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Wafer Flat Gate Valve

Name: China Customized Wafer Flat Gate Valve - Discount Wafer Flat Gate Valve Made in China - Advanced Technology Valve
Brand: Advanced
SKU: 229396491

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.

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Description

Your Professional Wafer Gate Valve 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.

Advanced Equipment

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.

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 Wafer Gate Valve

They perform their duties by opening and closing the fluid passage between the two sealing rings with a knife (slider) perpendicular to the transition direction. It is preferable to work fully open or fully closed. They are not suitable for precise flow control. It is a type of valve suitable for use in more fibrous fluids, eg paper industry and wastewater lines. It is fully sealed with one piece body and elastomer (EPDM, NBR, NR). It can also be produced according to its fluid properties. It can be flywheel, gear box, chain wheel, pneumatic actuator and electric actuator. There is rising and non-rising alternatives.

Our Related Products

Flanged Slab 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.

Forged Steel Flat Gate Valve

Bolt-type valve cover refers to the valve body and valve cover with bolts and nuts connected, wound gasket (stainless steel wire clamp flexible graphite) sealed. Customers have special requirements can also use metal ring connection.

Nickel Alloy Flat Gate Valve

Nickel Alloy Valves have high amounts of nickel. Nickel, as a corrosion resistant element, provides the material with high corrosion resistance; especially against acids. So the nickel alloy valves are used in chemical and petrochemical industries much.

Chemical Grade Flat Gate Valve

The chemical valve is an important accessory for controlling the flow of media on the chemical pipeline. The detailed principle and structural section view refer to the relevant information books. The valve is composed of three parts: the valve body, the opening and closing mechanism and the valve cover.

Forged Welded Flat Gate Valve

The valve body adopts separate forging and welding forming, high strength, especially for high-pressure large-diameter valves, the processing difficulty is small, through forging can eliminate the defects such as as-cast loose produced in the smelting process of metal, optimize the microstructure, and because of the preservation of the complete metal flow line, the mechanical properties of the forging are generally better than the castings of the same material.

Plate Welded Flat Gate Valve

There are many types of connection between the valve stem and the valve stem nut. From the valve stem nut, it is divided into fixed valve stem nut and rotating valve stem nut two categories. From the fixed position of the fixed valve stem nut, it is divided into: the upper valve stem nut fixed on the support; Middle stem nut fixed on valve cover; Lower valve stem nut secured to the closing member.

Slab Gate Valve For Oil Field

Suitable for natural gas, petroleum, chemical, gas pipelines and other transmission lines, vent systems and steam storage devices, used as opening and closing equipment. Long haul pipeline for natural gas extraction and purification.

Full Bore Slab Gate Valve

A full bore valve refers to a ball valve that can open completely when the actuator moves, creating a clear, unobstructed path for the fluid to pass through the pipe where the valve is used.

Slab Gate Valve For Sewage System

Slab gate valves are comprised of a single gate unit which raises and lowers between two seat rings. Due to the fact that the gate slides between the seats, slab gate valves are suitable for the medium with suspended particles.

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.

Design Features of Wafer Gate Valve

01/

Body
Full port design minimizes pressure drop and maximizes flow capacity.
Packing at both top and bottom eliminates leakage to surrounding.

02/

Other
Double thrust bearing minimizes the operating torque.

03/

Gate
Though gate with o-port cut through a disc of media down when closing and return this portion back when opening.
This prevent media from clogging in the valve body cavity.
Gate thickness can be increased to handle higher working pressure.
Gate surface is well polished at both sides for tight seal and less jamming.
Gate is hard chrome coated for better abrasion resistance.

04/

Seat
Side-entry seat is replaceable, reducing the cost of maintenance.
Seat retainer covers the side of seat and prevents seat from direct flow flushing.
Preloaded seat is adjustable to meet different sealing class and compensate normal seat wear.
With seats on both sides, valve can handle flow in both directions 100%.

Advantages of Wafer Gate Valve

Pass-through design.

Bi-directional valve with a packingless design.

360-degree groove along inner sleeve surface allows for axial flexibility.

