used in various industrial fields.

Insulation Flat Gate Valve

The packing is made of flexible graphite ring and graphite packing, reliable sealing, light and flexible operation.

Fire Slab Gate Valve

It is widely used in oil and water steam pipelines such as petrochemical industry and thermal power plants to connect or cut off the intermediate quality of pipelines.

Bellows Flat Gate Valve

The use of bellows as a sealing element can adapt to the temperature, pressure and corrosion of different media to ensure the sealing performance of the valve.

Adjustable Flat Gate Valve

Changed the traditional gate can only be fully open or trap, can not be adjusted and throttling, need to install another valve for adjustment and throttling, can not meet the needs of the use of pipelines.

Buried Slab Gate Valve

It can be installed in the ground, which can save the cost of digging and fixing the wall of the large-caliber ground well, and the surface exposure range is small, which will not affect the beautification of the road, saving investment and eliminating the safety problems caused by the loss of the ground well cover.

Cryogenic Slab Gate Valve

Low temperature valve refers to the medium temperature of -40℃~-196℃ valve, common low temperature valves are divided into low temperature butterfly valve, low temperature gate valve, low temperature ball valve, low temperature globe valve, low temperature check valve, low temperature throttle valve and so on.

Product Specification

Size	From 2″ to 48″
Pressure	150 – 1500LB
Material	WCB, LCB, WC6, WC9, CF8, CF3, CF3M, and CF8M
Design and production standard	API 600, API6D and ASME B16.34
End to End	ANSI B16.5, ASME B 16.47, ANSI B 16.25
Test Standard	API598, API6D
Actuation	Can operate with lever, gear box, pneumatic or electric actuator with handwheel for emergencies.
Medium	The valve is suitable for several media including water, steam, oil, gas, petrol products, nitric acid, acetic acid, etc.
Working temperature	From -46ºC or -50ºC (stainless steel constructions) and -29ºC (carbon steel constructions) up to 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.

How Does an Adjustable Flat Gate Valve work

The valve is an asymmetrical flat valve body structure. It combines the valve body and valve cover of the ordinary gate valve into one. And the sanitary valve body is designed into a flat square. This kind of design reduces the structural size of the valve body, saves the number of connecting bolts between the valve body and the valve cover, effectively reducing the weight of the valve.

The valve seat uses a stand-alone design, combining the valve seat and valve interface of the ordinary gate valves into one. For the same valve body, replacing different valve seats can simply change the type of interface of the valve. This effectively improves the commonality and maintainability of the valve body, while avoiding the problem in which deformation of the valve body under high pressure results in the poor sealing performance of the valve.

Standard Specifications

API 600

Bolted Bonnet Steel Gate Valve for Petroleum and Natural Gas Industries.

DIN3352

Bolted Bonnet Steel Gate Valve for Petroleum and Natural Gas Industries.

ASME B16.10

Face to Face and End to End Dimensions of Valves.

BS 1414

Specification for Steel Wedge Gate Valves (Flanged and Butt-welding Ends) for the Petroleum, Petrochemical and Allied Industries.

MSS SP-25

Standard Marking System for Valves, Fittings, Flanges and Unions.

ASME B16.47 Series A

Large Diameter Steel Flanges: NPS 26 Through NPS 60 Metric/Inch Standard.

ASME B16.34

Valves Flanged, Threaded and Welding Ends.

ASME B16.5

Pipe Flanges and Flanged Fittings: NPS 1/2 through 24.

ASME B16.25

Buttwelding Ends.

