Your Professional Gate Valve Manufacturer!
SND TECH is a professional manufacturer specializing in manhole covers, gratings, water meter boxes, pipe fittings, valves, and metal casting products with nearly 20 years of experience. The company integrates casting, machining, surface treatment, and assembly, offering comprehensive OEM solutions with an annual production capacity of 20,000 tons. With advanced manufacturing capabilities and strict quality control, SND TECH provides reliable products and customized services for global infrastructure and industrial projects.
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![Electric Gate Valve]()
Electric Gate ValveThis is a large-diameter, high-pressure electric gate valve. The valve body is made of WCB cast steel with a blue anti-corrosion coating. -
![ANSI Industrial Gate Valve]()
ANSI Industrial Gate ValveThe ANSI Industrial Gate Valve is a WCB carbon steel rising stem flange valve. The valve body is made of WCB carbon steel (ASTM A216 standard), the stem is made of alloy structural steel, and the -
![American Standard Flanged Gate Valve]()
American Standard Flanged Gate ValveThis is a American standard flanged gate valve. It is an industrial pipeline active on/off control device. The material is WCB carbon steel (suitable for normal temperature/medium pressure -
![Forged Gate Valve]()
Forged Gate ValveThis is a high-pressure forged flanged gate valve. The valve body is a solid, one-piece forged steel block structure (without casting parting lines, and the material is dense and uniform), capable of -
![Chemical Industry Gate Valve]()
Chemical Industry Gate ValveThis is a chemical industry gate valve made of Alloy20. The body is made of Alloy20 (a corrosion-resistant alloy, also called Alloy 20), with a metallic finish, suitable for highly corrosive
Why Choose Us
OEM & Custom Solutions
We will formulate exclusive product solutions combined with production capabilities, and provide design drawings for confirmation to ensure customized products meet project requirements.
Extensive Industry Experience
With nearly 20 years of expertise in metal casting and municipal products, we ensure consistent quality and reliable performance.
High Quality
SND has fully passed the ISO9001 quality management system certification and CE. During the production process, it implements a number of strict detailed standards and conducts full-process quality control.
Advanced Equipment
Our company has well-equipped chemical laboratories and physical performance laboratories. A complete set of testing equipment such as Direct Reading Spectrometer, Metallographic Microscope, Hardness Tester, Universal Material Testing Machine and Pressure test machine can be used to effectively control chemical composition and ensure mechanical performance.
Advantages of Gate Valve
Simple Structure and Easy Maintenance
Gate valves have a straightforward design, making them easier to manufacture and maintain. The internal structure is uncomplicated, typically composed of a gate, stem, body, and seat.
Low Flow Resistance
One of the most prominent advantages of gate valves is their low flow resistance. Since the internal passage is straight and unobstructed when the valve is fully open, the fluid can flow with minimal turbulence and pressure loss.
Lower Operating Torque
Compared to globe valves, gate valves require less torque to operate. This is because the movement of the gate is perpendicular to the direction of flow, which minimizes friction during opening and closing.
Versatile Actuation Options
Gate valves can be operated manually, pneumatically, electrically, or with gear-driven actuators, providing flexibility for various industrial environments.
High Sealing Performance
With the use of flexible graphite packing and precision machining, modern gate valves offer reliable sealing performance, even in high-temperature environments.
Lightweight and Durable Design
Constructed from advanced ductile iron, gate valves are typically 20-30% lighter than traditional models, improving installation and maintenance convenience.
Flat-Bottom Valve Seat Design
To prevent debris accumulation and leakage issues common in traditional designs, modern gate valves use a flat-bottom seat, ensuring unimpeded fluid flow.
Rubber-Coated Gate for Enhanced Seal
High-quality rubber is used to coat both the inner and outer surfaces of the gate, offering excellent memory elasticity and long-term sealing reliability.
Precision-Cast Valve Body
The precision casting process guarantees high dimensional accuracy, allowing the valve body to maintain effective sealing without additional machining.
Water and wastewater treatment: Ideal for controlling the flow of water in large-scale municipal systems.
Oil and gas industry: Gate valves are widely used to isolate parts of pipelines or refineries.
Power generation: Used for steam isolation in power plants due to their ability to withstand high temperatures.