Full port bore formed by 2 heavy-duty elastomer sleeves with an embedded stiffener ring to maintain sleeve shape and prevent wear and tear.

Yoke design prevents slurry splatter and allows for easy mounting of proximity or limit switches and other accessories.

Top bracket design accommodates manual, pneumatic, hydraulic or electric actuation with no modifications needed.

Applications of Wafer Gate Valve

Wafer Knife gate valves are generally used for the circulation of media such as paper pulp, coal ash, chemical materials, sewage, and foodstuffs. The stainless steel wafer knife gate valve has the remarkable advantages of light switch, good sealing, good elastic memory, and long service life. It can be widely used in water, sewage, construction, petroleum, chemical, food, medicine, light textile, electric power, ship metallurgy, energy system and another body pipeline as a regulating and intercepting device.

Quality Control Process

Body Test
1.5 times the working pressure with water. This test is performed after valve assembly and with disc in half position
open, it is called as a body hydro test.

Seat Test
1.1 times the working pressure with water.

Function/ Operation Test
At the time of final inspection, each valve and its actuator (Flow-Control Lever / Gear / Pneumatic Actuator), under goes a complete operating test (Open/Close). This test carried out without pressure and at ambient temperature. It ensures the correct operation of the valve / actuator assembly with accessories such as solenoid valve, limit switches, air filter regulator etc.

Special Test
On request, any other test can be carried out according to special instruction by client.

What are ANSI and AWWA for Wafer Gate Valves

ANSI Standard
ANSI is the abbreviation of the American National Standards Institute, which is a non-profit organization that sets general standards of the quality, the process, and the system of all the industrial products in the United States. There are thousands of regulations that impact almost every industrial sector in the USA, including the valve production industry.
What does the ANSI valve mean: it refers to the valve that falls under the ANSI standard of 1600 that governs the gate valve in any industry that makes use of them.
This ANSI standard contains descriptive information such as repair procedures, valve dimensions, the wall thickness of the valve and the inspection processes, etc.

AWWA Standard
The AWWA is the abbreviation of the American Water Works Association that publish its first consensus documents in 1908. Nowadays there are 180 AWWA standards covering nearly all areas of water treatment and supply, such as water sourcing, water storage, treatment, and distribution, etc. More specifically, the AWWA regulates the materials, equipment, and practices used in water treatment and supply, including valve production. Both the AWWA and ANSI have thorough standards for flanges of gate valves, but there are differences: ANSI is aimed at industrial flange installations while the AWWA standard focuses on the flange for potable water. Besides, the ANSI includes the welded auxiliary connections information while the AWWA doesn't address those installations.

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 Wafer Gate Valve

Q: What sizes are knife gate valves available in?

A: Knife gate valves are available in a wide range of sizes, typically ranging from 2 inches to 60 inches in diameter. The size of a knife gate valve is determined by the diameter of the pipeline it is intended to be used with. The size of the valve should match the size of the pipeline to ensure proper flow control and a secure fit. It's important to note that the actual dimensions of a knife gate valve can vary depending on the manufacturer and the specific model. Some manufacturers offer custom sizes to accommodate unique pipeline requirements. Additionally, some knife gate valves are designed for specific applications, such as slurry control or high-pressure applications, and these may have different size ranges or specifications.

Q: How does a wafer valve work?

A: These valves feature a hinged, flap-like disk (the wafer) that is used to allow and restrict liquid flow. This disk only opens in one direction and closes shut under back pressure to seal the valve against opposing fluid flow.

Q: What is a wafer knife gate valve?

A: Our standard wafer knife gate valve is used within many different fields of applications. The special shut-off technique of this valve makes it suitable for both fluids and dry media such as pulp, sludge, biomass, powder and different kinds of waste.

Q: What is the top of a gate valve called?

A: The gate valve differs from ball, plug and butterfly valves in that the closure element, called the disc, gate, or obturator, rises on the base of a stem or spindle out of the waterway and into the valve top, called the bonnet, by means of multiple turns of the spindle or stem.

Q: What is the difference between a wafer and a flanged valve?

