Among the most commonly employed cutoff valves, the electric gate valve is primarily utilized for connecting or isolating the medium within pipelines rather than for adjusting the flow. It is well-suited for a broad range of pressures, temperatures, and calibers, particularly in medium to large diameter pipelines.
Benefits of Electric Gate Valves
Fluid Resistance
Electric gate valves offer a very small fluid resistance. The minimal fluid resistance is due to the straight inner media channel of the body which allows the medium to flow directly through the valve without changing direction. As such, the flow's path is unobstructed.
Minimal Erosion
In comparison to other valve options, electric gate valves typically experience less erosion on their sealing surface when they are fully open. This minimal erosion is largely attributed to the valve's tight seal functioning.
Energy-efficiency
Electric gate valves are an energy-efficient valve option, as the movement direction or ram is perpendicular to the media flow direction. As a result, less power is consumed when opening or closing the electric gate valves in comparison to globe valves. Due to their energy-efficiency, they help reduce total ownership cost.
Dual Flow Direction
Electric gate valves have the capacity to be used in any direction in the circuit. In other words, their media flow is unobstructed for all directions of the valve body and they aren't subject to the medium's directional flow. This makes them ideal for use in pipelines where the flow direction may change depending on the medium.
Simple Body
Electric gate valves are composed of a relatively simple body. Therefore, they are easier to operate compared to isolation valves with more complex designs.
Minimum Pressure Loss
Due to the laminar flow that they provide, the pressure loss of electric gate valves is minimal. It's always helpful when pressure loss can be mitigated.
Cryogenic gate valve is an opening and closing device used for fully opening and fully closing.
Cast steel gate valves are used in body pipelines as regulating and stopping devices used in the product.
Size: 2''~48''
Connection: Flanged
Material: WCB/SS/Casting
Application: Oil, Water, Gas, Acid
Cast Iron Non Rising Stem Gate Valve
Diameter: DN50-DN600
Pressure: 1.0MPA-2.5MPA
Temperature: -20ºC-150ºC
Size Range: NPS2~NPS24,DN50~DN600
Nominal Pressure: Class 150 /PN10/PN16
Applicable Temperature: 0~200ºC
Size: DN40-DN600
Design standard: GB/T 12232-2005 DIN3352, EN593, MSS SP-67
Pressure standard: GB/T 13927-1992, API598
Size: 2"-48" DN50-DN1200
Connection mode: Flange
Pressure ranking: PN6/10/16,ANSI Class125/150
Forged Steel Handwheel Gate Valve
Size: 1/2''~2'' ( DN15~DN50)
Port: Full Port
Working Pressure: 150LB~1500LB
Manual Lug Type Knife Gate Valve
Specification: DN50 to DN1200
Standard Flange Connection: DIN PN10, ANSI B16.5 Cl#150
Design Standard: MSS SP-81
Quality Assurance
GNEE valves are manufactured in accordance with international quality standards, giving customers peace of mind and guaranteeing optimum performance. Our valves comply with renowned standards such as BS, ANSI, AWWA, API, JIS, DIN, GOST and more.
Experienced team
An experienced team can help ensure that products are produced efficiently and effectively, minimizing errors and delays.
Customer-focused
Customers want to ensure that the products or services they purchase are of high quality and will meet their needs. A company that consistently delivers high-quality products or services will have a good reputation and is likely to attract repeat customers.
Body
The body of a electric gate valves holds all of the operational parts of the valve. It is connected to the system with one of the mounting options below. The mounting option should be selected based on the current system mounting features and the type and size of the media.
Bonnet
The bonnet of a electric gate valves contains the moving parts and is attached to the valve body. The bonnet can be removed from the body in order to allow for maintenance and replacing parts.
Trim
The trim of a electric gate valves contains the functioning pieces of the valve: The stem, the gate, the disc or wedge, and the seat rings.
●Stem - The stem of a electric gate valves is either a rising stem or a nonrising stem. The stem is responsible for the proper positioning of the disk. Nonrising stems will almost always have a pointer-type indicator mounted onto the upper end of the stem to indicate valve position. This configuration protects the threads from carrying dirt into the packing because the stem threads are held within the boundary of the valve packing. Rising stems rise out of the flow path when the valve is opened. They can either have a stem that rises through the handwheel or have a stem that is threaded to the bonnet.
●Seat - The seat of a electric gate valves is either integral with the valve body or in a seat ring type of configuration. The seat ring construction is either threaded on to the body or pressed into position and the seal welded to the valve body. Pressed and welded is recommended for higher temperature applications. Press-in or threaded-in seats permit variation in the seat material verses the material of the body of the valve.
It is important to consider the size of the valve and system when selecting a electric gate valves. Electric gate valves are linear motion valves and therefore are taller than other manual valves. This is especially true if the valve uses a rising stem. Most of the time electric gate valves should be installed horizontally (perpendicular to the ground) with the manual actuator in the top position. This allows for easy access for maintenance and replacing parts. Smaller electric gate valves can be installed in vertical lines, but gravity tends to pull the valve out of alignment.
Electric gate valves are named after the gate-like disc that controls the flow of fluid within the valve. They belong to the family of linear motion valves and operate by either fully opening or closing the passage for fluid to pass through. Unlike ball valves or butterfly valves, electric gate valves are designed for on-off applications, providing a tight seal when closed.
