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What is an Electric Actuated Gate Valve?

Electric actuated gate valve refers to the linear movement of the electric gate valve actuator through electric voltage and signal control to open or close the gate valve. Electric gate valves can help you achieve the purpose of remote control, help you reduce labor costs, and improve production efficiency.

ZECO electric actuated gate valve is a gate valve controlled by an electric actuator. It can operate the gate valve remotely through an electric device, which is usually installed in the upper part of the gate valve. Electric actuators are divided into three, one is a straight stroke: the valve up and down to control the valve opening (such as single seat valve, double seat valve, sleeve valve, Y valve, etc.); The other is a quarter-turn: driven Angle of the valve is in 0 ~ 90 ° rotation to control the valve opening (such as eccentric butterfly valve, ball valve, rotary valve, plug valves, etc.); The last one is multi-turn electric actuators (360 ° Angle >) is suitable for the gate valves, globe valves, etc. Electric actuator output shaft rotation is more than a week, that is greater than 360 °, generally need more than one ring valve opening and closing process control can be achieved. ZECO is a professional manufacturer of electric gate valves, high quality creates ZECO brand.

How does an Electric Actuated Gate Valve work?

Torque is the rotational force an actuator generates to close a rotational valve. Electric actuators can generate this force by transmitting it to the output shaft and then the valve stem. When pressure is applied to the valve stem, the valve’s orifice opens or closes.

What does an Electric Actuated Gate Valve use for?

Electric actuated gate valve is one of the most commonly used cut-off valves, mainly used to connect or cut off the medium in the pipeline, but not suitable for adjusting the flow of the medium. The gate valve is suitable for a wide range of pressure, temperature, and caliber, especially suitable for medium and large-diameter pipelines.

Features of Electric Gate Valve:

• 1. Spacer ring in conjunction with packing is used in gate valves of 300 class and above while the 150-class valve is only fitted with packing; packing with lantern ring is available upon customer request;
• 2. Flexible wedge is able to compensate for seat surface distortion and body deformation caused by piping stress;
• 3. Blowout retention design: the tapered backseat face firmly contacts the backseat of the bonnet, and the strength of the bonnet-wedge connection exceeds that of the bonnet thread root;
• 4. ZECO electric gate valve is standard equipped with AUMA electric actuator. Other brands can be customized according to customers’ requirements.

Applications of Electric Actuated Gate Valves

Electric actuated gate valve is suitable for water, oil, cement, paper pulp, and other media, and is widely used in paper and pulp, power plants, shipyards, wastewater treatment, and so on.

Material of Electric Actuated Gate Valves

• Actuator Type: Multi-Turn Electric Gate Valve Actuator
• Body Material: Carbon Steel, Stainless Steel, Forged Steel, etc.
• Pressure: 10 / 16 / 20 / 40 / 64 bar (#150 / #300 / #400 / #600 / #900)
• Temperature Of Media: -196 to 585℃
• Suitable Media: Water, Air, Oil, Gas, Pulp, Cement, etc
• Voltage: Three-phase: 380V AC. Range: 380VAC ~ 420VAC; Single-phase: 220V AC. Range: 200VAC ~ 240VAC

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What is a Pneumatic Gate Valve?

ZECO pneumatic gate valve is a gate valve driven by compressed air. ZECO pneumatic gate valve has stable performance and convenient operation. It has been widely used as a quick cut-off valve in oil, natural gas, and other industrial projects. Pneumatic actuator adopts a double-layer cylinder structure, compared with the ordinary single-cylinder actuator, its lifting force is larger, which solves the problem that the opening torque of a large gate valve is too large to open. Because pneumatic actuators open and close quickly, ZECO is equipped with cushioning mechanism to reduce the wear of the sealing surface and gate during quick closing.

Types of Pneumatic Gate Valve

Pneumatic Knife Gate Valve

The Pneumatic Knife Gate Valve is a heavy-duty unit with a cast body, knife gate, stuffing box with packing, and oversized air cylinder. These heavy-duty units have a 150 lbs bolt-hole pattern. Options include a resilient seat for sealing against pressure or vacuum; solenoid valves and proximity sensors.