Structural Features of Adjustable Flat Gate Valve

This series of products adopt the new floating seal structure, which is suitable for the opening, closing and adjusting devices of control media such as oil and natural gas with pressure less than 15.0MPa and temperature from -29 ℃ to 121 ℃. The product has a novel structural design and material selection. Appropriate, rigorous test, light operation, strong anti-corrosion, abrasion resistance and erosion resistance. It is an ideal new equipment in the petroleum industry.
● Adopting floating valve seat, two-way opening and closing, reliable sealing and flexible opening and closing.
● The gate is provided with guide strips for precise guidance, and the sealing surface is spray welded with carbide, which is resistant to erosion.
● The valve body has a high load-bearing capacity and the channel is straight-through. When fully opened, it is similar to the gate diversion hole and the straight pipe, and the flow resistance is very small. The valve stem adopts composite filler, multiple seals, making the seal reliable and low friction.
● When closing the valve, turn the handwheel clockwise to move the shutter down to the bottom. Due to the pressure of the medium, the inlet seal seat is pushed towards the direction of the shutter to form a larger seal specific pressure, thus forming the first seal. At the same time, the shutter is pressed against the sealing seat at the outlest end to become a double seal.
● Due to the double seal, the consumable parts can be replaced without affecting the work of the pipeline. This is an important feature that our products take priority over similar products at home and abroad.
● When the gate is open, turn the hand wheel counterclockwise, the gate moved up, and the diversion hole and channel hole intersect. With the rise of the gate, the through hole gradually increases, and when the limit position is reached, the diversion hole and the passage hole coincide, and they are fully opened at this time.

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 Adjustable Flat Gate Valve

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

A: One of the biggest differences between an expanding gate valve and a non-expanding valve is that an expanding gate valve has reduced or even zero friction on seats while cycling. A non-expanding gate valve, such as a slab gate or a wedge gate, has friction on the sealing surfaces.

Q: Should gate valve be fully open?

A: Gate valves are one of the most common valves used as a main shut off valve. They are reliable and long-lasting. Gate valves have a twist-type handle and should only be used to fully open water supply or completely shut off water supply. Using these valves to regulate the flow of water can wear them out.

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: How much pressure can a gate valve handle?

A: The main purpose of gate valve is to shut off the flow of fluids in a system. The valve is designed to be in either a fully opened or fully closed position. It is suitable to apply in low pressure application and the pressure rating can be up to 150 PSI working pressure.

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.

Q: What is the advantage of using a gate valve?

A: Gate valves have dual flow directions. They're not limited to one-way flow, nor are they subject to the flow directions of the medium. Therefore, gate valves are suitable for use in pipelines where the flow direction may change. Plus, they are easier to install than other more sophisticated types of valves.

Q: Why do gate valves fail?

A: Gate valves can become stuck in the open or closed position due to rust, debris, or lack of lubrication. When a valve is stuck, it cannot perform its intended function.

Q: Why does my gate valve spin but not open?

A: A gate valve has a stem, and if the stem turns and turns for you while not exerting any control over the water flow either way, there's a good chance that the stem is broken off at the gate or the threads on the stem have been stripped to the point that they no longer operate the way they're supposed to.

Q: What materials are used in gate valves?

A: Gate valves are typically constructed from cast iron, cast carbon steel, ductile iron, gunmetal, stainless steel, alloy steels, and forged steels. All-metal gate valves are used in ultra-high vacuum chambers to isolate regions of the chamber.

Q: What materials are used in gate valve seats?

A: The seats can also be metal-to-metal with Stellite or TCC coating. To facilitate assembly and on-line maintenance, the design usually includes "wings". Sizes range from 1/2" to 72" and materials can vary from carbon steel to nickel alloys.

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 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: Should you throttle a gate valve?

A: Gate valves are not intended for throttling. They are designed such that media flowing at high velocity can vibrate and quickly erode or tear a partially-open valve disc off its seat. In a pinch, gate valves should only be used for throttling when the gate is 90% closed.

Hot Tags: adjustable flat gate valve, China adjustable flat gate valve, Copper Alloy Flat Gate Valve, Stainless Steel Flat Gate Valve, Nickel Alloy Flat Gate Valve, Hydraulic Flat Gate Valve, Double Plate Flat Gate Valve Without Diversion Hole, Special Flat Gate Valve

Previous:Cryogenic Slab Gate Valve

Next:Rising Stem Flat Gate Valve

Send Inquiry