Electric gate valves operate through the movement of a rectangular or circular gate disc that slides across the flow path. When the gate is fully raised, the passage is open, allowing fluid to flow freely. Conversely, lowering the gate blocks the flow, shutting off the supply entirely. This simple yet effective mechanism allows electric gate valves to control the fluid flow with minimal resistance and pressure drop.
Application of Electric Gate Valves
Water works wonders
Water treatment plants rely on electric gate valves for the simple reason that they work well with water. Here, electric gate valves start or stop water flow during treatment processes.
When a valve is open, water moves freely. When closed, it halts, allowing maintenance or controlling the water's journey through the treatment stages.
Energy and power provision
In the energy sector, electric gate valves take on a pivotal role. They are often found in oil and gas pipelines, controlling the movement of these high-value resources.
The oil and gas industry demands that valves can handle not just the flow but also the pressure and the corrosive nature of the media they're dealing with. Electric gate valves meet this challenge with their robust construction and reliable sealing capabilities.
Manufacturing might
In manufacturing, whether food and beverage, pharmaceuticals, or automotive production, controlling the flow of liquids and gases is part of the daily operation. Electric gate valves fit perfectly into systems where a complete cessation of flow is required to ensure quality and safety during production runs.
Hvac and beyond
Heating, ventilation, and air conditioning systems (hvac) utilize electric gate valves to control heating and cooling fluids. The electric gate valves ability to operate without causing significant pressure drop is a preferred choice in these systems for keeping our environments comfortable.
Marine marvels
On the high seas, electric gate valves are unsung heroes in the marine industry. They manage the flow of seawaseawater flownes, ballasting, and even fire protection systems on ships. The valves must resist corrosion from salty water, a testament to the versatility in materials and design that electric gate valves offer.
Fire fighting's frontline
In fire protection systems, the ability to control water flow swiftly and decisively can be the difference between a minor incident and a major disaster. Electric gate valves ensure that water reaches the right places at the correct times, which makes them invaluable in this high-stakes industry.
Agricultural applications
The agricultural industry uses electric gate valves in irrigation systems. They help regulate water supply to fields and ensure crops receive the right amount of water without waste, a critical factor in sustainable agriculture.
Possible Faults And Troubleshooting Methods Of Electric Gate Valves
| Malfunction | Cause | Elimination |
| Non-sealing flow shut-off | Defects on the contact surfaces of the gate disk and the body (scaling, deposits, scratches) | Grind the sealing surfaces on the gate disk and the body. Usually, the contacting surfaces are made of bronze. To do this, remove the cover, pull out the gate disk, and if necessary, the body. Grinding is carried out with diamond pastes of different grits with a gradual transition from coarse to fine. |
| It should be noted that in wedge gate valves, after several grindings, the gate wedge may collapse, which leads to a loss of tightness even with ground surfaces of the wedge. | ||
| Leakage under the gland along the stem | Loose stem packing | Tighten the gland, and if necessary, replace the packing. |
| If the leakage was not eliminated after replacing the packing, it is likely that corrosive deposits have formed in the stem and it will need to be welded or replaced. | ||
| The handwheel cannot be turned | The gate is stuck | This problem occurs in electric gate valves that are not used frequently and are out of the service personnel's attention. The reason is deposits on the sealing surfaces. |
| To solve this problem, it is necessary to remove the upper cover of the gate valve and clean the sealing surfaces of the disk and the body. If necessary, polish the friction surfaces. | ||
| It is not allowed to hit the stem, as this may lead to the rupture of the guiding nut. | ||
| The handwheel turns, but the gate does not open | The electric gate valves is broken, the cheeks have collapsed | In electric gate valves with a rising stem, this problem occurs when the lugs of the stem that hold the gate valve are worn out or if the thread on the nut of the guiding stem is torn. |
| If the problem is in the stem, it must be replaced or the worn lug must be welded. | ||
| If the guiding nut is worn out, it should be replaced if the gate valve design allows it. | ||
| In gate valves with a non-rising stem, the gate may fall out if the nut that is fixed in it is worn out. To eliminate the malfunction, it is necessary to replace the gate, as it is unlikely that the nut with a broken thread can be replaced. |
Company Introduction
Established in 2008 with a registered capital of RMB 5 million, GNEE Group is a leading international supplier specialising in the manufacture and distribution of high quality valves and fittings for a wide range of industrial applications including water supply, sewage systems, oil and gas, and marine treatment. At present, the company has a total investment of 30 million yuan, a plant area of more than 35,000 square metres and more than 200 employees. With a clear strategic framework, a complete governance structure, a solid management foundation, and strong financial and human resources, the company is becoming the most professional international valve supply chain company in the Central Plains.
GNEE valves are manufactured in accordance with international quality standards, giving customers peace of mind and guaranteeing optimum performance. Our valves comply with renowned standards such as BS, ANSI, AWWA, API, JIS, DIN, GOST and more. We go to great lengths to ensure that our products meet the highest industry benchmarks for superior quality and durability. With high quality valves and a professional service process, GNEE valves have been exported to more than 150 countries around the world, and every year more than 50 customers visit the GNEE Group and order more than 30,000 pieces of valves.
Our Certificates
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