Specifications of Pneumatic Knife Gate Valve

• Design Standard: MSS SP-81
• F to F: As per MSS SP -81
• Testing Standard: MSS SP -81
• Size Range: 50 mm to 600 mm
• Pressure Rating: 50 mm to 300 mm – 150 psi / 400 mm to 450 mm – 75 psi / 500 mm to 600 mm – 50 psi
• End Style: Full Lugs, Wafer Type, Flangeless / Two Lugs, Wafer Type, Flangeless / Flange Type, Wafer
• Lug Options: a. BSP Threaded hole in the chest area and lugs / b. BSP Threaded a hole in the chest area and through a hole in Lugs.
• Drilling: ANSI B 16.5 Class 150, BS 10 Table ‘D’ & ‘E’, DIN, JIS, IS, etc.
• Valve Operation: Cylinder, Bevel Gear, Electic Motor, Chain Wheel, Lever
• Body Design: Full Round Port / “V” Notch Port / Square Port

Features of Pneumatic Knife Gate Valves

• Heavy Duty Cast Construction
• ASA Bolt Hole Pattern
• Stainless Steel Construction
• Thick beveled edge knife plate
• Resilient rubber seats seal against pressure and vacuum
• Pneumatic or manual actuation
• Oversized air cylinder for pneumatic units

Pneumatic Wedge Gate Valve

Pneumatic wedge gate valve is a forced sealing valve that is operated through the wedge action between sealing surfaces of both valve body and wedge, providing a tight sealing effect.

Features of Pneumatic Wedge Gate Valve

• ZECO pneumatic gate valve adopts a double cylinder structure, the opening force is twice as large as that of a single cylinder structure, and it can easily open those single cylinders that cannot be opened due to the large opening torque of large diameter gate valve or high-pressure gate valve in valve body;
• The pneumatic ZECO pneumatic gate valve has positive and negative functions, which also makes the valve have the function of quick opening and quick closing. In addition, because the wedge structure of the gate valve is more tightly sealed, the pneumatic gate valve has an excellent cutting function, which is more advantageous than other conventional valves;
• The pneumatic ZECO pneumatic gate valve has a buffer mechanism, because the opening or closing speed is too fast, no buffering mechanism may damage the valve body sealing surface and gate sealing surface and cause the valve can not be sealed;
• ZECO pneumatic gate valve can also be equipped with a pneumatic change-over mechanism on the cover of the pneumatic actuator. In case of accidental failure of the pneumatic actuator, the valve can be opened or closed by manual operation.
• Pneumatic Actuator is installed on the top of the bonnet which controls the open and close of the valve by pneumatic pressure.
• Metal Seal between the Body and Bonnet.
• Backseat seal between the stem and the bonnet, easy for the change of sealing stuff under pressure.
• The sealing surface is hard-faced or the QBQ with the performance of anti-corrosion, and wear-resistance.
• Low operating Torque

Specifications of Pneumatic Wedge Gate Valves

• Material: carbon steel, stainless steel, alloy steel, etc.
• Nominal size: NPS 1/2″-NPS 48″ (DN15-DN1200)
• Pressure: CL150-CL2500 (PN10-PN420)
• Temperature range: -196°C to +550°C

Features of Pneumatic Wedge Gate Valves

• Smooth flow path, low coefficient of flow, erosion, and corrosion on sealing surfaces are less likely to occur;
• Unlimited flow direction, no pressure drop, simple structure, a wide range of applications;
• The connections between the valve body and bonnet are available in many forms, such as bolted, threaded, and welded connections, as well as pressure
• self-tightening sealing structure to perfectly adapt to various working statuses;
• Compact and simple structure, small space required for installation, quick opening/closing function, easy to maintain;

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What is a Manual Gate Valve?

ZECO manual gate valve is named according to the driving mode. The gate valve operated manually is usually a small-diameter gate valve. Because the small-diameter torque is low, it can be opened easily by manpower, so there is no need to waste the user cost plus the turbine head or bevel gear device. As a famous brand product of Shanghai China and Jiangsu China, ZECO is dedicated to promoting the ZECO brand to the world, making the quality and service of ZECO brand become the world famous products, and making the users of oil companies, engineering companies and design companies recognize ZECO more step by step. This is a sense of mission and responsibility of ZECO as a national brand, which makes ZECO valve appear in every corner of the world and protects every pipeline in the world.