A: The biggest difference is of course that the flanged butterfly valve has two more flanges, and the wafer type has two fewer flanges. Of course, the price is cheaper, and the price is about 2/3 of the flange.

Q: What is the difference between a wafer valve and a lug valve?

A: One of the main differences is in the way they are installed. Wafer butterfly valves are sandwiched between two flanges and held in place with bolts, while lug style butterfly valves have threaded inserts that allow them to be bolted directly onto the pipeline, making them more secure.

Q: What is a flap gate valve?

A: Flap Valves, sometimes referred to as Flap Gates, are put on the end of a flanged pipe to allow the flow of water out of the pipe, but prevent anything from flowing back in, such as sticks, leaves or other debris.

Q: What is the difference between a butterfly valve and a wafer valve?

A: Wafer-style valves offer advantages due to their ability to fit in tight spaces, ease of installation with minimal effort and easy maintenance with fewer moving parts. Lug-style butterfly valves provide greater strength, better flow rate and can handle higher pressure than wafer designs.

Q: What is the difference between a wafer and lugged knife gate valve?

A: Lug butterfly valves are constructed from metals such as ductile iron or steel and feature threaded lugs on their flanges for bolt connections. Wafer-style butterfly valves lack lugs and instead feature four holes that align with pipe flanges.

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

A: One of the differences between the gate and the knife gate valves, is that the knife gate valve often has a sharpened disc to better cut through slurry/viscous media. Also, the knife gate valve has a short face-to-face length compared to a gate valve, which is dimensionally wider.

Q: What is the obturator in a gate valve?

A: The obturator in Gate is usually wedge-shaped. When the valve is wide open, the gate is fully drawn into the valve bonnet. This leaves the flow passage through the valve fully open with no flow restrictions. Therefore, there is little or no pressure drop or flow restriction through the valve.

Q: Do wafer valves need gaskets?

A: Generally speaking, although the connecting surfaces on both sides of the soft seal wafer butterfly valve can play the role of flange gasket, it is recommended to add a gasket on both sides for safety.

Q: What is a wafer type valve?

A: Most wafer-style butterfly valves are engineered with four holes that align with the connected pipeline. The valve is designed to clamp between two flanges in your pipe work. Most wafer butterfly valves fit the majority of flange standards.

Q: What is a wafer connection type?

A: Wafer style flange connections are typically reserved for butterfly valves due to there slim profile. They can, however, also be found on ball valves from some manufacturers. This connection type simply sqeezes the valve between 2 flanges using long bots or threaded end rods.

Q: What is a wafer type butterfly valve connection?

A: Wafer type is a connection method of butterfly valve, that is, when installing on the pipeline, it is necessary to clamp the butterfly valve with two pieces of flanges, and then connect it with the flange on the pipeline. Corresponding to it is another connection method of butterfly valve, flange type.

Q: What is the difference between a wafer and a flange?

A: The flange is a ring-shaped device designed to be used as an alternative to welding or threading various piping components, including the valves. Alternatively, a wafer design is defined as a flangeless design with facing that permits installation between ASME and manufacturer-standard (MSS SP) flanges.

Q: Why use butterfly valve instead of gate valve?

A: Butterfly valves offer more cost-effectiveness in most sizes and materials compared to gate valves, plus they're lighter, which makes them suitable for applications involving larger pipe diameters.

Q: Is a wafer valve the same as a flanged valve?

A: Flange butterfly valves are more reliable than wafer butterfly valves. Wafer butterfly valves are not as convenient as flanged butterfly valves in installation, because they need to be equipped with flanges, which can easily leak if they are not installed well.

Q: What is the difference between a wafer and a lug valve?

A: Operation. Lugged butterfly valves feature threaded inserts (lugs) outside the valve that attach to piping flanges using bolted connections. This design allows one side of the piping system to be disconnected without interfering with another. Wafer butterfly valves do not feature attachment lugs.

Q: What do the parts of a typical gate valve include?

A: Most gate valves consist of a body and bonnet that contains a closure element, called a disc or a gate. The closure element is attached to a stem that passes through the bonnet of the valve, ultimately interfacing with a handwheel or other actuation device to operate the stem.

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