Chemical processing: Suitable for handling a variety of chemicals under different pressure and temperature conditions.
Gate Valve Parameters
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Valve body material |
A105/WCB/F91/Alloy 20 |
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Applicable media |
Oil,Gas,Water |
|
Connection |
Flange |
|
Power |
Manual/Electric/Pneumatic |
|
Sealing Type |
Hard Seal |
|
Warranty period |
12 months |
|
Certificate |
CE ,IS09001 ,IS014001,IS045001 |
Body
This is the main pressure-retaining part of the valve and contains other operational parts such as the gate and seat. Moreover, it provides passage to flow from the valve and is connected to the piping on both ends.
Bonnet
The bonnet provides another pressure-retaining part that encloses and protects a gate valve’s stem and wedge. Generally, connects and disconnects from the body to provide access for the repair or maintenance of internal components.
Gate
The gate, sometimes referred to as a disc or obturator, moves to either obstruct or allow flow through the valve. There are several types of gate designs and technologies depending on the application’s requirements. Design types include:Wedge gate,Slab gate,Knife gate,Parallel Slide gat.
Seat
A gate valve has two seats that interface with the gate to ensure the sealing of the valve. These seats come either as part of the body or in a seat ring construction. When the seat is part of the body, then they are both made of the same material. Whereas in a ring construction, the seats threads or presses into position before welding onto the valve body.
Stem
The stem’s forged shaft transfers motion from the actuator to the gate when closing or opening the valve. A gate valve uses either a rising or non-rising stem.
Types of Gate Valve
Wedge Gate Valves
A wedge gate valve is one of the more common types you will find in widespread use across all relevant plumbing and industrial pipeline setups. Subtypes include the solid wedge, the flexible wedge, and the split wedge.
Solid wedge gate valves (or plain wedge valves) tend to be the most widely used. They are often among the simplest and cheapest options but offer good mechanical strength. They are broadly suitable for nearly all types of fluid media. Their robust, single-piece construction makes them especially appropriate for use in pipelines with turbulent fluid flow.
In wedge valves, the barrier or gate is slightly inclined against the flow path of pressurised liquid in the pipe. For this reason, they are also referred to as tapered gates. This angle creates a wedging force as the valve closes, and helps to make for a more reliable seal at higher fluid pressure ratings.
Split Gate Valves
A split gate valve, or split wedge gate valve, is a type of wedge valve in which the wedge disk itself is made from two solid pieces, held in place by a spacer or spring. This gives it the ability to self-adjust to the seats, providing added flexibility and making it easier to achieve a tighter seal with less risk of sticking or binding. They are particularly suitable for use with non-condensing gases and corrosive liquids.
Parallel Gate Valves
A parallel gate valve (sometimes called a parallel disk gate valve, or parallel slide gate valve) operates in much the same way as a wedge gate valve, but the gate features two disks placed at a 90-degree angle to the fluid flow direction. They are generally seen as safer in high temperature applications, where the parallel design is less likely to result in thermal binding.
Knife Gate Valves
A knife gate valve is a well-known type that is designed primarily for use with very thick or viscous fluids, such as slurry or powder-carrying liquid. The disks in the knife gate valve model are tapered (effectively sharpened, hence knife valves) at one end to enable them to cut and move through thicker media more easily when closing.
Flanged Gate Valves
A flanged gate valve is one where the body of the valve is flanged and bolted to the bonnet (the part on top of the valve through which the handwheel assembly connects, and which gives access to the moving parts of the valve). This tends to make them better suited to higher pressure applications than screwed connections, but less ideal than specialist pressure sealing models.
PE Packaging: Using PE film to completely wrap palletized goods. Its purpose is to waterproof, dustproof, and secure the goods.
Case Packaging: Box-type packaging, where small/precision products are packed into custom-made cases and stacked together. Suitable for protecting fragile parts.
Container: Container shipping is the most commonly used transport medium in international logistics.
Our company guarantees that the goods will be safely delivered to the customer.
FAQ
We're well-known as one of the leading gate valve manufacturers and suppliers in China, also supports customized service. Please feel free to buy discount gate valve from our factory. For price consultation, contact us.
8 Inch Gate Valve, Steel Gate Valve, Forged Gate Valve