Features of Manual Gate Valve

• The wedge of ZECO manual gate valve is of the single wedge flexible type providing greater sealing capability and lower torque requirements. This also makes the ZECO manual gate valve easier to open and more convenient for manual operation;
• The wedge of ZECO manual gate valve has accurate guide slots, assuring true alignment and providing full guidance during operation;
• The seat rings of ZECO manual gate valve are seal welded in the body and are made of carbon steel with hard faced seat surfaces. The seat faces on the wedges are made by welding on 13 CR Stainless Steel or Stellite. In addition, the excellent skills of ZECO welding engineers and the precision debugging of welding robot ensure the perfect welding end;
• ZECO manual gate valve is provided with a backseat bushing in the bonnet, enabling the replacement of the stem packing when the valve is in the wide open position.
• Low Emission: < 100 ppm
• Stem straightness and roundness
• Stem surface finish to max. 32 Ra
• Stuffing box surface finish to max. 125 Ra
• Stuffing box and gland cylindricity
• Self centering gland design
• Gland packing: Die-formed graphite rings with braided graphite top and bottom rings
• Corrugated SS and graphite bonnet gaskets

Product Overview of Manual Gate Valve

Material of Manual Gate Valve

Applications of Manual Gate Valve

• Petroleum refining
• Chemical processing
• Power generation
• Applications that require manufacturers to be on an approved manufacturer list (AML)

Manual Operate Gate Valve Manufacturer & Factory

If you are looking for a manual operate gate valve manufacturer, you are in the right place here. ZECO Valve is an industrial manual operate gate valve factory in China. Our main product is ANSI API 600 Gate valve. Other standards also could be customized. We offer all kinds of gate valves in all materials like WCB and stainless steel, design and pressure ranges for your choice. We also offer customized valve service for you to meet your requirements and help your project run well. Welcome to consult us to select the right gate valve basic on your project requirements.

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What is a Cryogenic Valve?

Cryogenic valves are designed to be used in very cold applications.

Cryogenic valves are built to help transport and store such cryogenic gasses safely and efficiently.

How does Cryogenic Valves work?

Cryogenic valves are kept in a natural closed position to keep cryogenic gasses or other medium secure and safely contained. A cryogenic valve is generally designed to react to high pressure which pushes the valve into the open position to allow the gas or other media to flow readily through. Such open flow will continue until the pressure again decreases, at which point it will swing back nd become seal with a special metal seat bubble-tight shutoff to prevent any leaking.

Applications of Cryogenic Valves

• LNG(Liquefied Natural Gas): LNG Liquefaction plants , Terminal
• Ethylene Plants
• Industrial low-temperature gases plant

What is a Cryogenic Globe Valve?

ZECO cryogenic globe valve is available in low temperature -196 ℃ ultra-low torque which under the condition of low temperature and stable operation, and validated the sealing material of low-temperature materials also ensures ZECO cryogenic globe valve can be in extreme cases, good sealing performance and long service life and ZECO is a professional exporter of cryogenic globe valve, the products are widely used in LNG, LPG and other industrial conditions at low temperature. Cryogenic globe valve storage is also very important, If you want a few weeks or months to storage valves, need to cost for improving the original  storage conditions. Valve usually storage indoor, make the actual temperature of valves is higher than dew-point temperature. If the valves must be storage outside, It should be supported, not to contact with ground, and use waterproof cover to prevent.

Features of Cryogenic Globe Valve:

• The plug seat surface of ZECO cryogenic globe valve is standard disc design as well as spherical, parabola or flat seating surface is optional on customer request;
• Because medium and low pressure pipelines can be well connected and sealed by flange connection, ZECO cryogenic globe valves below 600 lb are usually connected with flange connection, while over 600 lb are usually connected with RTJ connection to better connect the valve to the pipeline due to high pressure;
• In order to keep the stuffing box away from low temperature media and prevent long-term contact damage affecting sealing performance, The stem of ZECO cryogenic globe valve is is lengthened to make the packing last longer;
• The stem of ZECO cryogenic globe valve is designed in anti blow out.

Material of Cryogenic Globe Valve:

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What is a Gear Valve?

Gear valves are the more complex of the two manual operators. Their installation and operation usually require more effort than lever operated valves. Most gear valves have worm gears that make them easier to open and close. This means that the majority of gear valves can fully open or close with only a few turns.

How to use a Gear Valve?

The main quality that sets gear-operated valves apart is the way in which it is operated. This type of valve requires manual operation. Gear-operated valves regulate the flow of liquid or gas. This involves the operation of a wheel moving a disc that holds or releases the liquid or gas through a system. This is hand-operated, making it simple to control the flow whenever you want.

Typically, manual operators, such as gear-operated valves, are inexpensive. These valves are a good choice for high-stress environments and small spaces. Though gear-operated valves are a little more complex than other manually operated valves, most can open or close with a few simple turns. However, with some applications, this can become tiresome over time.

Applications of Gear Operated Valve

Gear operated valves are usually used in high-stress & big size situations.

What is a Gear Operated Gate Valve?

ZECO gear operated gate valve is defined according to the driving mode. Gear operated gate valve is mainly used for large-diameter gate valves. Because of the large torque, it is almost impossible to open the valve by manual operation. ZECO, as a Chinese manufacturer of gear operated gate valves, can design and manufacture the gear units to be waterproof for outdoor use according to customers’ requirements.ZECO gear operated gate valve is available in carbon steel series, stainless steel series, alloy steel series, and low-temperature steel series. As an expert in industrial pipeline valve solutions, ZECO specializes in designing and manufacturing industrial valves to assure customers of quality.

Features of Gear Operated Gate Valve

• ZECO gear operated gate valve adopts the top-mounted stem nut design, because of the corrosion situation outdoors, the handwheel is probably the easiest to corrosion damage parts, and in replacing the handwheel, ZECO design can ensure the stem and disc in the condition of the open valve, even can’t fall off the handwheel, ensure the valve in the pipeline in the process of maintaining the normal use;
• The packing of ZECO gear operated gate valve is made of a flexible graphite material, and its sealing performance is very reliable after nearly 30 years of use. But also according to the requirements of the user, the choice of packing ring and grease structure to ensure that the valve stem seal;
• The stem of ZECO gear operated gate valve is connected to the gate by a t-groove, which allows the gate to be automatically corrected and sealed normally if it is offset by medium impact;
• The casting of ZECO gear operated gate valve has been strictly inspected by the inspection department to ensure that all materials can meet international standards and make users feel more assured in use.

What are Different Types of Gear Operated Gate Valves?

There are three ways to classify the gate valve.

Types of Disk

• Solid wedge
  • The solid, or single wedge gate valve is the most widely used and the lowest cost used type in the process industry for oil, gas, and air services. The purpose of the wedge shape is to introduce a high supplementary seating load. Solid-Wedge Gate Valve can be installed in any position, suitable for almost all fluids and practical for turbulent flow services.
• Flexible wedge
  • The Flexible wedge gate valve employs a flexible wedge that is a one-piece disk with a cut around the perimeter (the cut varies in size, shape, and depth). Thermal expansion and contraction entail no problems in such kinds of gate valves as the disk is able to compensate for this and remains easy to open. Flexible wedge gate valves are widely used in steam systems to prevent thermal blinding
• Split wedge or Parallel disks Valve
  • Parallel disk gate valves consist of two discs that are forced apart against parallel seats by a spring at the point of the closure. The most famous type is the knife gate valve which has a flat gate between two parallel seats (an upstream and a downstream seat) to achieve the required shut-off. The application of a parallel gate valve is limited to low pressures and low-pressure drops.

Types of Body Bonnet Joint

• Screwed Bonnet
  • This is the simplest design available and it is used for inexpensive valves.
• Bolted-Bonnet
  • This is the most popular design and is used in a large number of gate valves. This requires a gasket to seal the joint between the body and the bonnet.
• Welded-Bonnet
  • This is a popular design where disassembly is not required. They are lighter in weight than their bolted-bonnet counterparts.
• Pressure-Seal Bonnet
  • This type is used extensively for high-pressure high-temperature applications. The higher the body cavity pressure, the greater the force on the gasket in a pressure-seal valve.

Types of Stem Movement

• Rising Stem or OS & Y Type (Outside Stem and Screw Type)
• Non-rising Stem type

What are the Advantages of Gear Operated Gate Valve?

1. Small flow resistance;
2. Opening and closing torque is small;
3. Can be used in the medium to flow in two directions of the ring network pipeline, that is to say, the flow direction of the medium is not limited;
4. When fully open, the sealing surface is less eroded by the working medium than the globe valve;
5. The body structure is relatively simple, the manufacturing process is better;
6. The structural length is relatively short.

What are the Disadvantages of Gear Operated Gate Valve?

• They cannot be opened and closed quickly. To fully open or close wheel or gearbox actuators, the shaft should be rotated as many as the full open revolution number. The full open revolution number is equal to the pitch
• 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.
• In systems where high-temperature changes irregularly, due to the load in the pipe at the valve end, leakages in gate valves occur.
• At the place of operation, repair, and maintenance of seating surfaces are difficult.

Material of Gear Operated Gate Valve

Difference Between Gear Operated Valve and Lever Operated Valve

Many customers are not very clear about lever/handle/handwheel operated valve and gear operated valve and do not know when to use lever/handle/handwheel operated valve and when to use gear operated valve. The following are applicable working conditions for them.

Both lever/handle/handwheel operated valve and gear operated valve are valves that require manual operation, they are generally called manual valves, but there are still differences between the two in use.

The handwheel of lever/handle/handwheel operated valve drives disc directly, which opens and closes quickly but is laborious; Gear operated valve drives disc through the gear, which opens and closes slowly but saves effort. Therefore, when the pressure in the pipeline is high, it will be particularly laborious to use lever/handle/handwheel operated valve. At this time, gear operated valve should be selected.

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What is Motorized Valve:

A motorized valve is a valve type that uses an electric motor to open or close its mechanism. This type of valve is ideally suited to very large valve types or remote fluid control applications such as aircraft deicing, agricultural irrigation, and automated fire suppression. Most valve types are suited for motorized applications with some commonly used types being a gate, ball, and butterfly. The motorized valve is also well suited to remote flow control applications where system inputs involve incremental valve operation. The internal fluid control mechanisms of motorized valves are generally identical to their manual counterparts; valve actuation inputs are the only difference between the two.

ZECO electric gate valve is named according to the driving mode,  motorized gate valve as the name suggests is driven by an electric actuated gate valve. The electric gate valve designed by ZECO is in line with the SIL 3 Safety and Integrity Level for Automated Valves. ZECO Valve Group uses modern machinery and the latemolduld to produce the latest advanced manufacturing facilities, to provide users with the highest quality flow control products, and a very competitive price. All cast parts, especially body and bonnet, have heavy sections to ensure strength, durability, and reliable and safe use in a wide range of service environments. Steel alloys for body and bonnet are carefully selected for good casting quality, structural stability, mechanical strain,gth, and safe weldability. Castings are cast under strict and critical metallurgical and laboratory supervision. They are heat-treated, thoroughly cleaned by standing spray and carefully checked to ensure that they are free from defects. All castings of these valves are by appropriate ASTM standards.

How does a Motorized Valve work?

Motorized Valve is a power supply to drive the motor rotation, thus opening or closing the valve of a device, and withstanding voltage shocks. The rotating range of the electric valve is adjustable. The rotating range can be adjusted by inputting the specified current and voltage signals. The general control signals are: current signal (4 ~ 20mA, 0 ~ 10mA) or voltage signal (0 ~ 5V, 1 ~ 5V).

Application of Motorized Valves

Motorized valves typically feature an electric motor that drives an advanced mechanism through a gear train to open or close them. The particular advanced mechanism depends on the type of valve. Vertical travel valves such as gate or sluice valves usually use a lead screw mechanism that lifts or drops the gate plate and are usually found in larger systems such as water mains. Globe valves also use a screw advance mechanism to position the tapered plug which controls the fluid flow in high precision metering applications.

Features of Motorized Valves:

• ZECO electric gate valve can be operated remotely and the user can operate and check the valve status in the control room. It reduces the waste of personnel needed to run to the site to close gate valves without electric actuators and also reduces the situation that valves cannot be closed in dangerous situations;
• ZECO electric gate valve can be customized asbestos-free packing or graphite packing;
• ZECO electric gate valve will fix the electric actuator in the transportation process to prevent the damage to the electric actuator caused by the bump in the transportation process;
• Low torque of ZECO electric gate valve can reduce the cost of the electric actuator.

Material of Electric Gate Valve:

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